AD7147
PRODUCTIONCapTouch™ Programmable Controller for Single-Electrode Capacitance Sensors
- Part Models
- 9
- 1ku List Price
- Starting From $1.55
Part Details
- Register map is compatible with the AD7142
- On-chip RAM to store calibration data
- SPI-compatible (serial-peripheral-interface-compatible) serial interface (AD7147)
- I2C-compatible serial interface (AD7147-1)
- On-chip automatic calibration logic
Automatic compensation for environmental changes
Automatic adaptive threshold and sensitivity levels - See datasheet for additional features
The AD7147 CapTouch™ controller is designed for use with capacitance sensors implementing functions such as buttons, scroll bars, and wheels. The sensors need only one PCB layer, enabling ultrathin applications.
The AD7147 is an integrated CDC with on-chip environmental calibration. The CDC has 13 inputs channeled through a switch matrix to a 16-bit, 250 kHz sigma-delta (Σ-Δ) converter. The CDC is capable of sensing changes in the capacitance of the external sensors and uses this information to register a sensor activation. By programming the registers, the user has full control over the CDC setup.
High resolution sensors require minor software to run on the host processor.
The AD7147 is designed for single electrode capacitance sensors (grounded sensors). There is an active shield output to minimize noise pickup in the sensor.
The AD7147 has on-chip calibration logic to compensate for changes in the ambient environment. The calibration sequence is performed automatically and at continuous intervals as long as the sensors are not touched. This ensures that there are no false or non-registering touches on the external sensors due to a changing environment.
The AD7147 has an SPI-compatible serial interface, and the AD7147-1 has an I2C®-compatible serial interface. Both parts have an interrupt output, as well as a GPIO. There is a VDRIVE pin to set the voltage level for the serial interface independent of VCC.
The AD7147 is available in a 24-lead, 4 mm × 4 mm LFCSP and operates from a 2.6 V to 3.6 V supply. The operating current consumption in low power mode is typically 26 μA for 13 sensors.
APPLICATIONS
- Cell phones
- Personal music and multimedia players
- Smart handheld devices
- Television, A/V, and remote controls
- Gaming consoles
- Digital still cameras
Documentation
Data Sheet 1
Application Note 3
Technical Articles 1
Product Highlight 1
Evaluation Design File 1
Frequently Asked Question 1
Product Highlight 1
Device Drivers 1
Analog Dialogue 5
Rarely Asked Question Page 1
Webcast 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7147ACPZ-1500RL7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147ACPZ-1REEL | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147ACPZ-500RL7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147ACPZ-REEL | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147PACPZ-1500R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147WPACPZ-1500R | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147WPACPZ-1RL | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147WPACPZ-500R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD7147WPACPZ-RL | 24-Lead LFCSP (4mm x 4mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
| No Match Found | ||
|
May 4, 2016 - 14_0178 Conversion of 3x3mm, 4x4mm and 5x5mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines |
||
| AD7147ACPZ-1500RL7 | PRODUCTION | |
| AD7147ACPZ-1REEL | PRODUCTION | |
| AD7147ACPZ-500RL7 | PRODUCTION | |
| AD7147ACPZ-REEL | PRODUCTION | |
| AD7147PACPZ-1500R7 | PRODUCTION | |
| AD7147WPACPZ-1500R | PRODUCTION | |
| AD7147WPACPZ-1RL | PRODUCTION | |
| AD7147WPACPZ-500R7 | PRODUCTION | |
| AD7147WPACPZ-RL | PRODUCTION | |
|
Feb 15, 2010 - 07_0061 LFCSP Package Manufacturing Line Transfer from Amkor Korea to Amkor PRC |
||
| AD7147ACPZ-1500RL7 | PRODUCTION | |
| AD7147ACPZ-500RL7 | PRODUCTION | |
|
Oct 26, 2009 - 09_0202 Inclusion of Banding Tape for LFCSP REEL7 parts. |
||
| AD7147ACPZ-1500RL7 | PRODUCTION | |
| AD7147ACPZ-500RL7 | PRODUCTION | |
| AD7147PACPZ-1500R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
CapTouch Software License Agreement
CapTouch Software License Agreement 5
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Evaluation Kits
EVAL-AD7147 & EVAL-AD7147-1 Evaluation Boards
Resources
Software
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