CS5462-IS 查看數據表（PDF） - Cirrus Logic
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CS5462-IS Datasheet PDF : 18 Pages
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CS5462
1. GENERAL DESCRIPTION
The CS5462 is a CMOS monolithic power mea-
surement device with an energy computation en-
gine. The CS5462 combines a programmable gain
amplifier, two ∆Σ ADC’s, system calibration, and
energy-to-frequency conversion circuitry on a sin-
gle chip.
The CS5462 is designed for energy measurement
applications and is optimized to interface to a shunt
or current transformer for current measurement,
and to a resistive divider or transformer for voltage
measurement. The current channel has a pro-
2. PIN DESCRIPTION
Crystal Out
XOUT 1
CPU Clock Output CPUCLK 2
Positive Power Supply / Prog Sel 7 VD+ / P7 3
Digital Ground / Prog Sel 1 DGND / P1 4
Calibration Pin 0
CAL0 5
Neg Energy Indicator / Prog Sel 2 NEG / P2 6
Frequency Select
FREQ 7
Digital Ground
DGND 8
Differential Voltage Input
VIN+ 9
Differential Voltage Input
VIN- 10
Voltage Reference Output VREFOUT 11
Voltage Reference Input VREFIN 12
grammable gain amplifier (PGA) which provides
two full-scale input level options. With a single +5 V
supply on VA+/AGND, both of the CS5462’s input
channels accommodate common mode + signal
levels between (AGND - 0.25 V) and VA+.
The CS5462 has three pulse output pins: E1, E2
and FOUT. E1 and E2 can be used to directly drive
a mechanical counter or stepper motor, or inter-
face to a micro controller. The FOUT pin conveys
average real power at a pulse frequency many
times higher than that of the E1 or E2 pulse fre-
quency, allowing for high speed calibration.
24 XIN
Crystal In
23 CAL1
Calibration Pin 1
22 E2 / P4
Energy Output 2 / Prog Sel 4
21 E1 / P5
Energy Output 1 / Prog Sel 5
20 P3
Program Select 3
19 RESET
Reset
18 FOUT / P6 High Frequency Output / Prog Sel 6
17 IGAIN
Gain Select
16 IIN+
Differential Current Input
15 IIN-
Differential Current Input
14 VA+
Positive Analog Supply
13 AGND
Analog Ground
Clock Generator
Crystal Out
Crystal In
CPU Clock Output
Control Pins
Calibration Pins
Program
Selects1,2,3,4,5,6
Frequency Select
Current Channel Gain
Select
Reset
Energy Pulse Outputs
Energy Output 14, 23
High Freq Output5
Negative Energy
Indicator6
Analog Inputs/Outputs
1,24
2
XOUT, XIN - A single stage amplifier inside the chip is connected to these pins and can be used
with a crystal to provide the system clock for the device. Alternatively, an external clock can be
supplied to the XIN pin to provide the system clock for the device.
CPUCLK - Output of on-chip oscillator which can drive one standard CMOS load.
5, 23
CAL0, CAL1 - Must be tied to a program select pin for calibration.
4,6,20,22,21, P1, P2, P3, P4, P5, P6, P7 - Used in Calibration, Frequency Select, and Input Gain Select.
18,3
7
FREQ - Must be tied to a program select pin to determine the frequency of E1 and E2.
17
IGAIN - Must be tied to a program select pin to determine the Full-Scale Input Voltage Range of
the current channel.
19
RESET - Low activates Reset
21, 22
18
6
E1, E2 - The energy output pin issues a fixed-width pulse train output with a rate proportional to
real energy.
FOUT - Outputs energy pulses at a maximum rate of 10 kHz. Used for calibration purposes.
NEG - Low indicates negative energy.
5
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