LTC1257CN8 Linear Technology, LTC1257CN8 Datasheet

IC D/A CONV 12BIT VOLT OUT 8-DIP

LTC1257CN8

Manufacturer Part Number
LTC1257CN8
Description
IC D/A CONV 12BIT VOLT OUT 8-DIP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1257CN8

Settling Time
6µs
Number Of Bits
12
Data Interface
Serial
Number Of Converters
1
Voltage Supply Source
Single Supply
Power Dissipation (max)
1.75mW
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1257CN8
Manufacturer:
LT
Quantity:
5 510
Part Number:
LTC1257CN8
Manufacturer:
LTNEAR
Quantity:
20 000
Part Number:
LTC1257CN8#PBF
Manufacturer:
LTC
Quantity:
500
Part Number:
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Manufacturer:
Microchip
Quantity:
408
Part Number:
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Manufacturer:
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Quantity:
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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
CONTROL OUTPUT 1
CONTROL OUTPUT 2
8-Pin SO Package
Buffered Voltage Output
Built-In 2.048V Reference
500 V/LSB with 2.048V Full Scale
1/2LSB Max DNL Error
Guaranteed 12-Bit Monotonic
3-Wire Cascadable Serial Interface
Wide Single Supply Range: V
Low Power: I
Digital Offset/Gain Adjustment
Industrial Process Control
Automatic Test Equipment
0.1 F
0.1 F
CC
Daisy-Chained Control Outputs
Typ = 350 A with 5V Supply
U
5V
V
V
OUT
OUT
GND
GND
LTC1257
LTC1257
V
V
CC
V
V
REF
REF
CC
CC
U
= 4.75V to 15.75V
LOAD
LOAD
D
D
CLK
CLK
OUT
OUT
D
D
IN
IN
TO NEXT DAC
1257 TA01
P
DESCRIPTIO
The LTC
output D/A converter (DAC) in an SO-8 package. The
LTC1257 includes an output buffer amplifier, 2.048V
voltage reference and an easy to use three-wire cascadable
serial interface. An external reference can be used to
override the internal reference and extend the output
voltage range to 12V. The power supply current is a low
350 A when operating from a 5V supply, making the
LTC1257 ideal for battery-powered applications. The space-
saving 8-pin SO package and operation with no external
components provide the smallest 12-bit D/A system
available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Complete Single Supply
®
1257 is a complete single supply, 12-bit voltage
–0.5
12-Bit Voltage Output
0.5
0.0
0
512
Differential Nonlinearity
1024
U
vs Input Code
1536
CODE
2048 2560
DAC in SO-8
3072 3584 4098
1257 TA05
LTC1257
1

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LTC1257CN8 Summary of contents

Page 1

... A when operating from a 5V supply, making the LTC1257 ideal for battery-powered applications. The space- saving 8-pin SO package and operation with no external components provide the smallest 12-bit D/A system available. , LTC and LT are registered trademarks of Linear Technology Corporation CLK P LOAD ...

Page 2

... REF 0 I 100 A REF V > 2.7V CC REF (Note 2) V Shorted to GND REF U W TOP VIEW ORDER PART NUMBER OUT LTC1257CN8 REF 6 LTC1257IN8 GND 5 N8 PACKAGE 8-LEAD PDIP = 100 C/W JA TOP VIEW LTC1257CS8 LTC1257IS8 V 7 OUT REF 6 S8 PART MARKING GND 5 1257 ...

Page 3

ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating temperature range, otherwise specifications are 4.75V to 15.75V, internal or external reference (2.475V V A MIN MAX CC SYMBOL ...

Page 4

LTC1257 W U TYPICAL PERFOR A CE CHARACTERISTICS Minimum Supply Voltage vs Load Current #1 5 INTERNAL REF 4 FULL SCALE OUT 4.6 A 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Differential Nonlinearity (DNL) 0.5 0.0 –0.5 0 512 1024 1536 2048 2560 3072 3584 4098 CODE 1257 TA05 CTIO S CLK (Pin 1): The TTL level input for ...

Page 6

LTC1257 U U DEFI ITIO S LSB: The least significant bit or the ideal voltage difference between two successive codes. n LSB = (V – V )/2 – The number of digital input bits V ...

Page 7

W BLOCK DIAGRA LOGIC SUPPLY CLK D IN LOAD REF DIAGRA t 1 CLK D IN MSB LOAD B11 D OUT (PREVIOUS WORD) 5V REGULATOR 12-BIT SHIFT REGISTER 12 12-BIT LATCH 12 2.048V REFERENCE ...

Page 8

LTC1257 U OPERATIO Serial Interface The data on the D input is loaded into the shift register IN on the rising edge of the clock. The MSB is loaded first and the LSB last. The DAC register loads the data ...

Page 9

U TYPICAL APPLICATIO S 5V 100 0.1 F 100k 2N3906 V IN – J LT1025A + GND COMMON + 10 F – 1k Auto Ranging 8-Channel ADC with Shutdown CH0 ANALOG • D ...

Page 10

LTC1257 PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) ...

Page 11

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Output Swings from GND to REF, REF Input Can Be Tied Output Swings from GND to REF, REF Input Can Be Tied Programmable Speed/Power, SO-8 Footprint (3V), Low Power, Deglitched 4.096V (0V to 2.5V) OUT 1257fb LT/TP 1101 REV B 1.5K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1994 ...

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