1 Features

• 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 V_A
• Zero-Power Track Mode with 0-µsec Wake-up Delay
• Wide Input Common-mode Voltage Range of 0 V to V_A
• 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 (V_A) and a separate digital input/output (V_IO) supply. V_A can range from 4.5 V to 5.5 V and V_IO 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 V_A 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.

1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application Schematic