DAC0854CMJ/883 NSC [National Semiconductor], DAC0854CMJ/883 Datasheet

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DAC0854CMJ/883

Manufacturer Part Number
DAC0854CMJ/883
Description
8-Bit Voltage-Output
Manufacturer
NSC [National Semiconductor]
Datasheet
C 1995 National Semiconductor Corporation
DAC0854 Quad 8-Bit Voltage-Output
Serial D A Converter with Readback
General Description
The DAC0854 is a complete quad 8-bit voltage-output digi-
tal-to-analog converter that can operate on a single 5V sup-
ply It includes on-chip output amplifiers internal voltage ref-
erence and a serial microprocessor interface By combining
in one package the reference amplifiers and conversion
circuitry for four D A converters the DAC0854 minimizes
wiring and parts count and is hence ideally suited for appli-
cations where cost and board space are of prime concern
The DAC0854 also has a data readback function which can
be used by the microprocessor to verify that the desired
input word has been properly latched into the DAC0854’s
data registers The data readback function simplifies the de-
sign and reduces the cost of systems which need to verify
data integrity
The logic comprises a MICROWIRE
terface and control circuitry The interface allows the user to
write to any one of the input registers or to all four at once
The latching registers are double-buffered consisting of 4
separate input registers and 4 DAC registers Double buffer-
ing allows all 4 DAC outputs to be updated simultaneously
The four reference inputs allow the user to configure the
system to have a separate output voltage range for each
DAC The output voltage of each DAC can range between
0 3V and 2 8V and is a function of V
input word
Connection Diagram
COPS
TM
HPC
TM
and MICROWIRE
TM
Top View
are trademarks of National Semiconductor Corporation
TL H 11261
TM
-compatible serial in-
BIAS
V
REF
TL H 11261 – 1
and the
Features
Y
Y
Y
Y
Y
Y
Y
Y
Key Specifications
Y
Y
Y
Y
Y
Y
Y
Y
Applications
Y
Y
Y
Y
Ordering Information
DAC0854BIN DAC0854CIN
DAC0854CIJ
DAC0854BIWM DAC0854CIWM
Military (
DAC0854CMJ 883
Industrial (
Single
MICROWIRE serial interface allows easy interface to
many popular microcontrollers including the COPS
and HPC
Data readback capability
Output data can be formatted to read back MSB or
LSB first
Versatile logic allows selective or global update of the
DACs
Power fail flag
Output amplifiers can drive 2 k
Synchronous asynchronous update of the DAC outputs
Guaranteed monotonic over temperature
Integral linearity error
Output settling time
Analog output voltage range
Supply voltage range
Clock frequency
Power dissipation (f
On-board reference
Automatic test equipment
Industrial process controls
Automotive controls and diagnostics
Instrumentation
a
b
TM
5V supply operation
55 C
b
families of microcontrollers
40 C
k
T
k
A k
CLK
T
A
a
e
a
125 C)
85 C)
10 MHz)
load
N20A Molded DIP
J20A Ceramic DIP
M20B Small Outline
J20A Ceramic DIP
RRD-B30M75 Printed in U S A
2 65V
Package
g
January 1995
10 MHz max
0 3V to 2 8V
4 5V to 5 5V
95 mW max
2 7 s max
g
LSB max
2% max
TM

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DAC0854CMJ/883 Summary of contents

Page 1

DAC0854 Quad 8-Bit Voltage-Output Serial D A Converter with Readback General Description The DAC0854 is a complete quad 8-bit voltage-output digi- tal-to-analog converter that can operate on a single 5V sup- ply It includes on-chip output amplifiers internal voltage ref- ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 24) Supply Voltage ( Supply Voltage Difference (AV – Voltage ...

Page 3

Converter Electrical Characteristics The following specifications apply for AV CC the analog outputs – pins and 19) and f T from All other limits apply for MIN MAX Symbol Parameter DIGITAL ...

Page 4

Converter Electrical Characteristics The following specifications apply for AV CC the analog outputs – pins and 19) and f T from All other limits apply for MIN MAX Symbol Parameter AC ...

Page 5

Typical Converter Performance Characteristics Zero Error vs Temperature Zero Error PSRR vs Temperature Typical Reference Performance Characteristics Bandgap Voltage vs Temperature Full-Scale Error vs Temperature Full-Scale Error PSRR vs Temperature Line Regulation vs Temperature TL H 11261 – ...

Page 6

TRI-STATE Test Circuits and Waveforms Timing Waveforms Data Input Timing Timing Diagrams FIGURE 1 Write to One DAC with Update of Output ( 11261– 11261–7 Data Output Timing TL H 11261– 11261 ...

Page 7

Timing Diagrams (Continued) DACs are written to LSB first DAC1 is written to first then DACs 2 3 and 4 FIGURE 2 Write to All DACs with Update of Outputs (AU FIGURE 3 Read One DAC DO Changes on Falling ...

Page 8

Block Diagram Pin Description V (19) The voltage output connections of the OUT1 V (1) four DACS These provide output OUT2 V (14) voltages in the range 0 3V–2 8V OUT3 V (11) OUT4 V OUT(16) The internal voltage reference ...

Page 9

Applications Information FUNCTIONAL DESCRIPTION The DAC0854 is a monolithic quad 8-bit digital-to-analog converter that is designed to operate on a single 5V supply Each of the four units is comprised of an input register a DAC register a shift register ...

Page 10

Digital Interface The DAC0854 has two interface modes a WRITE mode and a READ mode The WRITE mode is used to convert an 8-bit digital input word into a voltage The READ mode is used to read back the digital ...

Page 11

Digital Interface (Continued) Table III lists the instruction set for the READ mode By the appropriate setting of the global (G) and address (A1 and A0) bits one can select a specific DAC to be read or one can read ...

Page 12

Typical Applications FIGURE 7 Trimming the Offset Amp Biased at Mid Supply FIGURE 8 Trimming the Offset of a Dual Supply Op Amp Biased at Ground FIGURE 9 Bringing the Output Range Down to Ground TL ...

Page 13

Physical Dimensions inches (millimeters) Order Number DAC0854CIJ or DAC0854CMJ 883 Order Number DAC0854BIWM or DAC0854CIWM NS Package Number J20A NS Package Number M20B 13 ...

Page 14

Physical Dimensions inches (millimeters) (Continued) Order Number DAC0854BIN or DAC0854CIN LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR ...

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