EVAL-ADE7880EBZ

Analog Devices Inc.
The ADE7880 is high accuracy, 3-phase electrical energy measurement IC with serial interfaces and three flexible pulse outputs. The ADE7880 device incorporates second-order sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and all of the signal processing required to perform the total (fundamental and harmonic) active, and apparent energy measurements, rms calculations, as well as fundamental-only active and reactive energy measurements. In addition, the ADE7880 computes the rms of harmonics on the phase and neutral currents and on the phase voltages, together with the active, reactive, and apparent power, and the power factor and harmonic distortion on each harmonic for all phases. Total harmonic distortion plus noise (THD + N) is computed for all currents and voltages. A fixed function digital signal processor (DSP) executes this signal processing. The DSP program is stored in the internal ROM memory.The ADE7880 is suitable for measuring active, reactive, and apparent energy in various 3-phase configurations, such as wye or delta services with both three and four wires. The ADE7880 provides system calibration features for each phase, that is, rms offset correction, phase calibration, and gain calibration. The CF1, CF2, and CF3 logic outputs provide a wide choice of power information: total active powers, apparent powers, or the sum of the current rms values, and fundamental active and reactive powers.The ADE7880 contains waveform sample registers that allow access to all ADC outputs. The devices also incorporate power quality measurements, such as short duration low or high voltage detections, short duration high current variations, line voltage period measurement, and angles between phase voltages and currents. Two serial interfaces, SPI and I2C, can be used to communicate with the ADE7880. A dedicated high speed interface, the high speed data capture (HSDC) port, can be used in conjunction with I2C to provide access to the ADC outputs and real-time power information. The ADE7880 also has two interrupt request pins, IRQ0 and IRQ1, to indicate that an enabled interrupt event has occurred. Three specially designed low power modes ensure the continuity of energy accumulation when the ADE7880 is in a tampering situation. The ADE7880 is available in the 40-lead LFCSP, Pb-free package, pin-for-pin compatible with ADE7854, ADE7858, ADE7868, and ADE7878 devices.APPLICATIONS Energy metering systems Power quality monitoring Solar inverters Process monitoring Protective devices
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey EVAL-ADE7880EBZ 1 1 $541.66 $541.66 $541.66 $541.66 $541.66 $541.66
Analog Devices Inc EVAL-ADE7880EBZ 0 $540.82 $540.82 $540.82 $540.82 $540.82 $540.82
Arrow North American Components EVAL-ADE7880EBZ 0 1 $510.73 $0.00 $0.00 $0.00 $0.00 $0.00
element14 APAC EVAL-ADE7880EBZ 1 1 $649.84 $649.84 $649.84 $649.84 $649.84 $649.84
Farnell EVAL-ADE7880EBZ 1 1 $355.00 $355.00 $355.00 $355.00 $355.00 $355.00
Mouser Electronics EVAL-ADE7880EBZ 4 1 $543.13 $543.13 $543.13 $543.13 $543.13 $543.13
Newark EVAL-ADE7880EBZ 2 1 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00
Verical Marketplace EVAL-ADE7880EBZ 12 1 $552.07 $569.19 $561.60 $561.60 $561.60 $561.60

EVAL-ADUM7643EBZ

Analog Devices Inc.
The ADuM7640 / ADuM7641 / ADuM7642 / ADuM7643 are 6-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology. These 1 kV digital isolation devices are packaged in a small 20-lead QSOP. They offer space savings and a lower price than 2.5 kV or 5 kV isolation solutions when only functional isolation is needed.This family, like many Analog Devices isolators, offers very lowpower consumption, using one-tenth to one-sixth the power of other digital isolators, with the supply voltage on either sideranging from 3.0 V to 5.5 V. Despite their low power consumption,the ADuM7640 / ADuM7641 / ADuM7642 / ADuM7643 provide low pulse width distortion (< 6 ns for C grade) and a channel-by-channel glitch filter to protect the device against extraneous noise disturbances. Four channel direction combinations areavailable with a maximum data rate of 1 Mbps or 25 Mbps. Allproducts have a default output high logic state in the absence of input power.APPLICATIONS General-purpose, multichannel isolation SPI interface/data converter isolation RS-232/RS-422/RS-485 transceivers Industrial field bus isolation
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey EVAL-ADUM7643EBZ 0 1 $67.39 $67.39 $67.39 $67.39 $67.39 $67.39
Analog Devices Inc EVAL-ADUM7643EBZ 0 $66.21 $66.21 $66.21 $66.21 $66.21 $66.21
Arrow North American Components EVAL-ADUM7643EBZ 0 1 $62.30 $62.30 $62.30 $62.30 $62.30 $62.30
Mouser Electronics EVAL-ADUM7643EBZ 1 1 $68.87 $68.87 $68.87 $68.87 $68.87 $68.87
Verical Marketplace EVAL-ADUM7643EBZ 106 1 $65.52 $68.75 $66.89 $66.00 $66.00 $66.00

