SA2005MSA_技术文档

Pin Selectable Three Phase Power / Energy Metering

IC for Stepper Motor / Impulse Counter Applications

with Anti Tamper Features

SA2005M

ssames

FEATURES

+

Direct drive for electro-mechanical counters or stepper

motors

Selectable dividing ratios for different meter rated

conditions

+

Meets the IEC 521/1036 Specification requirements for

Class 1 AC Watt hour meters

+

Operates over a wide temperature range

Easily adaptable to different signal levels

Precision voltage reference on chip

Protected against ESD

+

Per phaseenergydirectionandvoltagefailindication

Precisionoscillatoronchip

DESCRIPTION

The SAMES SA2005M provides a single chip active energy

The SA2005M drives a calibration LED directly. Per phase

voltage fail and voltage sequence faults as well as energy

direction indication are available as LED outputs. Selectable

divider ratios enable various mechanical counter or stepper

motor counter resolutions.

metering solution for three phase mechanical counter-based

meter designs. Very few external components are required

and it has direct drive capability for electro-mechanical

counters.

The SAMES SA2005M is a CMOS mixed signal integrated

circuit that performs three phase power/energy calculations

over a range of 1000:1, to an overall accuracy of better than

Class 1.

A precision oscillator, that replaces an external crystal, is

integrated on chip. A voltage reference is integrated on chip.

The SA2005M integrated circuit is available in 24-pin dual in

line plastic (DIP-24) and small outline (SOIC-24) package

options.

The integrated circuit includes all the required functions for 3-

phase power and energy measurement such as oversampling

A/D converters for the voltage and current sense inputs, power

calculation and energy integration. Internal offsets are

eliminated through the use of cancellation procedures.

VDD VSS

IIN1

IIP1

I1

LED

X

IVN1

V1

MON

POWER

TO

MOP

PH1

PROGRAM-

MABLE

IIN2

IIP2

I2

PULSE

IVN2

V2

PH2

ADDER

RATE

IIN3

IIP3

PH3

I3

PH / DIR

IVN3

V3

GND

SELECTOR

REF

TIMING & CONTROL OSC

INTERFACE

dr-01616

VREF

TEST

RA RE IM

Figure 1: Block diagram

1/12

SPEC-0115 (REV. 3)

09-05-02

SA2005M

ELECTRICAL CHARACTERISTICS

ssaammeess

#

(V = 2.5V, V = -2.5V, over the temperature range -10°C to +70°C , unless otherwise specified.)

SS

DD

Symbol

Typ

Parameter

Min

Max

Unit

Condition

Operating temp. Range

T

-25

+85

°C

V

O

V

DD

Supply Voltage: Positive

2.25

-2.75

2.75

-2.25

Supply Voltage: Negative

Supply Current: Positive

Supply Current: Negative

Current Sensor Inputs (Differential)

V

SS

V

I

DD

15

mA

I

SS

Input Current Range

I

II

µA

-25

+25

Peak value

Voltage Sensor Inputs (Asymmetrical)

I

IV

µA

Input Current Range

-25

+25

Peak value

Pin VREF

With R = 24kW

µA

V

Ref. Current

Ref. Voltage

-I

45

50

55

R

connected to V

SS

1.1

V

1.3

R

Reference to V

SS

Digital I/O

Pin MOP, MON, LED, PH/DIR,

PH1, PH2, PH3

V

V -1

DD

OH

I

= -2mA

V

OH

Output High Voltage

Output Low Voltage

V +1

SS

OL

I

OL

= 5mA

Pins RA, RE, IM, TEST

Input Low Voltage

V

V -1

DD

IH

V +1

SS

IL

Input High Voltage

Pins RA, RE, IM

Pin scan current*

I

V = V

I

3.1

2

7

mA

IH

DD

-I

4.6

V = V

I

IL

SS

Pin TEST

I

IH

V = V

I

48

110

µA

DD

Pull down current

#Extended Operating Temperature Range available on request.

*Switched to pin scan mode for 71µs.

