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MP7226

MP7226

Model MP7226
Description BiCMOS Fixed, Quad, Voltage Output, Single or Dual Supply 8-Bit Digital-to-Analog Converter
PDF file Total 16 pages (File size: 182K)
Chip Manufacturer EXAR
MP7226
BiCMOS
Fixed, Quad, Voltage Output, Single or Dual
Supply 8-Bit Digital-to-Analog Converter
FEATURES
APPLICATIONS
MPS Pioneered Segmented DAC Approach
Function Generators
Four 8-Bit DACs with Buffer Amplifiers
Automatic Test Equipment
Bipolar Amplifier Inputs for Low Noise and Drift
Process Controls
Operates with Single or Dual Supplies
BENEFITS
µP
Compatible (95ns WR)
No External Adjustments Required
Reduced Board Space; Lower System Cost
Power-on-Reset Function
Reduced System Errors due to Excellent DAC-to-DAC
Specified for 5 to 15 V Operation
Matching and Tracking
ESD Protection: 2000 Volts Minimum
Easy to Design with Microprocessors
Latch-Up Proof
Stable, High Reliability through Advanced Processing
Octal Available: MP7228
Lower 1/f Noise Increases Useful Dynamic Range
GENERAL DESCRIPTION
The MP7226 contains four 8-bit voltage-output Digital-to-
Analog Converters, with BiCMOS output buffer amplifiers and
interface logic on a monolithic chip. Separate on-chip latches
are provided for each of the four D/A converters. The control
logic is speed compatible with most 8-bit microprocessors. All
digital inputs are TTL/CMOS(5V) compatible.
The MP7226 is manufactured using advanced thin film resis-
tors on a double metal BiCMOS process. The MP7226 incorpo-
rates a unique bit decoding technique yielding lower glitch,
higher speed and excellent accuracy over temperature and
time. The MP7226 maintains 8-Bit accuracy over the full operat-
ing temperature range without laser trim or external adjust-
ments.
SIMPLIFIED BLOCK DIAGRAM
V
REF
V
DD
1
+
LATCH 1
D
A
T
A
B
U
S
DAC 1
V
OUT1
MSB
DATA
(8 BIT)
LSB
LATCH 2
DAC 2
2
+
V
OUT2
LATCH 3
DAC 3
3
+
V
OUT3
LATCH 4
WR
DAC 4
+ 4
V
OUT4
A1
A0
CONTROL
LOGIC
V
SS
AGND
DGND
Rev. 2.00
1
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