HTU21P Ver la hoja de datos (PDF) - Unspecified
Número de pieza
componentes Descripción
fabricante
HTU21P Datasheet PDF : 21 Pages
| |||
HTU21D(F) Sensor
Digital Relative Humidity sensor with Temperature output
Wiring Considerations and Signal Integrity
Carrying the SCK and DATA signal parallel and in close proximity (e.g. in wires) for more than 10 cm may result
in cross talk and loss of communication.
This may be resolved by routing VDD and/or GND between the two data signals and/or using shielded cables.
Furthermore, slowing down SCK frequency will possibly improve signal integrity.
Power supply pins (VDD, GND) must be bypassed with a 100nF capacitor if wires are used. Capacitor should
be placed as close as possible to the sensor.
ESD (ElectroStatic Discharge)
ESD immunity is qualified according to:
JEDEC JESD22-A114 method (Human Body Model at ±4kV) for pads & open window
JEDEC JESD22-A115 method (Machine Model ±200V)
ESDA ESD-STM5.3.1-1999 and AEC-Q100-011 (charged device model, 750V corner pins, 500V other
pins)
Latch-up immunity is provided at a force current of ±100mA with Tamb=25°C according to JEDEC JESD78. For
exposure beyond named limits the sensor need additional protection circuit.
INTERFACE SPECIFICATION
N°
1
2
3
4
5
6
PAD
Function
DATA
GND
NC
NC
VDD
SCK
Comment
Data bit-stream
Ground
Must be left unconnected
Must be left unconnected
Supply Voltage
Selector for RH or Temp
Ground or unconnected
Typical application circuit, including pull-up resistor Rp and decoupling of VDD and GND by a capacitor.
Power Pins (VDD, GND)
The supply voltage of HTU21D(F) sensors must be in the range of 1.5VDC - 3.6VDC. Recommended supply
voltage is 3VDC (regulated).
However the typical application circuit includes a pull-up resistor R on data wire and a 100nF decoupling
capacitor between VDD and GND, placed as close as possible to the sensor.
HPC199_3 HTU21D(F) Sensor Datasheet
www.meas-spec.com
8/21
October 2013
Share Link: 