ABSOLUTE MAXIMUM RATINGS*

Parameter

Symbol

Min

Max

6.0

Unit

V

mA

°C

Supply Voltage

V -V

DD

3.6V

-150

-40

SS

Current on any pin

Storage Temperature

Operating Temperature

I

+150

+125

+85

T

STG

-40

°C

O

*Stresses above those listed under “Absolute Maximum Ratings” may cause permanent

damage to the device. This is a stress rating only. Functional operation of the device at these

or any other condition above those indicated in the operational sections of this specification, is

not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device

reliability.

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SA2005M

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PIN DESCRIPTION

Designation

Description

Analog Ground. The voltage to this pin should be mid-way between V and V .

SS

20

6

GND

DD

V

DD

Positive supply voltage. Typically +5V if a current transformer is used for current sensing.

V

SS

Negative supply voltage. Typically 0V if a current transformer is used for current sensing.

18

Voltage sense inputs. The current into the A/D converter should be set at 14µA at nominal mains

RMS

21, 24, IVN1, IVN2,

voltage. The voltage sense input saturates at an input current of ±25µA peak.

3

IVN3

Inputs for current sensors. The termination resistor voltage from each current transformer is

23, 22,

2, 1,

IIN1, IIP1,

IIN2, IIP2,

IIN3, IIP3

converted to a current of 16µA at rated conditions. The current sense input saturates at an input

RMS

current of ±25µA peak.

5, 4

19

This pin provides the connection for the reference current setting resistor. A 24kW resistor

VREF

connected to V sets the optimum operating condition.

SS

Test input. For normal operation connect this pin to V .

SS

17

TEST

Calibration LED output. Refer to section LED Output (LED) for the pulse rate output options.

LED

10

Motor pulse outputs. These outputs can be used to drive an impulse counter or stepper motor directly.

11, 12 MON, MOP

PH / DIR

13

Multiplexed Phase or direction driver output.

14, 15, PH1, PH2,

Multiplexed LED drivers for direction and mains fail indication.

16

7

8

PH3

RA

Rated conditions select input.

The RE input selects the calibration LED resolution as well as the summing mode for the

programmable adder.

RE

The IM inputs selects the counter resolution (Motor drive output).

9

IM

ORDERING INFORMATION

IIP2

1

24 IVN2

Part Number

SA2005MPA

SA2005MSA

Package

DIP-24

IIN2

IIN1

2

23

IVN3

IIP3

3

22 IIP1

SOIC-24

IVN1

21

4

IIN3

VDD

RA

GND

5

20

19

18

17

16

15

14

13

VREF

6

VSS

7

RE

TEST

8

PH3

IM

9

PH2

LED

10

11

12

MON

MOP

PH1

PH / DIR

dr-01617

Figure 2: Pin connections: Package: DIP-24, SOIC-24

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SA2005M

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FUNCTIONAL DESCRIPTION

POWER CONSUMPTION

The SAMES SA2005M is a CMOS mixed signal analog/digital

integrated circuit that performs three phase power/energy

calculations across a power range of 1000:1 to an overall

accuracy of better than Class 1.

The overall power consumption rating of the SA2005M

integrated circuit is less than 80mW with a 5V supply.

INPUT SIGNALS

ANALOG INPUT CONFIGURATION

The integrated circuit includes all the required functions for 3-

phase power and energy measurement such as oversampling

A/D converters for the voltage and current sense inputs, power

calculation and energy integration. Internal offsets are

eliminated through the use of cancellation procedures.

The current and voltage sensor inputs are illustrated in figure 3.

These inputs are protected against electrostatic discharge

through clamping diodes, in conjunction with the amplifiers

input configuration. The feedback loops from the outputs of the

amplifiers A and A generate virtual shorts on the signal inputs.

I

V

Exact duplications of the input currents are generated for the

analog processing circuitry. The current and voltage sense

inputs are identical. Both inputs are differential current driven

up to ±25µA peak. One of the voltage sense amplifiers input

terminals is internally connected to GND. This configuration is

possible because the voltage sense input is much less

sensitive to externally induced parasitic signals compared to

the current sense inputs.

