MP7226 查看數據表（PDF） - Exar Corporation
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MP7226 Datasheet PDF : 16 Pages
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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
• µP Compatible (95ns WR)
BENEFITS
• No External Adjustments Required
• Power-on-Reset Function
• Specified for 5 to 15 V Operation
• ESD Protection: 2000 Volts Minimum
• Latch-Up Proof
• Octal Available: MP7228
• Reduced Board Space; Lower System Cost
• Reduced System Errors due to Excellent DAC-to-DAC
Matching and Tracking
• Easy to Design with Microprocessors
• Stable, High Reliability through Advanced Processing
• 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
MSB
D
A
DATA
T
(8 BIT)
A
LSB
B
U
S
WR
VREF
VDD
LATCH 1
LATCH 2
–
DAC 1
+1
–
DAC 2
+2
LATCH 3
–
DAC 3
+3
LATCH 4
–
DAC 4
+4
VOUT1
VOUT2
VOUT3
VOUT4
Rev. 2.00
A1
CONTROL
A0
LOGIC
VSS
AGND
DGND
1
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