Overview
The ADS1232IPWR, produced by Texas Instruments, is a precision 24-bit analog-to-digital converter (ADC) designed to provide a complete front-end solution for bridge sensor applications. This device is particularly suited for use in weigh scales, strain gauges, and pressure sensors. It features a low-noise programmable gain amplifier (PGA) and a precision delta-sigma ADC, along with an internal oscillator and temperature sensor for monitoring ambient temperature.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Effective Resolution | 23.5 bits at gain = 1 | |
| Noise-Free Resolution | 19.2 bits at gain = 64 | |
| RMS Noise | 17 nV at 10 SPS (gain = 128), 44 nV at 80 SPS (gain = 128) | |
| Simultaneous 50Hz and 60Hz Rejection | 100 dB | |
| Selectable Gains | 1, 2, 64, 128 | |
| Data Rates | 10 SPS, 80 SPS | |
| Full-Scale Differential Input | ±2.5 V, ±1.25 V, ±39 mV, ±19.5 mV | Dependent on gain setting |
| Supply Voltage Range | 2.7 V to 5.3 V | |
| Operating Temperature Range | –40°C to +105°C | |
| Package Type | TSSOP-24 | |
| Serial Interface | Two-wire serial interface |
Key Features
- Complete front-end for bridge sensors
- Low-noise programmable gain amplifier (PGA) with selectable gains of 1, 2, 64, and 128
- Precision delta-sigma ADC with up to 23.5-bit effective resolution
- Internal oscillator with low drift (±3%) and optional external crystal support
- Selectable 10 SPS or 80 SPS data rates with 50Hz and 60Hz rejection
- Easy ratiometric measurements with external voltage reference up to 5 V
- Two-channel differential input with built-in temperature sensor (ADS1232)
- Simple two-wire serial interface for data output
- Low-power standby mode and power-down mode for energy efficiency
- No digital registers to program, simplifying software development
Applications
- Weigh scales
- Strain gauges
- Pressure sensors
- Other bridge sensor applications requiring high precision and low noise
Q & A
- What is the effective resolution of the ADS1232 at gain = 1?
The ADS1232 has an effective resolution of 23.5 bits at gain = 1.
- What are the selectable gains of the ADS1232?
The ADS1232 has selectable gains of 1, 2, 64, and 128.
- What is the RMS noise of the ADS1232 at 10 SPS and gain = 128?
The RMS noise is 17 nV at 10 SPS and gain = 128.
- Does the ADS1232 support external clocking?
Yes, the ADS1232 can be clocked externally using an oscillator or a crystal, in addition to its internal oscillator.
- What is the operating temperature range of the ADS1232?
The operating temperature range is –40°C to +105°C.
- How many differential input channels does the ADS1232 support?
The ADS1232 supports two differential input channels.
- Does the ADS1232 include a built-in temperature sensor?
Yes, the ADS1232 includes a built-in temperature sensor to monitor ambient temperature.
- What is the supply voltage range for the ADS1232?
The supply voltage range is 2.7 V to 5.3 V.
- How does the ADS1232 handle power management?
The ADS1232 can be put in a low-power standby mode or shut off completely in power-down mode.
- What type of serial interface does the ADS1232 use?
The ADS1232 uses a two-wire serial interface for data output.
