AD650 Просмотр технического описания (PDF) - Analog Devices
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AD650 Datasheet PDF : 20 Pages
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AD650
Data Sheet
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
VOUT 1
+IN 2
14 OFFSET NULL
13 OFFSET NULL
–IN 3 AD650 12 +VS
BIBOLAR OFFSET
CURRENT
–VS
4
5
TOP VIEW
(Not to Scale)
11 ANALOG GND
10 DIGITAL GND
ONE SHOT
CAPACITOR
6
9
COMPARATOR
INPUT
NC 7
8 FOUTPUT
NC = NO CONNECT
Figure 2. D-14, N-14 Pin Configurations
–IN 4
NC 5
BIPOLAR OFFSET
CURRENT
6
NC 7
–VS 8
3 2 1 20 19
PIN 1
INDENTFIER
AD650
TOP VIEW
(Not to scale)
18 +VS
17 NC
16 ANALOG GND
15 NC
14 DIGITAL GND
9 10 11 12 13
Table 2. Pin Function Descriptions
Pin No.
D-14, N-14 P-20
Mnemonic
1
2
VOUT
2
3
+IN
3
4
–IN
4
6
BIPOLAR OFFSET
CURRENT
5
8
–VS
6
9
ONE-SHOT
CAPACITOR
7
1, 5, 7, 10, 11, 15, 17 NC
8
12
FOUTPUT
9
13
COMPARATOR INPUT
10
11
12
13, 14
14
16
18
19, 20
DIGITAL GND
ANALOG GND
+VS
OFFSET NULL
NC = NO CONNECT
Figure 3. P-20 Pin Configuration
Description
Output of Operational Amplifier. The operational amplifier, along with CINT,
is used in the integrate stage of the V to F conversion.
Positive Analog Input.
Negative Analog Input.
On-Chip Current Source. This can be used in conjunction with an external
resistor to remove the operational amplifier’s offset.
Negative Power Supply Input.
The Capacitor, COS, is Connected to This Pin. COS determines the time period
for the one shot.
No Connect.
Frequency Output from AD650.
Input to Comparator. When the input voltage reaches −0.6 V, the one shot is
triggered.
Digital Ground.
Analog Ground.
Positive Power Supply Input.
Offset Null Pins. Using an external potentiometer, the offset of the
operational amplifier can be removed.
Rev. E | Page 6 of 20
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