Overview
The ADS1244IDGST is a 24-bit, delta-sigma Analog-to-Digital (A/D) converter produced by Texas Instruments. It is designed for high-resolution measurements, particularly in portable and power-constrained systems. The converter features a 3rd-order delta-sigma modulator and a digital filter, providing excellent performance with very low power consumption. It is packaged in a 10-pin VSSOP (DGS) package and operates over a temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 24 bits | |
| Data Rate | 15 samples per second | sps |
| Integral Nonlinearity (INL) | 0.0002% (typ), 0.0008% (max) | % FSR |
| Analog Supply Voltage | 2.5V to 5.25V | V |
| Digital Supply Voltage | 1.8V to 3.6V | V |
| Differential Input Range | ±5V | V |
| Current Consumption | 90µA (typ) | µA |
| Power Dissipation (Normal Operation) | < 270µW | µW |
| Power Dissipation (Sleep Mode) | < 1µW | µW |
| Package Type | VSSOP (DGS) | |
| Pins | 10 | |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- 20-bit effective resolution
- Low power consumption: 90µA typical
- Simple 2-wire serial interface
- Simultaneous 50Hz and 60Hz rejection
- Single-cycle settling and self-calibration
- Single conversions with sleep mode to reduce power
- Well-suited for multichannel systems and easy connection to microcontrollers like the MSP430
- Differential input range of ±5V
- High accuracy with 0.0002% INL (typ) and 0.0008% INL (max)
Applications
- Hand-held instrumentation
- Portable medical equipment
- Industrial process control
- Weigh scales
Q & A
- What is the resolution of the ADS1244IDGST?
The ADS1244IDGST has a 24-bit resolution.
- What is the data rate of the ADS1244IDGST?
The data rate is 15 samples per second.
- What is the typical current consumption of the ADS1244IDGST?
The typical current consumption is 90µA.
- What are the operating voltage ranges for the analog and digital supplies?
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 ADS1244IDGST?
The differential input range is ±5V.
- Does the ADS1244IDGST support simultaneous 50Hz and 60Hz rejection?
Yes, it does support simultaneous 50Hz and 60Hz rejection.
- Can the ADS1244IDGST be used in multichannel systems?
Yes, it is well-suited for multichannel systems and can be connected together for synchronous sampling.
- How does the ADS1244IDGST reduce power consumption during idle periods?
The ADS1244IDGST can be shut down into Sleep Mode between measurements to dramatically reduce power dissipation.
- What is the typical power dissipation in normal operation and sleep mode?
The typical power dissipation is less than 270µW in normal operation and less than 1µW in sleep mode.
- What are some common applications of the ADS1244IDGST?
Common applications include hand-held instrumentation, portable medical equipment, industrial process control, and weigh scales.
