78M6613-IM/F Maxim Integrated Products, 78M6613-IM/F Datasheet

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78M6613-IM/F

Manufacturer Part Number
78M6613-IM/F
Description
IC AC PWR MON APPLIANCES 32-QFN
Manufacturer
Maxim Integrated Products
Type
Energy Measurementr
Datasheet

Specifications of 78M6613-IM/F

Core
80515
Core Architecture
80515
Data Bus Width
8 bit
Data Ram Size
2 KB
Device Million Instructions Per Second
5 MIPS
Interface Type
ICE, UART
Maximum Clock Frequency
5 MHz
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Number Of Programmable I/os
10
Number Of Timers
2
On-chip Adc
22 bit
Operating Supply Voltage
3 V to 3.6 V
Package / Case
QFN-32
Processor Series
80515
Program Memory Size
32 KB
Program Memory Type
Flash
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Single Converter Technology is a registered trademark of Maxim
Integrated Products, Inc.
DS_6613_018
DESCRIPTION
The 78M6613 is a highly integrated IC for simplified
implementation of single-phase AC power measurement
into
applications with embedded AC load monitoring and
control. It is packaged in a small, 5mm x 5mm, 32-pin QFN
package for optimal space savings.
At the measurement interface, the device provides four
analog inputs for interfacing to voltage and current sensors.
Voltages from the sensors are fed to our Single Converter
Technology® that uses a 22-bit delta-sigma ADC,
independent
temperature
references to provide better than 0.5% power measurement
accuracy over a wide 2000:1 dynamic range.
The integrated MPU core and 32 KB of flash memory
provides a flexible means of configuration, post-processing,
data formatting, and interfacing to any host processor
through the UART interface and/or DIO pins. Complete
application firmware is available and can be preloaded into
the IC during manufacturing test. Alternatively, a complete
array of ICE, development tools, and programming libraries
are available to allow customization for each application.
Rev. 1.1
LIVE
NEUT
power
32 kHz
A Maxim Integrated Products Brand
supplies,
32-bit
compensation,
VOLTAGE REF
compute
XIN
XOUT
VREF
CONVERTER
A0
A1
A2
A3
OSC/PLL
SENSOR
TEMP
smart
and
TERIDIAN
78M6613
appliances,
2KB RAM
COMPUTE
© 2011 Teridian Semiconductor Corporation
ENGINE
TIMERS
FLASH
Isolated Supply
32KB
engine
32-bit
80515
V3P3
Earth Ground
MPU
precision
SERIAL PORT
REGULATOR
DIO 14-17, 19
DIO, PULSE
GND
DIO 4-8
(CE),
ICE
TX
RX
ICE_E
and ot her
voltage
digital
V3P3
GND
FEATURES
• < 0.5% Wh Accuracy Over Wide 2000:1
• Voltage Reference < 40ppm/°C
• Four Sensor Inputs—V3P3A Referenced
• 22-Bit Delta-Sigma ADC with Independent
• 8-Bit MPU (80515), One Clock Cycle per
• 32KB Flash with Security
• Integrated In-Circuit Emulator (ICE) Interface
• 32kHz Time Base with Hardware Watchdog
• UART Interface and Up to 10 General-
• Packaged in a RoHS-Compliant (6/6)
• Complete Application Firmware Provides:
Current Range and Over Temperature
o
o
o
o
o
o
o
32-Bit Compute Engine (CE)
Instruction with 2KB MPU XRAM
for MPU Debug
Timer
Purpose 5V Tolerant I/O Pins
Lead(Pb)-Free, 32-Pin QFN (5mm x 5mm)
True RMS Calculations for Current,
Voltage, Line Frequency, Real Power,
Reactive Power, Apparent Power, and
Power Factor
Accumulated Watt-Hours, Kilowatt-Hours
Intelligent Switch Control at Zero
Crossings
Digital Temperature Compensation
Phase Compensation (±15°)
Quick Calibration Routines
46–64Hz Line Frequency Range with
Same Calibration
AC Power Measurement IC
DATA SHEET
Single-Phase
78M6613
March 2011
1

Related parts for 78M6613-IM/F

78M6613-IM/F Summary of contents

Page 1

... A Maxim Integrated Products Brand DS_6613_018 DESCRIPTION The 78M6613 is a highly integrated IC for simplified implementation of single-phase AC power measurement into power supplies, smart applications with embedded AC load monitoring and control packaged in a small, 5mm x 5mm, 32-pin QFN package for optimal space savings. At the measurement interface, the device provides four analog inputs for interfacing to voltage and current sensors ...

