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參數(shù)資料
| 型號： | SA9607M |
| 廠商： | SAMES |
| 元件分類： | 電能質(zhì)量分析儀 |
| 英文描述： | Single Phase Power/Energy Metering IC with Tamper Detection |
| 中文描述： | 單相功率/電能計量IC篡改檢測 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大小： | 98K |
| 代理商： | SA9607M |
FUNCTIONAL DESCRIPTION
The SA9607M is a CMOS mixed signal analog/digital integrated
circuit, which performs power/energy calculations across a
power range of 1000:1, to an overall accurancy of better than
Class 1.
The integrated circuit includes all the required functions for 1-
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
SA9607M incorporates an anti-tamper scheme by continuously
measuring the power consumption on both LIVE and NEUTRAL
lines. A fault is indicated when these measurements differ by
more than 12.5%. The SA9607M generates pulses with a
frequency proportional to the larger of the two current
measurements. The source (LIVE or NEUTRAL) for these
pulses is indicated on the SEL1 pin.
Frequency outputs (MOP, MON and LED) are available. The
pulse rate on these pins follows the instantaneous active
power consumption measured.
A low voltage stepper may be driven directly from the device
by connecting it between the MOP and MON pins, alternatively
an impulse impulse counter may be driven directly by connecting
it between MOP and V
SS
.
POWER CALCULATION
In the Application Circuit (Figure 7), the voltage drop across
the shunt will be between 0 and 16mV
(0 to 80A through a
shunt resistor of 200μ
). The voltage accross the current
transformers terminating resistor will also be between 0 and
16mV
These voltages are converted to currents of between
0 and 16μA
for each current sense inputs by means of
resistors R
1
and R
2
(channel 1) as well as R
3
and R
4.
(channel
2).
The current sense input saturates at an input current of ±25μA
peak.
For the voltage sensor input, the mains voltage (230VAC) is
divided down through a divider to 14V
. The current into the
A/D converter input is set at 14μA
RMS
at nominal mains voltage,
via resistor R
6
(1M
)
.
Different pulse rates are available at the MOP and MON pins.
The device may be programmed for a 1 pulse/kWh, 10 pulse
s/
kWh or 100 pulses
/kWh output, depending on the status of
the motor pulse rate select pins MP0 and MP1.
The LED pulse rate is fixed at 6400 pulses per kWh. Rated
conditions such as 230V/20A, 230V/40A and 230V/60A may
be chosen with the rated pin. This facility allows meter
manufacturers to cater for a wide range of metering applications
with minimal design changes.
ANALOG INPUT CONFIGURATION
The input circuitry of the current and voltage sensor inputs are
illustrated below.
These inputs are protected against electrostatic discharge
through clamping diodes.
The feedback loops from the outputs of the amplifiers A
and
A
generate virtual shorts on the signal inputs. Exact
duplications of the input currents are generated for the analog
signal processing circuitry.
ELECTROSTATIC DISCHARGE (ESD)
PROTECTION
The SA9607M integrated circuit's input's/outputs are protected
against ESD.
POWER CONSUMPTION
The power consumption rating of the SA9607M integrated
circuit is less than 30mW.
VOLTAGE
SENSOR
INPUT
IVP
DR-01288
SS
V
CURRENT
SENSOR
INPUTS
IIP
IIN
SS
V
VDD
SS
V
VDD
DD
V
GND
A
V
A
I
Figure 3: Analog Input Internal Configuration
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