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| 型号： | AD8436JCPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC CONV TRUE RMS-DC LP 20LFCSP |
| 产品培训模块： | Introduction to Analog RMS-to-DC Technology: Converters and Applications |
| 标准包装： | 1,500 |
| 电流 - 电源： | 325µA |
| 电源电压： | ±2.4 V ~ 18 V，4.8 V ~ 36 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-WQ（4x4） |
| 包装： | 带卷 (TR) |
Low Cost, Low Power,
True RMS-to-DC Converter
Data Sheet
FEATURES
Delivers true rms or average rectified value of ac waveform
FUNCTIONAL BLOCK DIAGRAM
CAVG CCF
Fast settling at all input levels
Accuracy: ±10 μV ± 0.25% of reading (B grade)
Wide dynamic input range
100 μV rms to 3 V rms (8.5 V p-p) full-scale input range
SUM
RMS
AD8436
8k?
RMS CORE
VCC
100k?
100k?
IGND
Larger inputs with external scaling
Wide bandwidth:
1 MHz for ?3 dB (300 mV)
65 kHz for additional 1% error
10pF
VEE
16k?
OGND
OUT
Zero converter dc output offset
No residual switching products
Specified at 300 mV rms input
IBUFGN
IBUFIN–
10k?
–
10k?
IBUFOUT
Accurate conversion with crest factors up to 10
IBUFIN+
+
FET OP AMP
Low power: 300 μ A typical at ±2.4 V
High-Z FET separately powered input buffer
R IN ≥ 10 12 Ω, C IN ≤ 2 pF
Precision dc output buffer
OBUFIN+
OBUFIN–
16k?
+
–
DC BUFFER
OBUFOUT
Wide power supply voltage range
Dual: ±2.4 V to ±18 V; single: 4.8 V to 36 V
4 mm × 4 mm LFCSP and 8 mm × 6 mm QSOP packages
ESD protected
GENERAL DESCRIPTION
The AD8436 is a new generation, translinear precision, low
power, true rms-to-dc converter loaded with options. It
computes a precise dc equivalent of the rms value of ac wave-
forms, including complex patterns such as those generated by
switch mode power supplies and triacs. Its accuracy spans a
wide range of input levels (see Figure 2) and temperatures.
The ensured accuracy of ≤ ±0.5% and ≤ 10 μV output offset
result from the latest Analog Devices, Inc., technology. The
crest factor error is <0.5% for CF values between 1 and 10.
The AD8436 delivers true rms results at less cost than
misleading peak, averaging, or digital solutions. There is no
programming expense or processor overhead to consider, and
the 4 mm × 4 mm package easily fits into tight applications.
On-board buffer amplifiers enable the widest range of options
Figure 1.
The precision dc output buffer minimizes errors when driving
low impedance loads with extremely low offset voltages, thanks
to internal bias current cancellation. Unlike digital solutions, the
AD8436 has no switching circuitry limiting performance at high or
low amplitudes (see Figure 2). A usable response of <100 μV and
>3 V extends the dynamic range with no external scaling,
accommodating demanding low level signal conditions and
allowing ample overrange without clipping.
GREATER INPUT DYNAMIC RANGE
AD8436
ΔΣ SOLUTION
for any rms-to-dc converter available, regardless of cost. For
100μV
1mV
10mV
100mV
1V
3V
minimal applications, only a single external averaging capacitor
is required. The built-in high impedance FET buffer provides
an interface for external attenuators, frequency compensation,
or driving low impedance loads. A matched pair of internal
resistors enables an easily configurable gain-of-two or more,
extending the usable input range even lower. The low power,
precision input buffer makes the AD8436 attractive for use in
portable multi-meters and other battery-powered applications.
Figure 2. Usable Dynamic Range of the AD8436 vs. ?Σ
The AD8436 operates from single or dual supplies of ±2.4 V
(4.8 V) to ±18 V (36 V). A and J grades are available in a
compact 4 mm × 4 mm, 20-lead chip-scale package; A and B
grades are available in a 20-lead QSOP package. The operating
temperature ranges are ?40°C to 125°C for A and B grades and
0°C to 70°C for J grade.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ?2011–2013 Analog Devices, Inc. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8436JCPZ-R7_PROMO | 制造商:Analog Devices 功能描述:IC RMS TO DC LFCSP-20 |
| AD8436JCPZ-RL | 功能描述:IC CONV TRUE RMS-DC LP 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - RMS 至 DC 转换器 系列:- 标准包装:46 系列:- 电流 - 电源:1.2mA 电源电压:±18 V，36 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| AD8436JCPZ-WP | 功能描述:IC CONV TRUE RMS-DC LP 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - RMS 至 DC 转换器 系列:- 标准包装:46 系列:- 电流 - 电源:1.2mA 电源电压:±18 V，36 V 安装类型:表面贴装 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件 |
| AD843A | 制造商:AD 制造商全称:Analog Devices 功能描述:34 MHz, CBFET Fast Settling Op Amp |
| AD843AQ | 功能描述:IC OPAMP GP 34MHZ 50MA 8CDIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:带卷 (TR) |
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