AD7152
Obsolete12-Bit Capacitance-to-Digital Converter (2 Capacitance Input Channels)
Part Details
- Capacitance-to-digital converters
Interfaces to floating sensors
Resolution down to 0.25 fF (that is, up to 12 ENOB)
Linearity: 0.05%
Common-mode (not changing) capacitance up to 5 pF
- Internal clock oscillator
- 2-wire serial interface (I2C-compatible)
- Power
2.7 V to 3.6 V single-supply operation
100 μA current consumption - Operating temperature: −40°C to +85°C
- See data sheet for additional features
The AD7152 / AD7153 are 12-bit sigma-delta (Σ-Δ) capacitance-to-digital converters (CDCs). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high resolution (12-bit no missing codes, up to 12-bit effective resolution) and high linearity (±0.05%). The AD7152 / AD7153 have four capacitance input ranges per operation mode, ±0.25 pF to ±2 pF in differential mode and 0.5 pF to 4 pF in single-ended mode.
The AD7152 / AD7153 can accept up to 5 pF common-mode capacitance (not changing), which can be balanced by a programmable on-chip, digital-to-capacitance converter (CAPDAC).
The AD7153 has one capacitance input channel, while the AD7152 has two channels. Each channel can be configured as single-ended or differential. The AD7152 / AD7153 are designed for floating capacitive sensors.
The AD7152 / AD7153 have a 2-wire, I2C-compatible serial interface. Both devices can operate with a single power supply from 2.7 V to 3.6 V. They are specified over the temperature range of −40°C to +85°C and are available in a 10-lead MSOP.
APPLICATIONS
Automotive, industrial, and medical systems for
- Pressure measurement
- Position sensing
- Level sensing
- Flowmeters
- Humidity sensing
Documentation
Data Sheet 1
Technical Articles 1
Evaluation Design File 1
Frequently Asked Question 1
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
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