Overview
The AD7705BR-REEL, produced by Analog Devices Inc., is a 16-bit, 2-channel sigma-delta analog-to-digital converter (ADC). This component is designed for low-frequency measurement applications and is part of the AD7705 series. It features a programmable gain front end, allowing it to accept low-level input signals directly from transducers and produce serial digital output. The device operates on a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V, making it versatile for various system designs.
Key Specifications
| Parameter | Value | Comments |
|---|---|---|
| Manufacturer | Analog Devices Inc. | |
| Part Number | AD7705BR-REEL | |
| Number of Bits | 16 | No missing codes |
| Number of Channels | 2 | Fully differential analog input channels |
| Supply Voltage | 2.7 V to 3.3 V, 4.75 V to 5.25 V | |
| Power Dissipation | 1 mW maximum @ 3 V | |
| Standby Current | 8 μA maximum | |
| Operating Temperature | -40°C to +85°C | |
| Package | 16-lead SOIC, 16-lead TSSOP | |
| Input Type | Differential | |
| Sampling Rate | Up to 500 samples per second | Dependent on gain and clock frequency |
| Reference Type | External | |
| Data Interface | SPI, DSP, QSPI, MICROWIRE | 3-wire serial interface |
Key Features
- Programmable Gain Front End: Gains from 1 to 128, allowing for direct connection to transducers.
- Low Power Consumption: Maximum power dissipation of 1 mW at 3 V and standby current of 8 μA.
- High Accuracy: ±0.003% nonlinearity and low rms noise (<600 nV).
- Self-Calibration and System Calibration: Options to eliminate gain and offset errors.
- Flexible Input Ranges: Unipolar and bipolar input signal ranges supported.
- Serial Interface: 3-wire serial interface compatible with SPI, DSP, QSPI, and MICROWIRE.
- Low Operating Temperature Range: -40°C to +85°C.
Applications
The AD7705BR-REEL is ideal for various low-frequency measurement applications, including:
- Smart Sensors and Transducers: Directly connects to transducers, reducing the need for additional signal conditioning.
- Microcontroller and DSP-Based Systems: Suitable for systems requiring low power consumption and high accuracy.
- Industrial Automation: Used in applications requiring precise analog-to-digital conversion.
- Medical Devices: Applicable in medical equipment that requires high accuracy and low noise.
Q & A
- What is the resolution of the AD7705BR-REEL?
The AD7705BR-REEL has a resolution of 16 bits with no missing codes.
- How many analog input channels does the AD7705BR-REEL have?
The AD7705BR-REEL features two fully differential analog input channels.
- What are the supply voltage options for the AD7705BR-REEL?
The device can operate on a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V.
- What is the maximum power dissipation of the AD7705BR-REEL?
The maximum power dissipation is 1 mW at 3 V.
- What types of data interfaces does the AD7705BR-REEL support?
The device supports SPI, DSP, QSPI, and MICROWIRE serial interfaces.
- What is the operating temperature range of the AD7705BR-REEL?
The operating temperature range is -40°C to +85°C.
- Does the AD7705BR-REEL support self-calibration?
Yes, the device supports self-calibration and system calibration to eliminate gain and offset errors.
- What are the typical applications of the AD7705BR-REEL?
It is used in smart sensors, microcontroller and DSP-based systems, industrial automation, and medical devices.
- What is the maximum sampling rate of the AD7705BR-REEL?
The maximum sampling rate is up to 500 samples per second, dependent on gain and clock frequency.
- Is the AD7705BR-REEL RoHS compliant?
Yes, the AD7705BR-REEL is lead-free and RoHS compliant.
