Datasheet for AD737:
- Manufacturer Part Number : AD737
- Manufacturer : AD
- Description : Low Cost, Low Power, True RMS-to-DC Converter
- Series : AD737
- Reference Price : USD 8.96
- Our Price : We have a better price, contact us by email
- Product Type : RMS to DC Converters
- Function : -
- Current Suggest : Not Recommended for New Designs
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : AD737
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
Contact us to check the best price and real time inventory quantity for AD737. If you need any more information about AD737, you can also send us by email. Our email is [email protected], we will reply you in 12 hours.
- Computes
True rms value
Average rectified value
Absolute value - 200 mV full-scale input range (larger inputs with input attenuator)
- Direct interfacing with 3½ digit CMOS analog-to-digital (ADCs)
- High input impedance: 1012 Ω
- Low input bias current: 25 pA maximum
- High accuracy: ±0.2 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: 25 μA (typical) standby current
- No external trims needed for specified accuracy
- The AD737 output is negative-going; the AD736 is a positive output-going version of the same basic device
The AD737 computes the rms value of both the ac and dc input voltages, and is ac-coupled by adding an input capacitor. In this mode, the AD737 can resolve input signal levels of 100 μV rms or less, despite variations in temperature or supply voltage. High accuracy is maintained for input waveforms with crest factors of 1 to 3 and crest factors at 2.5% or less with respect to full-scale input level.
The AD737 has no output buffer amplifier, thereby significantly reducing dc offset errors occurring at the output, which makes the device highly compatible with high input impedance ADCs.
Requiring only 160 μA of power supply current, the AD737 is optimized for use in portable multimeters and other battery-powered applications. In power-down mode, the standby supply current in is typically 25 μA.
The AD737 has both high (1012 Ω) and low impedance input options. The high-Z FET input connects high source impedance input attenuators, and a low impedance (8 kΩ) input accepts rms voltages of up to 0.9 V while operating from the minimum power supply voltage of ±2.5 V. The two inputs can be used either single ended or differentially.
The AD737 achieves 1% of reading error bandwidth, exceeding 10 kHz for input amplitudes from 20 mV rms to 200 mV rms, while consuming only 0.72 mW.
The AD737 is available in two performance grades. The AD737J and AD737K grades operate over the commercial temperature range of 0°C to 70°C. The AD737JR-5 is tested with supply voltages of ±2.5 V dc. The AD737A grade operates over the industrial temperature range of −40°C to +85°C. The AD737 is available in two low cost, 8-lead packages: PDIP and SOIC_N.
Product Highlights
- Computes average rectified, absolute, or true rms value of a signal regardless of waveform.
- Only one external component, an averaging capacitor, is required for the AD737 to perform true rms measurement.
- The standby power consumption of 125 μW makes the AD737 suitable for battery-powered applications.
This designates products ADI does not recommend broadly for new designs.
