Overview
The AD7689ACPZ 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) series and is designed for use in multichannel, low-power data acquisition systems. The AD7689 operates from a single power supply (VDD) and features 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. It also includes a sequencer for continuous channel scanning.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 | Bits |
| Number of Analog Input Channels | 8 | - |
| Sampling Rate | 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 |
| Supply Voltage (Analog and Digital) | 2.3 V to 5.5 V | V |
| Output Format | SERIAL (SPI) | - |
| Signal to Noise Ratio (SNR) | 93.8 dB | dB |
| Integral Nonlinearity (INL) | ±0.4 LSB (typical), ±1.5 LSB (maximum) | LSB |
| Package Type | 20-lead LFCSP (Lead Frame Chip Scale Package) or WLCSP (Wafer Level Chip Scale Package) | - |
| Operating Temperature Range | -40°C to +85°C (standard), -40°C to +125°C (extended temperature range 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
- 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 AD7689ADC?
The AD7689 has a 16-bit resolution.
- How many analog input channels does the AD7689 have?
The AD7689 has 8 analog input channels.
- What is the sampling rate of the AD7689?
The sampling rate is 250 kSPS for VDD = 4.5 V to 5.5 V and 200 kSPS for VDD = 2.3 V to 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 supply voltage range for the AD7689?
The supply voltage range is 2.3 V to 5.5 V for both analog and digital supplies.
- What is the output format of the AD7689?
The output format is serial via an SPI interface.
- What is the signal-to-noise ratio (SNR) of the AD7689?
The SNR 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 types of input configurations are supported by the AD7689?
The AD7689 supports single-ended, differential, and bipolar input configurations.
- Does the AD7689 have an internal reference and temperature sensor?
Yes, the AD7689 includes an internal low drift reference and a temperature sensor.
