Overview
The AD7706BRU, 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 AD7705/AD7706 family, which are complete analog front ends capable of accepting low-level input signals directly from transducers and producing serial digital output. The AD7706 employs a sigma-delta (Σ-Δ) conversion technique to achieve up to 16 bits of no missing codes performance, making it ideal for applications requiring high precision and low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Number of Inputs | 3 pseudo-differential |
| Voltage Supply | 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 |
| Operating Temperature | -40°C to +85°C |
| Package | 16-lead TSSOP, 16-lead SOIC, 16-lead PDIP |
| Data Interface | SPI, QSPI, MICROWIRE, DSP-compatible |
| Reference Type | External |
| Input Signal Range | 0 mV to 20 mV through 0 V to 2.5 V (with VDD = 5 V and REF = 2.5 V) |
| Bipolar Input Range | ±10 mV through ±1.225 V |
Key Features
- Programmable gain front end with gains from 1 to 128
- 16-bit sigma-delta ADC with no missing codes and ±0.003% nonlinearity
- Low power consumption: 1 mW maximum at 3 V and 8 μA standby current
- Self-calibration and system calibration options to eliminate gain and offset errors
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP
- Ability to buffer the analog input
- Differential reference input
- CMOS construction for low power dissipation
Applications
The AD7706BRU is ideal for use in smart, microcontroller, or DSP-based systems, particularly in applications requiring precise low-frequency measurements. These include:
- Industrial process control
- Medical devices
- Automotive systems
- Environmental monitoring
- Any system requiring high-precision analog-to-digital conversion with low power consumption
Q & A
- What is the number of bits and type of conversion used in the AD7706BRU?
The AD7706BRU uses a 16-bit sigma-delta (Σ-Δ) conversion technique.
- How many input channels does the AD7706BRU have?
The AD7706BRU has three pseudo-differential analog input channels.
- What is the voltage supply range for the AD7706BRU?
The voltage supply range is 2.7 V to 3.3 V or 4.75 V to 5.25 V.
- What is the power dissipation and standby current of the AD7706BRU?
The power dissipation is 1 mW maximum at 3 V, and the standby current is 8 μA maximum.
- What types of packages are available for the AD7706BRU?
The AD7706BRU is available in 16-lead TSSOP, 16-lead SOIC, and 16-lead PDIP packages.
- What kind of data interface does the AD7706BRU support?
The AD7706BRU supports SPI, QSPI, MICROWIRE, and DSP-compatible interfaces.
- Does the AD7706BRU have self-calibration and system calibration options?
Yes, the AD7706BRU features self-calibration and system calibration options to eliminate gain and offset errors.
- What are the typical applications of the AD7706BRU?
The AD7706BRU is typically used in industrial process control, medical devices, automotive systems, environmental monitoring, and other applications requiring high-precision analog-to-digital conversion.
- Can the AD7706BRU handle bipolar input ranges?
Yes, the AD7706BRU can handle bipolar input ranges from ±10 mV through ±1.225 V.
- What is the operating temperature range of the AD7706BRU?
The operating temperature range is -40°C to +85°C.
