Overview
The AD7687BCPZRL7, produced by Analog Devices Inc., is a 16-bit, charge redistribution, successive approximation analog-to-digital converter (ADC). This device operates from a single power supply, VDD, ranging from 2.3 V to 5.5 V. It features a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The AD7687 also includes a low noise, wide bandwidth, short aperture delay track-and-hold circuit, making it ideal for various high-performance applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 16 bits |
| Sampling Rate | Up to 250 kSPS |
| Power Supply | 2.3 V to 5.5 V |
| Logic Interface | 1.8 V, 2.5 V, 3 V, or 5 V |
| Input Range | −VREF to +VREF (externally set up to VDD) |
| Power Consumption | 1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS, 1.4 μW at 2.5 V/100 SPS |
| Standby Current | 1 nA |
| Operating Temperature | −40°C to +85°C |
| Package | 10-lead MSOP or 10-lead LFCSP (3 mm × 3 mm) |
Key Features
- Successive approximation architecture with no pipeline delay or latency.
- Low noise, wide bandwidth, short aperture delay track-and-hold circuit.
- SPI-compatible serial interface with daisy-chain capability and optional BUSY indicator.
- Pin-for-pin compatibility with AD7685, AD7686, and AD7688.
- Low power consumption, scaling linearly with throughput, making it suitable for battery-powered applications.
- On-chip conversion clock and internal track-and-hold circuit.
Applications
- Battery-powered equipment.
- Data acquisition systems.
- Instrumentation.
- Medical instruments.
- Process control systems.
Q & A
- What is the resolution of the AD7687 ADC?
The AD7687 is a 16-bit analog-to-digital converter.
- What is the maximum sampling rate of the AD7687?
The AD7687 can sample up to 250,000 samples per second (250 kSPS).
- What is the power supply range for the AD7687?
The AD7687 operates from a single power supply, VDD, ranging from 2.3 V to 5.5 V.
- What types of logic interfaces are supported by the AD7687?
The AD7687 is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO.
- How does the power consumption of the AD7687 scale?
The power consumption of the AD7687 scales linearly with throughput.
- What is the standby current of the AD7687?
The standby current of the AD7687 is 1 nA.
- What are the operating temperature ranges for the AD7687?
The AD7687 operates from −40°C to +85°C.
- In what packages is the AD7687 available?
The AD7687 is available in 10-lead MSOP and 10-lead LFCSP (3 mm × 3 mm) packages.
- Does the AD7687 have any pipeline delay or latency?
No, the AD7687 does not exhibit any pipeline delay or latency.
- Can multiple AD7687 ADCs be daisy-chained?
Yes, multiple AD7687 ADCs can be daisy-chained on a single 3-wire bus using the SPI-compatible serial interface.
