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參數(shù)資料
型號: AD7846KN
廠商: ANALOG DEVICES INC
元件分類: DAC
英文描述: LC2MOS 16-Bit Voltage Output DAC
中文描述: PARALLEL, WORD INPUT LOADING, 7 us SETTLING TIME, 16-BIT DAC, PDIP28
封裝: PLASTIC, MS-011, DIP-28
文件頁數(shù): 5/16頁
文件大小: 615K
代理商: AD7846KN
AD7846
REV. E
–5–
PIN FUNCTION DESCRIPTION
Pin
Mnemonic
Description
1–3
4
DB2–DB0
V
DD
Data I/O pins. DB0 is LSB.
Positive supply for analog circuitry. This is
+15 V nominal.
DAC output voltage pin.
Input to summing resistor of DAC output
amplifier. This is used to select output
voltage ranges. See Table I.
V
REF+
Input. The DAC is specified for V
REF+
= +5 V.
V
REF–
Input. For unipolar operation con-
nect V
REF–
to 0 V and for bipolar operation
connect it to –5 V. The device is specified
for both conditions.
Negative supply for the analog circuitry.
This is –15 V nominal.
Data I/O pins. DB15 is MSB.
Ground pin for digital circuitry.
Positive supply for digital circuitry. This is
+5 V nominal.
R/
W
input. This can be used to load data to
the DAC or to read back the DAC latch
contents.
Chip select input. This selects the device.
Clear input. The DAC can be cleared to
000 . . . 000 or 100 . . . 000. See Table II.
5
6
V
OUT
R
IN
7
V
REF+
8
V
REF–
9
V
SS
10–19 DB15–DB6
20
DGND
21
V
CC
22
R/
W
23
24
CS
CLR
25
LDAC
Asynchronous load input to DAC.
26–28 DB5–DB3
Data I/O pins.
Table I. Output Voltage Ranges
Output Range
V
REF+
+5 V
+5 V
+5 V
+5 V
+5 V
V
REF–
0 V
0 V
–5 V
0 V
–5 V
R
IN
V
OUT
0 V
V
OUT
+5 V
0 V
0 V to +5 V
0 V to +10 V
+5 V to –5 V
+5 V to –5 V
+10 V to –10 V
PIN CONFIGURATIONS
DIP
TOP VIEW
(Not to Scale)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
AD7846
DB11
DB12
DB13
DB14
DB15
V
SS
V
REF
DB2
DB1
DB0
V
DD
V
OUT
V
REF+
R
IN
DB10
DB9
DB8
DB7
DB6
DGND
DB3
DB4
DB5
LDAC
R/
W
CS
CLR
V
CC
PLCC
25
24
23
22
21
20
19
5
6
7
8
9
10
11
4 3 2 1 28 27 26
PIN 1
(Not to Scale)
12 13 14 15 16 17 18
D
LDAC
CLR
CS
R/
W
V
CC
DGND
DB6
V
OUT
R
IN
V
REF+
V
REF
V
SS
DB15
DB14
V
D
D
D
D
D
D
D
D
D
D
D
D
D
AD7846
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