The integrated circuit includes all the required functions for a

three phase mechanical counter-based meter design. A

precision oscillator, that replaces an external crystal, is

integrated on chip providing a temperature stable time base for

the digital circuitry. A temperature stable voltage reference

integrated on chip generates the reference current used by the

analog circuitry.

Voltage and current are sampled simultaneously by means of a

sigma delta modulator type ADC and power is calculated for

each individual phase.

Voltage Sense Inputs (IVN1, IVN2, IVN3)

The mains voltages are measured by means of resistor

dividers and the divided voltages are converted to currents.

The current into each voltage sense input (virtual ground)

should be set to 14µARMS at rated voltage conditions. The

The power is fed to a programmable adder that allows the

representation of the measured energy to be either total or

absolute sum.

individual mains voltages are divided down to 14V

per

RMS

phase. The resistors R12, R13 and R14 (figure 8) set the

current for the voltage sense inputs. The voltage sense inputs

saturate at an input current of ±25µA peak.

The summed power is integrated and divided down to

represent integrated energy. Pulses on the LED output and on

the mechanical counter driver outputs represent measured

amounts of energy. Programmable dividers provide flexible

counter as well as calibration LED resolutions.

V

DD

Outputs for phase fail and voltage sequence faults and energy

direction are available.

IIP

V

SS

CURRENT

SENSOR

INPUTS

A_I

Calibration of the device is done on the voltage sense inputs of

the SA2005M.

V

DD

IIN

The SA2005M may be used in various meter designs by

setting the RE, RA and IM pins to the appropriate state. See

Input Signals section for the configuration settings. These

features enable the meter manufacturer extremely flexible

meter designs from a single integrated circuit.

V

SS

V

DD

IVP

VOLTAGE

SENSOR

INPUT

V

An integrated anti-creep function ensures that no pulses are

generated at zero line currents.

SS

A

V

ELECTROSTATIC DISCHARGE (ESD) PROTECTION

The SA2005M integrated circuit's inputs/outputs are protected

against ESD.

GND

DR-01288

Figure 3: Analog input internal configuration

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SA2005M

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Resolution(RE)

Current Sense Inputs (IIN1, IIP1, IIN2, IIP2, IIN3, IIP3)

The current sense inputs connects to a termination resistor

connected across the terminals of a current transformer. At

rated current the resistor values should be selected for input

The RE input selects the summing mode for the programmable

adder as well as the dividing ratio for the LED output (LED

resolution). Thefollowingtableliststheoptionsavailable:

currents of 16µA . Referring to figure 8, the resistors R1 and

RMS

RE Pin

Summing Mode

Dividing Ratio

R2 on current channel 1, resistors R3 and R4 on current

channel 2 and resistors R5 and R6 on current channel 3, define

the current level into the current sense inputs of the SA2005M.

The current sense inputs saturates at an input current of

±25µA peak. Resistors R29, R30 and R31 are used as current

transformer termination resistors. The voltage drop across the

termination resistors should be at least 20mV at rated

conditions. Values for the current sense inputs are calculated

as follows:

(LED Resolution)

VSS

Total sum

1

4

1

4

PH/DIR

OPEN

VDD

Total sum

Absolute sum

The summing mode is the representation of the measured

energyandcanbeeitherofthefollowingtypes:

R1

R3

R5

= R

2

= ( I

L/ 16µARMS) x R29/ 2

4

6

L

/ 16µARMS ) x R30 / 2

/ 16µARMS ) x R31 / 2

Totalsum

This represents the total sum of the energy measured on all

three phases flowing through the current sensors. Negative

energyflowistakenintoconsideration.

Where:

I = Line current/CT-ratio

L

The value of the termination resistors should be less than the

resistance of the CT's secondary winding.

Absolutesum

This represents the sum of the energy measured on all three

phases, regardless of the direction of energy flow through the

currentsensors.

Voltage Reference Connection (VREF)

A bias resistor of 24kW provides an optimum bias conditions on

chip. Calibration of the SA2005M is done on the voltage sense

inputs as described in the Typical Application.

