AD8436JCPZ-R7

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Series Information for AD8436JCPZ-R7 - Analog Devices

Features

  • feature
    Delivers true rms or average rectified value of ac waveform Fast settling at all input levels Accuracy: u00b110 u03bcV u00b1 0.25% of reading (B grade) Wide dynamic input range 100 u03bcV rms to 3 V rms (8.5 V p-p) full-scale input range Larger inputs with external scaling Wide bandwidth: 1 MHz for u22123 dB (300 mV) 65 kHz for additional 1% error Zero converter dc output offset No residual switching products Specified at 300 mV rms input Accurate conversion with crest factors up to 10 Low power: 300 u00b5A typical at u00b12.4 V High-Z FET separately powered input buffer RIN u2265 1012 u03a9, CIN u2264 2 pF Precision dc output buffer Wide power supply voltage range Dual: u00b12.4 V to u00b118 V; single: 4.8 V to 36 V 4 mm u00d7 4 mm LFCSP and 8 mm u00d7 6 mm QSOP packages ESD protected
AD8436JCPZ-R7 image
RoHS Compliant

Description

RMS TO DC 20LFCSP

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 waveforms, 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 for any rms-to-dc converter available, regardless of cost. For 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. 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.

Specifications

Accuracy %:
0.5%
Bandwidth:
1MHz
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Digital IC Case:
LFCSP
No. of Pins:
20Pins
Supply Voltage Range:
800mV to 3.6V
Product Range:
AD8436 Series
RoHS Phthalates Compliant:
Yes
MSL:
MSL 3 - 168 hours
SVHC:
No SVHC (07-Jul-2017)
Base Number:
8436
Operating Temperature Range:
0°C to +70°C
Power Dissipation Pd:
18mW
Supply Current:
325µA