Overview
The AD7195BCPZ, 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, enabling direct interface with signals of small amplitude. The device includes ac excitation to remove dc-induced offsets from bridge sensors and can be configured for two differential or four pseudo differential inputs. An on-chip channel sequencer allows for sequential conversion of multiple enabled channels, simplifying communication with the part.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Analog Power Supply (AVDD) | 4.75 to 5.25 | V | |
| Digital Power Supply (DVDD) | 2.7 to 5.25 | V | |
| Current Consumption | 6 | mA | |
| Resolution | 24-bit | ||
| Output Data Rate | 4.7 Hz to 4.8 kHz | ||
| Input Configuration | 2 differential / 4 pseudo differential | ||
| Programmable Gain | 1 to 128 | ||
| RMS Noise | 8.5 nV at 4.7 Hz (G=128) | ||
| Offset Drift | 5 nV/°C | ||
| Gain Drift | 1 ppm/°C | ||
| Package | 32-lead LFCSP | ||
| Operating Temperature Range | -40 to 105 | °C | |
| Interface | 3-wire serial SPI, QSPI™, MICROWIRE™, DSP compatible |
Key Features
- Low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC)
- On-chip low noise gain stage for direct interface with small amplitude signals
- Ac excitation to remove dc-induced offsets from bridge sensors
- Configurable for two differential or four pseudo differential inputs
- On-chip channel sequencer for sequential conversion of multiple channels
- Programmable gain from 1 to 128
- Output data rate adjustable from 4.7 Hz to 4.8 kHz
- Internal or external clock source with simultaneous 50 Hz/60 Hz rejection
- Zero latency feature for applications requiring settled conversions
- 3-wire serial SPI, QSPI™, MICROWIRE™, and DSP compatible interface
Applications
- Weigh scales
- Strain gauge 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?
The AD7195BCPZ has a 24-bit resolution.
- What are the power supply requirements for the AD7195BCPZ?
The device operates with an analog power supply (AVDD) of 4.75 V to 5.25 V and a digital power supply (DVDD) of 2.7 V to 5.25 V.
- What is the current consumption of the AD7195BCPZ?
The AD7195BCPZ consumes a current of 6 mA.
- What are the input configuration options for the AD7195BCPZ?
The device can be configured for two differential or four pseudo differential inputs.
- What is the programmable gain range of the AD7195BCPZ?
The programmable gain range is from 1 to 128.
- What is the output data rate range of the AD7195BCPZ?
The output data rate can be varied from 4.7 Hz to 4.8 kHz.
- Does the AD7195BCPZ support simultaneous 50 Hz/60 Hz rejection?
Yes, the device supports simultaneous 50 Hz/60 Hz rejection.
- What is the operating temperature range of the AD7195BCPZ?
The operating temperature range is from -40°C to 105°C.
- What interface options are available for the AD7195BCPZ?
The device supports 3-wire serial SPI, QSPI™, MICROWIRE™, and DSP compatible interfaces.
- What are some typical applications of the AD7195BCPZ?
Typical applications include weigh scales, strain gauge transducers, pressure measurement, temperature measurement, chromatography, PLC/DCS analog input modules, data acquisition, and medical and scientific instrumentation.
- What package type is the AD7195BCPZ available in?
The AD7195BCPZ is housed in a 32-lead LFCSP package.