EVAL-ADXL362Z-MLP

Analog Devices Inc.
The ADXL362 is an ultralow power, 3-axis MEMS accelerometer that consumes less than 2 μA at a 100 Hz output data rate and 270 nA when in motion triggered wake-up mode. Unlike accelerometers that use power duty cycling to achieve low power consumption, the ADXL362 does not alias input signals by undersampling; it samples the full bandwidth of the sensor at all data rates.The ADXL362 always provides 12-bit output resolution; 8-bit formatted data is also provided for more efficient single-byte transfers when a lower resolution is sufficient. Measurement ranges of ±2 g, ±4 g, and ±8 g are available, with a resolution of 1 mg/LSB on the ±2 g range. For applications where a noise level lower than the normal 550 μg/√Hz of the ADXL362 is desired, either of two lower noise modes (down to 175 μg/√Hz typical) can be selected at minimal increase in supply current.In addition to its ultralow power consumption, the ADXL362 has many features to enable true system level power reduction. It includes a deep multimode output FIFO, a built-in micropower temperature sensor, and several activity detection modes including adjustable threshold sleep and wake-up operation that can run as low as 270 nA at a 6 Hz (approximate) measurement rate. A pin output is provided to directly control an external switch when activity is detected, if desired. In addition, the ADXL362 has provisions for external control of sampling time and/or an external clock.The ADXL362 operates on a wide 1.6 V to 3.5 V supply range, and can interface, if necessary, to a host operating on a separate, lower supply voltage. The ADXL362 is available in a 3 mm × 3.25 mm × 1.06 mm package.APPLICATIONS Hearing aids Home healthcare devices Motion enabled power save switches Wireless sensors Motion enabled metering devices
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey EVAL-ADXL362Z-MLP 0 1 $338.63 $338.63 $338.63 $338.63 $338.63 $338.63
Analog Devices Inc EVAL-ADXL362Z-MLP 0 $333.79 $333.79 $333.79 $333.79 $333.79 $333.79
Arrow North American Components EVAL-ADXL362Z-MLP 2 1 $329.57 $329.57 $329.57 $329.57 $329.57 $329.57
element14 APAC EVAL-ADXL362Z-MLP 1 1 $426.46 $426.46 $426.46 $426.46 $426.46 $426.46
Farnell EVAL-ADXL362Z-MLP 1 1 $205.00 $205.00 $205.00 $205.00 $205.00 $205.00
Mouser Electronics EVAL-ADXL362Z-MLP 3 1 $361.63 $361.63 $361.63 $361.63 $361.63 $361.63
Newark EVAL-ADXL362Z-MLP 0 $270.79 $270.79 $270.79 $270.79 $270.79 $270.79
Verical Marketplace EVAL-ADXL362Z-MLP 2 1 $329.57 $329.57 $329.57 $329.57 $329.57 $329.57
Win Source EVAL-ADXL362Z-MLP 2 1

