MPR084 Datasheet, PDF (1/39 Pages) Freescale Semiconductor, Inc – Proximity Capacitive Touch Sensor Controller

Freescale Semiconductor
Technical Data
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Proximity Capacitive Touch
Sensor Controller
MPR084 OVERVIEW
The MPR084 is an Inter-Integrated Circuit Communication (I²C) driven
Capacitive Touch Sensor Controller, optimized to manage an 8-touch pad
capacitive array. The device can accommodate a wide range of
implementations through 3 output mechanisms, and many configurable
options.
Features
• 1.8 V to 3.6 V operation
• 41 µA average supply current with 1 s response time
• 2 µA low Standby Current
• Variable low power mode response time (32 ms – 4 s)
• Rejects unwanted multi-key detections from EMI events such as PA
bursts or user handling
• Ongoing pad analysis and detection is not reset by EMI events
• Data is buffered in a FIFO for shortest access time
• IRQ output advises when FIFO has data
• System can set interrupt behavior as immediate after event, or
program a minimum time between successive interrupts
• Current touched pad position is always available on demand for
polling-based systems
• Sounder output can be enabled to generate key-click sound when pad
is touched
• Two hardware selectable I²C addresses allowing two devices on a
single I²C bus
• Configurable real-time auto calibration
• 5 mm x 5 mm x 1 mm 16 lead QFN package
• -40°C to +85°C operating temperature range
Implementations
• Control Panels
• Switch Replacements
• Touch Pads
Typical Applications
• Appliances
• PC Peripherals
• Access Controls
• MP3 Players
• Remote Controls
• Mobile Phones
Device Name
MPR084Q
MPR084EJ
ORDERING INFORMATION
Temperature Range
Case Number
-40°C to +85°C
1679
(16-Lead QFN)
948F
(16-Lead TSSOP)
Touch Pads
8-pads
MPR084
Rev 5, 11/2008
MPR084
Capacitive Touch
Sensor Controller
Bottom View
16-LEAD QFN
CASE 1679
16-LEAD TSSOP
CASE 948F
Top View
ATTN ¹
IRQ 2
VDD 3
VSS 4
16 15 14 13
MPR084
12 E5
11 E6
10 E7
9 _E8
5 678
1
ATTN
2
IRQ
3
VDD
4
VSS
5
SCL
6
SDA
7
AD0
8
SOUNDER
MPR084
16
E1
15
E2
14
E3
13
E4
12
E5
11
E6
10
E7
9
E8
Figure 1. Pin Connections
This document contains a product under development. Freescale Semiconductor reserves the right to change or
discontinue this product without notice.
© Freescale Semiconductor, Inc., 2007, 2008. All rights reserved.
Preliminary