CS5466-ISZR Datasheet CS5466-ISZR, CS5466-IS | P1-P3

http://www.cirrus.com

CS5466

Low-cost Power/Energy IC with Pulse Output

Features

 Single-chip Power Measurement Solution

 Energy Data Linearity:

±0.1% of Reading, over 1000:1 Dynamic Range

 On-chip functions: Measures Power and

Performs Energy-to-pulse Conversions

 Meets Accuracy Spec for IEC, ANSI, & JIS.

 High-pass Filter Option

 Four Input Ranges for Current Channel

 On-chip, 2.5 V Reference

 Pulse Outputs for Stepper Motor or

Mechanical Counter

 On-chip Energy Direction Indicator

 Ground-referenced Input Signals with Single

Supply

 High-frequency Output for Calibration

 On-chip, Power-on Reset (POR)

 Power Supply Configurations:

VA+ = +5 V; AGND = 0 V; VD+ = +3.3 V to 5 V

Description

The CS5466 is a low-cost power meter solution incorpo-

rating dual delta-sigma (analog-to-digital converters

ADCs), an energy-to-frequency converter, and energy

pulse outputs on a single chip. The CS5466 is designed

to accurately measure and calculate energy for single

phase, 2- or 3-wire power metering applications with

minimal external components.

The low-frequency pulse outputs, E1

and E2, provide

pulses at a frequency which is proprtional to the active

power and can be used to drive a stepper motor or a me-

chanical counter. Energy direction output, NEG,

indicates when pulse outputs E1

and E2 represent neg-

ative active power. The high-frequency pulse output

FOUT is designed to assist in system calibration.

The CS5466 has configuration pins which allow for direct

configuration of pulse output frequency, current channel

input range, and high-pass filter enable option.

The CS5466 also has a power-on reset function which

holds the part in reset until the supply reaches an oper-

able level.

ORDERING INFORMATION

See page 16.

IIN+

IIN-

IGAIN0

IGAIN1

VIN+

VIN-

VREFOUT

VA+ RESET VD+

DGNDAGND

FOUT

CPUCLK

XOUT

XIN

FREQ0

FREQ1

FREQ2

PGA

x10

NEG

4th Order 

Modulator

2nd Order 

Modulator

HPF

Option

Config

Clock

Generator

Digital

Filter

Digital

Filter

2.5V On-Chip

Reference

VREFIN x1

HPF

Option

HPF

Energy-to-

Frequency

Conversion

APR ‘11

DS659F2

CS5466

2 DS659F2

TABLE OF CONTENTS

1. OVERVIEW ............................................................................................................................... 3

2. PIN DESCRIPTION ................................................................................................................... 4

3. CHARACTERISTICS & SPECIFICATIONS ............................................................................. 5

RECOMMENDED OPERATING CONDITIONS ....................................................................... 5

ANALOG CHARACTERISTICS................................................................................................ 5

VOLTAGE REFERENCE ......................................................................................................... 6

DIGITAL CHARACTERISTICS................................................................................................. 7

SWITCHING CHARACTERISTICS .......................................................................................... 8

ABSOLUTE MAXIMUM RATINGS ...........................................................................................9

4. THEORY OF OPERATION ..................................................................................................... 10

4.1 Digital Filters .................................................................................................................... 10

4.2 Active Power Computation ............................................................................................... 10

5. FUNCTIONAL DESCRIPTION ............................................................................................... 11

5.1 Analog Inputs ................................................................................................................... 11

5.1.1 Voltage Channel .................................................................................................. 11

5.1.2 Current Channel .................................................................................................. 11

5.2 High-pass Filter ................................................................................................................11

5.3 Energy Pulse Outputs ...................................................................................................... 11

5.3.1 Pulse Output Format. .......................................................................................... 11

5.3.2 Selecting Frequency of E1 and E2 ......................................................................11

5.3.3 Selecting Frequency of FOUT ............................................................................. 12

5.3.4 Absolute Max Frequency on E1 and E2 .............................................................. 12

5.3.5 E1 and E2 Frequency Calculation ....................................................................... 13

5.4 Energy Direction Indicator ...............................................................................................13

5.5 Power-on Reset ............................................................................................................... 13

5.6 Oscillator Characteristics .................................................................................................13

5.7 Basic Application Circuit ..................................................................................................14

6. PACKAGE DIMENSIONS ....................................................................................................... 15

7. REVISION HISTORY .............................................................................................................. 16

LIST OF FIGURES

Figure 1. Timing Diagram for E1, E2 and FOUT (Not to Scale)...................................................... 8

Figure 2. Data Flow....................................................................................................................... 10

Figure 3. Oscillator Connection..................................................................................................... 13

Figure 4. Typical Connection Diagram.......................................................................................... 14

LIST OF TABLES

Table 1. Current Channel PGA Setting ......................................................................................... 11

Table 2. Maximum Frequency for E1, E2, and FOUT................................................................... 12

Table 3. Absolute Max Frequency on E1 and E2.......................................................................... 12

CS5466

DS659F2 3

1. OVERVIEW

The CS5466 is a CMOS monolithic power measurement device with an energy computation engine. The CS5466

combines a programmable gain amplifier, two  ADCs, and energy-to-frequency conversion circuitry on a single

chip.

The CS5466 is designed for energy measurement applications and is optimized to interface to a shunt or current

transformer for current measurement, and to a resistive divider or transformer for voltage measurement. The current

channel has a programmable gain amplifier (PGA) which provides four full-scale input options. With a single +5 V

supply on VA+/AGND, both of the CS5466’s input channels accommodate common-mode plus signal levels be-

tween (AGND - 0.25 V) and VA+.

The CS5466 has three pulse output pins: E1

, E2, and FOUT. E1 and E2 can be used to directly drive a mechanical

counter or stepper motor, or interface to a microcontroller. The FOUT pin conveys active (real) power at a pulse fre-

quency many times higher than that of the E1

or E2 pulse frequency, allowing for high-speed calibration.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

CS5466-ISZR

Mfr. #:

Buy CS5466-ISZR

Manufacturer:

Cirrus Logic

Description:

Current & Power Monitors & Regulators IC for Residential PWR-Meter Apps

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

CS5466-ISZR

CS5466-ISZR

Products related to this Datasheet