Overview
The ADS1205IRGET is a high-performance, two-channel delta-sigma (∆Σ) modulator produced by Texas Instruments. This device operates from a single +5V supply and features more than 98dB dynamic range, making it ideal for high-resolution measurement applications. The ADS1205 is designed for use in industrial environments, with differential inputs suitable for direct connection to transducers. It can achieve 16-bit analog-to-digital (A/D) conversion with no missing codes, and an effective resolution of 14 bits can be obtained with a digital filter bandwidth of 40kHz at a modulator rate of 10MHz.
Key Specifications
| Parameter | Min | Max | Units | |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| DC Accuracy (INL) | -1.4 | ±3 | - | LSB |
| Full-scale Differential Range | - | ±2.5 | - | V |
| Gain Error | -0.01 | ±0.5 | - | % FSR |
| Input Offset Error | -1.2 | ±3 | - | mV |
| Power-supply Rejection Ratio (PSRR) | - | 78 | - | dB |
| Analog Supply Voltage (AVDD) | 4.5 | 5 | 5.5 | V |
| Buffer I/O Supply Voltage (BVDD) | 2.7 | - | 5.5 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
Key Features
- Two independent delta-sigma modulators
- 16-bit resolution and 14-bit linearity
- ±2.5V input range at 2.5V
- Internal reference voltage with 2% accuracy
- Gain error of 0.5%
- On-chip 20MHz oscillator with selectable internal or external clock
- Two input reference buffers
- QFN-24 (4x4) package
Applications
- Motor Control
- Current Measurement
- Industrial Process Control
- Instrumentation
- Resolver
Q & A
- What is the dynamic range of the ADS1205? The ADS1205 has a dynamic range of more than 98dB.
- What is the resolution of the ADS1205? The ADS1205 can achieve 16-bit resolution with no missing codes.
- What is the operating temperature range of the ADS1205? The operating temperature range is from -40°C to +85°C.
- What is the input range of the ADS1205? The input range is ±2.5V at 2.5V.
- Does the ADS1205 have an internal oscillator? Yes, it has an on-chip 20MHz oscillator.
- Can the ADS1205 use an external clock? Yes, it allows for selectable internal or external clock.
- What is the package type of the ADS1205? The ADS1205 is available in a QFN-24 (4x4) package.
- What are some common applications of the ADS1205? Common applications include motor control, current measurement, industrial process control, instrumentation, and resolver applications.
- What is the power-supply rejection ratio (PSRR) of the ADS1205? The PSRR is 78 dB.
- What is the gain error of the ADS1205? The gain error is ±0.5%.
