DAC729
DAC
729
Ultra-High Resolution
18-BIT DIGITAL-TO-ANALOG CONVERTER
FEATURES
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5
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q HERMETIC 40-PIN CERAMIC PACKAGE
q IOUT OR VOUT OPERATION
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4
q FAST SETTLING, LOW NOISE INTERNAL
OP AMP
q LOW DRIFT
39
3
q USER ADJUSTABLE TO 18-BIT
LINEARITY
q PRECISION INTERNAL REFERENCE
40
2
q 16-BIT LINEARITY GUARANTEED
(K Grade)
35
Precision
10V
Reference
7
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8
The DAC729 sets the standard in very high accuracy
digital-to-analog conversion. It is supplied from the
factory at a guaranteed linearity of 16 bits, and is useradjustable to 18-bit linearity (1LSB = FSR/262144).
To attain this high level of accuracy, the design takes
advantage of Burr-Brown’s thin-film monolithic DAC
process, dielectric op amp process, hybrid capabilities,
and advanced test and laser-trim techniques.
The DAC729 hybrid layout is specifically partitioned
to minimize the effects of external load-currentinduced thermal errors. The op amp design consists of
a fast settling precision op amp with a current buffer
within the feedback loop. This buffer isolates the load
from the precision op amp, which results in a fast
settling (8µs to 16 bits) output. The standard 40-pin
package offers full hermeticity, contributing to the
excellent reliability of the DAC729.
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DESCRIPTION
18-Bit
IOUT
DAC
32
10
Servo-Loop
Amplifier
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11
30
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5kΩ
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28
5kΩ
14
27
5kΩ
15
5kΩ
26
16
25
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24
18
23
19
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21
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1988 Burr-Brown Corporation
PDS-749C
Printed in U.S.A. October, 1993