Page 2

... Data Sheet 1 Hardware Description .................................................................................................................... 5 1.1 Hardware Overview ................................................................................................................ 5 1.2 Analog Front End (AFE) .......................................................................................................... 6 1.2.1 Input Multiplexer.......................................................................................................... 6 1.2.2 A/D Converter (ADC) .................................................................................................. 6 1.2.3 FIR Filter ..................................................................................................................... 6 1.2.4 Voltage References ..................................................................................................... 6 1.2.5 Temperature Sensor ................................................................................................... 7 1.2.6 Functional Description ................................................................................................. 7 1.3 Digital Computation Engine (CE) ............................................................................................ 8 1.4 80515 MPU Core .................................................................................................................... 8 1 ...

Page 3

... Figure 9: Current Transformer ............................................................................................................... 14 Figure 10: Connections for the RX Pin ................................................................................................... 16 Figure 11: 78M6613 External Reset Behavior........................................................................................ 17 Figure 12: MAX810S Connections to the 78M6613 ................................................................................ 17 Figure 13: Reset Generator Based On TL431 Shunt Regulator .............................................................. 18 Figure 14: External Components for the Emulator Interface .................................................................. 18 Figure 15: Wh Accuracy 120 V/60 Hz and Room Temperature Using a 4 mΩ ...

Page 4

... Data Sheet VBIAS A3 MUX TEMP VREF MUX CROSS MUX CK32 CTRL OSC RTCLK (32KHz) XIN (32KHz) XOUT CKTEST 4.9152MHz CK_2X CK_GEN MUX_SYNC CKCE <4.9152MHz TEST TEST MODE CE CONTROL CKMPU <4.9152MHz RX UART TX 4 VREF ∆Σ ADC CONVERTER VBIAS - V3P3 + VREF ...

Page 5

... A variety of I/O pins Current sensor technologies supported include Current Transformers (CT) and Resistive Shunts typical application, the 32-bit compute engine (CE) of the 78M6613 sequentially processes the samples from the voltage inputs on pins A0, A1, A2, A3 and performs calculations to measure active energy (Wh), reactive energy (VARh), A measurements are then accessed by the MPU, processed further and output using the peripheral interfaces available to the MPU ...

Page 6

... Data Sheet 1.2 Analog Front End (AFE) The AFE of the 78M6613 is comprised of an input multiplexer, a delta-sigma A/D converter and a voltage reference. 1.2.1 Input Multiplexer The input multiplexer supports up to four input signals that are applied to pins A0, A1, A2 and A3 of the device ...

Page 7

... DS_6613_018 1.2.5 Temperature Sensor The 78M6613 includes an on-chip temperature sensor implemented as a bandgap reference used to determine the die temperature. The MPU reads the temperature sensor output during alternate multiplexer cycles. The primary use of the temperature data is to determine the magnitude of compensation required to offset the thermal drift in the system (see Compensation) ...

Page 8

... UART The 78M6613 includes a UART that can be programmed to communicate with a variety of external devices. The UART is a dedicated 2-wire serial interface, which can communicate with an external device 38,400 bits/s. All UART transfers are programmable for parity enable, parity, 2 stop bits/1 stop bit and XON/XOFF options for variable communication baud rates from 300 to 38,400 bps ...

Page 9

... CE, the MPU copies these images to their respective locations. Allocated Flash space for the CE program cannot exceed 1024 words (2 KB). MPU RAM: The 78M6613 includes 2KB of static RAM memory on-chip (XRAM) plus 256B of internal RAM in the MPU core. The 2KB of static RAM are used for data storage during normal MPU operations. ...

Page 10

... Data Sheet 1.5.5 Digital I/O The device includes pins of general purpose digital I/O. When configured as inputs, these pins are 5V compatible (no current-limiting resistors are needed). On reset or power-up, all DIO pins are inputs until they are configured for the desired direction under MPU control. ...

Page 11

... Thus, simple RMS measurements are inherently inaccurate, and true RMS measurements must be utilized. A modern solid-state electricity Power and Energy Measurement IC such as the Teridian 78M6613 functions by emulating the integral operation above, i.e. it processes current and voltage samples through an ADC at a constant frequency. As long as the ADC ...

