Overview
The AD7706BRZ, produced by Analog Devices Inc., is a highly integrated analog-to-digital converter (ADC) designed for low-frequency measurement applications. This device is part of the AD7705/AD7706 family, which offers complete analog front ends capable of accepting low-level input signals directly from transducers and producing serial digital output. The AD7706BRZ features three pseudo-differential analog input channels and employs a Σ-Δ (sigma-delta) conversion technique to achieve up to 16 bits of no missing codes performance.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 3 pseudo-differential |
| Resolution | 16 bits |
| Input Signal Range | 0 mV to 20 mV, 0 V to 2.5 V (unipolar); ±20 mV to ±2.5 V (bipolar) |
| Supply Voltage | 2.7 V to 3.3 V or 4.75 V to 5.25 V |
| Power Dissipation | 1 mW maximum @ 3 V |
| Standby Current | 8 μA maximum |
| Package Type | 16-Lead SOIC Wide |
| Operating Temperature | −40°C to +85°C |
| Interface | 3-wire serial interface (SPI-, QSPI-, MICROWIRE-, and DSP-compatible) |
Key Features
- Programmable gain front end with gains from 1 to 128
- Differential reference input
- Self-calibration and system calibration options to eliminate gain and offset errors
- CMOS construction for very low power dissipation
- Power-down mode reducing standby power consumption to 20 μW typical
- Ability to buffer the analog input
- Schmitt-trigger input on SCLK
- Adjustable digital filter cutoff and output update rate via on-chip control register
Applications
The AD7706BRZ is ideal for use in smart, microcontroller, or DSP-based systems. It is particularly suited for applications requiring precise low-frequency measurement, such as industrial control systems, medical devices, and data acquisition systems.
Q & A
- What is the resolution of the AD7706BRZ?
The AD7706BRZ has a resolution of 16 bits. - How many analog input channels does the AD7706BRZ have?
The AD7706BRZ features three pseudo-differential analog input channels. - What are the supply voltage ranges for the AD7706BRZ?
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 is the power dissipation of the AD7706BRZ?
The power dissipation is 1 mW maximum at 3 V. - What types of calibration does the AD7706BRZ support?
The device supports self-calibration and system calibration to eliminate gain and offset errors. - What is the operating temperature range of the AD7706BRZ?
The operating temperature range is −40°C to +85°C. - What interface types does the AD7706BRZ support?
The device supports 3-wire serial interfaces compatible with SPI, QSPI, MICROWIRE, and DSP. - What are the package options for the AD7706BRZ?
The device is available in a 16-Lead SOIC Wide package. - Can the AD7706BRZ handle bipolar input signals?
Yes, the device can handle bipolar input signal ranges of ±20 mV through ±2.5 V. - How does the AD7706BRZ reduce power consumption in standby mode?
In power-down mode, the standby power consumption is reduced to 20 μW typical.
