Overview
The AD7689BCPZ is a high-performance, 16-bit, 8-channel analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the PulSAR (Pulse Width Modulation Successive Approximation Register) ADC family, known for its low power consumption and high accuracy. The AD7689 is designed for use in multichannel, low power data acquisition systems and features a charge redistribution successive approximation register (SAR) architecture. It operates from a single power supply and includes a variety of integrated components such as a low crosstalk multiplexer, an internal low drift reference, a temperature sensor, and a selectable one-pole filter.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 | Bits |
| Number of Channels | 8 | - |
| Throughput | 250 | kSPS (VDD = 4.5 V to 5.5 V) 200 kSPS (VDD = 2.3 V to 4.5 V) |
| Analog Input Voltage Range | 0 to +VREF (Unipolar) -VREF/2 to +VREF/2 (Bipolar) | V |
| Integral Nonlinearity (INL) | ±0.4 LSB (Typical) ±1.5 LSB (Maximum) | LSB |
| Dynamic Range | 93.8 dB | dB |
| Package Type | 20-lead LFCSP (4mm x 4mm x 0.85mm w/EP) | - |
| Operating Temperature Range | -40°C to +85°C (Standard) -40°C to +125°C (Extended Temperature Model) | °C |
Key Features
- True 16-bit SAR ADC with no missing codes
- 8-channel low crosstalk multiplexer with options for single-ended, differential, or bipolar inputs
- Internal low drift reference (selectable 2.5 V or 4.096 V) and buffer
- Integrated temperature sensor
- Selectable one-pole filter
- Sequencer for continuous channel scanning
- Simple serial port interface (SPI) for configuration and data transfer
- Low power consumption with power dissipation scaling with throughput
Applications
- Data acquisition systems
- Seismic data acquisition systems
- Instrumentation
- Process control
- Mobile communications (e.g., GPS)
- Power line monitoring
Q & A
- What is the resolution of the AD7689BCPZ ADC?
The AD7689BCPZ has a resolution of 16 bits.
- How many channels does the AD7689BCPZ support?
The AD7689BCPZ supports 8 channels.
- What is the maximum throughput of the AD7689BCPZ?
The maximum throughput is 250 kSPS when VDD is between 4.5 V and 5.5 V, and 200 kSPS when VDD is between 2.3 V and 4.5 V.
- What types of input configurations are supported by the AD7689BCPZ?
The AD7689BCPZ supports single-ended, differential, and bipolar input configurations.
- Does the AD7689BCPZ have an internal reference voltage?
- What is the operating temperature range of the AD7689BCPZ?
The standard operating temperature range is -40°C to +85°C, with an extended temperature model available up to +125°C.
- What package type is the AD7689BCPZ available in?
The AD7689BCPZ is available in a 20-lead LFCSP (4mm x 4mm x 0.85mm w/EP) package.
- How does the AD7689BCPZ interface with other components?
The AD7689BCPZ uses a simple serial port interface (SPI) for writing to the configuration register and receiving conversion results.
- What are some common applications of the AD7689BCPZ?
- Is the AD7689BCPZ suitable for low power applications?
