ADS1230 20-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales | TI.com

ADS1230 (ACTIVE) 20-Bit, 80SPS, 1-Ch Delta-Sigma ADC for Resistive Bridge Sensors & Weigh Scales

 

Description

The ADS1230 is a precision 20-bit analog-to-digital converter (ADC). With an onboard low-noise programmable gain amplifier (PGA), onboard oscillator, and precision 20-bit delta-sigma ADC, the ADS1230 provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and pressure sensors.

The low-noise PGA has a gain of 64 or 128, supporting a full-scale differential input of ±39mV or ±19.5mV, respectively. The delta-sigma ADC has 20-bit effective resolution and is comprised of a 3rd-order modulator and 4th-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1230 can be clocked by the internal oscillator or an external clock source. Offset calibration is performed on-demand, and the ADS1230 can be put in a low-power standby mode or shut off completely in power-down mode.

All of the features of the ADS1230 are controlled by dedicated pins; there are no digital registers to program. Data are output over an easily-isolated serial interface that connects directly to the MSP430 and other microcontrollers.

The ADS1230 is available in a TSSOP-16 package and is specified from -40°C to +85°C.

Features

  • Complete Front-End for Bridge Sensor
  • Onboard PGA with Gain of 64 or 128
  • Onboard Oscillator
  • RMS Noise:
    40nV at 10SPS (G = 128)
    88nV at 80SPS (G = 128)
  • 18-Bit Noise-Free Resolution
  • Selectable 10SPS or 80SPS Data Rates
  • Simultaneous 50Hz and 60Hz Rejection at 10SPS
  • External Voltage Reference up to 5V for Ratiometric Measurements
  • Simple, Pin-Driven Control
  • Two-Wire Serial Digital Interface
  • Tiny 16-pin TSSOP Package
  • Supply Range: 2.7V to 5.3V
  • -40°C to +85°C Temperature Range
  • APPLICATIONS
    • Weigh Scales
    • Strain Gauges
    • Pressure Sensors
    • Industrial Process Control

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Parametrics

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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) Rating
ADS1230 Order now 20     0.08     1     SPI     -40 to 85     TSSOP | 16     2.95 | 1ku     2.9     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential
Single-Ended    
   
Ext     50/60 Hz Rejection
Oscillator
PGA    
0.039     0     2.7     5.3     2.7     5.3     Catalog    
ADS1130 Order now 18     0.08     1     SPI     -40 to 85     TSSOP | 16     2.50 | 1ku     2.9     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential
Single-Ended    
   
Ext     50/60 Hz Rejection
Oscillator    
0.041     0     2.7     5.3     2.7     5.3     Catalog    
ADS1131 Order now 18     0.08     1     SPI     -40 to 85     SOIC | 16     2.10 | 1ku     2.9     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     Delta-Sigma     Differential
Single-Ended    
   
Ext     50/60 Hz Rejection
Oscillator    
0.041     0     3     5.3     3     5.3     Catalog    
ADS1231 Order now 24     0.08     1     SPI     -40 to 85     SOIC | 16     2.50 | 1ku     5     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     Delta-Sigma     Differential
Single-Ended    
   
Ext     50/60 Hz Rejection
Oscillator    
0.0195     0     3     5.3     3     5.3     Catalog