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MFG:ADI D/C:09
Part Number: AD654
MFG: ADI
D/C: 09
Description: The AD654 is a monolithic V/F converter consisting of an input amplifier, a precision oscillator syste...
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AD654
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DataSheet
General Description
AD654 General 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 500 kHz and any FS input voltage up to ± 30 V. Linearity error is only 0.03% for a 250 kHz FS, and operation is guaranteed over an 80 dB dynamic range. The overall temperature coefficient (excluding the effects of external components) is typically ±50 ppm/°C. The AD654 operates from a single supply of 5 V to 36 V and consumes only 2.0 mA quiescent current.
The low drift (4 µV/°C 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.
AD654 Maximum Ratings
Total Supply Voltage +VS to VS . . . . . . . . . . . . . . . . . . .36 V
Maximum Input Voltage
(Pins 3, 4) to VS . . . . . . . . . . . . . . . . . . . . 300 mV to +VS
Maximum Output Current
Instantaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mA
Sustained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA
Logic Common to VS . . . . . . . . . . . . . . . 500 mV to (+VS 4)
Storage Temperature Range . . . . . . . . . . . . 65°C to +150°C
Maximum Input Voltage
(Pins 3, 4) to VS . . . . . . . . . . . . . . . . . . . . 300 mV to +VS
Maximum Output Current
Instantaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mA
Sustained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA
Logic Common to VS . . . . . . . . . . . . . . . 500 mV to (+VS 4)
Storage Temperature Range . . . . . . . . . . . . 65°C to +150°C
AD654 Features
Low Cost
Single or Dual Supply, 5 V to 36 V, 65 V to 618 V
Full-Scale Frequency Up to 500 kHz
Minimum Number of External Components Needed
Versatile Input Amplifier
Positive or Negative Voltage Modes
Negative Current Mode
High Input Impedance, Low Drift
Low Power: 2.0 mA Quiescent Current
Low Offset: 1 mV
Single or Dual Supply, 5 V to 36 V, 65 V to 618 V
Full-Scale Frequency Up to 500 kHz
Minimum Number of External Components Needed
Versatile Input Amplifier
Positive or Negative Voltage Modes
Negative Current Mode
High Input Impedance, Low Drift
Low Power: 2.0 mA Quiescent Current
Low Offset: 1 mV
AD654
PDF/DataSheet Download
- Datasheet: AD654
- File Size: 200832 KB
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