Overview
The ADS1224IPWTG4 is a 4-channel, 24-bit, delta-sigma analog-to-digital (A/D) converter produced by Texas Instruments. This device is designed to offer excellent performance and low power consumption, making it well-suited for demanding, high-resolution measurements in portable systems and other space-saving and power-constrained applications. The ADS1224 features a delta-sigma modulator followed by a digital filter and includes an input multiplexer that allows selection between four separate differential input channels. It also includes a pin-selectable, high-impedance input buffer to increase input impedance.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 24 Bits | |
| Data Rate | 120 SPS (with fCLK = 2MHz) | |
| Integral Nonlinearity (INL) | 0.0003% (typ), 0.0015% (max) | % of FSR |
| Differential Input Range | ±5V | |
| Analog Supply Voltage | 2.7V to 5.5V | |
| Digital Supply Voltage | 2.7V to 5.5V | |
| Current Consumption | 300µA (typ) | |
| Operating Temperature Range | −40°C to +85°C | |
| Package | TSSOP-20 |
Key Features
- 4-channel differential input with input multiplexer
- Pin-selectable, high-impedance input buffer
- Self-calibrating
- Simple 2-wire serial interface
- On-chip temperature sensor
- Single conversions with standby mode for low power consumption
- Low current consumption: 300µA (typ)
- Supports 2.7V to 5.5V analog and digital supplies
- Low noise performance with Sinc3 digital filter
Applications
- Hand-held instrumentation
- Portable medical equipment
- Industrial process control
- Weigh scales
Q & A
- What is the resolution of the ADS1224IPWTG4?
The ADS1224IPWTG4 has a resolution of 24 bits.
- What is the data rate of the ADS1224IPWTG4 with a 2MHz clock frequency?
The data rate is 120 SPS with a 2MHz clock frequency.
- What is the differential input range of the ADS1224IPWTG4?
The differential input range is ±5V.
- What are the supply voltage ranges for the ADS1224IPWTG4?
The analog and digital supply voltage ranges are both 2.7V to 5.5V.
- How does the input buffer affect the input impedance of the ADS1224IPWTG4?
The input buffer, when enabled, increases the input impedance to 1.2 GΩ.
- What is the typical current consumption of the ADS1224IPWTG4?
The typical current consumption is 300µA.
- Does the ADS1224IPWTG4 support single conversions with standby mode?
Yes, it supports single conversions with standby mode to reduce power consumption.
- How does the ADS1224IPWTG4 handle temperature measurements?
The ADS1224IPWTG4 includes an on-chip temperature sensor that can be selected through the TEMPEN pin.
- What type of digital filter does the ADS1224IPWTG4 use?
The ADS1224IPWTG4 uses a Sinc3 digital filter to improve noise performance.
- How does the settling time work after changing the input multiplexer or buffer?
After changing the input multiplexer, buffer, or temperature sensor, the digital filter settles, and the DRDY/DOUT line is held high until fully settled data is ready.
