MP7226KP EXAR [Exar Corporation], MP7226KP Datasheet

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MP7226KP

Manufacturer Part Number
MP7226KP
Description
BiCMOS Fixed, Quad, Voltage Output, Single or Dual Supply 8-Bit Digital-to-Analog Converter
Manufacturer
EXAR [Exar Corporation]
Datasheet

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Part Number:
MP7226KP
Manufacturer:
N/A
Quantity:
20 000
FEATURES
GENERAL DESCRIPTION
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.
logic is speed compatible with most 8-bit microprocessors. All
digital inputs are TTL/CMOS(5V) compatible.
SIMPLIFIED BLOCK DIAGRAM
MPS Pioneered Segmented DAC Approach
Four 8-Bit DACs with Buffer Amplifiers
Bipolar Amplifier Inputs for Low Noise and Drift
Operates with Single or Dual Supplies
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
The MP7226 contains four 8-bit voltage-output Digital-to-
P Compatible (95ns WR)
Rev. 2.00
DATA
(8 BIT)
MSB
LSB
WR
A1
A0
CONTROL
LOGIC
D
A
A
B
U
S
T
The control
LATCH 1
LATCH 2
LATCH 3
LATCH 4
Fixed, Quad, Voltage Output, Single or Dual
APPLICATIONS
BENEFITS
V
V
Function Generators
Automatic Test Equipment
Process Controls
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
1
REF
SS
Supply 8-Bit Digital-to-Analog Converter
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.
The MP7226 is manufactured using advanced thin film resis-
DAC 1
DAC 2
DAC 3
DAC 4
AGND
V
DD
+
+
+
+ 4
DGND
1
2
3
V
V
V
V
OUT1
OUT2
OUT3
OUT4
MP7226
BiCMOS

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MP7226KP Summary of contents

Page 1

FEATURES MPS Pioneered Segmented DAC Approach Four 8-Bit DACs with Buffer Amplifiers Bipolar Amplifier Inputs for Low Noise and Drift Operates with Single or Dual Supplies P Compatible (95ns WR) No External Adjustments Required Power-on-Reset Function Specified for 5 to ...

Page 2

... Digital Ground 7 DB7 Data Input Bit 7 (MSB) 8 DB6 Data Input Bit 6 9 DB5 Data Input Bit 5 10 DB4 Data Input Bit 4 Rev. 2.00 INL DNL Part No. (LSB) (LSB) MP7226KN 1 1/2 MP7226LN* 1/2 1/2 MP7226KP 1 1/2 MP7226LP* 1/2 1/2 MP7226KS 1 1/2 MP7226LS* 1/2 1 See 4 17 Pin Out Left ...

Page 3

ELECTRICAL CHARACTERISTICS Single or Dual Supply Operation (V DGND = + REF Parameter Symbol STATIC PERFORMANCE Resolution (All Grades) N Integral Non-Linearity INL (Relative Accuracy Differential Non-Linearity DNL K ...

Page 4

MP7226 ELECTRICAL CHARACTERISTICS (CONT’D) Parameter Symbol POWER SUPPLY V Range Range (Dual Supplies (Dual Supplies) SS SWITCHING CHARACTERISTICS Address to WR Setup Time Address to WR Hold ...

Page 5

ELECTRICAL CHARACTERISTICS Single & Dual 5 V Supply Operation (V AGND = 0 V, DGND = Parameter Symbol STATIC PERFORMANCE Resolution (All Grades) N Integral Non-Linearity INL (Relative Accuracy Differential ...

Page 6

MP7226 ELECTRICAL CHARACTERISTICS (CONT’D) Parameter Symbol POWER SUPPLY V Range (Dual Supplies) SS SWITCHING CHARACTERISTICS Address to WR Setup Time Address to WR Hold Time Data Valid ...

Page 7

D/A CONVERTER SECTION The MP7226 contains four matched, 8-bit, voltage-mode Dig- ital-to-Analog Converters (DACs) which incorporate an MPS pioneered unique bit decoding technique. This decoding scheme reduces the maximum binary weight carried by any re- sistor switch, reducing the accuracy ...

Page 8

MP7226 AGND Figure 2. Simplified Output Buffer Amplifiers The amplifiers outputs may be shorted to ground. However, the power dissipation of the package should not exceed the maximum limit. Digital Inputs All of the digital inputs ...

Page 9

APPLICATIONS INFORMATION Power On Reset At power up, all inputs are reset For the addressed DAC will receive input data. Power Supply The MP7226 can operate with either a single ...

Page 10

MP7226 V REF R1 V REF V – OUT + DAC V AGND (1+R2/R1) – R2/R1 OUT n REF REF (2D – 1) ...

Page 11

R R DAC Output R V OFFSET R R DAC Output1 R DAC Output2 Figure 7. Digitally Programmable Offset Adjustment Circuits AC Reference Input DAC or DC Voltage AC Reference Input Signal Circuit (DC Couple) Offsetting DAC Outputs Figure 7. ...

Page 12

MP7226 PERFORMANCE CHARACTERISTICS Graph 1. Power Supply Current vs. Temperature Rev. 2.00 Graph 2. Relative Accuracy vs. Digital Code 12 ...

Page 13

LEAD PLASTIC DUAL-IN-LINE Seating Plane L B SYMBOL ( Note: (1) The minimum limit for dimensions B1 may ...

Page 14

MP7226 D 20 Seating Plane e Rev. 2.00 20 LEAD SMALL OUTLINE (300 MIL JEDEC SOIC) S20 INCHES MILLIMETERS SYMBOL MIN MAX MIN A 0.097 0.104 2.464 A 0.0050 ...

Page 15

LEAD PLASTIC LEADED CHIP CARRIER SYMBOL ( Note: Rev. 2.00 (PLCC) P20 e 1 ...

Page 16

MP7226 EXAR Corporation reserves the right to make changes to the products contained in this publication in order to im- prove design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits de- scribed herein, conveys ...

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