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CS5462
PGA Gain Select
HPF Select
On-Chip
Configuration
Output Mode Select
Freq Select
IIN± PGA
4 th Order
??
Modulator
Digital
Filters
HPF
Calibration
Energy to
E1
x
x
Pulse Rate
Converter
E2
FOUT
VIN±
10x
2 nd Order
??
Modulator
Digital
Filters
HPF
Figure 1. Data Flow
3.1
Theory of Operation
erage power. This power is then adjusted based on
A computational flow diagram for the two data
paths is shown in Figure 1. The analog waveforms
at the voltage/current channel inputs are subject to
the gains of the input PGAs.
the internal calibration setting defined at startup.
Calibrating the CS5462 is done by externally con-
necting the configuration input pins, CAL1 and
CAL0, to the program select output pins, P1 - P7,
in a particular sequence. These connections will in-
3.1.1
Digital Filters
ternally compensate for small gain errors.
The modulators convert the analog input voltages
on the I and V channels to a digital bitstream; which
is then filtered by the digital filter section. The digi-
tal filter is composed of low pass sinc 3 and IIR fil-
3.1.3
Energy-to-Frequency Conversion
ters. The IIR filters are used to compensate for the
magnitude roll-off of the low pass filter section.
Both channels provide a high-pass filter option
which can be engaged into the signal path to re-
move the DC content from the current/voltage signal
before the energy calculations are made.
3.1.2 Gain Calibration
After being filtered, the instantaneous voltage and
current digital codes are used to calculate real av-
DS547F1
The calibrated energy value is then converted into
a pulse output stream with a average frequency
proportional to the measured energy. Pulse output
pins E1 and E2 can be set to lower frequencies to
directly drive a stepper motor or a mechanical
counter or interface a microcontroller or infrared
LED. The FOUT pulse output pin is set to max fre-
quency of 10 kHz. With full scale input s on both the
current and voltage channels FOUT will output
pulses with an average frequency of 10 kHz.
9
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CS5462-ISZR 功能描述:电流和电力监控器、调节器 IC Low-Cost PWR/Enrg w/Pulse Output RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel
CS5463 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Single Phase, Bi-directional Power/Energy IC
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CS5463-ISZ/D 制造商:Cirrus Logic 功能描述:
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