Description
The ADS1232 and ADS1234 are precision 24-bit analog-to-digital converters (ADCs). With an onboard, low-noise programmable gain amplifier (PGA), precision delta-sigma ADC and internal oscillator, the ADS1232/4 provide a complete front-end solution for bridge sensor applications including weigh scales, strain gauges and pressure sensors.
The input multiplexer accepts either two (ADS1232) or four (ADS1234) differential inputs. The ADS1232 also includes an onboard temperature sensor to monitor ambient temperature. The onboard, low-noise PGA has a selectable gain of 1, 2, 64, or 128 supporting a full-scale differential input of ±2.5V, ±1.25V, ±39mV, or ±19.5mV. The delta-sigma ADC has 23.5-bit effective resolution and is comprised of a 3rd-order modulator and 4th-order digital filter.
View full Description in Datasheet
Features
- Complete Front-End for Bridge Sensors
- Up to 23.5 Effective Bits
- Onboard, Low-Noise PGA
- RMS Noise:
17nV at 10SPS (PGA = 128)
44nV at 80SPS (PGA = 128)
- 19.2-Bit Noise-Free Resolution at Gain = 64
- Over 100dB Simultaneous 50Hz and 60Hz Rejection
- Flexible Clocking:
Low-Drift Onboard Oscillator (±3%) Optional External Crystal
- Selectable Gains of 1, 2, 64, and 128
- Easy Ratiometric Measurements—External Voltage Reference up to 5V
- Selectable 10SPS or 80SPS Data Rates
- Two-Channel Differential Input with Built-In Temperature Sensor (ADS1232)
- Four-Channel Differential Input (ADS1234)
- Simple Serial Digital Interface
- Supply Range: 2.7V to 5.3V
- -40°C to +105°C Temperature Range
- APPLICATIONS
- Weigh Scales
- Strain Gauges
- Pressure Sensors
- Industrial Process Control
View All Features in Datasheet
Parametrics
| |
ADS1130 |
ADS1131 |
ADS1230 |
ADS1231 |
ADS1232 |
ADS1234 |
| Resolution(Bits) |
18 |
18 |
20 |
24 |
24 |
24 |
| Sample Rate (max) |
80SPS |
80SPS |
80SPS |
80SPS |
80SPS |
80SPS |
| # Input Channels |
1 |
1 |
1 |
1 |
2 |
4 |
| Interface |
Serial SPI Interface |
Serial |
Serial SPI Interface |
SPI |
Serial SPI Interface |
Serial SPI Interface |
| INL(Max)(+/-LSB) |
0.0006 |
|
|
|
|
|
| INL (+/-)(Max)(%) |
0.00001 |
0.0008 |
|
|
|
|
| Power Consumption(Typ)(mW) |
2.9 |
5 |
2.9 |
5 |
4.3 |
4.3 |
| Architecture |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
Delta-Sigma |
| Analog Voltage AV/DD(Min)(V) |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
| Analog Voltage AV/DD(Max)(V) |
5.3 |
5.3 |
2.3 |
5.3 |
5.3 |
5.3 |
| Operating Temperature Range(°C) |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 85 |
-40 to 105 |
-40 to 105 |
| Digital Supply(Min)(V) |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
| Digital Supply(Max)(V) |
5.3 |
5.3 |
5.3 |
5.3 |
5.3 |
5.3 |
|