AD5629RARUZ-1

Analog Devices Inc.
The AD5629R device is a low power, octal, 12-bit, buffered voltage-output DACs. It operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design.The AD5629R/AD5669R have an on-chip reference with aninternal gain of 2. The AD5629R-1/AD5669R-1 have a 1.25 V,5 ppm/°C reference, giving a full-scale output range of 2.5 V.The AD5629R-2/AD5629R-3 and the AD5669R-2/AD5669R-3have a 2.5 V 5 ppm/°C reference, giving a full-scale output rangeof 5 V depending on the option selected. Devices with 1.25 Vreference selected operate from a single 2.7 V to 5.5 V supply.Devices with 2.5 V reference selected operate from 4.5 V to 5.5 V.The on-chip reference is off at power-up, allowing the use of anexternal reference. The internal reference is enabled via asoftware write.The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or all DAC channels.Product Highlights Octal, 12-/16-bit DACs. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. Available in 16-lead LFCSP and TSSOP, and 16-ball WLCSP. Power-on reset to 0 V or midscale. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V.Applications Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5629RARUZ-1 0 1000 $12.59 $12.59
Analog Devices Inc AD5629RARUZ-1 37 1 $20.60 $19.00 $18.15 $16.22 $15.11 $15.11
Arrow Europe AD5629RARUZ-1 5 1 $13.86 $13.86 $13.86 $12.43 $11.35 $11.35
Arrow North American Components AD5629RARUZ-1 0 70 $16.28 $16.28 $16.28 $13.60 $12.32 $11.62
element14 APAC AD5629RARUZ-1 57 1 * $24.28 * $17.32 * $17.32 * $14.22 * $13.65 * $13.65
Farnell AD5629RARUZ-1 57 1 * $23.59 * $16.96 * $16.96 * $13.90 * $13.35 * $13.35
Mouser Electronics AD5629RARUZ-1 89 1 $17.15 $15.56 $14.08 $12.66 $10.61 $10.61
Newark AD5629RARUZ-1 57 1 $21.50 $15.33 $13.50 $13.50 $12.59 $12.59
Verical Marketplace AD5629RARUZ-1 5 1 $11.31 $11.31 $11.31 $13.60 $12.32 $12.32
Win Source AD5629RARUZ-1 2350 2

AD5629RBCBZ-1-RL7

Analog Devices Inc.
The AD5629R device is a low power, octal, 12-bit, buffered voltage-output DACs. It operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design.The AD5629R/AD5669R have an on-chip reference with aninternal gain of 2. The AD5629R-1/AD5669R-1 have a 1.25 V,5 ppm/°C reference, giving a full-scale output range of 2.5 V.The AD5629R-2/AD5629R-3 and the AD5669R-2/AD5669R-3have a 2.5 V 5 ppm/°C reference, giving a full-scale output rangeof 5 V depending on the option selected. Devices with 1.25 Vreference selected operate from a single 2.7 V to 5.5 V supply.Devices with 2.5 V reference selected operate from 4.5 V to 5.5 V.The on-chip reference is off at power-up, allowing the use of anexternal reference. The internal reference is enabled via asoftware write.The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or all DAC channels.Product Highlights Octal, 12-/16-bit DACs. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. Available in 16-lead LFCSP and TSSOP, and 16-ball WLCSP. Power-on reset to 0 V or midscale. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V.Applications Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5629RBCBZ-1-RL7 1385 1 $20.79 $10.00 $25.00 $100.00 $100.00 $3,000.00
Analog Devices Inc AD5629RBCBZ-1-RL7 0 $16.70 $16.70 $16.70 $16.70 $16.70 $16.70
Arrow North American Components AD5629RBCBZ-1-RL7 0 3000 $11.82
Mouser Electronics AD5629RBCBZ-1-RL7 0 3000 $10.33
Verical Marketplace AD5629RBCBZ-1-RL7 3000 3000 $12.18

AD5669RACPZ-2-RL7

Analog Devices Inc.
The AD5669R device is a low power, octal, 16-bit, buffered voltage-output DACs. It operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design.The AD5629R/AD5669R have an on-chip reference with aninternal gain of 2. The AD5629R-1/AD5669R-1 have a 1.25 V,5 ppm/°C reference, giving a full-scale output range of 2.5 V.The AD5629R-2/AD5629R-3 and the AD5669R-2/AD5669R-3have a 2.5 V 5 ppm/°C reference, giving a full-scale output rangeof 5 V depending on the option selected. Devices with 1.25 Vreference selected operate from a single 2.7 V to 5.5 V supply.Devices with 2.5 V reference selected operate from 4.5 V to 5.5 V.The on-chip reference is off at power-up, allowing the use of anexternal reference. The internal reference is enabled via asoftware write.The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or all DAC channels.Product Highlights Octal, 16-bit DACs. On-chip 1.25 V/2.5 V, 5 ppm/°C reference. Available in 16-lead LFCSP and TSSOP, and 16-ball WLCSP. Power-on reset to 0 V or midscale. Power-down capability. When powered down, the DAC typically consumes 200 nA at 3 V and 400 nA at 5 V.Applications Process control Data acquisition systems Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5669RACPZ-2-RL7 0 1500 $19.05
Analog Devices Inc AD5669RACPZ-2-RL7 0
Mouser Electronics AD5669RACPZ-2-RL7 $15.98
Win Source AD5669RACPZ-2-RL7 5200 3

