Overview
The AD7866BRU, produced by Analog Devices Inc., is a dual, simultaneous sampling, 12-bit analog-to-digital converter (ADC) designed for high-performance data acquisition. This device operates from a single 2.7 V to 5.25 V power supply and features a 4-channel analog input multiplexer, track-and-hold amplifiers, and two successive approximation ADCs. It is known for its excellent DC and AC performance, including a 79 dB signal-to-noise ratio (SNR) and a 92 dB spurious-free dynamic range (SFDR).
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Sampling Rate | Up to 1 MSPS |
| Power Supply | 2.7 V to 5.25 V |
| Analog Input Channels | 4-channel multiplexer |
| Signal-to-Noise Ratio (SNR) | 79 dB |
| Spurious-Free Dynamic Range (SFDR) | 92 dB |
| Package Type | 20-lead Thin Shrink Small Outline (TSSOP) |
| Operating Temperature | -40°C to +125°C |
| Power Consumption (at 3 V, 1 MSPS) | Maximum of 3.8 mA |
| Power Consumption (at 5 V, 1 MSPS) | Maximum of 4.8 mA |
Key Features
- Dual, simultaneous sampling ADCs allowing for the conversion of two channels simultaneously.
- High sampling rate of up to 1 MSPS with low power consumption.
- 4-channel analog input multiplexer and track-and-hold amplifiers.
- Excellent DC and AC performance with 79 dB SNR and 92 dB SFDR.
- Flexible power/throughput rate management and no pipeline delays.
- On-chip 2.5 V reference that can be overdriven by an external reference if preferred.
- Compatibility with a wide range of digital signal processors (DSPs) and microcontrollers through its SPI interface.
- Low power operation with a shutdown mode consuming 1 μA maximum.
Applications
- Industrial automation and control.
- Test and measurement equipment.
- Medical instrumentation.
- Power management systems.
- Portable and battery-powered devices.
Q & A
- What is the resolution of the AD7866BRU ADC?
The AD7866BRU has a resolution of 12 bits.
- What is the maximum sampling rate of the AD7866BRU?
The maximum sampling rate is up to 1 MSPS.
- What is the power supply range for the AD7866BRU?
The device operates from a single 2.7 V to 5.25 V power supply.
- How many analog input channels does the AD7866BRU have?
The AD7866BRU features a 4-channel analog input multiplexer.
- What is the signal-to-noise ratio (SNR) of the AD7866BRU?
The SNR is 79 dB.
- Is the AD7866BRU still in active production?
No, the AD7866BRU is an obsolete product and is no longer in active production.
- What are some alternative models to the AD7866BRU?
Alternative models include the AD7641, AD7980 (16-bit, 1 MSPS and 500 kSPS versions).
- What is the operating temperature range of the AD7866BRU?
The operating temperature range is -40°C to +125°C.
- How does the AD7866BRU manage power consumption?
The device features flexible power/throughput rate management, allowing power consumption to be reduced by increasing the SCLK frequency or entering sleep mode during conversions.
- Is the AD7866BRU compatible with DSPs and microcontrollers?
Yes, it is compatible through its SPI interface.
