Overview
The AD7705BRU-REEL7 is a 16-bit, 2-channel sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This integrated circuit is designed for low-frequency measurement applications and serves as a complete analog front end. It features two fully differential analog input channels and a programmable gain front end, making it suitable for direct connection to transducers. The device operates on a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V and is available in a 16-lead TSSOP package.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| 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 | Single supply operation |
| Package | 16-lead TSSOP | Wide body (0.173", 4.40mm Width) |
| Operating Temperature | -40°C to +85°C | |
| Power Dissipation | 1 mW maximum @ 3 V | |
| Standby Current | 8 μA maximum | |
| Input Range | 0 mV to 20 mV, 0 V to 2.5 V, ±20 mV to ±2.5 V | Dependent on reference and supply voltage |
| Gain Settings | 1 to 128 | Programmable gain front end |
| Interface | SPI, QSPI, MICROWIRE, DSP-compatible | 3-wire serial interface |
Key Features
- Programmable Gain Front End: Gains from 1 to 128, allowing for flexible signal conditioning.
- Sigma-Delta Conversion: Provides up to 16 bits of no missing codes performance.
- Low Power Consumption: Maximum power dissipation of 1 mW at 3 V and standby current of 8 μA.
- Self-Calibration and System Calibration: Options to eliminate gain and offset errors.
- Serial Interface: SPI, QSPI, MICROWIRE, and DSP-compatible 3-wire serial interface.
- Input Buffering: Ability to buffer the analog input.
- Low Noise Performance: Less than 600 nV rms noise.
Applications
- Smart and Microcontroller-Based Systems: Ideal for use in systems requiring low-frequency measurement and signal conditioning.
- DSP-Based Systems: Compatible with digital signal processors for advanced signal processing.
- Industrial Automation: Suitable for transducer interfaces and other industrial measurement applications.
- Medical Devices: Used in medical equipment requiring precise and low-noise analog-to-digital conversion.
Q & A
- What is the resolution of the AD7705BRU-REEL7 ADC?
The AD7705BRU-REEL7 has a resolution of 16 bits with no missing codes.
- How many analog input channels does the AD7705BRU-REEL7 have?
The device features two fully differential analog input channels.
- What are the supply voltage options for the AD7705BRU-REEL7?
The device operates on a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V.
- What is the package type of the AD7705BRU-REEL7?
The device is available in a 16-lead TSSOP package.
- What are the gain settings available on the AD7705BRU-REEL7?
The gain can be set from 1 to 128 using the programmable gain front end.
- What types of serial interfaces are supported by the AD7705BRU-REEL7?
The device supports SPI, QSPI, MICROWIRE, and DSP-compatible 3-wire serial interfaces.
- How does the AD7705BRU-REEL7 handle calibration?
The device features self-calibration and system calibration options to eliminate gain and offset errors.
- What is the power dissipation of the AD7705BRU-REEL7?
The maximum power dissipation is 1 mW at 3 V, and the standby current is 8 μA.
- What are the typical applications of the AD7705BRU-REEL7?
The device is ideal for smart and microcontroller-based systems, DSP-based systems, industrial automation, and medical devices.
- What is the operating temperature range of the AD7705BRU-REEL7?
The device operates within a temperature range of -40°C to +85°C.