AD5748ACPZ

Analog Devices Inc.
The AD5748 is a single-channel, low cost, precision, voltage/current output driver with hardware or software programmable output ranges. The software ranges are configured via an SPI-/ MICROWIRE™-compatible serial interface. The AD5748 targets applications in PLC and industrial process control. The analog input to the AD5748 is provided from a low voltage, single-supply, digital-to-analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range. The analog input range is 0 V to 4.096 V.The output current range is programmable across two current ranges: 4 mA to 21 mA and 0 mA to 21 mA.Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10.5 V, or ±10.5 V output range.Analog outputs are short-circuit and open-circuit protected and can drive capacitive loads of 2 μF and inductive loads of 0.1 H.The device is specified to operate with a power supply range from ±12 V to ±24 V. Output loop compliance is 0 V to AVDD − 2.75 V.The flexible serial interface is SPI- and MICROWIRE-compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC error checking feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur.The device also includes a power-on-reset function, ensuring that the device powers up in a known state (0 V or tristate), and a asynchronous CLEAR pin that sets the outputs to zero scale/midscale voltage output or the low end of the selected current range.An HW SELECT pin is used to configure the part for hardware or software mode on power-up.Note that the plots in the Typical Performance Characteristics section of this data sheet contain information on the standard ranges, as released in the AD5750/AD5750-1 data sheet. Although the overranges have been tested, new plots were not generated and substitution data was used for plotting purposes.APPLICATIONS Process control Actuator control PLCs
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5748ACPZ 0 1500 $1.00 $10.00 $25.00 $25.00 $531.00 $3.85
Analog Devices Inc AD5748ACPZ 0 $7.11 $6.43 $6.13 $6.13 $6.13 $6.13
Arrow North American Components AD5748ACPZ 0 177 $2.80 $2.77
Farnell AD5748ACPZ 0 1 $5.61 $4.22 $4.22 $4.12 $2.81 $2.81
Mouser Electronics AD5748ACPZ 5 1 $6.75 $6.10 $5.05 $4.56 $3.65 $3.65
Newark AD5748ACPZ 0 $5.75 $5.13 $4.34 $4.20 $4.20 $4.20
Verical Marketplace AD5748ACPZ 708 177 $3.49 $3.49
Win Source AD5748ACPZ 486 2

AD5750-1BCPZ

Analog Devices Inc.
The AD5750 / AD5750-1 / AD5750-2 are single-channel, low cost, precision voltage/current output drivers with hardware- or software-programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE™-compatible serial interface. The AD5750 / AD5750-1 / AD5750-2 target applications in PLC and industrial process control. The analog input to the AD5750 / AD5750-1 / AD5750-2 is provided from a low voltage, single-supply digital-to-analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range. Analog input ranges available are 0 V to 2.5 V (AD5750-1 / AD5750-2) or 0 V to 4.096 V (AD5750).The output current range is programmable across five current ranges: 4 mA to 20 mA, 0 mA to 20 mA or 0 mA to 24 mA, ±20 mA, and ±24 mA. An overrange of 2% is available on the unipolar current ranges.Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V output ranges. An overrange of 20% is available on the voltage ranges.Analog outputs are short-circuit and open-circuit protected and can drive capacitive loads of 1 μF and inductive loads of 0.1 H.The device is specified to operate with a power supply range from ±12 V to ±24 V. Output loop compliance is 0 V to AVDD − 2.75 V.The flexible serial interface is SPI and MICROWIRE compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC error checking feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur.The device also includes a power-on reset function, ensuring that the device powers up in a known state (0 V or tristate), and an asynchronous CLEAR pin that sets the outputs to zero scale/midscale voltage output or the low end of the selected current range.An HW SELECT pin is used to configure the part for hardware or software mode on power-up.APPLICATIONS Process control Actuator control PLCs
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5750-1BCPZ 1250 1 $9.50 $7.40 $6.88 $6.38 $4.85 $5.65
Analog Devices Inc AD5750-1BCPZ 0 $10.52 $9.50 $9.06 $9.06 $9.06 $9.06
Arrow North American Components AD5750-1BCPZ 0 119 $0.00 $4.72
Farnell AD5750-1BCPZ 0 1 $4.90 $3.67 $3.67 $3.55 $2.98 $2.98
Mouser Electronics AD5750-1BCPZ 162 1 $9.82 $6.89 $5.40 $5.39 $5.39 $5.39
Newark AD5750-1BCPZ 0 $8.08 $7.27 $6.43 $6.10 $6.10 $6.10
Verical Marketplace AD5750-1BCPZ 1071 119 $6.06 $6.06

