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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
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1
+
LATCH 1
D
A
T
A
B
U
S
DAC 1
V
OUT1
MSB
DATA
(8 BIT)
LSB
LATCH 2
DAC 2
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2
+
V
OUT2
LATCH 3
DAC 3
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3
+
V
OUT3
LATCH 4
WR
DAC 4
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+ 4
V
OUT4
A1
A0
CONTROL
LOGIC
V
SS
AGND
DGND
Rev. 2.00
1
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