Overview
The AD7942BCPZRL7 is a 14-bit, charge redistribution, successive approximation PulSAR® Analog-to-Digital Converter (ADC) produced by Analog Devices Inc. This ADC operates from a single power supply, VDD, ranging from 2.3 V to 5.5 V and features a high-speed conversion rate of up to 250,000 samples per second (250 kSPS). It is designed for low power consumption, making it ideal for battery-powered applications. The AD7942 includes a low noise, wide bandwidth, short aperture delay track-and-hold circuit and does not exhibit any pipeline delay or latency, making it suitable for multiple, multiplexed channel applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Conversion Rate | Up to 250 kSPS |
| Power Supply | 2.3 V to 5.5 V |
| Logic Interface | 1.8 V, 2.5 V, 3 V, or 5 V |
| Analog Input Range | 0 V to VREF (up to VDD) |
| Power Dissipation | 1.25 mW at 2.5 V/100 kSPS, 3.6 mW at 5 V/100 kSPS |
| Standby Current | 1 nA |
| Package | 10-Lead LFCSP (3mm x 3mm) or 10-Lead MSOP |
| Operating Temperature | −40°C to +85°C |
Key Features
- Pseudo differential analog input range from 0 V to VREF (up to VDD)
- No pipeline delay or latency
- Low power consumption: 1.25 μW at 2.5 V/100 SPS
- SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface
- Daisy-chaining capability for multiple ADCs and busy indicator
- Pin-for-pin compatible with the 16-bit AD7685
- Internal conversion clock and track-and-hold circuit
Applications
- Battery-powered equipment
- Data acquisition
- Instrumentation
- Medical instruments
- Process controls
Q & A
- What is the resolution of the AD7942BCPZRL7 ADC?
The AD7942BCPZRL7 has a resolution of 14 bits. - What is the maximum conversion rate of the AD7942BCPZRL7?
The maximum conversion rate is up to 250,000 samples per second (250 kSPS). - What is the power supply range for the AD7942BCPZRL7?
The power supply range is from 2.3 V to 5.5 V. - What types of logic interfaces are supported by the AD7942BCPZRL7?
The ADC supports 1.8 V, 2.5 V, 3 V, or 5 V logic interfaces. - What is the analog input range for the AD7942BCPZRL7?
The analog input range is from 0 V to VREF (up to VDD). - How much power does the AD7942BCPZRL7 consume in standby mode?
The standby current is 1 nA. - In what packages is the AD7942BCPZRL7 available?
The ADC is available in 10-Lead LFCSP (3mm x 3mm) and 10-Lead MSOP packages. - What is the operating temperature range for the AD7942BCPZRL7?
The operating temperature range is from −40°C to +85°C. - Is the AD7942BCPZRL7 compatible with other ADC models?
Yes, it is pin-for-pin compatible with the 16-bit AD7685. - What kind of serial interface does the AD7942BCPZRL7 support?
The ADC supports SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interfaces and daisy-chaining for multiple ADCs.
