NA2100AFAE2D

Overview

The NA2100AFAE2D is a voltage-to-frequency converter manufactured by Nisshinbo Micro Devices Inc. using a CMOS process. It operates from a single supply of 3.0 V to 5.25 V and features an internal 2.5 V bandgap reference, with support for external references up to VDD. The full-scale output frequency is synchronized to the clock signal on the CLKIN pin, supporting frequencies from 32 kHz to 1 MHz. The nominal input range is 0 V to VREF. Key electrical characteristics include a maximum integral nonlinearity of ±0.018% of span and low consumption of approximately 3 mW (typical). It includes automatic power-down functionality when the clock input remains low.

Feature Summary

• Synchronous operation where the full-scale output frequency is determined by the external system clock signal applied to the CLKIN pin.
• Configurable analog input buffering via the BUF pin to provide high impedance or accept negative input voltages.
• Integrated 2.5 V bandgap reference voltage with capability to utilize an external reference source.
• Automatic power-down mode activation upon prolonged low-level clock input to minimize quiescent current.

Applications

• Simple analog-to-digital conversion systems
• Isolated transmission circuits utilizing optocouplers
• Industrial equipment requiring voltage monitoring
• Social infrastructure measurement devices

Procurement Notes

Verify that the specific ordering suffix matches the required package type, version, packing direction, and quality grade. Confirm compliance with RoHS and halogen-free standards as indicated in the order information table. Ensure the selected variant aligns with the intended operating temperature range and application environment requirements specified in the datasheet.

Selection Notes

Select this component for applications requiring a synchronous voltage-to-frequency conversion solution with low power consumption. Consider the buffer mode configuration based on the source impedance of the analog input signal. Evaluate the thermal resistance characteristics relative to the PCB layer count to ensure junction temperatures remain within safe operating limits during continuous operation.

Part Context

This device belongs to the NA2100 series of voltage-to-frequency converters produced by Nisshinbo Micro Devices Inc. It is designed for general electronic equipment applications, including office equipment, telecommunications, and measuring instruments. The component utilizes a VSP-8-AF package and is manufactured using mature CMOS process technology.

Replacement Considerations

No public confirmed substitute part numbers are documented in the official datasheet.

FAQ

How does the NA2100 handle power consumption during idle states?

The device automatically enters a power-down mode when the CLKIN pin remains at a low level for approximately 1 ms, reducing the quiescent current significantly.

Can the NA2100 accept analog input voltages below ground?

Yes, when operated in unbuffered mode (BUF = Low), the input circuit accepts analog inputs ranging from -0.15 V to VDD + 0.15 V.

What determines the full-scale output frequency of the converter?

The full-scale output frequency is set by the external system clock signal applied to the CLKIN pin, with the output varying between 10% and 90% of the clock frequency based on the input voltage.