ES636_09 View Datasheet(PDF) - Cyrustek corporation

Part Name

Description

Manufacturer

ES636_09

True RMS-to-DC Converters

Cyrustek corporation 

ES636

True RMS-to-DC Converters

z High-Accuracy Adjustments

The accuracy of the ES636 can be further improved by the external trimming scheme as

shown in Figure 4. The input should be grounded and R4 adjusted to give zero output

from pin 6. R1 and R2 are trimmed to give the correct value for a calibrated signal.

Cav

-+

Vin

200Ω

R1

-Vs

Vout

1 VIN

2 Enable

ABSOLUTE

VALUE

+Vs 14

13

3 -Vs

SQUARE

12

DIVIDER

4 CAV

11

5 dB

CURRENT COMMON 10

MIRROR

6 BUF out

7

BUF in

+

BUF

-

9

RL

Iout 8

+Vs

R2

154Ω

470Ω

R3

+Vs

R4

500KΩ

-Vs

Figure 3. External Gain and Offset Trimming Circuit.

Power-Down Function

The ES636 provides a chip-enable pin (Pin 2). To enable the device, this pin must be

connected to –Vs. If it is connected to V+, the device will enter power-down mode. The

9

09/02/16

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