Overview
The AD7705BRUZ-REEL, produced by Analog Devices Inc., is a 16-bit, 2-channel, sigma-delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. This device is part of the AD7705 series and is packaged in a 16-lead TSSOP (Thin Shrink Small Outline Package). It is a complete analog front end that can accept low-level input signals directly from a transducer and produce serial digital output, making it ideal for use in smart, microcontroller, or DSP-based systems.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7705BRUZ-REEL |
| Package | 16-Lead TSSOP (0.173, 4.40mm Width) |
| Number of Bits | 16 |
| Number of Analog In Channels | 2 (fully differential) |
| Sampling Rate | 500 sps (samples per second) |
| Polarity | Bipolar, Unipolar |
| Interface | SPI (3-wire serial interface) |
| 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 |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Programmable Gain Front End: Gains from 1 to 128, allowing for flexible signal conditioning.
- Σ-Δ Conversion Technique: Realizes up to 16 bits of no missing codes performance.
- On-Chip Digital Filter: The first notch of the digital filter can be programmed via an on-chip control register, allowing adjustment of the filter cutoff and output update rate.
- Self-Calibration and System Calibration: Options to eliminate gain and offset errors on the part itself or in the system.
- Low Power Dissipation: CMOS construction ensures very low power dissipation, with a power-down mode reducing standby power consumption to 20 μW typ.
- Serial Interface: Configurable for 3-wire operation, compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
- Input Signal Handling: Can handle unipolar and bipolar input signal ranges, such as 0 mV to 10 mV and ±10 mV through ±1.225 V.
Applications
- Smart Systems: Ideal for use in smart systems that require precise analog-to-digital conversion.
- Microcontroller or DSP-Based Systems: Suitable for integration with microcontrollers or DSP processors due to its 3-wire serial interface.
- Low-Frequency Measurement Applications: Designed for applications involving low-frequency signal measurement, such as in industrial automation, medical devices, and data acquisition systems.
- Transducer Interfaces: Can directly accept low-level input signals from transducers, simplifying signal conditioning requirements.
Q & A
- What is the AD7705BRUZ-REEL used for?
The AD7705BRUZ-REEL is a 16-bit, 2-channel sigma-delta ADC used for low-frequency measurement applications, particularly in smart, microcontroller, or DSP-based systems.
- What is the package type of the AD7705BRUZ-REEL?
The AD7705BRUZ-REEL is packaged in a 16-lead TSSOP (Thin Shrink Small Outline Package).
- What are the supply voltage ranges for the AD7705BRUZ-REEL?
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 many analog input channels does the AD7705BRUZ-REEL have?
The AD7705BRUZ-REEL has two fully differential analog input channels.
- What is the sampling rate of the AD7705BRUZ-REEL?
The sampling rate of the AD7705BRUZ-REEL is 500 sps (samples per second).
- Does the AD7705BRUZ-REEL support self-calibration?
Yes, the AD7705BRUZ-REEL supports self-calibration and system calibration to eliminate gain and offset errors.
- What is the power dissipation of the AD7705BRUZ-REEL?
The power dissipation of the AD7705BRUZ-REEL is 1 mW maximum at 3 V supply voltage.
- What is the operating temperature range of the AD7705BRUZ-REEL?
The operating temperature range of the AD7705BRUZ-REEL is -40°C to +85°C.
- Can the AD7705BRUZ-REEL handle bipolar input signals?
Yes, the AD7705BRUZ-REEL can handle bipolar input signal ranges such as ±10 mV through ±1.225 V.
- What type of interface does the AD7705BRUZ-REEL use?
The AD7705BRUZ-REEL uses a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