Page 12

... Data Sheet 2.2 Reset Behavior Reset Mode: When the RESET pin is pulled high all digital activity stops. The oscillator continues to run. Additionally, all I/O RAM bits are set to their default states. Once initiated, the reset mode will persist until the reset timer times out. This will occur in 4096 CK32 clock cycles (32768 Hz clock cycles from PLL block) after RESET goes low, at which time the MPU will begin executing its preboot and boot sequences from address 00 ...

Page 13

... MPU to indicate when the CE is actively processing data and when the CE is updating data to the output region of the CE DRAM. ADC SAMPLES Mux Ctrl. I/O RAM (CONFIGURATION RAM) Rev. 1.1 CONTROL DATA CE_BUSY CE XFER_BUSY INTERRUPTS Figure 6: MPU/CE Communication 78M6613 Data Sheet MPU SERIAL (UART) DIO 13 ...

Page 14

... Connection of Sensors (CT, Resistive Shunt) Figure 7, Figure 8, and Figure 9 current transformers are connected to the voltage and current inputs of the 78M6613. 14 show how resistive voltage dividers, resistive current shunts, and Figure 7: Resistive Voltage Divider Figure 8: Resistive Current Shunt Figure 9: Current Transformer DS_6613_018 ...

Page 15

... GAIN _ ADJ In a power and energy measurement unit, the 78M6613 is not the only component contributing to temperature dependency. A whole range of components (e.g. current transformers, resistor dividers, power sources, filter capacitors) will contribute temperature effects. Since the output of the on-chip temperature sensor is accessible to the MPU, temperature-compensation mechanisms with great flexibility are possible (e ...

Page 16

... Reset Function and Reset Pin Connections The 78M6613 requires an external reset circuit to drive the RESET input pin. The reset is used to prevent the 78M6613 from operating at supply voltages outside the recommended operating conditions. Reset ensures the device is set to a known set of initial conditions and that it begins executing instructions from a predetermined starting address ...

Page 17

... The RESET signal can be generated in a number of different ways. For example, a voltage supervisory device such as Maxim’s MAX810S function as shown in Figure 12. MAX810S Vcc RST GND Figure 12: MAX810S Connections to the 78M6613 Rev. 1.1 > 1 µs > 1 µs can implement the reset/supply voltage supervisory V3P3 RESET 78M6613 ...

Page 18

... Data Sheet An alternate solution using discrete components can be used. Figure 13 shows an implementation using a shunt regulator and two transistors. Figure 13: Reset Generator Based On TL431 Shunt Regulator As long as V3P3 is below the 2.79V threshold set by the voltage divider of R1 and R2, U1 will not conduct current, the base of Q2 will be at the same potential as its emitter will be turned off ...

Page 19

... DS_6613_018 3.8 Crystal Oscillator The oscillator of the 78M6613 drives a standard 32.768 kHz watch crystal. The oscillator has been designed specifically to handle these crystals and is compatible with their high impedance and limited power handling capability. Good layouts will have XIN and XOUT shielded from each other. ...

Page 20

... Data Sheet 4 Electrical Specifications 4.1 Absolute Maximum Ratings Supplies and Ground Pins: V3P3 GNDD, GNDA Analog Output Pins: VREF Analog Input Pins: A0, A1, A2, A3 XIN, XOUT All Other Pins: Configured as Digital Inputs Configured as Digital Outputs All other pins Operating junction temperature (peak, 100 ms) ...

Page 21

... Condition Normal Operation Condition IH IL VIN=0V, ICE_E=1 VIN=V3P3 Condition LOAD LOAD LOAD LOAD 78M6613 Data Sheet Value Unit ≥0.1±10% ≥0.1±10% 32.768 27±10% 27±10% Min Typ Max 3.0 3.3 3.6 -40 +85 Min Typ Max 2 0.8 10 100 10 ...

Page 22

... Data Sheet Supply Current 4.4.3 Parameter V3P3A + V3P3D current V3P3A + V3P3D current vs. MPU clock frequency V3P3A + V3PD current, Write Flash 4.4.4 Crystal Oscillator Parameter Maximum Output Power to Crystal XIN to XOUT Capacitance Capacitance to GND XIN XOUT 4.4.5 VREF Unless otherwise specified, VREF_DIS=0 ...

