Overview
The ADS1234IPWR is a precision, 24-bit analog-to-digital converter (ADC) produced by Texas Instruments. It is part of the ADS123x series, designed to provide a complete front-end solution for bridge sensor applications. This ADC features a low-noise programmable gain amplifier (PGA), a precision delta-sigma ADC, and an internal oscillator, making it ideal for measuring low signals from bridge sensors such as those used in weigh scales, strain gauges, and pressure sensors.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24-bit |
| Effective Resolution at Gain = 1 | 23.5 bits |
| Noise-Free Resolution at Gain = 64 | 19.2 bits |
| Selectable Gains | 1, 2, 64, 128 |
| RMS Noise at 10 SPS, Gain = 128 | 17 nV |
| RMS Noise at 80 SPS, Gain = 128 | 44 nV |
| 50-Hz and 60-Hz Rejection | 100 dB |
| Data Rates | 10 SPS, 80 SPS |
| Supply Voltage Range | 2.7 V to 5.3 V |
| Operating Temperature Range | –40°C to +105°C |
| Package Type | TSSOP-28 |
| Number of Pins | 28 |
| Input Type | Four-channel differential input |
| Serial Interface | Two-wire serial interface |
Key Features
- Complete front-end for bridge sensors
- Low-noise programmable gain amplifier (PGA)
- Selectable gains of 1, 2, 64, and 128
- Flexible clocking options: low-drift internal oscillator or optional external crystal
- Selectable data rates of 10 SPS or 80 SPS
- 100-dB simultaneous 50-Hz and 60-Hz rejection
- Easy ratiometric measurements with external voltage reference up to 5 V
- Four-channel differential input
- Two-wire serial interface for data output
- Low-power standby mode and power-down mode
- No digital registers to program; simple pin-driven control
Applications
- Weigh scales
- PLC weight modules
- Pressure sensors
- Strain gauges
Q & A
- What is the resolution of the ADS1234IPWR?
The ADS1234IPWR has a 24-bit resolution.
- What are the selectable gains of the ADS1234IPWR?
The selectable gains are 1, 2, 64, and 128.
- What are the data rates supported by the ADS1234IPWR?
The data rates supported are 10 SPS and 80 SPS.
- What is the operating temperature range of the ADS1234IPWR?
The operating temperature range is –40°C to +105°C.
- What type of package does the ADS1234IPWR come in?
The ADS1234IPWR comes in a TSSOP-28 package.
- How many differential input channels does the ADS1234IPWR have?
The ADS1234IPWR has four differential input channels.
- What is the supply voltage range for the ADS1234IPWR?
The supply voltage range is 2.7 V to 5.3 V.
- Does the ADS1234IPWR have an internal temperature sensor?
No, the ADS1234IPWR does not have an internal temperature sensor, unlike the ADS1232 model.
- How is the data output from the ADS1234IPWR?
Data is output over a two-wire serial interface.
- Can the ADS1234IPWR be clocked externally?
