Datasheet
12
LTC1661
LINEAR TECHNOLOGY CORPORATION 1999
1661f LT/TP 0100 4K • PRINTED IN THE USA
PART NUMBER DESCRIPTION COMMENTS
LTC1446/LTC1446L Dual 12-Bit V
OUT
DACs in SO-8 Package with Internal Reference LTC1446: V
CC
= 4.5V to 5.5V, V
OUT
= 0V to 4.095V
LTC1446L: V
CC
= 2.7V to 5.5V, V
OUT
= 0V to 2.5V
LTC1448 Dual 12-Bit V
OUT
DAC in SO-8 Package V
CC
= 2.7V to 5.5V, External Reference Can Be Tied to V
CC
LTC1454/LTC1454L Dual 12-Bit V
OUT
DACs in SO-16 Package with Added Functionality LTC1454: V
CC
= 4.5V to 5.5V, V
OUT
= 0V to 4.095V
LTC1454L: V
CC
= 2.7V to 5.5V, V
OUT
= 0V to 2.5V
LTC1458/LTC1458L Quad 12-Bit Rail-to-Rail Output DACs with Added Functionality LTC1458: V
CC
= 4.5V to 5.5V, V
OUT
= 0V to 4.095V
LTC1458L: V
CC
= 2.7V to 5.5V, V
OUT
= 0V to 2.5V
LTC1659 Single Rail-to-Rail 12-Bit V
OUT
DAC in 8-Lead MSOP Package Low Power Multiplying V
OUT
DAC. Output Swings from
V
CC
: 2.7V to 5.5V GND to REF. REF Input Can Be Tied to V
CC
LTC1663 Single 10-Bit V
OUT
DAC in SOT-23 Package V
CC
= 2.7V to 5.5V, Internal Reference, 60µA
LTC1665/LTC1660 Octal 8/10-Bit V
OUT
DAC in 16-Pin Narrow SSOP V
CC
= 2.7V to 5.5V, Micropower, Rail-to-Rail Output
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
TYPICAL APPLICATIO
U
Pin Driver V
H
and V
L
Adjustment in ATE Applications
–
+
U3A
LT1368
PIN
DRIVER
(1 0F N)
V
H
V
L
V
OUT
1661 F03
LOGIC
DRIVE
4
–5V
10V
5V
V
H
= 7.5V
(FROM MAIN
INPUT DAC)
V
L
= –2.5V
(FROM MAIN
INPUT DAC)
V
A1
= 2.5V
V
H
′ = V
H
+ ∆V
H
V
L
′ = V
L
+ ∆V
L
V
B1
R4
5k
0.1µF
8
3
1
CS/LD
D
IN
SCK
4 6
3
2
1
8
5
2
0.1µF
R3
50k
LTC1661
U1
DAC A
DAC B
R2
50k
R1
5k
0.1µF
+
–
U3B
LT1368
5V
V
B2
V
A2
= 2.5V
6
1
4 6
3
2
7
5
8
5
0.1µF
R7
50k
LTC1661
U2
DAC B
DAC A
R5
50k
R6
5k
7
R8
5k
0.1µF
0.1µF
FOR EACH U1 AND U2
CODE A CODE B ∆V
H
, ∆V
L
512 1023 –250mV
512 512 0
512 0 250mV
–2.5V ±250mV
7.5V ±250mV
V
A2
= 2.5VV
A1
=
V
H
+(V
A1
– V
B1
)V
H
′ =
R1
R2
V
L
+(V
A2
– V
B2
)V
L
′ =
FOR VALUES SHOWN,
∆V
H
, ∆V
L
ADJUSTMENT RANGE = ±250mV
∆V
H
, ∆V
L
STEP SIZE = 500µV
R1
R2