The AD8372 is a dual, digitally controlled, variable gainamplifier (VGA) that provides precise gain control, high IP3,and low noise figure. The excellent distortion performance andmoderate signal bandwidth make the AD8372 a suitable gain control device for a variety of multichannel receiverapplications.For wide input dynamic range applications, the AD8372provides a broad 41 dB gain range. The gain is programmedthrough a bidirectional 4-pin serial interface. The serial interface consists of a clock, latch, data input, and data output linesfor each channel. The AD8372 provides the ability to set the transconductance of the output stage using a single external resistor. The RXT1 and RXT2 pins provide a band gap derived stable reference voltage of 1.56 V. Typically 2.0 k? shunt resistors to ground are used toset the maximum gain to a nominal value of 31 dB. The currentsetting resistors can be adjusted to manipulate the gain anddistortion performance of each channel. This is a flexible feature in applications where it is desirable to trade off distortion performance for lower power consumption.The AD8372 is powered on by applying the appropriate logiclevel to the ENB1, ENB2 pins. When powered down, the AD8372consumes less than 2.6 mA and offers excellent input-to-outputisolation. The gain setting is preserved when powered down.Fabricated on an Analog Devices, Inc., high frequency BiCMOS process, the AD8372 provides precise gain adjustment capabilities with good distortion performance. The quiescent current of theAD8372 is typically 106 mA per channel. The AD8372 amplifier comes in a compact, thermally enhanced 5 mm ? 5 mm 32-leadLFCSP package and operates over the temperature range of ?40?C to +85?C.Applications Differential ADC drivers CMTS upstream direct sampling receivers CATV modem signal scaling Generic RF/IF gain stages Single-ended-to-differential conversion

The AD8418 is a high voltage, high resolution current shunt amplifier. It features an initial gain of 20 V/V, with a maximum ?0.15% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8418 offers excellent input common-mode rejection from ?2 V to +70 V. The AD8418 performs bidirectional current measurements across a shunt resistor in a variety of automotive and industrial applications, including motor control, battery management, and solenoid control.The AD8418 offers breakthrough performance throughout the ?40?C to +125?C temperature range. It features a zero drift core, which leads to a typical offset drift of 0.1 ?V/?C throughout the operating temperature range and the common-mode voltage range. The AD8418 is fully qualified for automotive applications and includes EMI filters and patented circuitry to enable output accuracy with pulse-width modulation (PWM) type input common-mode voltages. The typical input offset voltage is ?200 ?V. The AD8418 is offered in 8-lead MSOP and SOIC packages.Applications High-side current sensing in Motor controls Solenoid controls Power management Low-side current sensing Diagnostic protection

The AD8479 is a difference amplifier with a very high inputcommon-mode voltage range. The AD8479 is a precision devicethat allows the user to accurately measure differential signals inthe presence of high common-mode voltages up to ?600 V.The AD8479 can replace costly isolation amplifiers in applicationsthat do not require galvanic isolation. The device operates overa ?600 V common-mode voltage range and has inputs that areprotected from common-mode or differential mode transientsup to ?600 V.The AD8479 has low offset voltage, low offset voltage drift, low gain drift, low common-mode rejection drift, and excellent common-mode rejection ratio (CMRR) over a wide frequency range.The AD8479 is available in a space-saving 8-lead SOIC package and is operational over the ?40?C to +125?C temperature range.Applications High voltage current sensing Battery cell voltage monitors Power supply current monitors Motor controls Isolation

The ADA4530-1 is a femtoampere (10?15 A) level input bias current operational amplifier suitable for use as an electrometer that also includes an integrated guard buffer. It has an operating voltage range of 4.5 V to 16 V, enabling it to operate in conventional 5 V and 10 V single supply systems as well as ?2.5 V and ?5 V dual supply systems.It provides ultralow input bias currents that are production tested at 25?C and at 125?C to ensure the device meets its performance goals in user systems. The integrated guard buffer isolates the input pins from leakage in the printed circuit board (PCB), minimizes board component count, and enables easy system design. The ADA4530-1 is available in an industry-standard surface-mount 8-lead SOIC package with a unique pinout optimized to prevent signals from coupling between the sensitive input pins, the power supplies, and the output pin while enabling easy routing of the guard ring traces.The ADA4530-1 also offers low offset voltage, low offset drift, and low voltage and current noise needed for the types of applications that require such low leakages.To maximize the dynamic range of the system, the ADA4530-1 has a rail-to-rail output stage that can typically drive to within 30 mV of the supply rails under a 10 k? load.The ADA4530-1 operates over the ?40?C to +125?C industrial temperature range and is available in an 8-lead SOIC package.Applications Laboratory and analytical instrumentation: spectrophotometers, chromatographs, mass spectrometers, and potentiostatic and amperostatic coulometry Instrumentation: picoammeters and coulombmeters Transimpedance amplifier (TIA) for photodiodes, ion chambers, and working electrode measurements High impedance buffering for chemical sensors and capacitive sensors