Impulses(IM)

The IM inputs selects between 1, 10, or 100 dividing ratio for

the motor drive outputs (counter resolution). Please note that

the device will not perform metering functions while in test

mode. Refer to the Using the RA, Re, Im inputs section for

furtherinformation.

Rated (RA)

The rated condition select pin allows the metering constants

(LED output and Motor Drive output) to remain unchanged for

different rated conditions having a 1:2:3 scaling ratio, for

example 230V/20A, 230V/40A and 230V/60A. This option

allows for the development of different rated meters requiring

minimal changes. The only changes to be implemented is the

selection of the current sense resistors for the expected rated

load currents and the selection of pins RA, RE and IM.

IM Pin

VSS

PH/DIR

VDD

Dividing Ratio (Counter Resolution)

100 (1P/KwH)

10 (10P/KwH)

1 (100P/KwH)

OPEN

Test Mode

RA Pin Rated Conditions Multiplying Ratio

1/3

2/3

3/3

VSS

Test Inputs (TEST)

PH/DIR

VDD

The TEST input is the manufacturers test pin and must be

connectedtoVSSinameteringapplication.

Fast LED output. The output is 1252Hz at rated

current and voltage inputs.

Open

At a rated condition of 230V/60A (13800W), setting the RA pin

to VDD (ratio set to 3/3) and the RE pin to VSS (LED

resolution) the LED pulse rate will be 3200 pulses/KWh. With a

combination of RA, RE and IM settings various rated condition

can easily be met. Refer to the Using the RA, RE, IM inputs

sectionforfurtherinformation.

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SA2005M

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Using the RA, RE and IM inputs

3600

Imax x Vnom x 3

1

The following formulas can be used to calculate the LED

output and motor pulse rates. Note that for the motor pulse

rates shown in the datasheet a MOP pulse followed by a

MON pulse is treated as two energy pulses.

Motor pulses/kWh = 36.8 x RA x

x

ImFactor

1000

Where:

Imax = Meters maximum rated current

Vnom = Meters nominal voltage

RA = 1/3, 2/3 or 3/3 (see Rated RA section)

ImFactor depends on IM:

3600

LED pulses/kWh = 36.8 x RA x Imax x Vnom x 3

1000

1

x

RE

IM = VDD then ImFactor = 16

Where:

IM = PH/DIR then ImFactor = 160

IM = VSS then ImFactor = 1600

Imax = Meters maximum rated current

Vnom = Meters nominal voltage

RA = 1/3, 2/3 or 3/3 (see Rated RA section)

RE = 1 or 4 (see resolution RE section)

The following table shows the combinations for some the common rated conditions. IM is selected so that the counter increments to

the highest possible rate.

Imax

Vmax

RA

RE

IM

LED Pulse rate

(Pulses/kWh)

Motor Pulse

Rate (Pulses/kWh)

10

20

30

40

60

80

230

PH/DIR

VDD

PH/DIR or VDD

VSS or Open

VDD

3200

1600

3200

1600

800

400

200

100

PH/DIR

VDD

PH/DIR

ANTI-TAMPER CONDITIONS

The SA2005M caters for the following meter tamper conditions, which are indicated as follows:

Description

Method

Result

One LED is provided for each phase to indicate abnormal

operating conditions.

During normal conditions, the LEDs

are continuously switched on.

Phase

Voltages

Phase Failure,

no voltage

The SA2005M will record the energy

In case of a phase failure, the corresponding LED is

switched off.

consumption accurately under this condition

Phase

The SA2005M will record the energy

In case of phase sequence error, the phase LED’s are flashing

with a repetition rate of approximately 1Hz. The direction LED’s

will show which phases is swapped, by switching the corres-

ponding two direction LED’s off. A connection of a line voltage

to the neutral terminal would be indicated in the same way.

Sequence

Error

consumption accurately under this condition

One LED is provided for each current sensor to indicate

reverse energy flow. If detected, the corresponding LED is

switched off. The SA2005M can be configured to accumulate

the absolute energy consumption for each phase measured,

irrespective of the direction of the energy flow.

