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An extremely accurate single-phase bi-directional average
energy measurement integrated circuit, the AS8168 far
surpasses the accuracy requirements for IEC1036 alternating
current static watt-hour meters, capable of less than
0.1% error over a dynamic range of 1000 to 1. It converts
the measured energy into pulses with the number of pulses
being proportional to the measured energy, making it
ideal for use in kWh meters that display energy the
value via mechanical counters. The IC can drive a two-phase
stepper motor directly or, for more complex metering
applications, it can be interfaced easily to any standard
micro-controller.
The on-chip programming capability of the AS8168 offers
meter manufacturers the flexibility to select the required
input and output parameters and at the same time, perform
an automated digital meter system calibration.
"The automated digital meter system calibration,
made possible by the use of the AS8168, enables meter
manufacturers to calibrate many meters simultaneously
while ensuring that all possible meter system non-idealities
are compensated for," said Dave Simpson, marketing
manager for metering products at austriamicrosystems.
"The procedure ensures that the desired performance
can be verified individually for each meter and then
programmed for final use. By using the AS8168 average
energy calculation, operators can perform the calibration
process for each meter within a second."
"This automated procedure eliminates the need
for an external resistor ladder or trim-potentiometer,
required for conventional manual calibration methods.
It offers our customers considerable savings in capital
plant expenditures."
The programming feature of the AS8168 enables meter
manufacturers to manufacture a range of meter models
on a single production line with no disruptions.
The AS8168 is available in either surface mount SOIC-18
or dual-in-line DIP-18 packaging.
About austriamicrosystems
austriamicrosystems
AG is a leading designer and manufacturer of highly
integrated analog intensive mixed signal ICs. austriamicrosystems
combines more than 20 years of design capabilities,
product and marketing know-how with its own cutting
edge analog manufacturing and test facilities. Operating
worldwide with more than 800 employees, austriamicrosystems
serves four strategic markets: Communications, Industry
& Medical, Automotive and
Full-Service Foundry.
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