1 Features
1• 16-bit Resolution With No Missing Codes
• Ensured Performance from 50 to 250 kSPS
• ±0.003% Signal Span Accuracy
• Separate Digital Input/Output Supply
• True Differential Input
• External Voltage Reference Range of 0.5 V to VA
• Zero-Power Track Mode with 0-μsec Wake-up
Delay
• Wide Input Common-mode Voltage Range of 0 V
to VA
• SPI/QSPI™/MICROWIRE™ Compatible Serial
Interface
• Operating Temperature Range of −40°C to +85°C
• Small VSSOP-10 Package
• Key Specifications
– Conversion Rate 50 to 250 kSPS
– DNL +0.8 / −0.5 LSB
– INL ±0.8 LSB
– Offset Error Temp Drift 2.5 μV/°C
– Gain Error Temp Drift 0.3 ppm/°C
– SNR 93.2 dBc
– THD − 104 dBc
– Power Consumption
– 10 kSPS, 5 V 0.24 mW
– 200 kSPS, 5 V 5.3 mW
– 250 kSPS, 5 V 5.8 mW
– Power-Down, 5 V 10 μW

2 Applications
• Direct Sensor Interface
• I/O Modules
• Data Acquisition
• Portable Systems
• Motor Control
• Medical Instruments
• Instrumentation and Control Systems

3 Description
The ADC161S626 is a 16-bit successive-
approximation register (SAR) Analog-to-Digital converter (ADC) with a maximum sampling rate of
250 kSPS. The ADC161S626 has a minimum signal
span accuracy of ±0.003% over the temperate range
of −40°C to +85°C. The converter features a differential analog input with an excellent common-
mode signal rejection ratio of 85 dB, making the
ADC161S626 suitable for noisy environments.
The ADC161S626 operates with a single analog
supply (VA) and a separate digital input/output (VIO)
supply. VA can range from 4.5 V to 5.5 V and VIO can
range from 2.7 V to 5.5 V. This allows a system
designer to maximize performance and minimize
power consumption by operating the analog portion of
the ADC at a VA of 5 V while interfacing with a 3.3-V
controller. The serial data output is binary 2's
complement and is SPI compatible.
The performance of the ADC161S626 is ensured
over temperature at clock rates of 1 MHz to 5 MHz
and reference voltages of 2.5 V to 5.5 V. The ADC161S626 is available in a small 10-lead VSSOP
package. The high accuracy, differential input, low
power consumption, and small size make the
ADC161S626 ideal for direct connection to bridge sensors and transducers in battery operated systems
or remote data acquisition applications.