AD5755-1ACPZ

Analog Devices Inc.
The AD5755-1 is a quad, voltage and current output digital-to-analog converter (DAC) that operates with a power supply range from −26.4 V to +33 V. On-chip dynamic power control minimizes package power dissipation in current mode. This is achieved by regulating the voltage on the output driver from 7.4 V to 29.5 V using a dc-to-dc boost converter optimized for minimum on-chip power dissipation. Each channel has a corresponding CHART pin so that HART signals can be coupled onto the current output of the AD5755-1.The device uses a versatile 3-wire serial interface that operates at clock rates of up to 30 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, DSP, and microcontroller interface standards. The interface also features optional CRC-8 packet error checking, as well as a watchdog timer that monitors activity on the interface.PRODUCT HIGHLIGHTS Dynamic power control for thermal management. 16-bit performance. Multichannel. HART compliant. APPLICATIONS Process control Actuator control Programmable logic controllers (PLCs) HART network connectivity
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5755-1ACPZ 668 1 $36.07 $26.62 $24.42 $24.42 $24.43 $24.43
Analog Devices Inc AD5755-1ACPZ 0 $39.97 $36.87 $35.21 $35.21 $35.21 $35.21
Arrow Europe AD5755-1ACPZ 18 1 $27.89 $26.20 $24.27 $22.61 $20.63 $20.63
Arrow North American Components AD5755-1ACPZ 0 27 $24.69 $24.34 $0.00 $0.00
element14 APAC AD5755-1ACPZ 1 1 * $40.74 * $30.07 * $27.58 * $27.04 * $26.48 * $26.48
Farnell AD5755-1ACPZ 1 1 * $39.86 * $29.41 * $27.00 * $26.46 * $25.92 * $25.92
Mouser Electronics AD5755-1ACPZ 13 1 $36.08 $26.63 $25.40 $25.40 $25.40 $25.40
Newark AD5755-1ACPZ 1 1 $36.07 $26.63 $24.46 $24.46 $24.46 $24.46
Verical Marketplace AD5755-1ACPZ 58 29 $0.00 $0.00 $28.36 $0.00 $0.00 $0.00
Win Source AD5755-1ACPZ 5263 1 $132.76 $116.57 $116.57 $116.57 $116.57 $116.57

AD5781BRUZ-REEL7

Analog Devices Inc.
The AD5781 is a single 18-bit, unbuffered voltage-output DAC that operates from a bipolar supply of up to 33 V. The AD5781 accepts a positive reference input in the range 5V to VDD – 2.5 V and a negative reference input in the range VSS + 2.5 V to 0 V. The AD5781 offers a relative accuracy specification of ±0.5 LSB max, and operation is guaranteed monotonic with a ±0.5 LSB DNL maximum specification.The part uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and that is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides an output clamp feature that places the output in a defined load state.PRODUCT HIGHLIGHTS True 18-Bit Accuracy. Wide Power Supply Range of Up to ±16.5 V. −40°C to +125°C Operating Temperature Range. Low 7.5 nV/√Hz Noise. Low 0.05 ppm/°C Temperature Drift.APPLICATIONS Medical Instrumentation Test and Measurement Industrial Control Scientific and Aerospace Instrumentation Data Acquisition Systems Digital Gain and Offset Adjustment Power Supply Control
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey AD5781BRUZ-REEL7 0 1000 $35.32 $35.32 $35.32 $41.03 $41.03
Analog Devices Inc AD5781BRUZ-REEL7 0 $57.40 $53.92 $52.18 $49.23 $49.23 $49.23
Arrow North American Components AD5781BRUZ-REEL7 0 1000 $40.52 $40.52
Farnell AD5781BRUZ-REEL7 0 1000 * $0.00 * $0.00 * $0.00 * $0.00 * $45.90 * $45.90
Mouser Electronics AD5781BRUZ-REEL7 0 1000 $44.01 $44.01
Win Source AD5781BRUZ-REEL7 2000 1