ADE9112 datasheet(22/55 Pages) AD

22 / 55 page

Data Sheet

ADE9103/ADE9112/ADE9113

TERMINOLOGY

analog.com

Rev. A | 22 of 55

Signal Voltage Range Between the IP and IM,

V1P and V1M, and V2P and V2M Pins

The ADE9103 and ADE9113 contain three fully-differential ADCs,

while the ADE9112 has two fully-differential ADCs, allowing flexibil-

ity in terms of the measurement and how the ADCs are used.

The application typically uses a shunt sensor for the current and

a potential divider for the voltage, which means that the signal

applied at the input can be seen as pseudo differential. The input

range on the current channel represents the peak-to-peak pseudo

differential voltage that must be applied to the ADC to generate

a full-scale response when the IM pin is connected to AGND, Pin

11. The input range on the voltage channel is represented in two

ways: differential, where a signal is applied to both VxP and VxM to

generate a full-scale response, and pseudo differential, where the

signal is only applied to the VxP pin to generated a ½ of full-scale

response when the VxM pin is connected to AGND. When psuedo

differential, the IM and VxM pins are connected to AGND using

antialiasing filters. Figure 28 illustrates the input voltage range

between IP and IM, and Figure 29 illustrates the input voltage range

between V1P and V1M and between V2P and V2M.

Figure 28. Pseudo Differential Input Voltage Range Between the IP and IM

Pins

Figure 29. Pseudo Differential Input Voltage Range Between the V1P and V1M

Pins and Between the V2P and V2M Pins

Maximum VxM and IM Voltage Range

This range represents the maximum allowed voltage at the V1P,

V1M, V2P, IP, and IM pins relative to AGND, Pin 11 on the

ADE9112 and ADE9113, or DGND, Pin 11 on the ADE9103.

Crosstalk

Crosstalk represents the leakage of signals, usually via the capac-

itance between circuits. Crosstalk is measured in the current chan-

nel by setting the IP and IM pins to the local ground reference, Pin

11, supplying a full-scale differential voltage between the V1P and

V1M voltage channel pins and between the V2P and V2M voltage

channel pins, and measuring the output of the current channel. It is

measured in the V1 voltage channel by setting the V1P and V1M

pins to the local ground reference, Pin 11, supplying a full-scale

differential voltage between the IP and IM pins and between the

V2P and V2M pins, and measuring the output of the V1 voltage

channel. Crosstalk is measured in the V2 voltage channel by setting

the V2P and V2M pins to the local ground reference, Pin 11,

supplying a full-scale differential voltage between the IP and IM pins

and between the V1P and V1M pins, and measuring the output of

the V2 voltage channel. Crosstalk is equal to the ratio between the

grounded ADC output value and the ADC full-scale output value.

The ADC outputs are acquired for 2 sec. Crosstalk is expressed in

decibels.

Input Impedance to Ground (DC)

The input impedance to ground represents the impedance meas-

ured at each ADC input pin (IP, IM, V1P, V2P, V1M, and V2M)

with respect to AGND, Pin 11 on the ADE9112 and ADE9103, and

DGND, Pin 11 on the ADE9103.

ADC Offset

The ADC offset error is the average measured ADC output code

with both inputs connected to AGND of the ADE9112 and ADE9113

and DGND of the ADE9103.

ADE9112 数据表(PDF) 22 Page - Analog Devices

ADE9112 数据表(HTML) 22 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

数据表下载