NJM4151D NJR, NJM4151D Datasheet - Page 5

• Manufacturer Part Number: NJM4151D
• Description: IC V-F/F-V CONVERTER 8DIP
• Manufacturer: NJR
• Type: Volt to Freq & Freq to Voltr

Specifications of NJM4151D

• Frequency - Max: 100kHz
• Full Scale: ±100ppm/°C
• Linearity: ±1%
• Mounting Type: Through Hole
• Package / Case: 8-DIP
• Supply Voltage (max): 22 V
• Supply Voltage (min): 8 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Full Scale Frequency: 100 KHz
• Mounting Style: Through Hole
• Operating Supply Voltage: 9 V, 12 V, 15 V, 18 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3. Precision Voltage-to-Frequency Converter
linearity of 0.05 over the range of 0 to -10V. Offset is adjustable to zero. Unlike many VFC designs which lose linearity
below 10mV, this circuit retains linearity over the full range of input voltage, all the way to 0V.
10Hz with an input voltage of -10mV.
source, Pin 1, at a constant 0V. Therefore linearity error due to the current source output conductance is eliminated. The
diode connected around the op-amp prevents the voltage at NJM4151 pin 7 from going below 0. Use a low-leakage
diode here, since any leakage will degrade the accuracy. This circuit can be operated from a single positive supply if an
NJM3403A ground-sensing op-amp is used for the integrator. In this case, the diode can be left out. Note that even
though the circuit itself will operate from a single supply, the input voltage is necessarily negative. For operation above
10kHz, bypass NJM4151 pin 6 with 0.01µF.
Ver.2004-10-25
In this application (Figure 4) the NJM4151 VFC is used with an operational amplifier integrator to provide typical
Trim the full scale adjust pot at V
The operational amplifier integrator improves linearity of this circuit over that of Figure 2 by holding the output of the
Figure 3. Precision Voltage-to-Frequency Converter Single Supply
Figure 4. Precision Voltage-to-Frequency Converter
I
= -10V for an output frequency of 10kHz. The offset adjust pot should be set for
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