Overview
The AD7689BCBZ-RL7 is a 16-bit, 8-channel, 250 kSPS PulSAR (Successive Approximation Register) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is designed for use in multichannel, low-power data acquisition systems. It operates from a single power supply and includes a true 16-bit SAR ADC with no missing codes, a low crosstalk multiplexer, an internal low drift reference, a temperature sensor, and a selectable one-pole filter. The AD7689 also features a simple serial port interface (SPI) for configuration and data transfer.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Number of Channels | 8 | - | - | - |
| Throughput | 0 | 250 | 250 | kSPS (VDD = 4.5 V to 5.5 V) |
| Throughput | 0 | 200 | 200 | kSPS (VDD = 2.3 V to 4.5 V) |
| Integral Nonlinearity (INL) | -1.5 | -0.4 | 1.5 | LSB |
| Dynamic Range | - | - | - | 93.8 dB |
| Analog Input Voltage Range (Unipolar) | 0 | - | +VREF | V |
| Analog Input Voltage Range (Bipolar) | -VREF/2 | - | +VREF/2 | V |
| Temperature Range | -40 | - | +85 | °C |
| Package Type | - | - | - | 20-Ball WLCSP (2.39mm x 2.39mm) |
Key Features
- 16-bit resolution with no missing codes
- 8-channel multiplexer with options for unipolar single-ended, differential (with or without ground sense), and pseudobipolar inputs
- Internal low drift reference (selectable 2.5 V or 4.096 V) and buffer
- Temperature sensor and selectable one-pole filter
- Simple serial port interface (SPI) for configuration and data transfer
- Low power consumption with power dissipation scaling with throughput
- Extended temperature range model available with specifications guaranteed up to +125°C
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 in scientific and research environments
- Aerospace and defense applications requiring high reliability and precision
- Automotive systems, especially those requiring robust temperature performance
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 throughput of the AD7689?
The throughput is up to 250 kSPS for VDD = 4.5 V to 5.5 V and up to 200 kSPS for VDD = 2.3 V to 4.5 V.
- What types of input configurations are supported by the AD7689?
The AD7689 supports unipolar single-ended, differential (with or without ground sense), and pseudobipolar input configurations.
- Does the AD7689 have an internal reference?
Yes, the AD7689 includes an internal low drift reference that is selectable between 2.5 V and 4.096 V.
- What is the temperature range of the AD7689?
The specified performance temperature range is from -40°C to +85°C, with an extended model available up to +125°C.
- What package type is the AD7689 available in?
The AD7689 is available in a 20-Ball WLCSP (2.39mm x 2.39mm) package.
- How does the AD7689 interface with other devices?
The AD7689 uses a simple serial port interface (SPI) for writing to the configuration register and receiving conversion results.
- Is there an evaluation kit available for the AD7689?
Yes, the EVAL-AD7689EDZ is a fully featured evaluation kit available for the AD7689.
- What are some typical applications of the AD7689?
The AD7689 is suitable for medical devices, industrial automation, data acquisition systems, aerospace and defense, and automotive systems.
