LTC1661CMS8 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1661CMS8' PDF : 14 Pages View PDF
LTC1661
TYPICAL APPLICATION
Pin Driver VH and VL Adjustment in ATE Applications
CS/LD
DIN
SCK
5V 0.1µF
4
6
VH = 7.5V
(FROM MAIN
INPUT DAC)
DAC A
1
3
LTC1661
U1
2
DAC B
R2
8 50k
VA1 = 2.5V
R3
5 50k
R1
5k
10V
0.1µF
8
3+
U3A
LT1368
2–
4
1
0.1µF
–5V
VB1
R4
5k
VH′ = VH + VH
FOR EACH U1 AND U2
CODE A CODE B ∆VH, ∆VL
512 1023 –250mV
512 512
0
512
0
250mV
0.1µF
5V 0.1µF
4
6
DAC B
1
3
LTC1661
U2
2
DAC A
7
R5
R6
5 50k
5k
VB2
6–
U3B
7
LT1368
5+
R7
8 50k
VA2 = 2.5V
R8
5k
VL = –2.5V
(FROM MAIN
INPUT DAC)
LOGIC
DRIVE
VH
VL
PIN
DRIVER
(1 0F N)
VL′ = VL + ∆VL
–2.5V 250mV
VOUT
7.5V 250mV
0.1µF
VA1 = VA2 = 2.5V
VH′ = VH +
R1
R2
(VA1 – VB1)
VL′ = VL +
R1
R2
(VA2 – VB2)
FOR VALUES SHOWN,
∆VH, ∆VL ADJUSTMENT RANGE = ±250mV
∆VH, ∆VL STEP SIZE = 500µV
1661 F03
RELATED PARTS
PART NUMBER DESCRIPTION
LTC1446/LTC1446L Dual 12-Bit VOUT DACs in SO-8 Package with Internal Reference
LTC1448
LTC1454/LTC1454L
LTC1458/LTC1458L
Dual 12-Bit VOUT DAC in SO-8 Package
Dual 12-Bit VOUT DACs in SO-16 Package with Added
Functionality
Quad 12-Bit Rail-to-Rail Output DACs with Added Functionality
LTC1659
LTC1663
LTC1665/LTC1660
Single Rail-to-Rail 12-Bit VOUT DAC in 8-Lead MSOP Package
VCC: 2.7V to 5.5V
Single 10-Bit VOUT DAC in SOT-23 Package
Octal 8/10-Bit VOUT DAC in 16-Pin Narrow SSOP
14 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
COMMENTS
LTC1446: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V
LTC1446L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V
VCC = 2.7V to 5.5V, External Reference Can Be Tied to VCC
LTC1454: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V
LTC1454L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V
LTC1458: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V
LTC1458L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V
Low Power Multiplying VOUT DAC. Output Swings from GND to
REF. REF Input Can Be Tied to VCC
VCC = 2.7V to 5.5V, Internal Reference, 60µA
VCC = 2.7V to 5.5V, Micropower, Rail-to-Rail Output
1661fa
LT 1110 REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1999
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