Input / Output

Terminals

The SA2005M will record the energy

consumption accurately under this condition

Interchanged

Missing

The architecture of the meter should provide for a good

"phantom neutral" in cases where the neutral is disconnected

from the meter.

In this case, the meter would register the

energy consumption correct.

Neutral

Connection

Return

The SA2005M will therefore record the energy consumption

A indication for this condition could be

realized external to the IC.

through Earth accurately under this condition.

The SA2005M will record the energy

Load

consumption accurately under this condition

Imbalance

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SA2005M

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OUTPUT SIGNALS

Multiplex Output (PH/ DIR)

LED Output (LED)

The PH/DIR output enables either direction or voltage

information on the phase LED driver outputs (PH1, PH2 and

PH3). This multiplex output switches between logic 0 and 1 at a

frequency of approximately 113Hz. A logic 0 enables energy

direction information on the LED driver outputs and a logic 1

enables voltage information.

Various LED output pulse rates are available. Refer to the

“Using the RA, RE and IM inputs” section. With RA pin open the

LED output is 1252Hz at rated conditions. In this mode t is

LED

71uS, for the other pulse rate options t is 10ms. The LED

LED

output is active low as shown in figure 4.

The PH/DIR output is used in conjunction with the LED driver

outputs to display information about each individual phase,

see figure 6.

VDD

LED

VSS

DR-01332

Phase LED Drivers (PH1, PH2, PH3)

t

LED

The LED driver outputs present either direction information or

voltage information. The three LED driver outputs are used in

conjunction with the PH/DIR output to display information

about each individual phase (refer to figure 6) as follows:

Figure 4: LED pulse output

An integrated anti-creep function prevents any output pulses if

the measured power is less than 0.01% of the meters rated

current.

PH/DIR = 0 (Direction indication)

Motor Output (MOP, MON)

When PH/DIR is low (logic 0) energy direction information for

each individual phase is available on PH1, PH2 and PH3. A

logic 1 indicates reverse energy flow and a logic 0 indicates

positive energy flow. Reverse energy flow is defined as the

condition where the voltage sense input and the current sense

inputs are out of phase (greater than 90 degrees). Positive

energy flow is defined as the condition where the voltage

sense and current sense inputs are in phase.

The motor pulse width is fixed at 142ms. The MON pulse will

follow the MOP pulse within double the pulse width time. This

prevents the motor armature is in the wrong position after a

power failure. Both MOP and MON outputs are active high. A

low voltage stepper may be driven directly from the device by

connecting it between the MOP and MON pins, alternatively

an impulse counter may be driven directly by connecting it

between MOP and V . The motor drive waveforms are shown

SS

in figure 5.

PH/DIR = 1 (Voltage fail / phase sequence error)

When PH/DIR is high (logic 1) voltage information is available

on PH1, PH2 and PH3. A logic 1 on any of these pins indicates

a voltage failure, the SA2005M does not detect a zero crossing

on the applicable voltage sense input. Referring to figure 6 the

voltage fail LED will be on when the voltage phase is present

and off when the voltage phase is missing.

VDD

MOP

VSS

VDD

MON

VSS

DR-01618

t_m

2t_m

t_m

In the case of a phase sequence error all three LED driver

outputs PH1, PH2 and PH3 will pulse with a repetition rate of

approximately 1Hz.

Figure 5: Motor drive on MON and MOP pins of device

PH (Drive)

DIR (Sink)

PH/DIR

D1

D2

D3

D4

D5

D6

VFAIL 1

R9

VFAIL1

DIR1

VFAIL2

DIR2

VFAIL3

DIR3

Channel 1

DIR 1

PH1

VFAIL 2

R10

Channel 2

DIR 2

PH2

VFAIL 3

R11

Channel 3

DIR 3

dr-01603

PH3

Figure 6: Multiplexing of the LED Drivers

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SA2005M

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TYPICAL APPLICATION

Voltage Divider

The analog (metering) interface described in this section is

designed for measuring 230V/60A with precision better than

Class1.

