SM73201 16-Bit, 50 to 250 kSPS, Differential Input, MicroPower ADC |

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16-Bit, 50 to 250 kSPS, Differential Input, MicroPower ADC



The SM73201 is a 16-bit successive-approximation register (SAR) Analog-to-Digital converter (ADC) with a maximum sampling rate of 250 kSPS. The converter features a differential analog input with an excellent common-mode signal rejection ratio of 85 dB, making the SM73201 suitable for noisy environments.

The SM73201 operates with a single analog supply (VA) and a separate digital input/output (VIO) supply. VA can range from +4.5V to +5.5V and VIO can range from +2.7V to +5.5V. This allows a system designer to maximize performance and minimize power consumption by operating the analog portion of the ADC at a VA of +5V while interfacing with a +3.3V controller. The serial data output is binary 2's complement and is SPI compatible.

The performance of the SM73201 is specified over temperature at clock rates of 1 MHz to 5 MHz and reference voltages of +2.5V to +5.5V. The SM73201 is available in a small 10-lead VSSOP package. The high accuracy, differential input, low power consumption, and small size make the SM73201 ideal for direct connection to bridge sensors and transducers in battery operated systems or remote data acquisition applications.


  • Renewable Energy Grade
  • Specified Performance from 50 to 250 kSPS
  • Separate Digital Input/Output Supply
  • True Differential Input
  • External Voltage Reference Range of +0.5V to VA
  • Wide Input Common-Mode Voltage Range of 0V 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 kSPS to 250 kSPS
  • SNR: 93.2 dBc
  • SFDR: 108 dBc
  • THD: −104 dBc
  • Power Consumption
    • 200 kSPS, 5V: 5.3 mW
    • 250 kSPS, 5V: 5.8 mW
    • Power-Down, 5V: 10 μW

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) SNR (dB) THD (Typ) (dB) Rating
SM73201 Order now 16     250     1     SPI     -40 to 85     VSSOP | 10     8.70 | 1ku     5.3     10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)     SAR     Differential         Ext         5.5     0     4.5     5.5     2.7     5.5     0.8     93.2     -106     Catalog