SC7751
ELECTRONIC POWER METER IC WITH ELECTRICITY PROOF
DESCRIPTION
The SC7751 is a high accuracy fault-tolerant electrical
energy measurement IC that can provides superior stability
and accuracy over extremes in environmental conditions and
over time. The SC7751 does not exhibit any creep when there
is no load.
The SC7751 supplies average real power information on the
low frequency outputs F1 and F2. This logic outputs may be
used to directly drive an electromecanical counter or interface
to an MCU. The CF logic output gives instantaneous real
power information. This output is intended to be used for
calibration purposes, or interfacing to an MCU. The SC7751
incorporates the fault detection scheme that warns when the
two input currents differ by more than 12.5%. Billing is
continued using the larger of the two currents.
The SC7751 includes a power supply monitoring circuit on
the AVDD supply pin. If the supply falls below 4V, the SC7751
will be reset and F1, F2 will be set to logic high, CF will be set
to logic low at the same time.
The SC7751 provides synchronous frequency output for
auto-reading meter system. The CF logic output is
synchronous with the F1 and F2 logic output to ensure the
show value of the meter is consonant with the real value.
* Fault is indicated when the currents differ by
more than 12.5%.
* Less than 0.1% error over a dynamic range
of 500 to 1.
* On-chip
creep
protection
(No
load
threshold).
*The logic output REVP can be used to
indicate a potential miswiring or negative
power.
* A PGA in the current channel make flexible
to select the shunt and burden resistance.
SSOP-24
SDIP-24
FEATURES
* Single 5V supply, low power.
* On-chip power supply monitoring.
* On-chip reference with external overdrive capability.
* Supplies average real power on the frequency outputs F1
and F2, which can drive for electromechanical counters
directly.
* The high frequency output CF is intended for calibration
and supplies instantaneous real power.
ORDERING INFORMATION
Device
SC7751S
SC7751
Package
SSOP-24-300-0.65
SDIP-24-300-2.54
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http
:
www.silan.com.cn
REV:1.2
2008.04.22
Page 1 of 10
SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
