Overview
The AD7705BRUZ is a 16-bit, sigma-delta analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed as a complete analog front end for low-frequency measurement applications. It features two fully differential analog input channels and a differential reference input, making it suitable for a wide range of signal conditioning and conversion tasks. The AD7705BRUZ operates on a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V, ensuring low power dissipation and high accuracy in various measurement systems.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7705BRUZ |
| Package | 16-Lead TSSOP |
| Number of Bits | 16 |
| Sampling Rate | 500 sps |
| Polarity | Bipolar, Unipolar |
| Interface | SPI, QSPI, MICROWIRE, DSP-compatible |
| Number of A/D Converters | 1 |
| Min Supply Voltage | 2.7 V |
| Max Supply Voltage | 3.3 V (or 5.25 V for 5V operation) |
| Power Dissipation | 1 mW maximum @ 3 V |
| Standby Current | 8 μA maximum |
| Input Signal Range | 0 mV to 20 mV, 0 V to 2.5 V, ±10 mV to ±1.225 V |
Key Features
- Programmable Gain Front End: Gains from 1 to 128, allowing for flexible signal conditioning.
- Low Power Consumption: Maximum power dissipation of 1 mW at 3 V and standby current of 8 μA.
- High Accuracy: 16-bit resolution with no missing codes and ±0.003% nonlinearity.
- Serial Interface: 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Self-Calibration and System Calibration: Options to eliminate gain and offset errors.
- Low Noise: Low rms noise (<600 nV).
- Flexible Input Ranges: Handles unipolar and bipolar input signal ranges.
Applications
The AD7705BRUZ is ideal for use in various applications, including:
- Smart Systems: Suitable for integration into smart sensors and measurement systems.
- Microcontroller and DSP-Based Systems: Compatible with microcontrollers and DSP processors for advanced signal processing.
- Low-Frequency Measurement Applications: Designed for applications requiring precise measurement of low-level signals from transducers.
- Industrial Automation: Used in industrial automation for precise measurement and control.
Q & A
- What is the resolution of the AD7705BRUZ?
The AD7705BRUZ has a 16-bit resolution with no missing codes.
- What are the supply voltage ranges for the AD7705BRUZ?
The device operates from a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V.
- What types of input channels does the AD7705BRUZ feature?
The AD7705BRUZ features two fully differential analog input channels and a differential reference input.
- What is the maximum power dissipation of the AD7705BRUZ?
The maximum power dissipation is 1 mW at 3 V.
- Does the AD7705BRUZ support self-calibration?
Yes, the device supports self-calibration and system calibration to eliminate gain and offset errors.
- What is the standby current of the AD7705BRUZ?
The standby current is 8 μA maximum.
- What are the input signal ranges supported by the AD7705BRUZ?
The device can handle input signal ranges from 0 mV to 20 mV, 0 V to 2.5 V, and bipolar ranges of ±10 mV to ±1.225 V.
- Is the AD7705BRUZ compatible with microcontrollers and DSP processors?
Yes, it is designed for use in microcontroller and DSP-based systems with a 3-wire serial interface.
- What is the noise performance of the AD7705BRUZ?
The device has low rms noise (<600 nV).
- In what package is the AD7705BRUZ available?
The AD7705BRUZ is available in a 16-lead TSSOP package.
