AD636KDZ datasheet(3/16 Pages) AD

Part #	AD636KDZ

Description	Low Level, True RMS-to-DC Converter

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Manufacturer	AD [Analog Devices]

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Data Sheet

AD636

Rev. E | Page 3 of 16

SPECIFICATIONS

@ 25°C, +VS = +3 V, and −VS = –5 V, unless otherwise noted.1

Table 1.

Model

AD636J

AD636K

Unit

Min

Typ

Max

Min

Typ

Max

TRANSFER FUNCTION

( )2

IN

OUT

V

avg

V

×

=

( )2

IN

OUT

V

avg

V

×

=

CONVERSION ACCURACY

Total Error, Internal Trim2, 3

±0.5 ± 1.0

±0.2 ± 0.5

mV ± % of

reading

vs. Temperature, 0°C to +70°C

±0.1 ± 0.01

±0.1 ± 0.005

mV ± % of

reading/°C

vs. Supply Voltage

±0.1 ± 0.01

mV ± % of

reading/V

DC Reversal Error at 200 mV

±0.2

±0.1

% of reading

Total Error, External Trim2

±0.3 ± 0.3

± 0.1 ± 0.2

mV ± % of

reading

ERROR VS. CREST FACTOR4

Crest Factor 1 to 2

Specified Accuracy

Crest Factor = 3

−0.2

% of reading

Crest Factor = 6

−0.5

% of reading

AVERAGING TIME CONSTANT

25

ms/μF of CAV

INPUT CHARACTERISTICS

Signal Range, All Supplies

Continuous RMS Level

0 to 200

mV rms

Peak Transient Inputs

+3 V, −5 V Supply

±2.8

V p-p

±2.5 V Supply

±2.0

V p-p

±5 V Supply

±5.0

V p-p

Maximum Continuous

Nondestructive

Input Level (All Supply Voltages)

±12

V p-p

Input Resistance

5.33

6.67

8

5.33

6.67

8

kΩ

Input Offset Voltage

±0.5

±0.2

mV

FREQUENCY RESPONSE3, 5

Bandwidth for 1% Additional

Error (0.09 dB)

VIN = 10 mV

14

kHz

VIN = 100 mV

90

kHz

VIN = 200 mV

130

kHz

±3 dB Bandwidth

VIN = 10 mV

100

kHz

VIN = 100 mV

900

kHz

VIN = 200 mV

1.5

MHz

OUTPUT CHARACTERISTICS3

Offset Voltage, VIN = COM

±0.5

±0.2

mV

vs. Temperature

±10

μV/°C

vs. Supply

±0.1

mV/V

Voltage Swing

+3 V, −5 V Supply

0.3

0 to 1.0

0.3

0 to 1.0

V

±5 V to ±16.5 V Supply

0.3

0 to 1.0

0.3

0 to 1.0

V

Output Impedance

8

10

12

8

10

12

kΩ

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