Overview
The ADS1224IPWR from Texas Instruments is a 4-channel, 24-bit, delta-sigma analog-to-digital (A/D) converter. It is designed to offer excellent performance and low power consumption, making it suitable for demanding, high-resolution measurements in portable systems and other space-saving, power-constrained applications. The device features a delta-sigma modulator followed by a digital filter and includes an input multiplexer that allows selection between four separate differential input channels. A pin-selectable, high-impedance input buffer is also available to increase the input impedance. The ADS1224IPWR supports a simple 2-wire serial interface for control and data retrieval, and it includes an on-chip temperature sensor. It operates with analog and digital supplies ranging from 2.7V to 5.5V and has a low current consumption of 300µA, with power consumption typically less than 1mW in 3V operation and less than 1µW during Standby mode.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Channels | 4 | - |
| Resolution | 24 bits | - |
| Data Rate | 120 SPS (with fCLK = 2MHz) | SPS |
| Integral Nonlinearity (INL) | 0.0003% (typ), 0.0015% (max) | % of FSR |
| Differential Input Range | ±5V | V |
| Analog Supply Voltage | 2.7V to 5.5V | V |
| Digital Supply Voltage | 2.7V to 5.5V | V |
| Current Consumption | 300µA | µA |
| Operating Temperature Range | −40°C to +85°C | °C |
| Package Type | TSSOP-20 | - |
Key Features
- Delta-sigma modulator and digital filter for high-resolution measurements
- Input multiplexer with four differential channels
- Pin-selectable, high-impedance input buffer
- Self-calibrating and supports single conversions with Standby mode
- Simple 2-wire serial interface for control and data retrieval
- On-chip temperature sensor
- Low power consumption: typically less than 1mW in 3V operation and less than 1µW during Standby mode
- Supports connection of multiple devices for synchronously sampling multichannel measurement systems
Applications
- Hand-held instrumentation
- Portable medical equipment
- Industrial process control
- Weigh scales
Q & A
- What is the resolution of the ADS1224IPWR?
The ADS1224IPWR has a resolution of 24 bits.
- What is the data rate of the ADS1224IPWR with a 2MHz clock frequency?
The data rate is 120 SPS with a 2MHz clock frequency.
- What is the differential input range of the ADS1224IPWR?
The differential input range is ±5V.
- What are the supply voltage ranges for the ADS1224IPWR?
The analog and digital supply voltages range from 2.7V to 5.5V.
- How much current does the ADS1224IPWR typically consume?
The device typically consumes 300µA.
- What is the operating temperature range of the ADS1224IPWR?
The operating temperature range is −40°C to +85°C.
- Does the ADS1224IPWR support single conversions with a Standby mode?
Yes, it supports single conversions with a Standby mode to reduce power consumption.
- How does the ADS1224IPWR handle data retrieval?
Data retrieval is handled through a simple 2-wire serial interface. Data is shifted out MSB first after DRDY/DOUT goes low.
- Can multiple ADS1224IPWR devices be connected for multichannel measurements?
Yes, multiple devices can be connected together to create a synchronously sampling multichannel measurement system.
- What type of package does the ADS1224IPWR come in?
The device comes in a TSSOP-20 package.
