AD8436 AD [Analog Devices], AD8436 Datasheet
AD8436
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AD8436 Summary of contents
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... Figure 2. Usable Dynamic Range of the The AD8436 operates from single or dual supplies of ±2 ±18 V (36 V). A and J grades are available in a compact 4 mm × 4 mm, 20-lead chip-scale package. The operating temperature ranges are −40°C to 125°C and 0°C to 70°C. ...
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... REVISION HISTORY 7/11—Revision 0: Initial Version Test Circuits........................................................................................9 Theory of Operation ...................................................................... 10 Overview ..................................................................................... 10 Applications Information .............................................................. 12 Using the AD8436....................................................................... 12 AD8436 Evaluation Board......................................................... 16 Outline Dimensions ....................................................................... 18 Ordering Guide .......................................................................... 18 Rev Page ...
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... S 7.92 15.68 −V S −V + 0.2 S −1 100 −9.9 −200 −V + 0.0005 S ±2.4 4.8 Rev Page AD8436 = 10 μF, unless otherwise specified. AVG Typ Max Unit ±0 ± 0 ±10 + 0.5 μV/% rdg 0.006 %/°C ±0.013 ±%/V 0 +500 μ 0.3 μV/°C ±0.5 ± ...
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... AD8436 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage Internal Power Dissipation Input Voltage Output Short-Circuit Duration Differential Input Voltage Temperature Operating Range Storage Range Lead Soldering (60 sec) ESD Rating Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...
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... Exposed Pad. The exposed pad should not be connected. SUM CAVG CCF VCC IBUFV DNC PIN 1 INDICATOR RMS AD8436 TOP VIEW (Not to Scale IBUFGN DNC OGND OUT VEE Figure 3. Pin Configuration, Top View Rev Page OBUFV+ OBUFOUT OBUFIN– OBUFIN+ IGND 11 10 AD8436 ...
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... AD8436 TYPICAL PERFORMANCE CHARACTERISTICS T = 25°C, ±V = ± μF, 1 kHz sine wave, unless otherwise indicated AVG 5V 1V 100mV 10mV 1mV 100µV 50µV 50 100 1k 10k FREQUENCY (Hz) Figure 4. RMS Core Frequency Response (See Figure 20 100mV 10mV 1mV 100µV 50µ ...
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... Figure 15. RMS Core Supply Current vs. Input for V Rev Page 100µs W CAVG = 10µF CCF = 0.1µF CAVG = 10µ CREST FACTOR RATIO Capacitor Combinations – 100 TEMPERATURE (° ±15V ± ±2.4V S 0.5 1.0 1.5 INPUT VOLTAGE (V rms) = ±2.4 V, ±5 V, and ± AD8436 10 125 2.0 ...
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... AD8436 −10 −50 − TEMPERATURE (°C) Figure 16. FET Input Buffer Bias Current vs. Temperature 1000 750 500 250 0 −250 −500 −750 −1000 −50 − TEMPERATURE (°C) Figure 17. Input Offset Voltage of FET Buffer vs. Temperature 250 200 ...
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... PRECISION DMM OUT OGND PRECISION DMM Figure 22. Crest Factor Test Circuit Rev Page 10µF +5V VCC 100kΩ IGND 100kΩ VEE –5V 4.80V VCC 100kΩ IGND 4.7µF 100kΩ VEE +5V VCC 100kΩ IGND 100kΩ VEE –5V AD8436 ...
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... AD8436 THEORY OF OPERATION OVERVIEW The AD8436 is an implicit function rms-to-dc converter that renders a dc voltage dependent on the rms (heating value voltage. In addition to the basic converter, this highly integrated functional circuit block includes two fully independent, optional amplifiers, a standalone FET input buffer amplifier and a precision dc output buffer amplifier (see Figure 1) ...
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... Rev Page AD8436 is a translinear rms-to-dc converter with exceptional ∆Σ OR OTHER DIGITAL SOLUTIONS CANNOT WORK AT ZERO VOLTS AD8436 SOLUTION –20 – INPUT VOLTAGE (mV DC) Figure 24. DC Transfer Function near Zero 30 ...
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... For example, for –0.5% rms at 100 Hz, the capacitor value is 1 μF. Post Conversion Ripple Reduction Filter Input rectification included in the AD8436 introduces a residual ripple component that is dependent on the value of CAVG and twice the input signal frequency. For sampling ...
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... An input coupling capacitor must be used to realize the near-zero output offset voltage feature of the AD8436. Select a coupling capacitor value that is appropriate for the lowest expected operating frequency of interest rule of thumb, the input coupling capacitor can be the same as or half the value of the averaging capacitor because the time constants are similar ...
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... Using the Output Buffer The AD8436 for dc operation. Figure 33 shows a block diagram of the basic amplifier and I/O pins. The amplifier is intended for noninverting operation only; note that the 16 kΩ resistor, in series with the inverting input of the amplifier, is used to balance the bias current of the noninverting amplifier ...
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... VCC 10µF 0.1µ SUM CAVG CCF VCC IBUFV+ 1 DNC OBUFV+ AD8436 2 RMS OBUFOUT 3 IBUFOUT OBUFIN– 4 IBUFIN– OBUFIN+ 5 IBUFIN+ IGND IBUFGN DNC OGND OUT VEE VEE 3.3µF Figure 39. Typical Application Circuit AD8436 4.7µ OUT ...
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... Figure 44 illustrate the various design details of the board, including a basic layout and copper patterns. These figures are useful for reference for application designs. A Word About Using the AD8436 Evaluation Board The AD8436-EVALZ offers many options, without sacrificing simplicity. The board is tested and shipped with a 10 μF averaging capacitor (CAVG), 3.3 μ ...
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... BUF TIBUFOUT 3 IBUFOUT TACIN RFBH 0Ω TIBFIN– IBUFIN– 0.47µF RFBL DNI TIBFIN+ 5 IBUFIN+ R1 IBUFGN 1MΩ 6 TBUFGN R5 0Ω Figure 45. Photograph of the AD8436-EVALZ CAVE 10µF C4 TIBUFV+ + COPT 0.1µF EN 0.1µF TCAVE TOPT IBUF_VCC CAVG DNC VCC IBUF TOBUFV+ V+ ...
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... SEATING PLANE ORDERING GUIDE 1 Model Temperature Range AD8436ACPZ-R7 −40°C to +125°C AD8436ACPZ-RL −40°C to +125°C AD8436ACPZ-WP −40°C to +125°C AD8436JCPZ-R7 0°C to +70°C AD8436JCPZ-RL 0°C to +70°C AD8436JCPZ-WP 0°C to +70°C AD8436-EVALZ RoHS Compliant Part. 4.10 0.30 4.00 SQ 0.25 3.90 0.20 16 0.50 15 BSC ...
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... NOTES Rev Page AD8436 ...
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... NOTES ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10033-0-7/11(0) Rev Page AD8436 ...