Overview
The AD7783BRU, produced by Analog Devices Inc., is a complete analog front end designed for low-frequency measurement applications. This 24-bit sigma-delta Analog-to-Digital Converter (ADC) features a fully differential input channel and is optimized for use in various industrial and measurement contexts. The device operates from a single 3 V or 5 V supply and is available in a 16-lead Thin Shrink Small Outline Package (TSSOP).
Key Specifications
| Parameter | Value | Unit | Test Conditions |
|---|---|---|---|
| Output Update Rate | 19.79 | Hz | nom |
| Resolution | 24 Bits (16 Bits p-p) | - | min |
| Input Voltage Range | ±2.56 V or ±160 mV | V | From +2.5 V differential reference input |
| Power Supply | Single 3 V or 5 V | V | - |
| Power Dissipation (at 3 V) | 3.9 | mW | - |
| Package Type | 16-Lead TSSOP | - | - |
| Operating Temperature Range | -40°C to +85°C | °C | - |
| Interface Mode | Master or Slave Mode of Operation | - | SPI®, QSPI™, MICROWIRE™, and DSP-Compatible |
Key Features
- Fully Differential Input Channel: The ADC has one fully differential input channel that can be configured with a gain of 1 or 16, allowing for full-scale input signal ranges of ±2.56 V or ±160 mV from a +2.5 V differential reference input.
- Integrated Current Sources: The AD7783 includes two 200 mA integrated current sources.
- Simple Digital Interface: The device features a read-only digital interface that can operate in master or slave mode, supporting SPI®, QSPI™, MICROWIRE™, and DSP-compatible protocols.
- Low Power Consumption: Normal operation at 1.3 mA @ 3 V and power-down mode at 9 µA.
- Rail-to-Rail Input Buffer and PGA: Includes a rail-to-rail input buffer and a programmable gain amplifier (PGA).
Applications
- Sensor Measurement: Suitable for measuring signals from various sensors such as strain gages and resistance temperature detectors (RTDs).
- Industrial Process Control: Used in industrial process control systems for precise measurement and monitoring).
- Temperature Measurement: Ideal for temperature measurement applications due to its high accuracy and stability).
- Pressure Measurement: Applied in pressure measurement systems requiring high resolution and precision).
- Weigh Scales and Portable Instrumentation: Used in weigh scales and portable instrumentation due to its compact size and low power consumption).
Q & A
- What is the resolution of the AD7783 ADC?
The AD7783 has a 24-bit resolution, with 16 bits peak-to-peak resolution at certain update rates).
- What are the input voltage ranges for the AD7783?
The input voltage ranges are ±2.56 V or ±160 mV from a +2.5 V differential reference input).
- What types of interfaces does the AD7783 support?
The AD7783 supports SPI®, QSPI™, MICROWIRE™, and DSP-compatible interfaces in both master and slave modes).
- What is the power consumption of the AD7783?
The normal power consumption is 1.3 mA @ 3 V, and in power-down mode, it is 9 µA).
- What is the operating temperature range of the AD7783?
The operating temperature range is -40°C to +85°C).
- What package type is the AD7783 available in?
The AD7783 is available in a 16-lead Thin Shrink Small Outline Package (TSSOP)).
- Does the AD7783 have integrated current sources?
Yes, the AD7783 includes two 200 mA integrated current sources).
- What are some common applications of the AD7783?
Common applications include sensor measurement, industrial process control, temperature measurement, pressure measurement, and use in weigh scales and portable instrumentation).
- How does the AD7783 handle high source impedances?
The ADC input can handle significant source impedances due to its high impedance input stage, making it suitable for direct connection to external resistive-type sensors).
- What is the output update rate of the AD7783?
The output update rate is 19.79 Hz).
