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AD736 Datasheet

AD736 Datasheet

Low Cost, Low Power, True RMS-to-DC Converter
Part No.: AD736
Page: 20 Pages
Size: 456 KB
Manufacturer: Analog Devices, Inc.
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Views: 1
Update Time: 2025-01-03 17:58:36
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AD736 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
AD736AQ Tube 48 AD736AQ 1 8 -40°C ~ 85°C 8-Lead CERDIP  
AD736BQ Tube 48 AD736BQ 1 8 -40°C ~ 85°C 8-Lead CERDIP  
AD736AR-REEL Reel 2500   1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736AR-REEL7 Reel 1000   1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736ARZ Tube 98 AD736A 1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736ARZ-R7 Reel 1000 AD736A 1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736ARZ-RL Reel 2500 AD736A 1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736BR-REEL Reel 2500   1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736BR-REEL7 Reel 1000   1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736BRZ Tube 42 AD736B 1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736BRZ-R7 Reel 1000 AD736B 1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736BRZ-RL Reel 2500 AD736B 1 8 -40°C ~ 85°C 8-Lead SOIC_N  
AD736JN Tube 50 AD736JN 1 8 -0°C ~ 70°C 8-Lead PDIP  
AD736JNZ Tube 50 AD736JNZ 1 8 -0°C ~ 70°C 8-Lead PDIP  
AD736KNZ Tube 50 AD736KNZ 1 8 -0°C ~ 70°C 8-Lead PDIP  
AD736JR Tube 98 AD736J 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736JR-REEL Reel 2500 AD736J 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736JR-REEL7 Reel 750 AD736J 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736JRZ Tube 98 736JRZ 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736JRZ-RL Reel 2500 736JRZ 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736JRZ-R7 Reel 1000 736JRZ 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736KRZ Tube 98 736KRZ 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736KRZ-RL Reel 2500 736KRZ 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
AD736KRZ-R7 Reel 1000 736KRZ 1 8 -0°C ~ 70°C 8-Lead SOIC_N  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

AD736 Datasheet(PDF)

AD736 Datasheet(Picture)

AD736 Features

  • Converts an ac voltage waveform to a dc voltage and then converts to the true rms, average rectified, or absolute value 200 mV rms full-scale input range (larger inputs with input attenuator)
  • High input impedance: 1012 Ω 
  • Low input bias current: 25 pA maximum
  • High accuracy: ±0.3 mV ± 0.3% of reading
  • RMS conversion with signal crest factors up to 5
  • Wide power supply range: +2.8 V, −3.2 V to ±16.5 V
  • Low power: 200 μA maximum supply current
  • Buffered voltage output
  • No external trims needed for specified accuracy
  • Related device: the AD737 features a power-down control with standby current of only 25 μA; the dc output voltage is negative and the output impedance is 8 kΩ

AD736 Description

The AD736 is a low power, precision, monolithic true rms-to-dc converter. It is laser trimmed to provide a maximum error of ±0.3 mV ± 0.3% of reading with sine wave inputs. Furthermore, it maintains high accuracy while measuring a wide range of input waveforms, including variable duty-cycle pulses and triac (phase)-controlled sine waves. The low cost and small size of this converter make it suitable for upgrading the performance of non-rms precision rectifiers in many applications. Compared to these circuits, the AD736 offers higher accuracy at an equal or lower cost.

The AD736 can compute the rms value of both ac and dc input voltages. It can also be operated as an ac-coupled device by adding one external capacitor. In this mode, the AD736 can resolve input signal levels of 100 μV rms or less, despite variations in temperature or supply voltage. High accuracy is also maintained for input waveforms with crest factors of 1 to 3. In addition, crest factors as high as 5 can be measured (introducing only 2.5% additional error) at the 200 mV full-scale input level.

The AD736 has its own output buffer amplifier, thereby pro-viding a great deal of design flexibility. Requiring only 200 μA of power supply current, the AD736 is optimized for use in portable multimeters and other battery-powered applications.

The AD736 allows the choice of two signal input terminals: a high impedance FET input (1012 Ω) that directly interfaces with High-Z input attenuators and a low impedance input (8 kΩ) that allows the measurement of 300 mV input levels while operating from the minimum power supply voltage of +2.8 V, −3.2 V. The two inputs can be used either single ended or differentially.

The AD736 has a 1% reading error bandwidth that exceeds 10 kHz for the input amplitudes from 20 mV rms to 200 mV rms while consuming only 1 mW.

The AD736 is available in four performance grades. The AD736J and AD736K grades are rated over the 0°C to +70°C and −20°C to +85°C commercial temperature ranges. The AD736A and AD736B grades are rated over the −40°C to +85°C industrial temperature range. The AD736 is available in three low cost, 8-lead packages: PDIP, SOIC, and CERDIP.

AD736 Related Parts

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