AD645 AD [Analog Devices], AD645 Datasheet - Page 3

• Manufacturer Part Number: AD645
• Description: Low Noise, Low Drift FET Op Amp
• Manufacturer: AD [Analog Devices]

ABSOLUTE MAXIMUM RATINGS
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite
Differential Input Voltage . . . . . . . . . . . . . . . . . . +V
Storage Temperature Range (H) . . . . . . . . . –65 C to +150 C
Storage Temperature Range (N) . . . . . . . . . –65 C to +125 C
Operating Temperature Range
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD645 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
Model
AD645JN
AD645KN
AD645AH
AD645BH
AD645CH
AD645SH/883B
NOTES
1
2
Figure 4. Typical Distribution of Input
Offset Voltage (1855 Units)
Chips are also available.
N = Plastic Mini-DIP; H = Metal Can.
REV. B
8-Pin Header Package . . . . . . . . . . . . . . . . . . . . . . 500 mW
8-Pin Mini-DIP Package . . . . . . . . . . . . . . . . . . . . 750 mW
AD645J/K . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 C to +70 C
800
700
600
500
400
300
200
100
0
–1.0
1
Figure 3. AD645 Offset Null Configuration
–0.8
INPUT OFFSET VOLTAGE – mV
–0.6
–0.4 –0.2 0.0
Temperature Range Package Option
0 C to +70 C
0 C to +70 C
– 40 C to +85 C
– 40 C to +85 C
– 40 C to +85 C
– 55 C to +125 C
ORDERING GUIDE
3
2
–V
4
0.2
2
AD645
S
(@ T
0.4
+V
7
S
1
0.6
10k
A
= +25 C)
0.8
V
OS
5
1
1.0
ADJUST
6
N-8
N-8
H-08A
H-08A
H-08A
H-08A
Figure 5. Typical Distribution of Input
Bias Current (576 Units)
120
110
100
90
80
70
60
50
40
30
20
10
0
0.0
S
0.5
and –V
INPUT BIAS CURRENT – pA
1.0
18 V
V
2
S
S
1.5
–3–
2.0
Lead Temperature Range
NOTES
1
2
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated
in the operational section of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device
reliability.
Stresses above those listed under “Absolute Maximum Ratings” may cause
Thermal Characteristics:
8-Pin Plastic Mini-DIP Package:
8-Pin Header Package:
AD645A/B/C . . . . . . . . . . . . . . . . . . . . . . . –40 C to +85 C
AD645S . . . . . . . . . . . . . . . . . . . . . . . . . . –55 C to +125 C
(Soldering 60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . +300 C
2.5
3.0
3.5
METALIZATION PHOTOGRAPH
4.0
Dimensions shown in inches and (mm).
Contact factory for latest dimensions.
JA
Figure 6. Typical Distribution of 0.1 Hz
to 10 Hz Voltage Noise (202 Units)
= 200 C/Watt
25
20
15
10
5
0
0.4
JA
INPUT VOLTAGE NOISE – V p-p
= 100 C/Watt
0.6
WARNING!
0.8
1.0
ESD SENSITIVE DEVICE
1.2
AD645
1.4
1.6
1.8