AT42QT1070-MMH Atmel, AT42QT1070-MMH Datasheet - Page 35

• Manufacturer Part Number: AT42QT1070-MMH
• Description: IC TOUCH SENSOR 7KEY 20-VQFN
• Manufacturer: Atmel
• Type: Capacitiver

Specifications of AT42QT1070-MMH

• Number Of Inputs/keys: 7 Key (Comms), 5 Key (Standalone)
• Data Interface: I²C
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Supply Voltage: 1.8 V to 5.5 V
• Dimensions: 3 mm L x 3 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: -
• Data Rate/sampling Rate (sps, Bps): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

9596A–AT42–10/10
3
4
5
6
Wiring and Parts ..................................................................................... 13
I2C-compatible Communications (Comms Mode Only) ...................... 15
Setups ...................................................................................................... 18
Specifications.......................................................................................... 24
3.1
3.2
3.3
3.4
4.1
4.2
4.3
4.4
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.15
6.1
6.2
6.3
6.4
Rs Resistors .....................................................................................................13
LED Traces and Other Switching Signals ........................................................13
PCB Cleanliness...............................................................................................14
Power Supply ...................................................................................................14
I2C-compatible Protocol ...................................................................................15
I2C-compatible Address ...................................................................................15
Data Read/Write ...............................................................................................15
SDA, SCL .........................................................................................................17
Introduction.......................................................................................................18
Address 0: Chip ID ...........................................................................................19
Address 1: Firmware Version ...........................................................................19
Address 2: Detection Status .............................................................................20
Address 3: Key Status ......................................................................................20
Address 4 – 17: Key Signal ..............................................................................20
Address 18 – 31: Reference Data ....................................................................20
Address 32 – 38: Negative Threshold (NTHR).................................................21
Address 39 – 45: Averaging Factor/Adjacent Key Suppression (AVE/AKS) ....21
Address 46 – 52: Detection Integrator (DI).......................................................21
Address 53: FastOutDI/Max Cal/Guard Channel .............................................22
Address 54: Low Power (LP) Mode..................................................................22
Address 55: Max On Duration ..........................................................................23
Address 56: Calibrate .......................................................................................23
Address 57: RESET .........................................................................................23
Absolute Maximum Specifications....................................................................24
Recommended Operating Conditions ..............................................................24
DC Specifications .............................................................................................24
Power Consumption Measurements ................................................................25
4.1.1
4.1.2
4.3.1
4.3.2
Protocol........................................................................................15
Signals .........................................................................................15
Writing Data to the Device ...........................................................15
Reading Data From the Device ...................................................16
AT42QT1070
35