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ChipCap

main-chipcap-rel-hum-sensor

 

The ChipCap series humidity sensor offers a new standard in the field of accurate relative humidity measurement. Based on a capacitive polymer sensing technology, this device offers signal conditioning and temperature compensation for a single SoC (System-on-Chip) solution. The device is very simple to use, fully tested and calibrated for accuracy on delivery—no further calibration is needed.

 

ChipCap can be incorporated into an assembly or finished sensor to meet customer specifications. The measurement is accurate to ± 2% from 20% to 80%RH and ± 3% across the entire humidity range. Long term stability is excellent. The temperature accuracy is ± 1°C from 0°C to +70°C. Dual outputs provide humidity and temperature as 0V to 1V, or 0.5V to 4.5V ratiometric or available with digital output (the ZACwire one-wire interface).

Features

  • Simultaneous relative humidity and temperature outputs
  • Resolution 0.4% RH
  • Factory selectable analog or digital outputs
  • Output configurations available:
    Voltage 0V to 1V
    10 to 90% of VDD
    ZACwireTM digital output (8-bit humidity)
  • Factory calibrated, ready to use
  • Designed for automated assembly
  • Supply voltage: 3.0V to 5.5V
  • Low quiescent current: 0.5mA@5V, 25°C
  • SOP 14 package

Applications

  • HVAC Controls
  • Instrumentation
  • Medical
  • Automotive
  • Appliances and white goods
  • OEM assemblies available

 

Specifications

Relative Humidity

RH Sensor Planar Capacitive Polymer
RH Range 0 to 100% RH
RH Accuracy @ 25°C ±2% from 20% to 80%
±3% from 0% to 20% and 80% to 100%
RH Resolution -0.4% RH

Temperature

Temperature Sensor Integral band gap PTAT
Temperature Scale -50°C to 150°C
Temperature Accuracy ±0.6°C at 25°C (see graph below)
Temperature Resolution 0.2°C

graph

Power Supply

Reverse Polarity Protection 12.5 VDC, 100muA (15VDC, 60s)
Voltage Supply -3 to 5.5 VDC
Current Supply 500 microamps @ 5 VDC, 25°C

Outputs

RH Voltage Output (Ratiometric) Vout = (Vsupply/5)(0.5+(.04*RH)); 0.5 to 4.5V ratiometric; 5VDC nom.
RH Voltage Output (Linear, 0-1V) Vout = 0.01(RH)
RH Digital Output Manchester 8-bit encoded
Temperature Voltage Output (Ratiometric) Vout = (Vsupply/5)(1.5 + (.02*T°C)); 0.5 to 4.5V
ratiometric; 5VDC nom.
Temperature Voltage Output (Linear) Vout = (0.005T °C) +0.25
Temperature Digital Output Manchester 10-bit encoded

Environmental

Operating Temperature Range -40°C to 85°C
Operating RH Range 0 to 100 % RH, non-condensing

Packaging

Packaging SOP-14, SMD
Soldering IR Solder Refl ow, 260°C, 10 sec
Pin Connection 4 Pin; +V, Gnd, RHout, Tout

table


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Descriptions English
ChipCap Fully Calibrated Humidity and Temperature Solution acrobat-reader


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