BU21010MUV-E2 Rohm Semiconductor, BU21010MUV-E2 Datasheet - Page 3

• Manufacturer Part Number: BU21010MUV-E2
• Description: IC CTLR CAP SENSOR 8CH 16VQFN
• Manufacturer: Rohm Semiconductor
• Type: Capacitive Sensor Controllerr

Specifications of BU21010MUV-E2

• Input Type: Logic
• Output Type: Logic
• Interface: 2-Wire Serial
• Current - Supply: 300µA
• Mounting Type: Surface Mount
• Package / Case: 16-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

●Block Diagram, Pin configuration
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BU21010MUV
SIN[7:0]
www.rohm.com
SREF
SDA
SDN
SCL
・Sensor I/F CV translate circuit
・AD Conversion
・Conversion sequence control
・Data correction and making to format
・Data register
・HOST I/F
・Power management
・Reset generation
・Clock generation
This module selects between sensor inputs. The selection sequences between all 16 channels.
The voltage into which CV is converted is converted into a digital value. Conversion is 10 bit and full scale corresponds to AVDD.
Performs timing generation for the analogue circuitry and a sequencer circuit for selection of the sensor channel for conversion.
This module provides the digital intelligence of the sensor.
The block includes, amongst other things, scaling, adding offsets and input filtering for de-bouncing.
Registers are formatted to simplify usage by the softwareapplication.
The block implements auto-calibration to manage drift in temperature, process variation, voltage variation and aging effects.
This stores the results for the software application. Please refer to the register map for details.
2 wire serial interface.
The power management block provides smart power control.
When the sensors are not in use, the Controller automatically transitions into a low-power mode.
When a sensor is touched, then the device automatically wakes up and enters its normal operation.
The chip drives an INT pin for alerting the controller device in this case.
The circuit is initialized by the external SDN pin.
The device has an internal oscillator.
Provision is also made if the application would like to make use of an external clock input.
Sensor I/F CV
translate circuit
generation
Reset
sequence control
Conversion
AVDD
generation
Clock
CR
oscill
ation
ADC
GND
host I/F
DVDD
Data correction and
Data register
making to format
management
Power
INT
3/14
SIN7/
AVDD
DVDD
LED3
SIN6
2009.04 - Rev.B
Technical Note
SIN1/
LED0
GND
SIN0
SREF