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Freescale Semiconductor Electronic Components Datasheet

MPR121QR2 Datasheet

Proximity Capacitive Touch Sensor Controller

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MPR121QR2 pdf
Freescale Semiconductor
Data Sheet: Technical Data
An Energy Efficient Solution by Freescale
Document Number: MPR121
Rev. 4, 02/2013
Proximity Capacitive Touch
Sensor Controller
The MPR121 is the second generation sensor controller following the
initial release of the MPR03x series of devices. The MPR121 features an
increased internal intelligence plus Freescale’s second generation
capacitance detection engine. Some major enhancements include an
increased electrode count, a hardware configurable I2C address, an
expanded filtering system with debounce, and completely independent
electrodes with built-in autoconfiguration. The device also features a 13th
simulated electrode which represents the simultaneous charging of all the
electrodes connected together. When used with a touch panel or touch
screen array, the 13th simulated electrode allows a greater near proximity
detection distance and an increased sensing area.
Features
• 1.71V to 3.6V operation
• 29 μA typical run current at 16 ms sampling interval
• 3 μA in scan stop mode current
• 12 electrodes/capacitance sensing inputs in which 8 are
multifunctional for LED driving and GPIO
• Integrated independent autocalibration for each electrode input
• Autoconfiguration of charge current and charge time for each
electrode input
• Separate touch and release trip thresholds for each electrode,
providing hysteresis and electrode independence
• I2C interface, with IRQ Interrupt output to advise electrode status
changes
• 3 mm x 3 mm x 0.65 mm 20 lead QFN package
• -40°C to +85°C operating temperature range
Implementations
• General Purpose Capacitance Detection
• Switch Replacements
• Touch Pads, Touch Wheel, Touch Slide Bar, Touch Screen Panel
• Capacitance Near Proximity Detection
Typical Applications
• PC Peripherals
• MP3 Players
• Remote Controls
• Mobile Phones
• Lighting Controls
Device Name
MPR121QR2
Temperature Range
-40°C to +85°C
ORDERING INFORMATION
Case Number
Touch Pads
2059 (20-Pin QFN)
12-pads
MPR121
Bottom View
20-PIN QFN
CASE 2059-01
Top View
20 19 18 17 16
IRQ
SCL
SDA
ADDR
VREG
1
2
3
4
5
15 ELE7
14 ELE6
13 ELE5
12 ELE4
11 ELE3
6 7 8 9 10
Pin Connections
I2C Address
0x5A - 0x5D
Shipping
Tape & Reel
© 2009-2011, 2013 Freescale Semiconductor, Inc. All rights reserved.


Freescale Semiconductor Electronic Components Datasheet

MPR121QR2 Datasheet

Proximity Capacitive Touch Sensor Controller

No Preview Available !

MPR121QR2 pdf
1 Pin Descriptions
Table 1. Pin Descriptions
Pin No. Pin Name
Description
1 IRQ Open Collector Interrupt Output Pin, active low
2
SCL
I2C Clock
3
SDA
I2C Data
4
ADDR
I2C Address Select Input Pin. Connect the ADDR pin to the VSS, VDD, SDA or SCL line, the resulting I2C addresses
are 0x5A, 0x5B, 0x5C and 0x5D respectively
5 VREG Internal Regulator Node – Connect a 0.1 μF bypass cap to VSS
6 VSS Ground
7 REXT External Resistor – Connect a 75 kΩ 1% resistor to VSS to set internal reference current
8 ELE0 Electrode 0
9 ELE1 Electrode 1
10 ELE2 Electrode 2
11 ELE3 Electrode 3
12 ELE4 Electrode 4
13 ELE5 Electrode 5
14 ELE6 Electrode 6
15 ELE7 Electrode 7
16 ELE8 Electrode 8
17 ELE9 Electrode 9
18 ELE10 Electrode 10
19 ELE11 Electrode 11
20 VDD Connect a 0.1 μF bypass cap to VSS
MPR121
2
Sensors
Freescale Semiconductor, Inc.


Part Number MPR121QR2
Description Proximity Capacitive Touch Sensor Controller
Maker Freescale Semiconductor
Total Page 27 Pages
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