AD637B AD [Analog Devices], AD637B Datasheet - Page 3

• Manufacturer Part Number: AD637B
• Description: High Precision, Wide-Band RMS-to-DC Converter
• Manufacturer: AD [Analog Devices]

REV. E
NOTES
1
2
3
4
5
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
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
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.
Accuracy specified 0-7 V rms dc with AD637 connected as shown in Figure 2.
Nonlinearity is defined as the maximum deviation from the straight line connecting the readings at 10 mV and 2 V.
Error vs. crest factor is specified as additional error for 1 V rms.
Input voltages are expressed in volts rms. % are in % of reading.
With external 2 k pull down resistor tied to –V
AD637J, K . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 C to +70 C
AD637A, B . . . . . . . . . . . . . . . . . . . . . . . . –40 C to +85 C
AD637S, 5962-8963701CA . . . . . . . . . . . –55 C to +125 C
BUFF OUT
BUFF IN
V
IN
ABSOLUTE VALUE VOLTAGE –
12k
CURRENT CONVERTER
24k
A1
6k
S
A5
.
6k
Figure 1. Simplified Schematic
AMPLIFIER
BUFFER
I
1
A2
SQUARER/DIVIDER
–3–
ONE QUADRANT
Q1
Q2
Model
AD637AR
AD637BR
AD637AQ
AD637BQ
AD637JD
AD637JD/+
AD637KD
AD637KD/+
AD637JQ
AD637KQ
AD637JR
AD637JR-REEL
AD637JR-REEL7
AD637KR
AD637SD
AD637SD/883B
AD637SQ/883B
AD637SCHIPS
5962-8963701CA* –55 C to +125 C Cerdip
*A standard microcircuit drawing is available.
Q3
Q4
I
4
A3
125
Temperature
Range
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 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
0 C to +70 C
0 C to +70 C
0 C to +70 C
–55 C to +125 C Side Brazed Ceramic DIP D-14
–55 C to +125 C Side Brazed Ceramic DIP D-14
–55 C to +125 C Cerdip
0 C to +70 C
FILTER/AMPLIFIER
ORDERING GUIDE
Q5
A4
24k
I
3
AD637
24k
BIAS
WARNING!
Package
Description
SOIC
SOIC
Cerdip
Cerdip
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
Die
COM
DEN
INPUT
OUTPUT
OFFSET
CAV
+V
RMS
OUT
OUT
CS
–V
dB
ESD SENSITIVE DEVICE
S
S
AD637
Package
Option
R-16
R-16
Q-14
Q-14
Q-14
Q-14
R-16
R-16
R-16
R-16
Q-14
Q-14