參數(shù)資料
型號： CS5460A-BS
廠商： CIRRUS LOGIC INC
元件分類： ADC
英文描述： Single Phase Bi-Directional Power/Energy IC
中文描述： 2-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO24
封裝： MO-150, SSOP-24
文件頁數(shù)： 15/54頁
文件大?。?/td> 876K
代理商： CS5460A-BS
CS5460A
15
a 4.096 MHz clock at XIN, and K = 1, instanta-
neous A/D conversions for voltage, current, and
power are performed at a 4000 Sps rate, whereas
I
RMS
, V
RMS
, and energy calculations are per-
formed at a 1 Sps rate.
2.2.1 CS5460A Linearity Performance
Table 2 lists the range of input levels (as a percent-
age of full-scale) over which the (linearity + varia-
tion) of the results in the Vrms, Irms and Energy
Registers are guaranteed to be within
±
0.1 % of
reading after the completion of each successive
computation cycle. Note that until the CS5460A is
calibrated (see Calibration) the accuracy of the
CS5460A with respect to a reference line-voltage
and line-current level on the power mains is not
guaranteed to within
±
0.1%. After both channels of
the device are calibrated for offset/gain, the ±0.1%
of reading spec will also reflect accuracy of the
Vrms, Irms, and Energy Register results. Finally,
observe that the maximum (full-scale) differential
input voltage for the voltage channel (and current
channel, when its PGA is set for 10x gain) is
250 mV (nominal).
If the gain registers of both
channels are set to 1 (default) and the two DC
offset registers are set to zero (default), then a
250mV DC signal applied to the voltage/current
inputs will measure at (or near) the maximum
value of 0.9999... in the RMS Current/Voltage
Registers.
Remember that the RMS value of a
250 mV (DC) signal is also 250 mV. However, for
either input channel, it would not be practical to in-
ject a sinusoidal voltage with RMS value of
250 mV. This is because when the instantaneous
value of such a sine wave is at or near the level of
its positive/negative peak regions (over each cy-
cle), the voltage level of this signal would exceed
the maximum differential input voltage range of the
input channels. The largest sine wave voltage sig-
nal that can be presented across the inputs, with
no saturation of the inputs, is:
250 mV / sqrt(2) = ~176.78 mV (RMS),
which is ~70.7% of full-scale. This would imply that
for the current channel, the (linearity+variation) tol-
erance of the RMS measurements for a purely si-
nusoidal 60 Hz input signal could be measured to
within
±
0.1% of reading over a magnitude range of
0.2% - 70.7% of the maximum full-scale differen-
tial input voltage level.
The range over which the (linearity + variation) will
remain within ±0.1% can often be increased by se-
lecting a value for the Cycle-Count Register such
that the time duration of one computation cycle is
equal to (or very close to) a whole-numberof pow-
er-line cycles (and N must be greater than or equal
to 4000). For example, with the cycle count set to
4200, the ±0.1% of reading (linearity + variation)
range for measurement of a 60 Hz sinusoidal cur-
rent-sense voltage signal can be increased beyond
the range of 0.2% - 70.7%. The accuracy range
will be increased because (4200 samples / 60 Hz)
is a whole number of cycles (70). Note that this in-
crease in the measurement range refers to an ex-
tension of the low end of the input scale (i.e., this
does not extend the high-end of the range above
100% of full-scale). This enables accurate mea-
surement of even smaller power-line current lev-
els, thereby extending the load range over which
the power meter can make accurate energy mea-
surements. Increasing the accuracy range can be
beneficial for power metering applications which
require accurate power metering over a very large
load range.
2.2.2 Single Computation Cycle (C=0)
Note that ‘C’ refers to the value of the C bit, con-
tained in the ‘Start Conversions’ command (see
Section 4.1). This
commands
CS5460A to perform conversions in ‘single compu-
tation cycle’ data acquisition mode. Based on the
value in the Cycle Count Register, a single compu-
tation cycle is performed after a ‘Start Conversions’
command is sent to the serial interface. After the
computations are complete, DRDY is set. 32
SCLKs are then needed to read out a calculation
instructs the
Energy
Vrms
Irms
Range (% of FS)
Max. Differential
Input
0.1% - 100%
50% - 100%
0.2% - 100%
not applicable
V-channel:
±250 mV
I-channel:
±250
mV 10x
±50
mV 50x
0.1% of
reading
Linearity
0.1% of
reading
0.1% of
reading
Table 2. Available range of ±0.1% output linearity, with
default settings in the gain/offset registers.
相關(guān)PDF資料
PDF描述
CS5460A Single Phase Bi-Directional Power/Energy IC
CS5460 Single Phase Bi-Directional Power/Energy IC(單相雙向功率/能量IC)
CS5461A-IS Single Phase, Bi-directional Power/Energy IC
CS5461A-ISZ Single Phase, Bi-directional Power/Energy IC
CS5461A Single Phase, Bi-directional Power/Energy IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CS5460A-BSZ 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Single-Phase Bi-Dir Power/Energy IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
CS5460A-BSZ 制造商:Cirrus Logic 功能描述:Driver IC 制造商:Cirrus Logic 功能描述:IC ENERGY METERING 1PHASE 24SSOP 制造商:Cirrus Logic 功能描述:IC, ENERGY METERING, 1PHASE, 24SSOP
CS5460A-BSZR 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 IC Sngl-Phs BiDirect PWR/Energy RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
CS5460-BS 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Cirrus Logic 功能描述:
CS5460C-ISZ 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Sngl-Phs Bi-Drctnl Power/Energy RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
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