ADE7761

Rev. A | Page 9 of 28

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

ADE7761

TOP VIEW

(Not to Scale)

S0

12

S1

11

1

F1

20

2

F2

19

3

CF

18

4

DGND

17

5

REVP

16

6

FAULT

15

MISCAL

7

RCLKIN

14

AGND

8

INT

13

Figure 3. Pin Configuration (SSOP)

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

Power Supply. This pin provides the supply voltage for the digital circuitry in the ADE7761. The supply

voltage should be maintained at 5 V ± 5% for specified operation. This pin should be decoupled with a

10 µF capacitor in parallel with a ceramic 100 nF capacitor.

2, 3

Analog Inputs for Channel 1 (Current Channel). These inputs are fully differential voltage inputs with

maximum signal level at these pins is ±1 V with respect to AGND. Both inputs have internal ESD

protection circuitry, and an overvoltage of ±6 V can also be sustained on these inputs without risk of

permanent damage.

4

±1 V with respect to AGND. The input has internal ESD protection circuitry, and an overvoltage of ±6 V

can also be sustained on these inputs without risk of permanent damage. The input should be directly

connected to the burden resistor and held at a fixed potential,that is, AGND. See the Analog Inputs

section.

5

±1 V with respect to AGND. The input has internal ESD protection circuitry, and an overvoltage of ±6 V

can also be sustained on these inputs without risk of permanent damage. The input should be held at a

fixed potential, that is, AGND. See the Analog Inputs section.

6

Analog Inputs for Channel 2 (Voltage Channel). This input is fully differential voltage input with

maximum signal level at these pins is ±1 V with respect to AGND. This input has internal ESD protection

circuitry, and an overvoltage of ±6 V can also be sustained on these inputs without risk of permanent

damage.

7

MISCAL

Analog Input for Missing Neutral Calibration. This pin can be used to calibrate the CF-F1-F2 frequencies

in the missing neutral condition. This input is fully differential voltage input with maximum differential

this pin is ±1 V with respect to AGND. This input has internal ESD protection circuitry, and an

overvoltage of ±6 V can also be sustained on these inputs without risk of permanent damage.

8

AGND

This pin provides the ground reference for the analog circuitry in the ADE7761, that is, ADCs and

reference. This pin should be tied to the analog ground plane of the PCB. The analog ground plane is the

ground reference for all analog circuitry such as antialiasing filters, and current and voltage transducers.

For good noise suppression, the analog ground plane should be connected only to the digital ground

plane at the DGND pin.

9

This pin provides access to the on-chip voltage reference. The on-chip reference has a nominal value of

2.5 V ± 8% and a typical temperature coefficient of 30 ppm/°C. An external reference source can also be

connected at this pin. In either case, this pin should be decoupled to AGND with a 1 μF ceramic

capacitor and 100 nF ceramic capacitor.

10

SCF

Select Calibration Frequency. This logic input is used to select the frequency on the calibration output

CF. Table 6 shows how the calibration frequencies are selected.

11, 12

S1, S0

These logic inputs are used to select one of four possible frequencies for the digital-to-frequency

conversion. This offers the designer greater flexibility when designing the energy meter. See the

Selecting a Frequency for an Energy Meter Application section.