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PDF SA2007HPA Data sheet ( Hoja de datos )
| Número de pieza | SA2007HPA | |
| Descripción | Single Phase Bidirectional Dual Element Power/Energy Metering IC with Pulse Output | |
| Fabricantes | Sames | |
| Logotipo |  |
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Single Phase Bidirectional Dual Element
Power/Energy Metering IC with Pulse Output
SA2007H
sames
FEATURES
+ Two current sensor inputs
+ Dual pulse and energy direction outputs
+ No external crystal or resonator required
+ Performs bi-directional power and energy measurement
+ Meets the IEC 521/1036 Specification for Class 1 AC Watt
hour meters
DESCRIPTION
The SAMES SA2007H is a single phase bidirectional dual
element energy metering integrated circuit. It provides a
simple analog interface to a micro-controller and is specifically
designed for meter manufacturers to have full control over the
meter functionality.
The SA2007H has two current sensor inputs. The power
consumption on both inputs are continuously measured. A
typical application would be to monitor Live and Neutral lines
for tamper detection.
+ Protected against ESD
+ Total power consumption rating below 25mW
+ Adaptable to different types of sensors
+ Operates over a wide temperature range
+ Precision voltage reference on-chip
For each current sensor input the SA2007H integrated circuit
has a corresponding pulse output, each generating a pulse
rate with a frequency proportional to the power consumption
measured on the specific channel.
The SA2007H performs active power measurement and takes
the power factor into account. Energy consumption can be
determined by the power measurement being integrated over
time. The energy flow direction information is also available for
each channel.
IIP1
IIN1
IVP
AGND
IIP2
IIN2
CURRENT
CHANNEL 1
X POWER 1
POWER TO
PULSE RATE
VOLTAGE
OUTPUT
CONTROL
CURRENT
CHANNEL 2
X POWER 2
POWER TO
PULSE RATE
VOLTAGE
REF.
OSC
TIMING
P1
D1
OMODE
RP
INT
P2
D2
FMO
VDD
VSS
VREF
dr-01623
TCLK TEST
Figure 1: Block diagram
SPEC-0116 (REV. 1)
1/10
PRELIMINARY
15-01-01
1 page  
SA2007H
INPUT SIGNALS
Voltage reference (VREF)
A bias resistor of 24kW sets optimum bias conditions on chip.
Calibration of the SA2007H should be done in the micro-
controllers software.
Output Mode (OMODE)
The output behavior of the SA2007H is selectable between
fixed width outputs or latched outputs. In fixed width mode the
P1 and P2 output pulses stay at a fixed width. In latched mode
the status of P1 and P2 are cleared with a logic 1 on the RP pin.
Refer to the “Output signals in latched mode” section (Page 6)
for further information.
OMODE Description
0 Fixed width mode
1 Latched mode
Clear Interrupt (RP)
A logic 1 on the RP input is used to clear the interrupt
generated by the SA2007H when a pulse is generated on P1
or P2, while operating in latched mode. By clearing the
interrupt in latched mode the status of the pulse outputs will
also be cleared.
Test Inputs (TEST, TCLK)
For normal operations these pins must be connected to VSS.
sames
OUTPUT SIGNALS
Pulse outputs (P1, P2)
The output on P1 and P2 is a pulse density signal representing
the instantaneous power/energy measurement as shown in
figure 4. The pulse width tp on P1 and P2 change with the
direction of energy measurement tp is 71.5µs for positive
energy and doubles (143µS) if negative energy is measured.
The output frequency may be calculated using the following
formula:
f = 11.16 x FOUT x ( II x IV ) / IR2
Where:
FOUT=
II =
IV =
IR =
Typical rated output frequency (1360Hz)
Input current on current sense input (16µA at rated
conditions)
Input current on voltage sense input (14µA at rated
conditions)
Reference current on VREF typically 50µA
An integrated anti-creep function does not allow output pulses
on P1 or P2 if no power is measured by the device.
vMAINS
POWER
VxI
t
FOUT
DR-01282
tP
t
t
Figure 4: FOUT instantaneous pulse output
Direction indication (D1, D2)
The SA2007H provides information about the energy flow
direction of both current channels separately on pins D1 and
D2.
Logic 0 on pin D1 or D2 indicates reverse energy flow of that
particular channel. Reverse energy flow is defined as the
condition where the voltage sense input and current sense
input are out of phase (greater than 90 degrees).
http://www.sames.co.za
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PRELIMINARY
5 Page | ||
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