Page 23

... Vin=65 Hz Vin=65 Hz FIR_LEN=0 FIR_LEN=1 FIR_LEN=0 FIR_LEN=1 Vin=200 mV pk V3P3=3.0V, 3.6V Condition FIR_LEN=0 FIR_LEN=1 FIR_LEN=0 FIR_LEN -40ºC to +85ºC A    25°  78M6613 Data Sheet Min Typ Max Unit mV -250 250 peak 1 1 -10 10 μV/V dB - kΩ 1.7 Ω/°C ...

Page 24

... Data Sheet 4.5 Timing Specifications 4.5.1 RAM and Flash Memory Parameter CE DRAM wait states Flash write cycles Flash data retention Flash data retention Flash byte writes between page or mass erase operations 4.5.2 RESET Parameter Reset pulse fall time Reset pulse width ...

Page 25

... Figure 15: Wh Accuracy 120 V/60 Hz and Room Temperature Using a 4 mΩ Relative Accuracy over Temperature -10 -20 -30 -60 -40 Figure 16: Typical Measurement Accuracy over Temperature Relative to 25°C Rev. 1.1 Wh Accuracy (%) 0.1 1 Current Shunt - Temperature [°C] 78M6613 Data Sheet Wh Accuracy (%) 10 Current ( 100 25 ...

Page 26

... Data Sheet 5 Packaging 5.1 Pinout VREF 5 XIN 6 TEST 7 XOUT Figure 17: 32-Pin QFN Pinout DS_6613_018 24 ICE_E 23 GNDD 22 DIO4 21 DIO19 20 DIO16 19 DIO15 18 DIO14 17 DIO17 Rev. 1.1 ...

Page 27

... TOP VIEW 0.2 MIN. 0.35 / 0.45 NOTE: Rev. 1.1 2.5 3.0 / 3.2 0.18 / 0.3 1.5 / 1.6 0.5 BOTTOM VIEW Controlling Figure 18: Package Outline (QFN 32) 78M6613 Data Sheet 0.85 NOM. 0.9MAX. / 0.00 / 0.005 0.20 REF. SEATING SIDE VIEW CHAMFERED 0. dimensions are in mm. ...

Page 28

... Data Sheet 5.3 Recommended PCB Land Pattern for the QFN-32 Package x Symbol Description e Lead pitch See Note Note 1: Do not place unmasked vias in region denoted by dimension “d”. Note 2: Soldering of bottom internal pad not required for proper operation of either commercial or industrial temperature rated versions ...

Page 29

... Voltage Reference for the ADC. This pin is left unconnected. Never use as an external reference. Crystal Inputs kHz crystal should be connected across these pins. Typically capacitor is also connected from each pin to GND important to minimize the capacitance between these pins. See the crystal manufacturer datasheet for details. 78M6613 Data Sheet 29 ...

Page 30

... Data Sheet 6.3 Digital Pins Name Type Circuit DIO4 DIO5 DIO6 DIO7 DIO8 I DIO14 DIO15 DIO16 DIO17 DIO19 E_RXTX, I E_RST E_TCLK O 4 ICE_E I 2 CKTEST O 4 TMUXOUT O 4 RESET TEST I 7 Pin types Power Output Input, I/O = Input/Output The circuit number denotes the equivalent circuit, as specified on the following page. ...

Page 31

... Internal Pull-Down V3P3 Analog To Input MUX Pin GND Analog Input Equivalent Circuit Type 5: ADC Input Figure 20: I/O Equivalent Circuits 78M6613 Data Sheet V3P3 Digital CMOS Input Input Pin GND Digital Input Type 3: Standard Digital Input or pin configured as DIO Input V3P3 ...

Page 32

... Contact Information For more information about Maxim products or to check the availability of the 78M6613, contact technical support at www.maxim-ic.com/support. 32 Option Bulk Tape & Reel *Programmed, Bulk *Programmed, Tape & Reel DS_6613_018 Ordering Number IC Marking 78M6613-IM/F 78M6613-IMR/F 78M6613-IM 78M6613-IM/F/P 78M6613-IMR/F/P Rev. 1.1 ...

Page 33

... 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  2011 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products. 78M6613 Data Sheet PAGES CHANGED  30 ...

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