The voltage divider for phase one is calculated for a voltage

drop of 14V. Equations for the voltage divider in figure 4 are:

RB = R20 + R23 + R26

RB = R12 || (R17 + P1)

The most important external components for the SA2005M

integrated circuit are the current sense resistors, the voltage

sense resistors and the bias setting resistor. The resistors

used in the metering section should be of the same type so

temperatureeffectsareminimized.

A 5k trimpot will be used in the voltage channel for meter

calibration. The center position on the pot is used in the

calibration P1 = 2.5kW.

Combining the two equations gives:

(RA + RB ) / 230V = RB / 14V

CurrentInputIIN1, IIP1, IIN2, IIP2

Two current transformers are used to measure the current in

the live and neutral phases. The output of the current

transformer is terminated with a low impedance resistor. The

voltage drop across the termination resistor is converted to a

current that is fed to the differential current inputs of the

SA2005M.

Values for resistors R17 = 22kW, P1 = 2.5kW and R12 = 1MW

is chosen.

Substituting the values result in:

RB = 23.914kW

RA = RB x ( 230V / 14V – 1 )

RA = 368.96kW.

CT Termination Resistor

The voltage drop across the CT termination resistor at rated

current should be at least 20mV. The CTs have low phase shift

and a ratio of 1:2500. The CT is terminated with a 3.6W resistor

giving a voltage drop of 86.4mV across the termination resistor

Standard resistor values for R24, R25 and R26 are chosen to

be 130kW.

atratedconditions(I forthemeter).

max

Standard resistor values for R18, R19, R20, R21, R22 and

R23 are chosen to be 120kW.

CurrentSensorInputResistors

The resistors R1 and R2 define the current level into the

current sense inputs of phase one of the SA2005M. The

resistor values are selected for an input current of 16µA on the

current inputs of the SA2005M at rated conditions. For a 60A

meter at 2500:1 CT the resistor values are calculated as

follows:

The capacitor C1 is used to compensate for phase shift

between the voltage sense inputs and the current sense inputs

of the device, in cases where CTs with phase errors are used.

The phase shift caused by the CT may be corrected by

inserting a capacitor in the voltage divider circuit. To

compensate for a phase shift of 0.18 degrees the capacitor

value is calculated as follows:

R1=R2 =(I /16µA)xR /2

SH

L

=60A/2500/16µAx3.6W /2

= 2.7kW

C = 1 / (2 xp x Mains frequency x R12 x tan (Phase shift angle))

C = 1 / ( 2 xp x 50 x 1MW x tan (0.18 degrees ))

C = 1.013µF

I =Linecurrent

L

RSH=CTTerminationresistor

2500=CTratio

Reference Voltage Bias resistor

R7 defines all on chip and reference currents. With R7 = 24kW

optimum conditions are set. Device calibration is done on the

voltage input of the device.

The three current channels are identical so R1 = R2 = R3 =

R4=R5=R6.

VoltageInputIVP

Device setup

The voltage input of the SA2005M (IVP) is driven with a current

of 14µA at nominal mains voltage. This voltage input saturates

at approximately 17µA. At a nominal voltage current of 14µA

allows for 20% overdriving. The mains voltage is divided with a

voltage divider to 14V that is fed to the voltage input pins via a

1MW resistor.

The resistor values calculated above is for a 60A rated meter

so RA must be set to VDD, according to the description under

Input Signals. The RE and IM inputs of the device must be set

to the appropriate states for the meter to function correctly.

