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AD7156

Features: Ultralow powerPower supply voltage: 1.8 V to 3.6 VOperation power supply current: 70 A typicalPower-down current: 2 A typicalFast response timeConversion time: 10 ms per channelWake-up time from serial interface: 300 sAdaptive environmental compensation2 capacitance input channels Sensor...

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SeekIC No. : 004269910 Detail

AD7156: Features: Ultralow powerPower supply voltage: 1.8 V to 3.6 VOperation power supply current: 70 A typicalPower-down current: 2 A typicalFast response timeConversion time: 10 ms per channelWake-up tim...

AD7156 Data Sheet

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Part Number:
AD7156
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

Ultralow power
Power supply voltage: 1.8 V to 3.6 V
Operation power supply current: 70 A typical
Power-down current: 2 A typical
Fast response time
Conversion time: 10 ms per channel
Wake-up time from serial interface: 300 s
Adaptive environmental compensation
2 capacitance input channels Sensor capacitance (CSENS): 0 pF up to 13 pF Sensitivity up to 3 fF
2 modes of operation
Standalone with fixed settings
Interfaced to a microcontroller for user-defined settings
2 detection output flags
2-wire serial interface (I2C-compatible)
Operating temperature: −40°C to +85°C
10-lead LFCSP package (3 mm * 3 mm * 0.8 mm)




Application

Buttons and switches
Proximity sensing
Contactless switching
Position detection
Level detection
Portable products




Pinout

AD7156 Diagram




Specifications

Resolution (Bits) 12bit
T-Put Rate 100SPS
# Chan 2
Supply V Single(+1.8),Single(+2.5),Single(+2.7),Single(+3),Single(+3.3),Single(+3.6)
Pwr Diss 306W
Sleep Pwr Diss 3.6W
Ain Range 0.5 pF,1 pF,2 pF,4 pF
Ref Int/Ext Int
Product Description Ultralow Power, 1.8 V, 3 mm * 3 mm, 2-Channel Capacitance Converter


Parameter Rating
Positive Supply Voltage VDD to GND
Voltage on Any Input or Output to GND
ESD Rating
ESD Association Human Body Model, S5.1
Field-Inducted Charged Device Model
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
LFCSP Package
JA, Thermal Impedance to Air
JC, Thermal Impedance to Case
Reflow Soldering (Pb-Free)
Peak Temperature
Time at Peak Temperature		 −0.3 V to +3.9 V
0.3 V to VDD + 0.3 V
4 kV
500 V
−40 to +85
65 to +150
150
49/W
3/W
260(0/−5)
10 sec to 40 sec





Description

The AD7156 delivers a complete signal processing solution for capacitive sensors, featuring an ultralow power converter with fast response time.
The AD7156 uses an Analog Devices, Inc., capacitance-to-digital converter (CDC) technology, which combines features important for interfacing to real sensors, such as high input sensitivity and high tolerance of both input parasitic ground capacitance and leakage current.

The integrated adaptive threshold algorithm compensates for any variations in the sensor capacitance due to nvironmental factors like humidity and temperature or due to changes in the dielectric material over time.

By default, the AD7156 operates in standalone mode using the fixed power-up settings and indicates detection on two digital outputs. Alternatively, the AD7156 can be interfaced to a micro-controller via the serial interface, the internal egisters can be programmed with user-defined settings, and the data and status can be read from the part.

The AD7156 operates with a 1.8 V to 3.6 V power supply. It is specified over the temperature range of −40°C to +85°C.






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