The ADA4851-1 (single), ADA4851-2 (dual), and ADA4851-4 (quad) are low cost, high speed, voltage feedback rail-to-rail output op amps. Despite their low price, these parts provide excellent overall performance and versatility. The 130 MHz, ?3 dB bandwidth and high slew rate make these amplifiers well suited for many general-purpose, high speed applications.The ADA4851 family is designed to operate at supply voltages as low as +3 V and up to ?5 V. These parts provide true single-supply capability, allowing input signals to extend 200 mV below the negative rail and to within 2.2 V of the positive rail. On the output, the amplifiers can swing within 60 mV of either supply rail.With their combination of low price, excellent differential gain (0.08%), differential phase (0.09?), and 0.1 dB flatness out to 11 MHz, these amplifiers are ideal for consumer video applications.The ADA4851 family is designed to work over the extended temperature range (?40?C to +125?C). The ADA4851-4W and ADA4851-2W are automotive grade versions, qualified for ?40?C to +125?C operation per AEC-Q100. See the Automotive Products section for more details.Applications Automotive infotainment systems Automotive driver assistance systems Consumer video Professional video Video switchers Active filters Clock buffers

The ADA4858-3 (triple) is a single-supply, high speed current feedback amplifier with an integrated charge pump that eliminates the need for negative supplies to output negative voltages or output a 0 V level for video applications. The 600 MHz, ?3 dB bandwidth and 600 V/?s slew rate make this amplifier well suited for many high speed applications. In addition, its 0.1 dB flatness out to 85 MHz at G = 2, along with its differential gain and phase errors of 0.01% and 0.02? into a 150 ? load, make it well suited for professional and consumer video applications.This triple operational amplifier is designed to operate on supply voltages of 3.3 V to 5 V, using only 42 mA of total quiescent current, including the charge pump. To further reduce the power consumption, it is equipped with a power-down feature that lowers the total supply current to as low as 2.5 mA when the amplifier is not being used. Even in power-down mode, the charge pump can be used to power external components. The maximum output current for external use is 50 mA at ?3 V. The amplifier also has a wide input common-mode voltage range that extends from 1.8 V below ground to 1.2 V below the positive rail at a 5 V supply.The ADA4858-3 is available in a 16-lead LFCSP, and it is designed to work over the extended industrial temperature range of ?40?C to +105?C.ApplicationsProfessional videoConsumer videoImagingActive filtersData Sheet, Rev. A, 05/09

The ADA4941-1 is a low power, low noise differential driver foranalog-to-digital converters (ADCs) up to 18 bits in systemsthat are sensitive to power. The ADA4941-1 is configured in aneasy-to-use, single-ended-to-differential configuration andrequires no external components for a gain of 2 configuration.A resistive feedback network can be added to achieve gains greaterthan 2. The ADA4941-1 provides essential benefits, such as lowdistortion and high SNR that are required for driving highresolution ADCs.With a wide input voltage range (0 V to 3.9 V on a single 5 Vsupply), rail-to-rail output, high input impedance, and a user-adjustablegain, the ADA4941-1 is designed to drive single-supplyADCs with differential inputs found in a variety of low powerapplications, including battery-operated devices and singlesupplydata acquisition systems.The ADA4941-1 is ideal for driving the 16-bit and 18-bitPulSAR? ADCs, such as the AD7687, AD7690, and AD7691.The ADA4941-1 is manufactured on Analog Devices, Inc.,proprietary, second-generation, eXtra fast complementarybipolar (XFCB) process, which enables the amplifier to achieve18-bit performance on low supply currents.The ADA4941-1 is available in a small 8-lead LFCSP as well as astandard 8-lead SOIC and is rated to work over the extendedindustrial temperature range, ?40?C to +125?C. Applications Single-supply data acquisition systems Instrumentation Process control Battery-power systems Medical instrumentation

The ADL5206 is a wide bandwidth, variable gain amplifier (VGA) with digital control (also known as a digital gain amplifier (DGA)) that provides precise gain control, high output third-order intercept (OIP3), and low noise figure over the entire gain range. The excellent OIP3 performance of 39.4 dBm (at 300MHz, 5 V supply, and maximum gain) makes the ADL5206 an excellent gain control device for a variety of receiver applications. For wide input dynamic range applications, the ADL5206 provides a broad 2 dB to 32 dB gain range with a 1 dB step size. The gain is adjustable through multiple gain control and interface options: parallel, serial peripheral interface (SPI), or gain step-up and step-down controls. The ADL5206 can be powered up independently by applying the appropriate logic level to the PWUP pin. The quiescent current of the ADL5206 is typically 112 mA with a 5 V supply. When disabled, the ADL5206 consumes only 8 mA and offers excellent input to output isolation. The gain setting is preserved when the device is disabled. Fabricated on the Analog Devices, Inc., high speed, silicon germanium (SiGe), bipolar complementary metal-oxide semiconductor (BiCMOS) process, the ADL5206 provides precise gain adjustment capabilities with good distortion performance. The ADL5206 amplifier comes in a compact, thermally enhanced, 4 mm ? 4 mm, 20-lead LFCSP and operates over the temperature range of ?40?C to +85?C. Note that throughout the data sheet, multifunction pins, such as CS/GS1/D3, are referred to by the entire pin name or by a single function of the pin. APPLICATIONSDifferential ADC drivers High intermediate frequency (IF) sampling receivers High output power IF amplification DOCSIS FDx upstream amplifier Instrumentation

