Overview
The ADS1244IDGSR is a 24-bit, delta-sigma Analog-to-Digital (A/D) converter produced by Texas Instruments. It is designed to offer excellent performance and very low power consumption, making it well-suited for demanding high-resolution measurements, particularly in portable and space- and power-constrained systems. The converter features a 3rd-order delta-sigma modulator and a digital filter, which provides a low-noise digital output and rejects both 50Hz and 60Hz signals. It operates in a 10-pin VSSOP (DGS) package and supports a wide range of analog and digital supply voltages.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Effective Resolution | 20 bits |
| Sampling Rate | 15 samples per second (sps) |
| Analog Supply Voltage | 2.5V to 5.25V |
| Digital Supply Voltage | 1.8V to 3.6V |
| Differential Input Range | ±5V |
| Integral Nonlinearity (INL) | 0.0002% (typ), 0.0008% (max) |
| Current Consumption | 90µA (typ) |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 10-pin VSSOP (DGS) |
| Power Dissipation | < 270µW (normal operation), < 1µW (Sleep Mode) |
Key Features
- Simple 2-wire serial interface for data retrieval, self-calibration, and Sleep Mode
- Simultaneous 50Hz and 60Hz rejection
- Single-cycle settling and single conversions with Sleep Mode
- Self-calibration at power-up to minimize offset and gain errors
- Well-suited for multichannel systems and easily connects to microcontrollers like the MSP430
- Low power consumption with typical current of 90µA and less than 1µW in Sleep Mode
- Differential and single-ended input capability
Applications
- Hand-held instrumentation
- Portable medical equipment
- Industrial process control
- Weigh scales
Q & A
- What is the resolution of the ADS1244IDGSR?
The ADS1244IDGSR has a 24-bit resolution.
- What is the sampling rate of the ADS1244IDGSR?
The sampling rate is 15 samples per second (sps).
- What are the analog and digital supply voltage ranges for the ADS1244IDGSR?
The analog supply voltage range is 2.5V to 5.25V, and the digital supply voltage range is 1.8V to 3.6V.
- What is the differential input range of the ADS1244IDGSR?
The differential input range is ±5V.
- How does the ADS1244IDGSR handle power consumption during idle periods?
The ADS1244IDGSR can be put into Sleep Mode during idle periods, reducing power dissipation to less than 1µW.
- Can the ADS1244IDGSR be used in multichannel systems?
Yes, multiple ADS1244IDGSRs can be connected together to create a synchronously sampling multichannel measurement system.
- What type of interface does the ADS1244IDGSR use for data communication?
The ADS1244IDGSR uses a simple 2-wire serial interface.
- How does the ADS1244IDGSR reject noise from power line frequencies?
The ADS1244IDGSR features a digital filter that rejects both 50Hz and 60Hz signals.
- What is the operating temperature range of the ADS1244IDGSR?
The operating temperature range is -40°C to 85°C.
- Is the ADS1244IDGSR compatible with microcontrollers?
Yes, it is designed to easily connect to microcontrollers such as the MSP430.
