Description
Data Sheet 20-Bit, 1.8 MSPS/1 MSPS/500 kSPS, Easy Drive, Differential SAR ADCs AD4020/AD4021/AD4022 .
The AD4020/AD4021/AD4022 are high accuracy, high speed, low power, 20-bit, Easy Drive, precision successive approximation register (SAR) analog-to-di.
Features
* Easy Drive Greatly reduced input kickback Input current reduced to 0.5 μA/MSPS Enhanced acquisition phase, ≥77% of cycle time at 1 MSPS First conversion accurate, no latency or pipeline delay Input span compression for single-supply operation Fast conversion allows low SPI clock rates Input overvolt
Applications
* Automated test equipment Machine automation Medical equipment Battery-powered equipment Precision data acquisition systems Instrumentation and control systems
FUNCTIONAL BLOCK DIAGRAM
2.5V TO 5V 1.8V
VREF VREF/2
0
VREF VREF/2
0
10µF REF
VDD
AD4020/AD4021/AD4022
HIGH-Z MODE
IN+
20-BIT SAR ADC