The ADL5303 is a monolithic logarithmic detector optimized for the measurement of low frequency signal power in fiberoptic systems and offers a large dynamic range in a versatile andeasily used form. Wide measurement range and accuracy are achieved using proprietary design and precise laser trimming.The ADL5303 requires only a single positive supply, VPS, of 5 V. When using low supply voltages, the log slope can be altered tofit the available span. Low quiescent current and chip disablefacilitate use in battery-operated applications.The input current, IPD, flows in the collector of an optimally scaled NPN transistor, connected in a feedback path around alow offset JFET amplifier. The current summing input nodeoperates at a constant voltage, independent of current, with a default value of 0.5 V; this may be adjusted over a wide range. An adaptive biasing scheme is provided for reducing photo-diode dark current at very low light input levels. The VPDB pin applies approximately 0.1 V reverse bias across the photodiode for IPD = 100 pA, rising linearly to 2.0 V of reverse bias at IPD = 10 mA to improve response time at higher power levels. The input pin INPT is flanked by the VSUM guard pins that track the voltage at the summing node. Connecting the exposed pad of the device to the VSUM pins provides a continuous guard to minimize leakage into the INPT pin.The default value of the logarithmic slope at the VLOG output is set by an internal 5 k? resistor. Logarithmic slope can belowered with an external shunt resistor or increased using the buffer and a pair of external feedback resistors. The addition of a capacitor at the VLOG pin provides a simple low-pass filter.The intermediate voltage, VLOG, is buffered in an output stage that can swing to within about 100 mV of ground and the positive supply, VPS, and provides a peak current drive capacity of ?20 mA. An on-board 2 V reference is provided to facilitate the repositioning of the intercept. The incremental bandwidth of a translinear logarithmic amplifier inherently diminishes for small input currents. At IPD =1 nA, the bandwidth of the ADL5303 is approximately 2 kHz increasing in proportion to IPD up to a maximum value of 10 MHz.APPLICATIONS High accuracy optical power measurement Wide range baseband log compression Versatile detector for APC loops

The ADL5304 is a high speed logarithmic converter with fast response and low noise over a 200 dB (1 pA to 10 mA) measurement range. The ADL5304 provides a nominal logarithmic slope of 10 mV/dB (200 mV/decade); other values are easily configured. Logarithmic intercept can be programmed over a wide range with the internal 100 nA current source or externally for log ratio applications.The default intercept value of 3.162 fA places the midpoint of the measurement range of 100 nA at VLOG = 1.5 V.A single positive supply of 5 V is all that is required for operation over a specified 1 pA to 3 mA input range. Dual-supply operation extends the specified input current range to 10 mA.The ADL5304 accepts two current inputs to the logarithmic argument. The numerator input, INUM, flows in the collector of an NPN transistor, connected in a feedback path around a low offset JFET amplifier. The denominator current, IDEN, is treated in the same way, which allows for log ratio operation. The input summing nodes (INUM and IDEN) operate at a constant default voltage of 1.5 V. The VSM1 to VSM4 pins flank the INUM and IDEN inputs to provide a guard voltage to minimize leakage currents.Adaptive photodiode biasing is provided for optical measurements. A monitor current 1.1 times INUM is output at the IMON pin, and an external resistor, RMNTR, at 10 times the photodiode series resistance (RS) applies a voltage across the photodiode that 1st order keeps the internal PD junction at 0 V to minimize dark current.The VLOG output is buffered and can be rescaled through internal gain setting resistors. The internal ILOG varies from ?400 ?A to +400 ?A as INUM changes over 10 decades from 1 pA to 10 mA. This corresponds to 0.5 V to 2.5 V at the VLOG pin in the default configuration shown in Figure 1.Accurate 1.5 V (Pin 1P5V) and 2.0 V (Pin 2VLT) reference outputs allow precise repositioning of the intercept using external resistors.The ADL5304 is available in a 32-lead, 5 mm ? 5 mm LFCSP and specified for operation from ?40?C to +85?C.Applications High accuracy optical power measurement Wide range baseband log compression Versatile detector for high speed APC loops