Low Cost
Single or Dual Supply, 5 V to 36 V, u2d1e5 V to u2d1e18 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
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 quies- cent 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.
Specifications
Frequency:
500kHz
Full Scale Range:
0Hz to 500kHz
Linearity %:
0.03%
Supply Voltage Range:
± 5V to ± 18V
Digital IC Case:
DIP
No. of Pins:
8Pins
Product Range:
AD654 Series
MSL:
-
SVHC:
No SVHC (07-Jul-2017)
Base Number:
654
Converter Type:
Voltage / Frequency
IC Temperature Range:
Commercial
Input Voltage Max:
36V
Linearity:
0.03%
Operating Temperature Max:
85°C
Operating Temperature Min:
-40°C
Operating Temperature Range:
-40°C to +85°C
Output Current Max:
20mA
Output Voltage Max:
18V
Supply Current:
2.5mA
Supply Voltage Max:
36V
Supply Voltage Min:
5V
Alternate Descriptions
RS Components
Voltage-frequency converter,AD654JN DIP8
Newark Electronics
Voltage to Frequency Converter, 500 kHz, 0Hz to 500kHz, 0.03 %, 5V to 18V, DIP, 8 RoHS Compliant: Yes
