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Part: SA2102DSA
Category:
Description: Single Phase KWH Metering ic With Pulse Output
Company: South African Micro-Electronic Systems
Datasheet: Download SA2102DSA datasheet File size : 66 kB
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Datasheet text preview:
Single Phase Kilowatt-hour Metering IC
SA2102D
FEATURES + Meets the IEC + + + + + + + + +
sames
61036 Specification requirements for Bi-directional and uni-directional energy measurement Configurable for different meter ratings Precision on-chip oscillator (70ppm/°C drift) Precision on-chip voltage reference (10ppm/°C drift) On-chip anti-creep function (0.02% of Imax) Low power consumption (<25mW typical)
Class 1 AC static watt-hour meters for active energy Less than 0.5% Error over a dynamic range of 1:1000 The motor drive outputs (MOP, MON) provide the average power information and can drive an electro-mechanical counter directly LED pulse output for calibration purposes
DESCRIPTION
The SAMES SA2102D* is an accurate single phase power/energy metering integrated circuit providing a singlechip solution for energy meters. Very few external components are required and has direct drive capability for electro mechanical counters. The SA2102D does not require an external crystal. A precision oscillator, which supplies the circuitry with a stable frequency, is integrated on chip. The SA2102D metering integrated circuit generates a pulse rate output, the frequency of which is proportional to the power consumption. The SA2102D performs the calculation for active power. The method of calculation takes the power factor into account. Programmable inputs allow the meter manufacturer to configure the SA2102D for different meter maximum currents (IMAX) and nominal voltages (VNOM) without having to change the stepper motor or impulse counter gear ratio. The LED pulse output follows the average power consumption measured and is intended for meter calibration purposes. In fast calibration mode this output provides a high frequency pulse rate following the instantaneous power consumption and can be used for fast calibration or to interface with a microcontroller. The SA2102D includes an anti-creep feature preventing any creep effects in the meter. The SA2102D can be configured for positive, negative or bi-directional energy measurement. The SA2102D integrated circuit is pin compatible to the SA2002D and is available in 20 pin dual-in-line plastic (PDIP20), as well as 20 pin small outline (SOIC20) package types.
VDD
SO
DIRI
DIRO
FAST
POWER ON RESET IIP ADC IIN Instantaneous Average power Power INTEGRATION DIGITAL OUTPUT ADC AGND R1 VOLTAGE REFERENCE AND CURRENT BIASING DIVISION FOR COUNTER DRIVER MOTOR DRIVING BUFFERS R2 DIVISION FOR CALIBRATION LED OUTPUT LED DIGITAL OUTPUT SIGNAL PROCESSING BLOCK
IVP
R0
OSCILLATOR AND TIMING
VREF
VSS
CNF
MON
MOP
Figure 1: Block diagram
* Patents EP0559499, US5396447, PT559499T, ZA9301579, ZA9400273, ZA9702075 SPEC-0510 (REV. 5)
http://www.sames.co.za
12-02-03
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SA2102D ELECTRICAL CHARACTERISTICS
sames
#
(VDD = 2.5V, VSS = -2.5V, over the temperature range -10°C to +85°C , unless otherwise specified. Refer to Figure 2 Test Circuit for Electrical Characteristics.)
Parameter General Supply Voltage: Positive Supply Voltage: Negative Supply Current: Positive Supply Current: Negative Inputs Current Sensor Inputs (Differential) Input Current Range IIP, IIN Offset Voltage Voltage Sensor Input (Asymmetrical) Input Current Range Offset Voltage Digital Inputs DIRI Input leakage Pull down Current R2, R1, R0, FAST, CNF, SO R2, R1, R), FAST, CNF, SO Input High Voltage Input Low Voltage Outputs Digital Outputs LED, DIRO Output High Voltage Output Low Voltage MON, MOP Output High Voltage Output Low Voltage
Symbol
Min
Typ
Max
Unit
Condition
VDD VSS IDD ISS
2.25 -2.75 2.5 2.5 3.6 3.6
2.75 -2.25 5 5
V V mA mA
IIP, IIN IIP, IIN
-25 -3.1
+25 +3.1
µA mV
Peak value
IVP IVP
-25 -2.5
+25 +2.5
µA mV
Peak value
DIRI IPD VIH VIL 80 VDD-1
0.95 140
µA µA V V
VSS+1
VOH VOL VOH VOL
VDD-1 VSS+1 4.4 0.1
V V V V
ISOURCE = 5mA ISINK = 5mA ISOURCE = 15mA ISINK = 15mA
# Extended Operating Temperature Range available on request.
During manufacturing, testing and shipment we take great care to protect our products against potential external environmental damage such as Electrostatic Discharge (ESD). Although our products have ESD protection circuitry, permanent damage may occur on products subjected to high-energy electrostatic discharges accumulated on the human body and test equipment and can discharge without detection. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality during product handling.
ATTENTION! Electrostatic sensitive devices. Requires special handling.
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SA2102D ELECTRICAL CHARACTERISTICS (continued)
sames
#
(VDD = 2.5V, VSS = -2.5V, over the temperature range -10°C to +85°C , unless otherwise specified. Refer to Figure 2 Test Circuit for Electrical Characteristics.)
Parameter Reference Voltage Input VREF Ref. Current Ref. Voltage Temperature coefficient On-chip oscillator Oscillator frequency Temperature coefficient
Symbol
Min
Typ
Max
Unit
Condition
-IR VR
23 1.1
25
27 1.3
µA V ppm/°C With R = 47KW connected to VSS
10
3.73723 70
MHz ppm/°C
# Extended Operating Temperature Range available on request.
ABSOLUTE MAXIMUM RATINGS*
Parameter Supply Voltage Operating temperature limits Storage Temperature Specified operating range Symbol VDD-VSS Tlimit TSTG TO Min 3.6 -40 -40 -25 Max 6 +85 +125 +85 Unit V °C °C °C
*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.
VDD
VDD SO DIRO DIRI IIN LED
IIP
IVP AGND
SA2102D
MOP MON VSS FAST R0 R1 R2
VREF
VSS
Figure 2: Test Circuit for Electrical Characteristics
http://www.sames.co.za
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