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Part Number: BUF16821

 

 

 

 

Description: The BUF16821 offers 16 programmable gamma channels and two programmable VCOM channels.

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BUF16821 General Description


The BUF16821 offers 16 programmable gamma channels and two programmable VCOM channels.The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow forppraongerlarmewmoinrkg, tehreroBrsUFor16l8iq2u1idsucprypsotratsl duipsptolay16(LwCrDite operations to the on-chip memory.

The BUF16821 has two separate memory banks,allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves. All gamma and VCOM channels offer a rail-to-rail output that typically swings to within 150mV of eithersupply rail with a 10mA load.

All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz.The BUF16821 is manufactured using

TexasICnMstOruSmepnrotsc'epssro.pTrhieistarpyr,ocsetastse-oofff-ethrse-vaertr,yhdigehn-sveolltoaggiec and high supply voltage operation of up to 20V. The BUF16821 is offered in a HTSSOP-28 PowerPAD™package, and is specified from 40 to +85.

BUF16821 Maximum Ratings

PARAMETER BUF16821 UNIT
Supply Voltage                                                                      VS +22 V
Supply Voltage                                                                    VSD +6 V
Digital Input Pins, SCL, SDA, AO, BKSEL: Voltage 0.5 to +6 V
Digital Input Pins, SCL, SDA, AO, BKSEL: Current ±10 mA
Output Pins, OUT1 through OUT16, VCOM1 and VCOM2(2) (V) 0.5 to (V+) + 0.5 V
Output Short-Circuit(3) Continuous  
Ambient Operating Temperature 40 to +95
Ambient Storage Temperature 65 to +150
Junction Temperature                                                          TJ +125
ESD Rating Human Body Model      (HBM) 3000 V
Charged Device Model  (CDM) 1000 V
Machine Model             (MM) 200 V

(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported.
(2) See the Output Protection section.
(3) Short-circuit to ground, one amplifier per package.

BUF16821 Features

` 10-BIT RESOLUTION
` 16-CHANNEL P-GAMMA
` 2-CHANNEL P-VCOM
` 16x REWRITABLE NONVOLATILE MEMORY
` TWO INDEPENDENT PIN-SELECTABLE MEMORY BANKS
` RAIL-TO-RAIL OUTPUT
300mV Min Swing-to-Rail (10mA)
> 300mA Max IOUT
` LOW SUPPLY CURRENT
` SUPPLY VOLTAGE: 9V to 20V
` DIGITAL SUPPLY: 2V to 5.5V
` I2C™ INTERFACE: Supports 400kHz and 3.4MHz

BUF16821 Typical Application

· TFT-LCD REFERENCE DRIVERS

BUF16821 Connection Diagram

BUF16821 Connection Diagram

BUF16821 datasheet

BUF03AJ
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