Overview
The AD7689CCPZRL7 is a 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 high precision and low power consumption. The AD7689 is designed for use in multichannel, low-power data acquisition systems and features a true 16-bit SAR ADC with no missing codes, a low crosstalk multiplexer, an internal low drift reference, and a temperature sensor. The device operates from a single power supply and uses a simple serial port interface (SPI) for configuration and data transfer.
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) | kSPS |
| 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 |
| Power Supply | 2.3 V to 5.5 V | V |
| Operating Temperature | -40°C to +85°C (standard) -40°C to +125°C (extended temperature range model) | °C |
| Package | 20-lead LFCSP (4mm x 4mm x 0.85mm w/EP) |
Key Features
- 16-bit resolution 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
- Temperature sensor
- Selectable one-pole filter
- Sequencer for continuous channel scanning
- Simple SPI interface for configuration and data transfer
- Low power consumption with power dissipation scaling with throughput
Applications
The AD7689 is suitable for a variety of applications requiring high precision and low power consumption, such as:
- Medical devices and diagnostic equipment
- Industrial automation and control systems
- Data acquisition systems
- Test and measurement equipment
- Aerospace and defense systems
Q & A
- What is the resolution of the AD7689 ADC?
The AD7689 has a 16-bit resolution with no missing codes. - How many channels does the AD7689 support?
The AD7689 supports 8 channels. - What is the maximum throughput of the AD7689?
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 are the input voltage ranges for the AD7689?
The input voltage range is 0 to +VREF for unipolar mode and -VREF/2 to +VREF/2 for bipolar mode. - What is the integral nonlinearity (INL) of the AD7689?
The INL is ±0.4 LSB typical and ±1.5 LSB maximum. - What is the dynamic range of the AD7689?
The dynamic range is 93.8 dB. - What is the operating temperature range of the AD7689?
The standard operating temperature range is -40°C to +85°C, and there is an extended temperature range model that operates up to +125°C. - What package options are available for the AD7689?
The AD7689 is available in a 20-lead LFCSP (4mm x 4mm x 0.85mm w/EP) package. - How does the AD7689 interface with other components?
The AD7689 uses a simple SPI interface for writing to the configuration register and receiving conversion results. - What are some common applications for the AD7689?
The AD7689 is commonly used in medical devices, industrial automation, data acquisition systems, test and measurement equipment, and aerospace and defense systems.
