1 Features

• 2-channel, 18-bit ADC with analog front-end:

– Dual, simultaneous sampling

– Constant 1MΩ input impedance front-end

• Programmable analog input ranges:

– ±12V, ±10V, ±7V, ±5V, ±3.5V, and ±2.5V

– Single-ended and differential inputs

– ±12V common-mode voltage range

– Input overvoltage protection: Up to ±18V

• User-selectable analog input bandwidth:

– 21kHz and 400kHz

• Integrated low-drift precision references

– ADC reference: 4.096V

– 2.5V reference output for external circuits

• Excellent AC and DC performance at

full-throughput:

– DNL: ±0.5LSB, INL: ±0.8LSB

– SNR: 92dB, THD: –113dB

• Power supply:

– Analog and digital: 5V and 1.8V

– Digital interface: 1.2V to 1.8V

• Temperature range: –40°C to +125°C

2 Applications

• Semiconductor test

• Data acquisition (DAQ)

• Source measure units (SMU)

3 Description

The ADS9212 is a 2-channel data acquisition (DAQ)

system based on a dual, simultaneous-sampling, 18-

bit successive approximation register (SAR) analogto-

digital converter (ADC). The ADS9212 features a

complete analog front-end for each channel with an

input clamp, 1MΩ input impedance, independently

programmable gain amplifier (PGA), programmable

low-pass filter, and an ADC input driver. The device

also features a low-drift, precision reference with

a buffer to drive the ADCs. A high-speed digital

interface supporting 1.2V to 1.8V operation enables

the ADS9212 to be used with high-speed interfaces.

The ADS9212 can be configured to accept ±12V,

±10V, ±7V, ±5V, ±3.5V, and ±2.5V bipolar inputs.

The high input impedance allows direct connection

with sensors and transformers, thus eliminating the

need for external driver circuits. The high performance

and accuracy, along with zero-latency conversions

offered by this device make the ADS9212 designed

for multiple industrial applications.