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Neutral

GND

R18

R21

R24

V3 In

R15

R16

R17

P3

P2

P1

R19

R22

R25

V2 In

R20

R23

R26

V1In

U1

IIN1

R1

CT1

23

20

21

24

3

GND

IVN1

IVN2

IVN3

R29

GND

C1

R12

R2

22

IIP1

R13

R14

C2

C3

GND

R3

CT2

2

IIN2

R30

VDD

12

MOP

R4

CNT1

6 5 4 3 2 1 .1

Counter

VDD

1

IIP2

R27

GND

C4

11

10

6

MON

LED

VDD

R5

CT3

5

IIN3

D7

R8

R31

R28

GND

C5

C6

R6

4

IIP3

GND

VSS

R11

R10

R9

R7

16

15

14

19

V3 Out

V2 Out

V1 Out

VREF

PH3

PH2

PH1

18

17

7

VSS

TEST

RA

D5

VFAIL3

D6

DIR3

D3

VFAIL2

D4

D1

VFAIL1

D2

DIR1

VSS

DIR2

8

13

RE

PH/DIR

9

IM

S7

S1 S2 S3

S5 S6

S8 S9

S4

SA2005M

VDD

VSS

dr-01619

Figure 8: Typical application circuit

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Parts List for Application Circuit: Figure 8

Symbol

U1

Description

Detail

SA2005M

DIP-24 / SOIC-24

Resistor, 2.7k, 1/4W, 1%, metal

Resistor, 24k, 1/4W, 1%, metal

Resistor, 1k, 1/4W, 5%, carbon

Resistor, 1M, 1/4W, 1%, metal

Resistor, 22k, 1/4W, 1%, metal

Resistor, 120k, 1/4W, 1%, metal

Resistor, 130k, 1/4W, 1%, metal

Resistor, 1k, 1/4W, 1%, metal

Resistor, 3.6W, 1/4W, 1%, metal

Capacitor, 1µF, 16V, electrolytic

Capacitor, 220nF

Note 1

R1

R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

R12

R13

R14

R15

R16

R17

R18

R19

R20

R21

R22

R23

R24

R25

R26

R27

R28

R29

R30

R31

C1

Note 1

Note 2

C2

C3

C4

Capacitor, 220nF

C5

Capacitor, 820nF

Note 3

C6

3mm Light emitting diode

Direction indicator

V1 Fail indicator

Direction indicator

V2 Fail indicator

Direction indicator

V3 Fail indicator

Calibration LED

D1

3mm Light emitting diode

D2

3mm Light emitting diode

D3

3mm Light emitting diode

D4

3mm Light emitting diode

D5

3mm Light emitting diode

D6

3 mm Light emitting diode

D7

Mechanical stepper motor counter

Current Transformer, TZ76

CNT1

CT1

CT2

CT3

2500:1

Note 1: Resistor (R1 to R6) values are dependent on the selection of the termination resistors (R29 to R31) and CT combination

Note 2: Capacitor values may be selected to compensate for phase errors caused by the current transformers.

Note 3: Capacitor C6 to be positioned as close as possible to supply pins V and V of U1 as possible.

DD

SS

10/12

http://www.sames.co.za

PSMA29060057MAP

ssaammeess

NOTES:

11/12

http://www.sames.co.za

PSMA29060057MAP

ssaammeess

DISCLAIMER:

The information contained in this document is confidential and proprietary to South African Micro-Electronic Systems (Pty) Ltd

("SAMES") and may not be copied or disclosed to a third party, in whole or in part, without the express written consent of SAMES.

The information contained herein is current as of the date of publication; however, delivery of this document shall not under any

circumstances create any implication that the information contained herein is correct as of any time subsequent to such date.

SAMES does not undertake to inform any recipient of this document of any changes in the information contained herein, and

SAMES expressly reserves the right to make changes in such information, without notification, even if such changes would render

information contained herein inaccurate or incomplete. SAMES makes no representation or warranty that any circuit designed by

reference to the information contained herein, will function without errors and as intended by the designer.

Any sales or technical questions may be posted to our e-mail address below:

energy@sames.co.za

For the latest updates on datasheets, please visit our web site:

http://www.sames.co.za.

SOUTH AFRICAN MICRO-ELECTRONIC SYSTEMS (PTY) LTD

Tel: (012) 333-6021

Tel: Int +27 12 333-6021

Fax: (012) 333-8071

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12/12

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型号：	SA2005MSA
厂家：	SAMES
描述：	Pin Selectable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications with Anti Tamper Features 引脚可选三相功率/电能计量芯片的步进电机/脉冲计数器的应用与防篡改功能计数器脉冲光电二极管电机
文件：	总12页 (文件大小：361K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SA2005MSA [SAMES]

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