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LTC1657IGN Datenblatt(PDF) 12 Page - Linear Technology

Teilenummer LTC1657IGN
Bauteilbeschribung  Parallel 16-Bit Rail-to-Rail Micropower DAC
PDF  12 Pages
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Hersteller  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1657IGN Datenblatt(HTML) 12 Page - Linear Technology

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LTC1657
©LINEAR TECHNOLOGY CORPORATION 1999
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
1657f LT/TP 0400 4K • PRINTED IN USA
PART NUMBER
DESCRIPTION
COMMENTS
LTC1446(L)
Dual 12-Bit VOUT DACs in SO-8 Package
VCC = 5V (3V), VOUT = 0V to 4.095V (0V to 2.5V)
LTC1450(L)
Single 12-Bit VOUT DACs with Parallel Interface
VCC = 5V (3V), VOUT = 0V to 4.095V (0V to 2.5V)
LTC1458(L)
Quad 12-Bit Rail-to-Rail Output DACs with Added Functionality
VCC = 5V (3V), VOUT = 0V to 4.095V (0V to 2.5V)
LTC1650
Single 16-Bit VOUT Industrial DAC in 16-Pin SO
VCC = ±5V, Low Power, Deglitched, 4-Quadrant Multiplying VOUT
LTC1655(L)
Single 16-Bit VOUT DAC with Serial Interface in SO-8
VCC = 5V (3V), Low Power, Deglitched, VOUT = 0V to 4.096V
(0V to 2.5V)
RELATED PARTS
TYPICAL APPLICATIO
This circuit shows how to measure negative offset. Since
LTC1657 operates on a single supply, if its offset is
negative, the output for code 0 limits at 0V. To measure
this negative offset, a negative supply is needed, connect
resistor R1 as shown in the figure. The output voltage is
the negative offset when code 0 is loaded in.
Although LTC1657 output is up to 4.096V with its internal
reference, higher voltages can be achieved with the help of
another op amp. The following circuit shows how to
increase the output swing of LTC1657 by using an LT1218.
As shown in the configuration, the output of LTC1657 is
amplified by 8 for an output swing of 0V to 32.768V, or a
convenient 0.5mV/LSB.
0.1
µF
5V
–5V
1657 TA06
DATA (0:15)
CSLSB
CSMSB
WR
LDAC
CLR
GND
VCC
REFOUT
REFHI
REFLO
X1/X2
LTC1657
µP
26
21
20
22
23
24
25
5:19
2
3
1
28
27
VOUT
R1
100k
0.1
µF
5V
1657 TA07
VOUT =1 +
0.1
µF
36V
(DIN)(4.096)
65536
R2
R1
DATA (0:15)
CSLSB
CSMSB
WR
LDAC
CLR
GND
VCC
REFOUT
REFHI
REFLO
X1/X2
LTC1657
µP
7
6
4
26
21
20
22
23
24
3
25
5:19
2
3
1
28
27
2
VOUT
–
+
LT1218
()
R1
1k
1%
R2
6.98k
1%
DIN
32.768 (V)
65535
0
TRANSFER CURVE
VOUT
Negative Offset Measurement
A Higher Voltage Output DAC



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