Overview
The AD7689ACPZRL7 is a 16-bit, 8-channel analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7682/AD7689 family, which features charge redistribution successive approximation register (SAR) architecture. It is designed for use in multichannel, low-power data acquisition systems and operates from a single power supply, VDD. The AD7689 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 device is housed in a 20-lead lead frame chip scale package (LFCSP) and supports operation from −40°C to +85°C, with an extended temperature range model available up to +125°C.
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 (Unipolar) | 0 to +VREF | V |
| Analog Input Voltage Range (Bipolar) | −VREF/2 to +VREF/2 | V |
| Integral Nonlinearity (INL) | ±0.4 LSB (typical), ±1.5 LSB (maximum) | LSB |
| Dynamic Range | 93.8 dB | dB |
| Operating Temperature Range | −40°C to +85°C (standard) −40°C to +125°C (extended) | °C |
| Package Type | 20-lead LFCSP |
Key Features
- 16-bit resolution with no missing codes
- 8-channel low crosstalk multiplexer with configurable inputs (single-ended, differential, bipolar)
- 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 serial port interface (SPI) for configuration and data transfer
- Low power consumption with power dissipation scaling with throughput
Applications
- Data acquisition systems
- Instrumentation
- Process control
- Seismic data acquisition systems
- Mobile communications (e.g., GPS)
- Power line monitoring
Q & A
- What is the resolution of the AD7689ADC?
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. - What types of analog input configurations are supported?
The AD7689 supports single-ended (with or without ground sense), differential, and bipolar 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 operating temperature range of the AD7689?
The standard operating temperature range is −40°C to +85°C, with an extended range up to +125°C available. - What package type is the AD7689 available in?
The AD7689 is available in a 20-lead lead frame chip scale package (LFCSP). - 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. - What are some common applications of the AD7689?
Common applications include data acquisition systems, instrumentation, process control, seismic data acquisition, mobile communications, and power line monitoring. - Is there an evaluation kit available for the AD7689?
Yes, the EVAL-AD7689EDZ is a fully featured evaluation kit available for the AD7689.
