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MP7636 Datasheet(PDF) 1 Page - Exar Corporation

Part No. MP7636
Description  15 V CMOS Microprocessor Compatible Double-Buffered, Multiplying 16-Bit Digital-to-Analog Converter
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Maker  EXAR [Exar Corporation]
Homepage  http://www.exar.com
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MP7636 Datasheet(HTML) 1 Page - Exar Corporation

   
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MP7636A
1
Rev. 2.00
FEATURES
• Four Quadrant Multiplication
• 16-Bit Monotonicity
• Lower Data Bus Feedthrough @ CS = 1
• Low Feedthrough Error
• Low Power Consumption
• TTL/5 V CMOS Compatible
• Double Buffered
• Decoded DAC Approach
• Latch-Up Free
15 V CMOS Microprocessor Compatible
Double-Buffered, Multiplying 16-Bit
Digital-to-Analog Converter
BENEFITS
• High Accuracy Performance at Low Cost
• Easy Interface with 8-Bit Microprocessors
• Simple Upgrade of MP1230A Family to High
Accuracy (Pin Compatible)
• Reduced Board Space
• 16-Bit Bus Version: MP7626
GENERAL DESCRIPTION
The MP7636A is manufactured using advanced thin film
resistors on a double metal CMOS process. The MP7636A
incorporates a unique bit decoding technique yielding lower
glitch, higher speed and excellent accuracy over temperature
and time. 16-bit differential non-linearity is achieved with
minimal laser trim.
The MP7636A is packaged in a 20-pin 300 mil wide DIP and is
a direct 16-bit replacement for the 12-bit DAC1230 series. Full
pin-for-pin compatibility allows existing systems to be upgraded
to 16 bits without hardware modification.
The MP7636A provides 16-bit data loading through 8 input
data lines for direct interface to 8-bit data buses. All data loading
and data transfer operations are identical to the WRITE cycle of
a static RAM.
The MP7636A uses a unique circuit which significantly
reduces transients in the supplies during DATA bus transitions
at CS = 1.
SIMPLIFIED BLOCK DIAGRAM
DGND
AGND
DB15 (MSB)
(DB7)
DB14
(DB6)
DB13
(DB5)
DB12
(DB4)
DB11
(DB3)
DB10
(DB2)
DB9
(DB1)
DB8
(DB0, LSB)
BYTE1/BYTE2
CS
WR1
XFER
WR2
8-Bit
Input
Latch
16-Bit
Register
16-Bit
MDAC
LE
LE
When LE = 1 latch outputs follow inputs
When LE = 0 Latch outputs are latched
RFB
IOUT1
IOUT2
VDD
VREF
8-Bit
Input
Latch


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