STMPE16M31PXQTR STMicroelectronics, STMPE16M31PXQTR Datasheet - Page 7

• Manufacturer Part Number: STMPE16M31PXQTR
• Description: IC CTLR TOUCHKEY 16CHAN 32-QFN
• Manufacturer: STMicroelectronics
• Series: S-Touch™r
• Type: Capacitive, PWM, Ratio Enginer

Specifications of STMPE16M31PXQTR

• Featured Product: STMPE16M31PX
• Number Of Inputs/keys: 16 Key, Slider
• Data Interface: I²C
• Data Rate/sampling Rate (sps, Bps): 100k, 400k
• Voltage Reference: External
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Supply Voltage: 1.65 V to 1.95 V
• Number Of Channels: 16
• Dimensions: 4 mm L x 4 mm W x 0.8 mm H
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Resolution (bits): -
• Touch Panel Interface: -
• Other names: 497-10738-2

STMPE16M31PX
Figure 3.
Table 3.
1. For small PCBs, it is possible to operate the device with CRef left unconnected. However, without a small
highest and lowest channel
capacitance at this pin, the capacitive sensing operation tends to be noisier. It is recommended that a
capacitor of 10 pF to be connected to this pin.
(Difference between
> 30 pF, < 60 pF
capacitance)
Cmax-Cmin
< 30 pF
<3 0 pF
> 60 pF
Sample application - notebook multimedia bar
Limitations on intrinsic capacitance on PCB / flexi PCB
Doc ID 17058 Rev 2
> 30 pF, < 60 pF
> 30 pF, < 60 pF
< 30 pF
> 60 pF
Cmax
Channel matching capacitance of up
Cref of up to 30 pF required
Cref of up to 30 pF required
PCB optimization required
Matching capacitors
to 25 pF required
Not required
(1)
Pin assignment
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