sames
SA9105F
THREE PHASE BIDIRECTIONAL POWER/ENERGY
METERING IC WITH INSTANTANEOUS PULSE OUTPUT
FEATURES
n
Performs bidirectional one, two or three
phase power and energy measurement
n
Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters
n
n
Operates over a wide temperature
range
n
Excellent long term stability
n
Easily adaptable to different signal
levels
n
Precision voltage reference on-chip
n
Two pulse output formats available
n
Protected against ESD
Uses current transformers for current
sensing
DESCRIPTION
The SAMES SA9105F Three Phase
bidirectional Power/Energy metering
integrated circuit generates pulse rate
outputs for positive and negative energy
directions, the frequency of which is
proportional to the power consumption.
The SA9105F performs the calculation for
active power.
The method of calculation takes the power
factor into account.
Energy consumption is determined by the
power measurement being integrated over
time.
This innovative universal three phase power/
energy metering integrated circuit is ideally
suited for applications such as residential
and industrial energy metering and control.
The SA9105F integrated circuit is available
in 40 pin dual-in-line plastic (DIP-40), as
well as in 44 pin plastic leaded chip carrier
(PLCC-44) package types.
PIN CONNECTIONS
CIN1
CIP2
CIN2
CIP3
CIN3
1
40 CIP1
2
39 COP1
3
38 CON1
4
37 CON2
5
36 COP2
IIN1
IIP1
6
35 GND
7
34 IVP1
IIN2
8
33 IVP2
IIP2
IIN3
IIP3
9
32 IVP3
10
31 COP3
11
30 CON3
COPP
CONP
CIPP
CINP
12
29 VREF
13
28 V DD
14
27 TP27
15
26 TP26
V SS
TP17
TP18
OSC1
16
25 DIR
17
24 TP24
18
23 FOUT2
19
22 TP22
21 FOUT1
OSC2 20
DR-00946
Package: DIP-40
1/12
4366
PDS039-SA9105F-001
Rev. B
09-01-97
SA9105F
DIR
TP24
FOUT2
TP22
FOUT1
N.C.
OSC2
OSC1
TP18
TP17
V SS
PIN CONNECTIONS
39
35
34
33
32
31 30
29
40
28
41
27
42
26
43
25
44
24
1
23
2
22
3
21
4
20
5
19
6
18
DR-00947
8
9
COP2
CON2
CON1
7
10
11 12 13
14
15 16
CINP
CIPP
CONP
COPP
N.C.
IIP3
IIN3
IIP2
IIN2
IIP1
IIN1
17
COP1
CIP1
N.C.
CIN1
CIP2
CIN2
CIP3
CIN3
TP26
TP27
V DD
VREF
N.C.
CON3
COP3
IVP3
IVP2
IVP1
GND
38 37 36
Package: PLCC-44
BLOCK DIAGRAM
16 CONNECTIONS
FOR LOOPCAPS
VD D VSS
IVP1
IVP2
ANALOG
IVP3
POWER
INTEG.
SIGNAL
FOUT1
TO
FOUT2
&
IIP1
IIN1
PRO-
IIP2
IIN2
CESSING
PULSE
AVERAGE
DIR
RATE
IIP3
IIN3
GND
OSC1
VREF
REF
DR-00948
2/12
sames
TIMING & CONTROL
OSC
OSC2
SA9105F
ABSOLUTE MAXIMUM RATINGS *
Parameter
Symbol
Supply Voltage
VDD-VSS
Current on any Pin
IPIN
Storage Temperature
TSTG
Operating Temperature
TO
Current at any pin
IP
Min
-0.3
Max
6.0
Unit
V
-150
-40
-40
-100
+150
+125
+85
+100
mA
°C
°C
mA
* 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 conditions above those indicated in the operation sections of this
specification, is not implied. Exposure to Absolute Maximum Ratings for extended
periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Over the temperature range -10°C to +70°C#, unless otherwise specified.)
Parameter
Operating Temp. Range #
Symbol
TO
Min Typ Max Unit Condition
-25
+85
°C
Supply Voltage
Supply Current
Nonlinearity of
Power Calculation
VDD-VSS
IDD
4.5
5.5
10
V
mA
-0.3
+0.3
%
1% - 100% of
rated power
-25
+25
µA
Peak value
-25
+25
µA
Peak value
VSS+1
V
V
IOL = 5mA
IOH = -2mA
64
180
Hz
Hz
Specified linearity
Min and max limits
Current Sensor Inputs (Differential)
Input Current Range
III
Voltage Sensor Inputs (Asymmetric)
Input Current Range
IIV
Pins FOUT1,FOUT2,DIR
Output Low Voltage
VOL
Output High Voltage
VOH
Pulse Rate: FOUT1, FOUT2 fp
Oscillator
Pin VREF
Ref. Current
Ref. Voltage
#
VDD-1
0
0
Recommended crystal:
TV colour burst crystal, f = 3.5795 MHz
With R = 24 kΩ
-IR
45
50
55
µA connected to VSS
VR
1.1
1.3
V
Referred to VSS
Extended Operating Temperature Range available on request.
