MAXQ314+ Maxim Integrated Products, MAXQ314+ Datasheet

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MAXQ314+

Manufacturer Part Number
MAXQ314+
Description
IC PWR MEASUREMENT 1PH 10-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAXQ314+

Measurement Error
0.5%
Voltage - I/o High
2.1V
Voltage - I/o Low
0.8V
Current - Supply
6.5mA
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-WQFN, Exposed Pad
Meter Type
Single Phase
For Use With
MAXQ314-KIT - KIT EV REFRNCE DSIGN FOR MAXQ314
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
90-M3124+RBN
19-5031; Rev 0; 11/09
The MAXQ314 is a dedicated power-measurement IC
that collects and calculates voltage, current, power, and
power factor for a single-phase load. The results can
be retrieved by an external master through the internal
I
configure the operation of the MAXQ314 and monitor the
status of operations.
The MAXQ314 performs voltage and current measure-
ments using an integrated ADC that can measure voltage
and current. Other values such as power are calculated
from that data. The MAXQ314 also has an integrated
temperature sensor that provides the die temperature on
demand. The internal current amplifier produces up to
32x gain and the voltage amplifier gain is 1x.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
MAXQ is a registered trademark of Maxim Integrated Products, Inc.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
2
MAXQ314+
C bus. This bus is also used by the external master to
Single-Phase AC Power Monitoring
PART
_______________________________________________________________ Maxim Integrated Products 1
General Description
DGND
AGND
DVDD
AVDD
VN
VP
IL
OPERATING VOLTAGE (V)
Single-Phase Power-Measurement
Applications
TEMP SENSOR
3.0 to 3.6
(AVDD, DVDD)
WATCHDOG
POWER-ON
RISC CPU
MAXQ20
TIMER
16-BIT
RESET
MUX
PGA
BUS
S
S
S
S
S
S
S
S
S
S
S
MAXQ314
High-Performance, Low-Power DSP Core
On-Chip Digital Temperature Sensor
Precision Internal Voltage Reference
Active Power (W), < ±0.5% Error
Reactive Power (VAR), < ±0.7% Error
Apparent Power (VA), < ±0.7% Error
Power Factor, < ±1% Error
Voltage RMS, < ±0.2% Error
Current RMS, < ±0.5% Error
I
Continuous Output of IRMS in Serial or PWM
2
C-Compatible Serial Interface
IC with I
-40NC to +85NC
TEMP RANGE
ADC
SERIAL/PWM
8MHz CLOCK
GENERATOR
INTERFACE
INTERNAL
REFERENCE
INTERNAL
DSP
I
2
C
Ordering Information
2
C Interface
SCL
SDA
A0
A1
A2
AUX
RST
Block Diagram
PIN-PACKAGE
20 TQFN-EP*
Features

Related parts for MAXQ314+

MAXQ314+ Summary of contents

Page 1

... The MAXQ314 also has an integrated temperature sensor that provides the die temperature on demand. The internal current amplifier produces up to 32x gain and the voltage amplifier gain is 1x. Applications Single-Phase AC Power Monitoring PART OPERATING VOLTAGE (V) MAXQ314+ +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad AVDD AGND ...

Page 2

Single-Phase Power-Measurement 2 IC with I C Interface Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Single-Phase Power-Measurement Figure 1. Series Resistors (R ) for Protecting Against High-Voltage Spikes . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

Single-Phase Power-Measurement 2 IC with I C Interface ABSOLUTE MAXIMUM RATINGS Voltage Range on DVDD with Respect to DGND .............................................-0.3V to +4.0V Voltage Range on AVDD with Respect to AGND .............................................-0.3V to +4.0V Voltage Range on AGND with Respect to ...

Page 5

Single-Phase Power-Measurement ELECTRICAL CHARACTERISTICS (continued 3.0V to 3.6V +25NC, unless otherwise noted.) (Note 2) AVDD DVDD A PARAMETER SYMBOL Output Low Voltage (AUX) Input Leakage (A0, A1, A2) Input Capacitance (RST, A0, A1, A2) ...

Page 6

Single-Phase Power-Measurement 2 IC with I C Interface BUS CONTROLLER TIMING (V = 3.0V to 3.6V +25NC, unless otherwise noted. Typical values are at V DVDD A PARAMETER SYMBOL Serial Clock Frequency Bus Free Time ...

Page 7

Single-Phase Power-Measurement MAXQ314 Figure 1. Series Resistors (R ) for Protecting Against High-Voltage Spikes S S SDA t F_I2C t LOW SCL t HD:STA t HD:DAT 2 Figure Bus Controller Timing Diagram _______________________________________________________________________________________ IC with I V ...

Page 8

Single-Phase Power-Measurement 2 IC with I C Interface PIN NAME 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 ...

Page 9

Single-Phase Power-Measurement PIN NAME 15 VN Differential Voltage Negative Input 16 VP Differential Voltage Positive Input 19 IL Single-Ended Current Input, Low Frequency N.C. No Connection. Do not connect any signal to this pin Detailed ...

Page 10

Single-Phase Power-Measurement 2 IC with I C Interface Rate and Resets 2 The I C bus is dedicated to communications with the master device. The master device initiates all communi- 2 cations. During transfer, ...

Page 11

Single-Phase Power-Measurement Data and Control Registers All transactions consist of the master writing to or read- ing from data, configuration, or control registers. Each register has an 8-bit address. There are several catego- ries of internal registers; read-only registers return ...

Page 12

Single-Phase Power-Measurement 2 IC with I C Interface Table 2. Register Set NAME P Active power Q Reactive power S Apparent power PAVG Average power VRMS RMS-voltage IRMS RMS-current -16 PF Power factor; LSB = 2 RAWTEMP Temperature sample PA ...

Page 13

Single-Phase Power-Measurement Table 3. DSPCFG Register Detail BIT NAME 1 = disable IL measurements 0 DISIL 0 = enable IL measurements (default) 1 RESERVED Must be set RESERVED Must be set PEC enabled ...

Page 14

Single-Phase Power-Measurement 2 IC with I C Interface Four parameters can be calibrated to optimize system performance. Conversion to Physical Units The output registers are in “meter” units, and need to be scaled with the input circuits to yield meaningful ...

Page 15

Single-Phase Power-Measurement SYNC SAMPLE DATA ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 16 2009 Maxim Integrated Products © ...

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