AD736JRZ-RL Datasheet AD736JNZ, AD736JRZ, AD736ARZ | P7-P9

AD736 Data Sheet

Rev. I | Page 6 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

C

1

V

IN

2

C

F

3

–V

S

4

COM

8

+V

S

7

OUTPUT

6

C

AV

5

AD736

TOP VIEW

(Not to Scale)

00834-025

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 C

C

Coupling Capacitor. If dc coupling is desired at Pin 2, connect a coupling capacitor to this pin. If the coupling at

Pin 2 is ac, connect this pin to ground. Note that this pin is also an input, with an input impedance of 8 kΩ.

Such an input is useful for applications with high input voltages and low supply voltages.

2 V

IN

High Input Impedance Pin.

3 C

F

Connect an Auxiliary Low-Pass Filter Capacitor from the Output.

4 −V

S

Negative Supply Voltage if Dual Supplies Are Used, or Ground if Connected to a Single-Supply Source.

5 C

AV

Connect the Averaging Capacitor Here.

6 OUTPUT DC Output Voltage.

7

+V

S

Positive Supply Voltage.

8 COM Common.

Data Sheet AD736

Rev. I | Page 7 of 20

TYPICAL PERFORMANCE CHARACTERISTICS

–0.5

–0.3

–0.1

0

0.3

0.1

0.5

0.7

0

42

8

6 12

14

10 16

SUPP

L

Y VOLTAGE (±V)

ADDITIONAL ERROR (% of Reading)

V

IN

= 200mV rms

1kHz SINE WAVE

C

AV

= 100µF

C

F

= 22µF

00834-002

Figure 3. Additional Error vs. Supply Voltage

0

2

4

6

8

12

10

14

16

0

42 86 12 1410 16

SUPPLY VOLTAGE (±V)

PEAK INPUT BEFORE CLIPPING (V)

PIN 1

PIN 2

DC-COUPLED

00834-003

Figure 4. Maximum Input Level vs. Supply Voltage

0

4

2

10

16

14

12

8

6

0 2 4 6 108 12 14 16

SUPPLY VOLTAGE (±V)

PEAK BUFFER OUTPUT (V)

1kHz SINE WAVE INPUT

00834-004

Figure 5. Peak Buffer Output vs. Supply Voltage

100µV

1mV

10mV

1V

100mV

10V

0.1 1 10010 1000

–3dB FREQUENCY (kHz)

INPUT LEVEL (rms)

SINEWAVEINPUT, V

S

=±5V,

C

AV

= 22µF, C

F

= 4.7µF, C

C

= 22µF

1% ERROR

–3dB

10% ERROR

00834-005

Figure 6. Frequency Response Driving Pin 1

100µV

1mV

10mV

1V

100mV

10V

0.1 1 10010 1000

–3dB FREQUENCY (kHz)

INPUT LEVEL (rms)

SINEWAVEINPUT,

V

S

=±5V,

C

AV

= 22µF, C

F

= 4.7µF, C

C

= 22µF

1% ERROR

10% ERROR

–3dB

00834-006

Figure 7. Frequency Response Driving Pin 2

C

AV

= 100µF

C

AV

= 250µF

0

1

2

3

4

5

6

1 2

3 4 5

CREST FACTOR (V

PEAK

/V rms)

ADDITIONAL ERROR (% of Reading)

C

AV

= 10µF

C

AV

= 33µF

3ms BURST OF 1kHz =

3 CYCLES

200mV rms SIGNAL

V

S

= ±5V

C

= 22µF

C

F

= 100µF

00834-007

Figure 8. Additional Error vs. Crest Factor with Various Values of C

AV

AD736 Data Sheet

Rev. I | Page 8 of 20

–0.8

–0.6

–0.2

–0.4

0

0.4

0.2

0.6

0.8

–60 –20–40

200 60

80

100 120

40 140

TEMPERATURE (°C)

ADDITIONAL ERROR (% of Reading)

V

IN

= 200mV rms

1kHz SINE WAVE

C

AV

= 100

µF

C

F

= 22

µF

V

S

= ±5V

00834-008

Figure 9. Additional Error vs. Temperature

100

200

300

400

500

600

0 0.2 0.4

0.6 0.8 1.0

rms INPUT LEVEL (V)

DC SUPPLY CURRENT (µA)

V

IN

= 200mV rms

1kHz SINE WAVE

C

AV

= 100µF

C

F

= 22µF

V

S

= ±5V

00834-009

Figure 10. DC Supply Current vs. rms Input Level

10µV

100µV

1mV

10mV

100 1k 10k 100k

–3dB FREQUENCY (Hz)

INPUT LEVEL (rms)

V

IN

= 1kHz

SINE WAVE INPUT

AC-COUPLED

V

S

= ±5V

00834-010

Figure 11. RMS Input Level (Pin 2) vs. −3 dB Frequency

–2.5

–2.0

–1.5

–1.0

–0.5

0

0.5

1.0

10mV

100mV

1V 2V

INPUT LEVEL (rms)

ERROR (% of Reading)

V

IN

= SINE WAVE @ 1kHz

C

AV

= 22µF, C

C

= 47µF,

C

F

= 4.7µF, V

S

= ±5V

00834-011

Figure 12. Error vs. RMS Input Voltage (Pin 2),

Output Buffer Offset Is Adjusted to Zero

1

10

100

10 100 1k

FREQUENCY (Hz)

C

AV

(µF)

–1%

–0.5%

V

IN

= 200mV rms

C

= 47µF

C

F

= 47µF

V

S

= ±5V

00834-012

Figure 13. C

AV

vs. Frequency for Specified Averaging Error

1mV

10mV

100mV

1V

1 10 100 1k

FREQUENCY (Hz)

INPUT LEVEL (rms)

–0.5%

–1%

V

IN

SINE WAVE

AC-COUPLED

C

AV

= 10µF, C

C

= 47µF,

C

F

= 47µF, V

S

= ±5V

00834-013

Figure 14. RMS Input Level vs. Frequency for Specified Averaging Error

AD736JRZ-RL

AD736JRZ-RL

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