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
EXAR [ EXAR CORPORATION ]
