Single-Phase Power-Measurement

8 ______________________________________________________________________________________

Pin Configuration

Pin Description

MAXQ314

TQFN

(5mm × 5mm)

TOP VIEW

19

20

EP*

*EXPOSED PAD.

+

18

17

7

6

8

9

1

2

AGND

4

5

15

14

12

11

IL

N.C.

N.C.

SDA

SCL

N.C.

3

13

AVDD

16

10 A2

VP

PIN

NAME

FUNCTION

POWER PINS

3

DGND

Digital Ground. AGND and DGND should be connected externally through a single point connection.

4

DVDD

Digital Supply Voltage. Connect AVDD to DVDD externally. Connect a 0.1FF capacitor to DGND.

14

REF

Buffered Reference Output. Connect this pin to AGND through a 1FF capacitor. No other signals should be

connected to this pin.

17

AVDD

Analog Supply Voltage. Connect AVDD to DVDD externally. Connect a 0.1FF capacitor to AGND.

18

AGND

Analog Ground. AGND and DGND should be connected externally through a single point connection.

—

EP

Exposed Pad. Connect to AGND.

COMMUNICATION AND CONTROL PINS

1

AUX

RMS Current Continuous Output. This open-drain pin continuously outputs the value of the most recent 16-bit

RMS current measurement. If the SPCFG.PWMOUT bit is set, the value is instead output in PWM format.

7

SCL

8

SDA

10

A2

Device Selection Address Bits, Input. These bits select the slave address shown in Table 1.

11

A1

12

A0

13

RST

Active-Low Reset Input. The CPU is held in reset when this pin is low. The pin includes pullup current

source and should be driven by an open-drain external source capable of sinking in excess of 4mA.