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PDF LTC7545A Data sheet ( Hoja de datos )
| Número de pieza | LTC7545A | |
| Descripción | Improved Industry Standard Parallel 12-Bit Multiplying DAC | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LTC7545A
Improved Industry Standard
Parallel 12-Bit Multiplying DAC
FEATURES
s Improved Direct Replacement for AD7545A
and AD7545
s DNL and INL Over Temperature: ±0.5LSB
s Gain Error: ±1LSB Maximum
s 4-Quadrant Multiplication
s Single 5V or 15V Supply
s Low Power Consumption
s Low Cost
APPLICATI S
s Process Control and Industrial Automation
s Software Controlled Gain Adjustment
s Digitally Controlled Filter and Power Supplies
s Automatic Test Equipment
DESCRIPTIO
The LTC®7545A is a 12-bit multiplying digital-to-analog
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.
TYPICAL APPLICATI
2-Quadrant Multiplying DAC Has Less Than
0.5LSB (Typ) Total Unadjusted Error
VIN
5V
0.1µF
18 19 20
VDD VREF
RFB
OUT1
1
WR 17
CS 16
LTC7545A
AGND
DGND 2
4–15 3
33pF
–
LT®1097
+
VOUT
7545A TA01
Integral Nonlinearity Over Temperature
1.0
0.5
TA = 85°C TA = 25°C
0
TA = –40°C
–0.5
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7545A TA02
1
1 page  
TYPICAL APPLICATIONS N
Unipolar Operation (2-Quadrant Multiplication)
VREF
–10V TO 10V
5V OR 15V
0.1µF
18 19 20
VDD VREF RFB
µP
17 WR
16
CS
1
LTC7545A OUT1
2
AGND
DB11 to DB0 DGND
4–15
3
33pF
–
LT1097
+
LTC7545A
VOUT
0V TO – VREF
7545A TA03
Table 1. Unipolar Binary Code Table
DIGITAL INPUT
BINARY NUMBER
IN DAC LATCH
MSB LSB
ANALOG OUTPUT
VOUT
1111 1111
1000 0000
0000 0000
0000 0000
1111
0000
0001
0000
– VREF (4095/4096)
– VREF (2048/4096) = – VREF/2
– VREF (1/4096)
0V
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LTC7545A.PDF ] | |
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