Overview
The AD7706BNZ, produced by Analog Devices Inc., is a precision 16-bit Sigma-Delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. This device is part of the AD7705/AD7706 family, which serves as a complete analog front end for systems requiring high accuracy and low power consumption.
The AD7706BNZ features three pseudo-differential analog input channels, making it suitable for a wide range of applications, including those involving transducers and strain gauges. It operates from a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V, and it is known for its low power dissipation, consuming less than 1 mW at 3 V supplies and 1 MHz master clock.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits, no missing codes |
| Accuracy | ±0.003% |
| RMS Noise | <600 nV |
| Supply Voltage | 2.7 V to 3.3 V or 4.75 V to 5.25 V |
| Power Consumption | <1 mW at 3 V and 1 MHz master clock |
| Standby Current | <8 μA |
| Input Channels | Three pseudo-differential analog input channels |
| Gain Settings | 1, 2, 4, 8, 16, 32, 64, and 128 |
| Input Signal Ranges | Unipolar: 0 mV to 20 mV, 0 V to 2.5 V; Bipolar: ±20 mV to ±2.5 V |
| Operating Temperature | -40°C to 85°C |
| Package | 16-Lead PDIP, TSSOP, SOIC Wide |
Key Features
- Low Power Consumption: The AD7706BNZ consumes less than 1 mW at 3 V supplies and 1 MHz master clock, making it ideal for low-power systems.
- Programmable Gain: The device features programmable gain settings of 1, 2, 4, 8, 16, 32, 64, and 128, allowing it to accept input signals directly from transducers or strain gauges.
- High Accuracy: It offers excellent static performance with ±0.003% accuracy and low RMS noise (<600 nV).
- On-Chip Calibration: The device includes on-chip calibration options to eliminate zero-scale and full-scale errors, as well as temperature drift effects.
- Serial Interface: The AD7706BNZ features a 3-wire serial interface, reducing the number of interconnect lines and opto-couplers required in isolated systems.
- Differential Reference Input: It includes a differential reference input, enhancing the flexibility of input signal ranges.
Applications
- Smart and Microcontroller-Based Systems: Ideal for use in smart systems, microcontrollers, or DSP-based applications due to its low power consumption and high accuracy.
- Transducer and Strain Gage Measurements: Suitable for direct connection to transducers and strain gauges, eliminating the need for additional signal conditioning.
- Industrial Automation: Used in various industrial automation applications requiring precise analog-to-digital conversion.
- Medical Devices: Applicable in medical devices where low noise and high accuracy are critical.
Q & A
- What is the resolution of the AD7706BNZ?
The AD7706BNZ has a resolution of 16 bits with no missing codes.
- What are the supply voltage ranges for the AD7706BNZ?
The device operates from a single supply voltage of 2.7 V to 3.3 V or 4.75 V to 5.25 V.
- How much power does the AD7706BNZ consume?
The AD7706BNZ consumes less than 1 mW at 3 V supplies and 1 MHz master clock.
- What are the gain settings available on the AD7706BNZ?
The device offers programmable gain settings of 1, 2, 4, 8, 16, 32, 64, and 128.
- What is the operating temperature range of the AD7706BNZ?
The operating temperature range is -40°C to 85°C.
- What types of input channels does the AD7706BNZ have?
The AD7706BNZ features three pseudo-differential analog input channels.
- Does the AD7706BNZ support on-chip calibration?
Yes, the device includes on-chip calibration options to eliminate gain and offset errors.
- What is the typical standby current of the AD7706BNZ?
The typical standby current is less than 8 μA.
- What are the common applications of the AD7706BNZ?
The AD7706BNZ is commonly used in smart systems, microcontroller or DSP-based applications, transducer and strain gage measurements, industrial automation, and medical devices.
- How does the AD7706BNZ interface with other components?
The device features a 3-wire serial interface, which can be configured for 3-wire operation, reducing the number of interconnect lines and opto-couplers required.
