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Teilenummer | AD7545 |
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Beschreibung | 12-Bit/ Buffered/ Multiplying CMOS DAC | |
Hersteller | Intersil Corporation | |
Logo | ||
Gesamt 7 Seiten AD7545
August 1997
12-Bit, Buffered, Multiplying CMOS DAC
Features
• 12-Bit Resolution
• Low Gain T.C. 2ppm/oC (Typ)
• Fast TTL/CMOS Compatible Data Latches
• Single +5V to +15V Supply
• Low Power
• Low Cost
• /883 Processed Versions Available
Ordering Information
TEMP.
PART NUMBER RANGE (oC)
PACKAGE
AD7545JN
0 to 70 20 Ld PDIP
AD7545KN
0 to 70 20 Ld PDIP
AD7545AN
-40 to 85 20 Ld PDIP
AD7545BN
-40 to 85 20 Ld PDIP
PKG.
NO.
E20.3
E20.3
E20.3
E20.3
Description
The AD7545 is a low cost monolithic 12-bit, CMOS
multiplying DAC with on-board data latches. Data is loaded
in a single 12-bit wide word which allows interfacing directly
to most 12-bit and 16-bit bus systems. Loading of the input
latches is under the control of the CS and WR inputs. A logic
low on these control inputs makes the input latches transpar-
ent allowing direct unbuffered operation of the DAC.
Pinout
AD7545
(PDIP)
TOP VIEW
OUT 1 1
AGND 2
DGND 3
DB11 (MSB) 4
DB10 5
DB9 6
DB8 7
DB7 8
DB6 9
DB5 10
20 RFB
19 VREF
18 VDD
17 WR
16 CS
15 DB0 (LSB)
14 DB1
13 DB2
12 DB3
11 DB4
Functional Diagram
AD7545
VREF 19
WR 17
CS 16
RFB
20
12-BIT
MULTIPLYING DAC
12
R
1 OUT1
2 AGND
INPUT DATA LATCHES
12
18 VDD
3 DGND
DB11 - DB0
(PINS 4 - 15)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
10-10
File Number 3108.1
AD7545
VDD
R2 (NOTE)
18 20
C1
33pF
VIN
VDD RFB
OUT 1
1
19 VREF AD7545
AGND
R1*
WR 17
DGND
2
-
+
16 3
ANALOG
CS COMMON
NOTE: REFER TO TABLE 1
DB11 - DB0
(PINS 4 - 15)
FIGURE 5. UNIPOLAR BINARY OPERATION
VOUT
VDD
R2 (NOTE)
R4
20K
18 20
C1
33pF
VIN
VDD RFB
OUT 1
1
19 VREF AD7545
AGND
R1 (NOTE)
WR 17
DB11 DB10 - DB0
2
16 4
3
A1
R3 R5
10K 20K
-
R6 A2
5K +
DGND
CS 11 ANALOG
U1 COMMON
(SEE TEXT)
12
NOTE: FOR VALUES OF R1 AND R2
SEE TABLE 1
DATA INPUT
FIGURE 6. BIPOLAR OPERATION (2’S COMPLEMENT CODE)
VOUT
10-15
6 Page | ||
Seiten | Gesamt 7 Seiten | |
PDF Download | [ AD7545 Schematic.PDF ] |
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