Overview
The AD7706BRUZ-REEL7, produced by Analog Devices Inc., is a highly integrated analog-to-digital converter (ADC) designed for low-frequency measurement applications. This device features three pseudo-differential analog input channels and is part of the AD7706 series, which employs a sigma-delta (Σ-Δ) conversion technique to achieve up to 16 bits of no missing codes performance. The AD7706 is ideal for use in smart, microcontroller, or DSP-based systems, offering a comprehensive analog front end that can accept low-level input signals directly from transducers and produce serial digital output.
Key Specifications
| Specification | Value |
|---|---|
| Number of Channels | 3 pseudo-differential |
| Resolution | 16 bits, no missing codes |
| Nonlinearity | ±0.003% |
| Programmable Gain | 1 to 128 |
| Input Voltage Range | 0 mV to 20 mV, 0 V to 2.5 V, ±10 mV to ±1.225 V |
| 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 TSSOP |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Three pseudo-differential analog input channels with differential reference input.
- Programmable gain front end with gains from 1 to 128.
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Schmitt-trigger input on SCLK for improved noise immunity.
- Ability to buffer the analog input.
- Self-calibration and system calibration options to eliminate gain and offset errors.
- Low power dissipation with CMOS construction and power-down mode reducing standby power to 20 μW typical.
- Excellent static performance with low rms noise (<600 nV).
Applications
The AD7706 is particularly suited for low-frequency measurement applications in various fields, including:
- Smart sensor systems.
- Microcontroller or DSP-based systems.
- Industrial automation and control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Environmental monitoring systems.
Q & A
- What is the resolution of the AD7706 ADC?
The AD7706 has a resolution of 16 bits with no missing codes.
- What are the input voltage ranges for the AD7706?
The input voltage ranges include 0 mV to 20 mV, 0 V to 2.5 V, and bipolar ranges of ±10 mV through ±1.225 V.
- What is the power dissipation of the AD7706?
The power dissipation is 1 mW maximum at 3 V supply voltage.
- What types of serial interfaces are supported by the AD7706?
The AD7706 supports 3-wire serial interfaces compatible with SPI, QSPI, MICROWIRE, and DSP.
- Does the AD7706 have calibration options?
Yes, the AD7706 features self-calibration and system calibration options to eliminate gain and offset errors.
- What is the operating temperature range of the AD7706?
The operating temperature range is -40°C to +85°C.
- What package types are available for the AD7706?
The AD7706 is available in 16-lead TSSOP, PDIP, and SOIC packages.
- How does the AD7706 handle low-level input signals?
The AD7706 can accept low-level input signals directly from transducers and includes a programmable gain front end to condition these signals.
- Is the AD7706 suitable for battery-powered devices?
Yes, the AD7706 has low power dissipation and a power-down mode that reduces standby power consumption, making it suitable for battery-powered devices.
- What are the typical applications of the AD7706?
The AD7706 is typically used in smart sensor systems, microcontroller or DSP-based systems, industrial automation, medical devices, and environmental monitoring systems.
