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.