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Description
Low Cost Monolithic Voltage-to-Frequency Converter
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FEATURES
Low Cost
Single or Dual Supply, 5V to 36V, ±5V to ±18V
Full-Scale Frequency Up to 500kHz
Minimum Number of External Components Needed
Versatile Input Amplifier
Positive or Negative Voltage Modes
Negative Current Mode
High Input Impedance,Low Drift
Low Power: 2.0mA Quiescent Current
Low Offset: 1mV
PRODUCT DESCRIPTION
The AD654 is a monolithic V/F converter consisting of an input amplifier, a precision oscillator system, and a high current output stage.A single RC network is all that is required to set up any full scale (FS) frequency up to 500kHz and any FS input voltage up to ±30V. Linearity error is only 0.03% for a 250kHz FS, and operation is guaranteed over an 80dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ±50 ppm/℃. The AD654 operates from a single supply of 5V to 36V and consumes only 2.0mA quiescent current.
The low drift (4μV/℃ typ) input amplifier allows operation directly from small signals such as thermocouples or strain gauges while offering a high (250 MΩ) input resistance.Unlike most V/F converters, the AD654 provides a square-wave output, and can drive up to 12 TTL loads, optocouplers, long cables, or similar loads.
PRODUCT HIGHLIGHTS
1.Packaged in both an 8-lead mini-DIP and an 8-lead SOIC package, the AD654 is a complete V/F converter requiring only an RC timing network to set the desired full-scale frequency and a selectable pull-up resistor for the open-collector output stage.Any full scale input voltage range from 100mV to 10volts (or greater, depending on +Vs) can be accommodated by proper selection of the timing resistor.The full-scale frequency is then set by the timing capacitor from the simple relationship, f = V/10 RC.
2. A minimum number of low cost external components are necessary.A single RC network is all that is required to setup any full scale frequency up to 500kHz and any full-scale input voltage up to +30V.
3.Plastic packaging allows low cost implementation of the standard VFC applications: A/D conversion, isolated signal transmission, F/V conversion, phase-locked loops, and tuning switched-capacitor filters.
4.Power supply requirements are minimal; only 2.0mA of quiescent current is drawn from the single positive supply from 4.5 volts to 36 volts. In this mode, positive inputs can vary from 0 volts (ground) to (+Vs-4) volts. Negative inputs can easily be connected for below ground operation.
5.The versatile open-collector output stage can sink more than 10mA with a saturation voltage less than 0.4 volts.The Logic Common terminal can be connected to any level between ground (or -Vs) and 4 volts below +Vs.This allows easy direct interface to any logic family with either positive or negative logic levels.
Preview of the first 3 pages of the data sheet
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10000 buyer reviews from United States
Kenneth Harris
Length of registration:7 years
I recently purchased the integrated circuit AD654JN from Utsource, and I am very pleased with the product. The chip arrived quickly and was well packaged. After testing the chip, I found that it worked perfectly and met all of my expectations. The chip was easy to install and the performance was excellent. I would highly recommend Utsource for anyone looking for qu integrated circuits.
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03/17/2023
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Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
AD654JN
AD654JN has several brands around the world that may have alternate names for AD654JN due to regional differences or acquisition. AD654JN may also be known as the following names:
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Unit Price:8.38200
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