AD526

a FEATURES Digitally Programmable Binary Gains from 1 to 16 Two-Chip Cascade Mode Achieves Binary Gain from 1 to 256 Gain Error: 0.01% Max, Gain = 1, 2, 4 (C Grade) 0.02% Max, Gain = 8, 16 (C Grade) 0.5 ppm/؇ C Drift Over Temperature Fast Settling Time 10 V Signal Change: 0.01% in 4.5 ␮ s (Gain = 16) Gain Change: 0.01% in 5.6 ␮s (Gain = 16) Low Nonlinearity: ؎0.005% FSR Max (J Grade) Excellent DC Accuracy: Offset Voltage: 0.5 mV Max (C Grade) Offset Voltage Drift: 3 ␮V/؇ C (C Grade) TTL-Compatible Digital Inputs PRODUCT DESCRIPTION Software Programmable Gain Amplifier AD526 PIN CONFIGURATION DIG GND 1 NULL 2 VIN 3 NULL 4 16 15 14 A1 A0 CS CLK TOP VIEW ANALOG GND 2 5 (Not to Scale) 12 A2 AD526 13 ANALOG GND 1 6 –VS 7 VOUT SENSE 8 11 10 9 B +VS VOUT FORCE The AD526 is a single-ended, monolithic software programmable gain amplifier (SPGA) that provides gains of 1, 2, 4, 8 and 16. It is complete, including amplifier, resistor network and TTL-compatible latched inputs, and requires no external components. Low gain error and low nonlinearity make the AD526 ideal for precision instrumentation applications requiring programmable gain. The small signal bandwidth is 350 kHz at a gain of 16. In addition, the AD526 provides excellent dc precision. The FETinput stage results in a low bias current of 50 pA. A guaranteed maximum input offset voltage of 0.5 mV max (C grade) and low gain error (0.01%, G = 1, 2, 4, C grade) are accomplished using Analog Devices’ laser trimming technol...