AD637
NOTES
1Accuracy specified 0-7 V rms dc with AD637 connected as shown in Figure 2.
2Nonlinearity is defined as the maximum deviation from the straight line connecting the readings at 10 mV and 2 V.
3Error vs. crest factor is specified as additional error for 1 V rms.
4Input voltages are expressed in volts rms. % are in % of reading.
5With external 2 kΩ pull down resistor tied to –VS.
Specifications subject to change without notice.
Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min
and max specifications are guaranteed, although only those shown in boldface are tested on all production units.
ABSOLUTE MAXIMUM RATINGS
ORDERING GUIDE
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 V
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V dc
Internal Quiescent Power Dissipation . . . . . . . . . . . . 108 mW
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . Indefinite
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 10 secs) . . . . . . . +300°C
Rated Operating Temperature Range
AD637J, K . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
AD637A, B . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
AD637S, 5962-8963701CA . . . . . . . . . . . –55°C to +125°C
Temperature
Range
Package
Description
Package
Option
Model
AD637AR
AD637BR
AD637AQ
AD637BQ
AD637JD
AD637JD/+
AD637KD
AD637KD/+
AD637JQ
–40°C to +85°C SOIC
–40°C to +85°C SOIC
–40°C to +85°C Cerdip
–40°C to +85°C Cerdip
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
R-16
R-16
Q-14
Q-14
Side Brazed Ceramic DIP D-14
Side Brazed Ceramic DIP D-14
Side Brazed Ceramic DIP D-14
Side Brazed Ceramic DIP D-14
Cerdip
Cerdip
SOIC
SOIC
SOIC
SOIC
Q-14
Q-14
R-16
R-16
R-16
R-16
AD637KQ
AD637JR
AD637JR-REEL
AD637JR-REEL7 0°C to +70°C
AD637KR
0°C to +70°C
AD637SD
–55°C to +125°C Side Brazed Ceramic DIP D-14
–55°C to +125°C Side Brazed Ceramic DIP D-14
AD637SD/883B
AD637SQ/883B
AD637SCHIPS
–55°C to +125°C Cerdip
0°C to +70°C Die
Q-14
5962-8963701CA* –55°C to +125°C Cerdip
Q-14
*A standard microcircuit drawing is available.
FILTER/AMPLIFIER
CAV
+V
BUFF OUT
ONE QUADRANT
SQUARER/DIVIDER
24k⍀
S
BUFF IN
BUFFER
AMPLIFIER
A5
RMS
OUT
A4
I
4
dB
OUT
I
1
24k⍀
COM
Q4
Q1
ABSOLUTE VALUE VOLTAGE –
CURRENT CONVERTER
CS
Q5
BIAS
DEN
INPUT
I
24k⍀
Q2
Q3
A3
3
6k⍀
6k⍀
OUTPUT
OFFSET
A2
12k⍀
125⍀
AD637
V
IN
A1
–V
S
Figure 1. Simplified Schematic
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 AD637 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.
WARNING!
ESD SENSITIVE DEVICE
REV. E
–3–