Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

CS5466 Datasheet(PDF) 13 Page - Cirrus Logic

Part # CS5466
Description  Low-cost Power/Energy IC with Pulse Output
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS5466 Datasheet(HTML) 13 Page - Cirrus Logic

Back Button CS5466_05 Datasheet HTML 8Page - Cirrus Logic CS5466_05 Datasheet HTML 9Page - Cirrus Logic CS5466_05 Datasheet HTML 10Page - Cirrus Logic CS5466_05 Datasheet HTML 11Page - Cirrus Logic CS5466_05 Datasheet HTML 12Page - Cirrus Logic CS5466_05 Datasheet HTML 13Page - Cirrus Logic CS5466_05 Datasheet HTML 14Page - Cirrus Logic CS5466_05 Datasheet HTML 15Page - Cirrus Logic CS5466_05 Datasheet HTML 16Page - Cirrus Logic  
Zoom Inzoom in Zoom Outzoom out
 13 / 16 page
background image
CS5466
DS659F1
13
5.3.5
E1 and E2 Frequency Calculation
The pulse output frequency of E1 and E2 is directly pro-
portional to the active power calculated from the input
signals. To calculate the output frequency on E1 and
E2, use the following transfer function:
Example:
For a given application, assume a 50 Hz line frequency
and a purely resistive load (unity power factor), the fol-
lowing configuration is used:
– FREQ[2:0] = 3
∴ FREQmax = 2 Hz
– IGAIN[1:0] = 2
∴ IGAIN = 100
– VREFIN = VREFOUT = 2.5 V
In this configuration, the maximum sine wave that can
be applied is 250 mVp on the voltage channel and
25 mVp on the current channel. Using the above equa-
tion, the output frequency of energy pulse E1 or E2 is
calculated:
With maximum pure sinusoidal input signals, the fre-
quency of E1 or E2 is half the absolute maximum fre-
quency set with FREQ[2:0].
To calculate the frequency of FOUT for the example
above, assume FREQ2 = 0.
5.4
Energy Direction Indicator
The NEG pin indicates the sign of the calculated active
power. If negative active power is detected, the NEG
output pin will become active-high and will remain ac-
tive-high until positive active power is detected. The
NEG pin is valid at least 250ns prior to any assertion of
E1 or E2, and FOUT, to indicate the sign of a given en-
ergy output. The NEG pin is updated at a rate of 10 Hz
at MCLK = 4.096 MHz.
5.5
Power-on Reset
Upon powering up, the digital circuitry is held in reset
until the analog voltage reaches 4.0 V. At that time, an
eight-XIN-clock-period delay is enabled to allow the os-
cillator to stabilize. The CS5466 will then initialize. The
device reads the control pins IGAIN[1:0], FREQ[2:0]
and HPF, and begins performing energy measure-
ments.
5.6
Oscillator Characteristics
XIN and XOUT are the input and output of an inverting
amplifier which can be configured as an on-chip oscilla-
tor, as shown in Figure 3. The oscillator circuit is de-
signed to work with a quartz crystal. To reduce circuit
cost, two load capacitors C1 and C2 are integrated in
the device, one between XIN and DGND and the other
between XOUT and DGND. Lead lengths to/from the
crystal should be minimized to reduce stray capaci-
tance. To drive the device from an external clock
source, XOUT should be left unconnected while XIN is
driven by the external circuitry. There is an amplifier be-
tween XIN and the digital section which provides
CMOS-level signals. This amplifier works with sinusoi-
dal inputs so there are no problems with slow edge
times.
FREQE1,E2 = Actual frequency of E1 and E2 pulses [Hz]
VIN = rms voltage across VIN+ and VIN- [V]
IIN = rms voltage across IIN+ and IIN- [V]
IGAIN = Current channel gain selection (10, 50, 100, 150)
PF = Power Factor
FREQmax = Absolute Max Frequency for E1 and E2 [Hz]
VREFIN = Voltage at VREFIN pin [V]
FREQE1,E2
VIN 10
×
IIN
×
IGAIN
×
PF
×
FREQmax
×
VREFIN
2
------------------------------------------------------------------------------------------------------------------
=
0.25Vp 10
×
0.025Vp
×
100
×
1
×
2Hz
×
22
×
2.5V
2
×
---------------------------------------------------------------------------------------------------------
1Hz
=
FOUT
2048
E1 E2
+
()
×
2048 2Hz
×
4096Hz
==
=
Oscillator
Circuit
DGND
XIN
XOUT
C1
C1 =
22 pF
C2
C2 =
Figure 3. Oscillator Connection


Similar Part No. - CS5466_05

ManufacturerPart #DatasheetDescription
logo
Cirrus Logic
CS5466 CIRRUS-CS5466 Datasheet
188Kb / 16P
   Low-cost Power/Energy IC with Pulse Output
More results

Similar Description - CS5466_05

ManufacturerPart #DatasheetDescription
logo
Cirrus Logic
CS5466 CIRRUS-CS5466 Datasheet
188Kb / 16P
   Low-cost Power/Energy IC with Pulse Output
CS5462 CIRRUS-CS5462 Datasheet
198Kb / 18P
   LOW COST POWER ENERGY IC WITH PULSE OUTPUT
logo
Analog Devices
AD7755 AD-AD7755 Datasheet
250Kb / 16P
   Energy Metering IC with Pulse Output
REV. B
logo
Silan Microelectronics ...
SC3333 SILAN-SC3333 Datasheet
494Kb / 7P
   ENERGY METERING IC WITH PULSE OUTPUT
logo
Analog Devices
EVAL-ADE7755ZEB AD-EVAL-ADE7755ZEB Datasheet
457Kb / 20P
   Energy Metering IC with Pulse Output
REV. A
ADE7755ARSZ AD-ADE7755ARSZ Datasheet
457Kb / 20P
   Energy Metering IC with Pulse Output
REV. A
ADE7755ARSRL AD-ADE7755ARSRL Datasheet
457Kb / 20P
   Energy Metering IC with Pulse Output
REV. A
ADE7755ARSZRL AD-ADE7755ARSZRL Datasheet
457Kb / 20P
   Energy Metering IC with Pulse Output
REV. A
logo
Silvan Chip Electronics...
SCE7755 SILVAN-SCE7755 Datasheet
680Kb / 14P
   Energy Metering IC with Pulse Output
logo
Analog Devices
AD7755 AD-AD7755_15 Datasheet
275Kb / 16P
   Energy Metering IC with Pulse Output
REV. B
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com