Overview
The AD7195BCPZ-RL7, produced by Analog Devices Inc., is a low noise, complete analog front end designed for high precision measurement applications. It features a 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC) with an on-chip low noise gain stage, allowing direct interface of small amplitude signals. The device includes ac excitation to remove dc-induced offsets from bridge sensors and supports both differential and pseudo-differential input configurations. The AD7195BCPZ-RL7 is housed in a 32-lead LFCSP package and operates with a 5 V analog power supply and a digital power supply ranging from 2.7 V to 5.25 V.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 24 |
| Sampling Rate | 4.7 Hz to 4.8 kHz |
| Polarity | Bipolar |
| Interface | 3-wire serial SPI, QSPI™, MICROWIRE™, and DSP compatible |
| Number of Channels | 2 differential or 4 pseudo-differential |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| Current Consumption | 6 mA |
| Temperature Range | –40°C to +105°C |
| Package | 32-lead LFCSP |
Key Features
- Low noise, 24-bit sigma-delta (Σ-Δ) ADC with on-chip low noise gain stage.
- Ac excitation for removing dc-induced offsets from bridge sensors.
- Configurable for two differential or four pseudo-differential inputs.
- On-chip channel sequencer for sequential conversion of enabled channels.
- Programmable gain (1 to 128).
- Internal or external clock source with a 4.92 MHz on-chip clock option.
- Two digital filter options with zero latency feature for settled conversions.
- Simultaneous 50 Hz/60 Hz rejection.
Applications
- Weigh scales
- Strain gage transducers
- Pressure measurement
- Temperature measurement
- Chromatography
- PLC/DCS analog input modules
- Data acquisition
- Medical and scientific instrumentation
Q & A
- What is the resolution of the AD7195BCPZ-RL7 ADC?
The AD7195BCPZ-RL7 has a 24-bit resolution. - What is the sampling rate range of the AD7195BCPZ-RL7?
The sampling rate can be varied from 4.7 Hz to 4.8 kHz. - What types of input configurations are supported by the AD7195BCPZ-RL7?
The device supports both two differential and four pseudo-differential input configurations. - What is the power supply requirement for the AD7195BCPZ-RL7?
The device operates with an analog power supply of 4.75 V to 5.25 V and a digital power supply of 2.7 V to 5.25 V. - What is the current consumption of the AD7195BCPZ-RL7?
The device consumes a current of 6 mA. - What is the temperature range for the AD7195BCPZ-RL7?
The operating temperature range is –40°C to +105°C. - What package type is the AD7195BCPZ-RL7 available in?
The device is housed in a 32-lead LFCSP package. - Does the AD7195BCPZ-RL7 support external clock sources?
Yes, the device can use either the internal 4.92 MHz clock or an external clock or crystal. - What are some of the key applications of the AD7195BCPZ-RL7?
Key applications include weigh scales, strain gage transducers, pressure measurement, temperature measurement, chromatography, PLC/DCS analog input modules, data acquisition, and medical and scientific instrumentation. - Does the AD7195BCPZ-RL7 have any noise rejection features?
Yes, it includes simultaneous 50 Hz/60 Hz rejection features.
