LTC7545 Linear Technology, LTC7545 Datasheet

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LTC7545

Manufacturer Part Number
LTC7545
Description
Improved Industry Standard Parallel 12-Bit Multiplying DAC
Manufacturer
Linear Technology
Datasheet

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FEATURE
A
TYPICAL
WR
V
CS
IN
PPLICATI
Improved Direct Replacement for AD7545A
and AD7545
DNL and INL Over Temperature: 0.5LSB
Gain Error: 1LSB Maximum
4-Quadrant Multiplication
Single 5V or 15V Supply
Low Power Consumption
Low Cost
Process Control and Industrial Automation
Software Controlled Gain Adjustment
Digitally Controlled Filter and Power Supplies
Automatic Test Equipment
0.1 F
17
16
2-Quadrant Multiplying DAC Has Less Than
V
5V
0.5LSB (Typ) Total Unadjusted Error
DD
18
LTC7545A
A
S
V
REF
4–15
O
PPLICATI
19
DGND
U
R
FB
AGND
OUT1
20
3
S
2
1
O
33pF
U
+
LT
®
1097
7545A TA01
V
OUT
Parallel 12-Bit Multiplying DAC
Improved Industry Standard
D
The LTC
converter (DAC) with a microprocessor compatible paral-
lel input. It is a superior pin compatible replacement for the
industry standard AD7545A and AD7545. Improvements
include better accuracy, better stability over temperature
and supply variations and lower sensitivity to output
amplifier offset.
This very versatile DAC is useful for 2-quadrant and
4-quadrant multiplying, programmable gain and filtering
and single supply noninverting voltage output operation.
Parts are available in 20-pin PDIP and SO packages and
commercial and industrial temperature grades.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ESCRIPTIO
®
–0.5
–1.0
7545A is a 12-bit multiplying digital-to-analog
1.0
0.5
Integral Nonlinearity Over Temperature
0
0
512
T
1024
U
A
= 85 C
DIGITAL INPUT CODE
1536
2048
T
T
A
A
= 25 C
= –40 C
2560
3072
3584
LTC7545A
7545A TA02
4095
1

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LTC7545 Summary of contents

Page 1

... Parts are available in 20-pin PDIP and SO packages and commercial and industrial temperature grades. , LTC and LT are registered trademarks of Linear Technology Corporation. 1.0 0.5 – ® LT 1097 V OUT + –0.5 7545A TA01 –1.0 LTC7545A U Integral Nonlinearity Over Temperature – 512 ...

Page 2

... LTC7545ABN LTC7545ABSW LTC7545ACN LTC7545ACSW 6 15 DB0 (LSB) LTC7545AKN 7 14 DB1 LTC7545AKSW 8 13 DB2 LTC7545ALN 9 12 DB3 LTC7545ALSW 10 11 DB4 SW PACKAGE 20-LEAD PLASTIC SO WIDE = 150 C, = 100 C/W ( 150 C, = 130 C/W (SW) JA LTC7545AK/AB LTC7545AL/AC MIN TYP MAX MIN TYP MAX ...

Page 3

... Note 7: To 0.01% for a full-scale change, measured from the falling edge of WR 0V. Note 8: From digital input change to 90% of final analog output. = 0V. DAC register contents changed from all 0s to all 1s Note 9: V REF or all 1s to all 0s. LTC7545A ALL GRADES MIN TYP MAX UNITS 2 ...

Page 4

... LTC7545A W BLOCK DIAGRAM V 19 REF DIAGRA DATA IN DB0 to DB11 4 20k 20k 40k 40k 40k 40k DECODER LOAD INPUT DATA LATCHES DB11 DB10 DB9 (MSB DATA VALID 20k R 20 40k 40k ...

Page 5

... OUT1 2 AGND DGND 3 DIGITAL INPUT BINARY NUMBER ANALOG OUTPUT IN DAC LATCH V LSB 1111 1111 – V (4095/4096) REF 0000 0000 – V (2048/4096) = – V REF 0000 0001 – V (1/4096) REF 0000 0000 0V LTC7545A – V OUT LT1097 0V TO – V REF + 7545A TA03 OUT /2 REF 5 ...

Page 6

... LTC7545A U TYPICAL APPLICATIONS –10V TO 10V 5V OR 15V 0 LTC7545A CS P DB11–DB0 4–15 Table 2. Bipolar Offset Binary Code Table MSB 1111 1000 1000 0111 0000 6 N Bipolar Operation (4-Quadrant Multiplication) V REF R2 20K 19 20 33pF R REF FB 1 – OUT1 ...

Page 7

... DWG # 05-08-1510 0.255 0.015* (6.477 0.381 0.130 0.005 (3.302 0.127) MIN 0.005 0.125 (0.127) (3.175) MIN MIN 0.100 0.010 (2.540 0.254) LTC7545A 1.040* (26.416) MAX 0.045 – 0.065 (1.143 – 1.651) ...

Page 8

... LTC7545A PACKAGE DESCRIPTION 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 45 (0.254 – 0.737) 0.009 – 0.013 NOTE 1 (0.229 – 0.330) 0.016 – 0.050 (0.406 – 1.270) NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. ...

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