sames
3/12
SA9105F
PIN DESCRIPTION
Pin
PLCC
6
42
29
Pin
DIP
35
28
16
Designation
5
4
3
18
19
20
21
22
23
32
33
35
37
39
9
10
8
7
1
2
26
25
13
11
15
14
17
16
28
27
43
41
30
31
36
38
40
34
33
32
6
7
8
9
10
11
19
20
21
23
25
38
39
37
36
30
31
13
12
1
40
3
2
5
4
15
14
29
27
17
18
22
24
26
IVP1
IVP2
IVP3
IIN1
IIP1
IIN2
IIP2
IIN3
IIP3
OSC1
OSC2
FOUT1
FOUT2
DIR
CON1
COP1
CON2
COP2
CON3
COP3
CONP
COPP
CIN1
CIP1
CIN2
CIP2
CIN3
CIP3
CINP
CIPP
VREF
TP27
TP17
TP18
TP22
TP24
TP26
4/12
GND
VDD
VSS
sames
Description
Ground
Positive Supply Voltage
Negative Suply Voltage
Analog input for Voltage :
Analog input for Voltage :
Analog input for Voltage :
Inputs for current sensor :
Phase 1
Phase 2
Phase 3
Phase 1
Inputs for current sensor : Phase 2
Inputs for current sensor : Phase 3
Connections for crystal or ceramic resonator
(OSC1 = Input ; OSC2 = Output)
Pulse rate outputs
Direction indication output
Connections for outer loop capacitors of A/D
converters
Connections for inner loop capacitors of A/D
converters
Connection for current setting resistor
Test pin. Connect to VSS
Manufacturer's test pins (Leave unconnected)
SA9105F
sames
SA9105F
2.
Analog Input Configuration
The current and voltage sensor inputs are illustrated below.
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 AI and AV generate virtual
shorts on the signal inputs. Exact duplications of the input currents are generated
for the analog processing circuitry
V DD
IIP
CURRENT
SENSOR
INPUTS
V SS
A
I
V DD
IIN
V SS
V DD
IVP
VOLTAGE
SENSOR
INPUT
V SS
AV
GND
DR-00949
3.
Electrostatic Discharge (ESD) Protection
The SA9105F integrated circuit's inputs/outputs are protected against ESD.
4.
Power Consumption
The overall power consumption rating of the SA9105F integrated circuit is less than
50mW with a 5V supply.
6/12
sames
SA9105F
5.
Pulse Output Signals
The calculated power is divided down to a pulse rate of 64Hz, for rated conditions
on both FOUT1 and FOUT2.
The format of the pulse output signal, which provides power/energy and direction
information, is the only difference between the signals on FOUT1 and FOUT2.
The direction of the energy flow is defined by the mark/space ratio on FOUT1, while
the pulse width defines the direction on FOUT2.
Positive Energy Flow
Negative Energy Flow
Wave form on FOUT1
Wave form on FOUT2
t pp
m
t pn
t pp
m
m
t pp = 1.1ms
m
m
m
t pn
m
m
t pn = 3.4ms
Wave form on DIR
DR-00950
An integrated anticreep function ensures no metering at zero line currents.
The formula for calculating the Output Frequency (f) is given below:
FOSC
(II1 IV1) + (II2 IV2 ) + (II3 IV3 )
f = 11.16 * FOUTX *
*
3.58MHz
3 * IR2
Where FOUTX
= Nominal rated frequency (64Hz)
FOSC
= Oscillator frequency (2MHz ...... 4MHz)
II1, II2, II3
= Input currents for current sensor inputs (16µA at rated line current)
IV1, IV2 , IV3 = Input currents for voltage sensor inputs (14µA at rated line voltage)
IR
= Reference current (typically 50µA)
TYPICAL APPLICATION
In the Application Circuit (Figure 1), the components required for a three phase power
metering application are shown. Terminated current transformers are used for current
sensing.
The most important external components for the SA9105F integrated circuit are:
sames
7/12
SA9105F
C7, C9, C10 and C 11 are the outer loop capacitors for the integrated oversampling
A/D converters. The typical value of C7 is 2.2nF and the value of C9, C10 and C11 is
560pF.
The actual values determine the signal to noise and stability performance. The tolerances
should be within ± 10%.
C4, C5, C6 and C8 are the inner loop capacitors for the integrated oversampling A/D
converters. The typical value of C4, C5, C 6 and C 8 is 3.3nF. Values smaller than 0.5nF
and larger than 5nF should be avoided.
Terminated current sensors (current transformers) are connected to the current sensor
inputs of the SA9105F through current setting resistors (R8 ..R13).
The resistor values should be selected for an input current of 16µARMS into the SA9105F,
at the rated line current.
The values of these resistors should be calculated as follows:
Phase 1:
R8 = R 9 = (IL1/16µARMS) * R18/2
Phase 2:
R10 = R11 = (IL2/16µA RMS) * R19/2
Phase 3:
R12 = R13 = (IL3/16µA RMS) * R20/2
Where I LX
= Secondary CT current at rated conditions.
