Datasheet

LTC2657
24
2657f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2009
LT 0909 • PRINTED IN USA
PACKAGE DESCRIPTION
UFD Package
20-Lead Plastic QFN (4mm × 5mm)
(Reference LTC DWG # 05-08-1711 Rev B)
4.00 ± 0.10
(2 SIDES)
5.00 ± 0.10
(2 SIDES)
NOTE:
1. DRAWING PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220 VARIATION (WXXX-X).
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
PIN 1
TOP MARK
(NOTE 6)
0.75 ± 0.05
0.200 REF
0.00 – 0.05
1.50 REF
0.40 ± 0.10
19 20
1
2
BOTTOM VIEW—EXPOSED PAD
2.50 REF
R = 0.115
TYP
PIN 1 NOTCH
R = 0.20 OR
C = 0.35
0.25 ± 0.05
0.50 BSC
(UFD20) QFN 0506 REV B
R = 0.05 TYP
2.65 ± 0.10
3.65 ± 0.10
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
0.70 ±0.05
0.25 ±0.05
2.65 ± 0.05
2.50 REF
4.10 ± 0.05
5.50 ± 0.05
1.50 REF
3.10 ± 0.05
4.50 ± 0.05
PACKAGE
OUTLINE
3.65 ± 0.05
0.50 BSC
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON THE TOP AND BOTTOM OF PACKAGE
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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OUT
DAC in 16-Pin Narrow SSOP V
CC
= 2.7V to 5.5V, Micropower, Rail-to-Rail Output
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OUT
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LTC2600/LTC2610/
LTC2620
Octal 16-/14-/12-Bit V
OUT
DACs in 16-Lead Narrow SSOP 250A per DAC, 2.5V to 5.5V Supply Range, Rail-to-Rail Output,
SPI Serial Interface
LTC2601/LTC2611/
LTC2621
Single 16-/14-/12-Bit V
OUT
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SPI Serial Interface
LTC2602/LTC2612/
LTC2622
Dual 16-/14-/12-Bit V
OUT
DACs in 8-Lead MSOP 300A per DAC, 2.5V to 5.5V Supply Range, Rail-to-Rail Output,
SPI Serial Interface
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LTC2624
Quad 16-/14-/12-Bit V
OUT
DACs in 16-Lead SSOP 250A per DAC, 2.5V to 5.5V Supply Range, Rail-to-Rail Output,
SPI Serial Interface
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LTC2625
Octal 16-/14-/12-Bit V
OUT
DACs with I
2
C Interface 250A per DAC, 2.7V to 5.5V Supply Range, Rail-to-Rail Output
LTC2606/LTC2616/
LTC2626
Single 16-/14-/12-Bit V
OUT
DACs with I
2
C Interface 270A per DAC, 2.7V to 5.5V Supply Range, Rail-to-Rail Output
LTC2609/LTC2619/
LTC2629
Quad 16-/14-/12-Bit V
OUT
DACs with I
2
C Interface 250A per DAC, 2.7V to 5.5V Supply Range, Rail-to-Rail Output with
Separate V
REF
Pins for Each DAC
LTC2637 Octal I
2
C 12-/10-/8-Bit V
OUT
DACs with 10ppm/°C
Reference
125A per DAC, 2.7V to 5.5V Supply Range, Internal 1.25V or 2.048V
Reference, Rail-to-Rail Output, I
2
C Interface
LTC2641/LTC2642 Single 16-/14-/12-Bit V
OUT
DACs with ±1LSB INL, DNL
±1LSB (Max) INL, DNL, 3mm × 3mm DFN and MSOP Packages,
120A Supply Current, SPI Interface
LTC2704 Quad 16-/14-/12-Bit V
OUT
DACs with ±2LSB INL, ±1LSB DNL Software Programmable Output Ranges Up to ±10V, SPI Interface
LTC2754 Quad 16-/14-/12-Bit I
OUT
DACs with ±1LSB INL, ±1LSB DNL Software Programmable Output Ranges Up to ±10V, SPI Interface
LTC2656 Octal 16-/12-Bit V
OUT
DACs with ±4 LSB INL, ±1 LSB DNL
4mm × 5mm QFN-20, TSSOP-20 Packages, SPI Packages, Internal
10ppm/°C (Max) Reference