DAC1054 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – Quad 10-Bit Voltage-Output Serial D/A Converter with Readback

January 1995
DAC1054 Quad 10-Bit Voltage-Output
Serial D A Converter with Readback
General Description
The DAC1054 is a complete quad 10-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 serial microprocessor interface By combining
in one package the reference amplifiers and conversion
circuitry for four D A converters the DAC1054 minimizes
wiring and parts count and is hence ideally suited for appli-
cations where cost and board space are of prime concern
The DAC1054 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 DAC1054’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^TM-compatible serial in-
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 Each DAC
register may be written to individually Double buffering al-
lows all 4 DAC outputs to be updated simultaneously or
individually
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_BIAS V_REF and the
input word
Features
Y _Single a_{5V supply operation}
Y _{MICROWIRE serial interface allows easy interface to}
many popular microcontrollers including the COPS^TM
and HPC^TM families of microcontrollers
Y _{Data readback capability}
Y _{Output data can be formatted to read back MSB or}
LSB first
Y _{Versatile logic allows selective or global update of the}
DACs
Y _{Power fail flag}
Y _{Output amplifiers can drive 2 kX load}
Y _{Synchronous asynchronous update of the DAC outputs}
Key Specifications
Y _{Guaranteed monotonic over temperature}
Y _{Integral linearity error}
g LSB max
Y _{Output settling time}
3 7 ms max
Y _{Analog output voltage range}
0 3V to 2 8V
Y _{Supply voltage range}
4 5V to 5 5V
Y _{Clock frequency for write}
10 MHz max
Y _{Clock frequency for read back}
5 MHz max
Y _{Power dissipation (fCLK} e _{10 MHz)}
100 mW max
Y _{On-board reference}
2 65V g2% max
Applications
Y _{Automatic test equipment}
Y _{Industrial process controls}
Y _{Automotive controls and diagnostics}
Y _{Instrumentation}
Connection Diagram
Ordering Information
Industrial (b40 C ^k T_A ^k a85 C)
Package
DAC1054CIN
N24A Molded DIP
DAC1054CIWM
M24B Small Outline
Military (b55 C ^k T_A ^k a125 C)
DAC1054CMJ 883 or
5962-9466201MJA
J24A Ceramic DIP
Top View
TL H 11437 – 1
COPSTM HPCTM and MICROWIRETM are trademarks of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL H 11437
RRD-B30M75 Printed in U S A