R18, R19 and R20
= Current transformer termination resistors for the three phases.
R1 + R1A, R4 and R15 set the current for the phase 1 voltage sense input. R2 + R2A , R5 +
P 5 and R16 set the current for phase 2 and R3 + R 3A, R6 + P6 and R17 set the current for phase
3. The values should be selected so that the input currents into the voltage sense inputs
(virtual ground) are set to 14µARMS for nominal line voltage. Capacitors C1, C2 and C3
are for decoupling and phase compensation.
R14 + P14 defines all on-chip bias and reference currents. With R 14+ P14 = 24kΩ, optimum
conditions are set. R14 may be varied within ± 10% for calibration purposes. Any changes
to R14 will affect the output quadratically (i.e: ∆R = +5%, ∆f = +10%).
XTAL is a colour burst TV crystal (f = 3.5795 MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897 MHz on-chip, to supply the digital circuitry and the
A/D converters.
8/12
sames
SA9105F
Figure 1: Application Circuit for Three Phase Power/Energy Measurement.
M AINS VOL TAGES
R1
R1A
R2
R2A
R3
R3A
L IN E 1
L IN E 2
L IN E 3
C4
N
0V
C5
1
40
2
39
3
38
4
37
5V
C9
R7
F ROM CTs
C6
5
R18
R8
V I1 P
V I1 N
7
R10
R11
R20
R12
V I3 P
9
R15 +C1
34
R16 +C2
33
D IP - 4 0
10
11
C7
35
SA 91 05 F
8
R13
V I3 N
36
6
R9
R19
V I2 P
V I2 N
C10
R17 +C3
32
R6
31
IC - 1
R21
C14
12
29
13
28
14
27
15
26
16
25
17
24
18
23
19
22
F OU T 2
20
21
F OU T 1
P6
P5
C13
0V
D IR
XTAL
D R- 0 0 9 5 1
R4
30
C8
0V
R5
C11
0V
0V
0V
C12
R1 4
P14
0V
sames
9/12
SA9105F
Parts List for Application Circuit: Figure 1
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
10/12
Symbol
IC-1
XTAL
R1
R1A
R2
R2A
R3
R3A
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
P5
P6
P14
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
Description
SA9105FPA
Crystal, 3.5795 MHz
Resistor, 200k, 1%, ¼W
Resistor, 180k, 1%, ¼W
Resistor, 200k, 1%, ¼W
Resistor, 180k, 1%, ¼W
Resistor, 200k, 1% , ¼W
Resistor, 180k, 1%, ¼W
Resistor, 24k, 1%, ¼W
Resistor, 22k, 1%, ¼W
Resistor, 22k, 1%, ¼W
Resistor, 820 Ω, 1%, ¼W
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor, 22k, 1%, ¼W
Resistor, 1M, 1%, ¼W
Resistor, 1M, 1%, ¼W
Resistor, 1M, 1%, ¼W
Resistor
Resistor
Resistor
Resistor, 820Ω, 1%, ¼W
Potentiometer, 4.7k
Potentiometer, 4.7k
Potentiometer, 4.7k
Capacitor, electrolytic, 1µF, 16V
Capacitor, electrolytic, 1µF, 16V
Capacitor, electrolytic, 1µF, 16V
Capacitor, 3.3nF
Capacitor, 3.3nF
Capacitor, 3.3nF
Capacitor, 2.2nF
Capacitor, 3.3nF
Capacitor, 560pF
Capacitor, 560pF
Capacitor, 560pF
sames
Detail
DIP-40
Colour burst TV
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Note 1
Multi turn
Multi turn
Multi turn
Note 2
Note 2
Note 2
SA9105F
Parts List for Application Circuit: Figure 1 (Continued)
Item
41
42
43
Symbol
C12
C13
C14
Description
Capacitor, 820nF
Capacitor, 100nF
Capacitor, 100nF
Detail
Note 3
Note 1: Resistor (R8, R9, R10, R11, R12 and R13) values are dependant upon the selected
values of the current transformer termination resistors R18, R19 and R20.
Note 2: Capacitor values may be selected for DC blocking and to compensate for phase
errors caused by the current transformers.
Note 3: Capacitor (C12) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as
possible.
ORDERING INFORMATION
Part Number
Package
SA9105FPA
DIP-40
SA9105FFA
PLCC-44
sames
11/12
SA9105F
Disclaimer:
The information contained in this document is confidential and proprietary to South African MicroElectronic 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:
[email protected]
For the latest updates on datasheets, please visit our web site:
http://www.sames.co.za
South African Micro-Electronic Systems (Pty) Ltd
P O Box 15888,
33 Eland Street,
Lynn East,
Koedoespoort Industrial Area,
0039
Pretoria,
Republic of South Africa,
Republic of South Africa
Tel:
Fax:
12/12
012 333-6021
012 333-8071
sames
Tel:
Fax:
Int +27 12 333-6021
Int +27 12 333-8071