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 Compare all products in Precision ADCs (<=10MSPS)

 
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 ADS1130 ADS1131 ADS1231 ADS1232 ADS1234
20     18     18     24     24     24    
0.08     0.08     0.08     0.08     0.08     0.08    
1     1     1     1     2     4    
SPI     SPI     SPI     SPI     SPI     SPI    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 105     -40 to 105    
TSSOP | 16     TSSOP | 16     SOIC | 16     SOIC | 16     TSSOP | 24     TSSOP | 28    
2.95 | 1ku     2.50 | 1ku     2.10 | 1ku     2.50 | 1ku     3.90 | 1ku     4.25 | 1ku    
2.9     2.9     2.9     5     4.3     4.3    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     24TSSOP: 50 mm2: 6.4 x 7.8 (TSSOP | 24)     28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential     Differential    
   
   
   
   
Multiplexed     Multiplexed    
Ext     Ext     Ext     Ext     Ext     Ext    
50/60 Hz Rejection
Oscillator
PGA    
50/60 Hz Rejection
Oscillator    
50/60 Hz Rejection
Oscillator    
50/60 Hz Rejection
Oscillator    
50/60 Hz Rejection
Oscillator
PGA    
50/60 Hz Rejection
Oscillator
PGA    
0.039     0.041     0.041     0.0195     2.5     2.5    
0     0     0     0     0     0    
2.7     2.7     3     3     2.7     2.7    
5.3     5.3     5.3     5.3     5.3     5.3    
2.7     2.7     3     3     2.7     2.7    
5.3     5.3     5.3     5.3     5.3     5.3    
Catalog     Catalog     Catalog