- 您现在的位置：买卖IC网 > PDF目录20639 > CS5460A-BSZ (Cirrus Logic Inc)IC ENERGY METERING 1PHASE 24SSOP PDF资料下载
参数资料
| 型号： | CS5460A-BSZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 34/54页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 24SSOP |
| 标准包装： | 59 |
| 输入阻抗： | 30 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 0.8V |
| 电压 - 低输入/输出： | 0.2V |
| 电流 - 电源： | 2.9mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 754 (CN2011-ZH PDF) |
| 配用： | CDB5460AU-ND - EVALUATION BOARD FOR CS5460A |
| 其它名称： | 598-1094-5 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页当前第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页
CS5460A
3.13 Input Filtering
Figure 6 shows how the analog inputs can be con-
nected for a single-ended input configuration. Note
here that the Vin- and Iin- input pins are held at a
constant DC common-mode level, and the varia-
tion of the differential input signal occurs only on
the Vin+ and Vin- pins. The common-mode level
on the Vin-/Iin- pins is often set at (or very near) the
CS5460A’s common-mode ground reference po-
tential. (The common-mode ground reference po-
tential is defined by the voltage at the VA- pin.)
But this is not required--the DC reference level of
the Vin-/Iin- pins can be set to any potential be-
tween [VA-] and [(VA+) - 250 mV]. In Figure 6, ob-
serve the circuitry which has been placed in front
of the current channel input pins, as one example.
The anti-aliasing filter can be constructed by calcu-
lating appropriate values for R I+ = R I- , C Idiff , and
C I+ = C I- . The sensor voltage that is created by the
voltage drop across R SHUNT is fed into the Iin+ pin,
while the voltage at the Iin- pin is held constant.
Figure 7 shows a differential bipolar input configu-
ration. Note in Figure 7 that the “+” and “-” input
pins for the voltage/current channels are equally
referenced above and below the CS5460A’s
ground reference voltage. Such a differential bipo-
lar input configuration can be used because the
CS5460A voltage/current channel inputs are able
to accept input voltage levels as low as -250 mV
(common-mode) below the VA- pin ground refer-
ence, which is defined by the voltage at the VA-
pin. (In fact, if desired, the center-tapped reference
of these differential input pairs could be connected
to a DC voltage of, for example, +2 V, because
+2 V is within the available common-mode range
of [VA-] and [VA+ - 250mV]. But this configuration
may not be practical for most metering applica-
tions.) In the differential bipolar input configuration,
the voltage signals at the Vin- and Iin- pins will fluc-
tuate in similar fashion to the Vin+/Iin+ pins, except
the voltages at the “-” pins will be 180 degrees out
of phase with respect to the voltage signals at the
“+” pins. Therefore the signal paths to the “+” and
“-” pins play an equal role in defining the differential
voltage input signal. Because of this, the protection
resistors placed on Vin-/Iin- pins will play an equal-
ly important role as the resistors on the Vin+/Iin+
pins, in defining the differential responses of the
34
voltage/current channel input anti-aliasing filters.
These resistors also serve as the current-limit pro-
tection resistors (mentioned earlier).
Before determining a typical set of values for R V+ ,
R V- , C V+ , C V- , C Vdiff , R I+ , R I- , C I+ , C I- , and C Idiff in
Figure 7, several other factors should be consid-
ered:
1. Values for the above resistors/capacitors should
be chosen with the desired differential-mode (and
common-mode) lowpass cutoff frequencies in
mind. In general, the differential cutoff frequencies
should not be less than 10 times the cut-off fre-
quencies of the internal voltage/current channel fil-
ters, which can be estimated by studying Figure 4
and Figure 5. In these figures, the internal voltage
channel cutoff frequency is ~1400 Hz while the
current channel cutoff frequency is ~1600 Hz. If
the cutoff frequency of the external anti-aliasing fil-
ter is much less than 10x these values (14000 Hz
and 16000 Hz), then some of the harmonic content
that may be present in the voltage/current signals
will be attenuated by the voltage/current channel
input anti-aliasing filters, because such R-C filters
will begin to roll off at a frequency of 1/10th of the
filter’s -3 dB cutoff frequency. If the designer is not
interested in metering energy that may be present
in the higher harmonics (with respect to the funda-
mental power line frequency) then the differen-
tial-mode cutoff frequencies on the voltage/current
input networks can be reduced. However, relaxing
the metering bandwidth is usually unacceptable,
as most modern power meters are required to reg-
ister energy out to the 11th harmonic (at a mini-
mum).
2. The first-order time-constants of the overall volt-
age and current channel sensor networks should
be set such that they are equal (within reason), or
at least close in magnitude. If the time-constants of
the voltage/current sensor networks are not
well-matched, then the phase relationship be-
tween the voltage-sense and current-sense sig-
nals will suffer an undesirable shift. In this
situation, the real (true) power/energy measure-
ments reported by the CS5460A can contain signif-
icant error, because the power factor of the sensed
voltage and current signals will be significantly dif-
ferent than the actual power factor of the power
line voltage/current waveforms.
DS487F5
相关PDF资料 |
PDF描述 |
|---|---|
| T95Z156K020ESSL | CAP TANT 15UF 20V 10% 2910 |
| DFN0.83BK | DURA-FLEX .83" BLACK 100' |
| MAX6983AUG+ | IC LED DRIVER LINEAR 24-TSSOP |
| VI-J5H-CX-F4 | CONVERTER MOD DC/DC 52V 75W |
| RSM40DTAD-S189 | CONN EDGECARD 80POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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:电流和电力监控器、调节器 IC Sngl-Phs BiDirect PWR/Energy 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 |
| 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:电流和电力监控器、调节器 Sngl-Phs Bi-Drctnl Power/Energy 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 |
| CS5460C-ISZR | 功能描述:电流和电力监控器、调节器 IC Sngl-Phs BiDirect PWR/Energy 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 |
发布紧急采购，3分钟左右您将得到回复。