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/8C Drift Over Temperature
·Fast Settling Time
10 V Signal Change: 0.01% in 4.5 ms (Gain = 16)
Gain Change: 0.01% in 5.6 ms (Gain = 16)
·Low Nonlinearity: 60.005% FSR Max (J Grade)
·Excellent DC Accuracy:
Offset Voltage: 0.5 mV Max (C Grade)
Offset Voltage Drift: 3 mV/8C (C Grade)
·TTL-Compatible Digital InputsApplication· Dynamic Range Extension for ADC Systems: A single AD526 in conjunction with a 12-bit ADC can provide 96 dB of dynamic range for ADC systems.
· Gain Ranging Preamps: The AD526 offers complete digital gain control with precise gains in binary steps from 1 to 16.Additional gains of 32, 64, 128 and 256 are possible by cascading two AD526s.Pinout
Specifications
| Single/Dual Supply |
Dual |
| Voltage Supply (Vmax) |
±16.5V |
| Gain Setting Method |
Software |
| Gain Range (min to max) |
16 |
| Bandwidth G=10 (kHz typ) |
350kHz |
| CMRR (dB) |
n/a |
| Vnoise RTI 1-10 Hz Vp-p |
3V p-p |
| Temperature Range |
-40 to +85 |
| Gain Error (%) max |
+0.08% |
| Supply Current |
14mA |
| Vosi (V) |
700V |
DescriptionThe 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 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 military version is available processed to MILSTD 883B, Rev 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.
AD526 Data Sheet
