NJM4151D

Overview

The NJM4151D is a V-F and F-V convertor manufactured by Nisshinbo Micro Devices Inc. It operates on bipolar technology within an operating voltage range of 8V to 22V. The device supports frequency operation from 1.0Hz to 100kHz. It is housed in a DIP8 package outline. The component is designated as Not Recommended for New Design (NRND).

Feature Summary

• Provides simple low-cost A/D conversion via voltage-to-frequency technique.
• Features a precision switched current source and internal one-shot timer.
• Includes logic output and open-collector reset capabilities.

Applications

• FSK data demodulation systems.
• Motor control speed sensing applications.
• Microprocessor-connected analog-to-digital converters.
• Proportional weight measurement systems.
• Temperature to frequency transducers.

Procurement Notes

Verify the NRND status before implementation. Confirm DIP8 package availability. Check datasheet version compatibility. Ensure supply voltage limits are respected. Validate application circuit requirements against absolute maximum ratings.

Selection Notes

Consider the single-supply or split-supply configuration based on input signal polarity. Evaluate linearity requirements; active integrators improve accuracy. Assess response time needs against passive integration networks. Verify op-amp slew rate compatibility for precision modes.

Part Context

Part of the NJM4151 series, which includes the DMP8 variant. The manufacturer was formed by integrating New Japan Radio Co., Ltd. and Ricoh Electronic Devices Co., Ltd. The series offers voltage-to-frequency and frequency-to-voltage conversion capabilities.

Replacement Considerations

NJM4151M is the DMP8 package equivalent within the same series.

FAQ

What is the typical linearity error for the basic single-supply VFC circuit?

The basic single-supply VFC circuit typically exhibits a linearity error of 1%.

How is the full-scale frequency programmed?

Full-scale frequency is programmed by setting the timing resistor R0 and capacitor C0 according to the formula T=1.1R0C0.

Can the NJM4151D operate with negative input voltages?

Yes, when used with an operational amplifier integrator in precision mode, it can accept negative input voltages down to -10V.