ADI AD526BD

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 FET input 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 technology. To provide flexibility to the system designer, the AD526 can be operated in either latched or transparent mode. The force/sense configuration preserves accuracy when the output is connected to remote or low impedance loads. The AD526 is offered in one commercial (0°C to +70°C) grade, J, and three industrial grades, A, B and C, which are specified from -40°C to +85°C. The S grade is specified from -55°C to +125°C. The J grade is supplied in a 16-lead plastic DIP, and the other grades are offered in a 16-lead hermetic side-brazed ceramic DIP.

• Digitally Programmable Binary Gains from 1 to 16
• Two-Chip Cascade Mode Achieves Binary Gain from 1 to 256
• Gain Error: 0.07% 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: 0.07% in 4.5 μs (Gain = 16); Gain Change: 0.01% in 5.6 μs (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 μV/°C (C Grade)
• TTL-Compatible Digital Inputs

• Dynamic Range Extension for ADC Systems
• Gain Ranging Preamps