STPMS1BPQR Datasheet, PDF (1/23 Pages) STMicroelectronics – Dual-channel 1-bit, 2 MHz, 1st order Dual-channel 1-bit, 2 MHz, 1st order

STPMS1
Dual-channel 1-bit, 2 MHz, 1^st order
sigma-delta modulator with embedded PGA
Features
■ V_CC supply range: 3.2 V - 5.5 V
■ Two 1^st order sigma-delta modulators
■ Programmable chopper-stabilized low noise
and low offset amplifier
■ Supports 50-60 Hz AC watt meters
■ Internal low-drop regulator at 3 V (typ.)
■ Precision voltage reference: 1.23 V and 30
ppm/°C (typ.)
QFN16 (3 x 3 mm.)
Applications
■ Power metering
■ Motor control
■ Industrial process control
■ Weight scale
■ Pressure transducers
measurement applications when single or double
inputs must be monitored at the same time.
Description
The STPMS1, also called a smart-sensor device,
is an ASSP designed for effective measurement
in power line systems utilizing the Rogowski coil,
current transformer, or shunt principle. It is used
in combination with the STPMC1 programmable
poly-phase energy calculator IC, as a building
block for single-phase or poly-phase energy
meters. The STPMS1 is a mixed signal IC
consisting of an analog and a digital section. The
analog section consists of a pre-amplifier and two
1^st order ΣΔ modulator blocks, band-gap voltage
reference, a low-drop voltage regulator, and DC
buffers, while the digital section consists of a clock
generator and output multiplexer. This device is
designed for use in medium resolution
Table 1. Device summary
Order code
Package
STPMS1BPQR
QFN16 (3 x 3 mm)
Packaging
2500 parts per reel
October 2010
Doc ID 16524 Rev 2
1/23
www.st.com
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