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Start Production of NJL5821R and NJL5822R, Encoder with Optical Reflection Type

2022-07-21 | Return

- Contribute to Miniaturization of Set and Reduction of Mounting Area –

Nisshinbo Micro Devices Inc. has started production of the NJL5821R and the NJL5822R, two-phase digital output encoders with optical reflection type, which are suitable for detecting rotation direction and position.

Overview

In recent years, there has been an increase in demand for rotation detection for small motors and operation dials, as well as for compact position detection to meet higher precision requirements for linear actuators and other equipment. The NJL5821R and the NJL5822R, two-phase digital output encoders with optical reflection type, achieve low operating current thanks to a newly designed photodetector IC and a high output infrared LED. In conventional position detection such as linear or rotation direction, it is necessary to adjust the distance between the sensor and the striped mirror to be constant. The NJL5821R and the NJL5822R achieve high resistance to the distance variation thanks to the unique processing of the photo detect level of the photodetector.

From left, the NJL5821R and the NJL5822R. (COB Package)

Features

1. Resistant to Distance Variation to Striped Mirror
In conventional position detection such as linear or rotation direction, it is necessary to adjust the distance between the sensor and the striped mirror to be constant. The NJL5821R and the NJL5822R achieve excellent robustness*1, simplified integration into equipment, and resistance to distance variation by processing the reflected light from the recommended reflector (striped mirror) in a unique manner. In addition, there is almost no variation in duty cycle and phase difference even when the distance between the sensor and the striped mirror is varied.

*1 Characteristics not affected by sensor installation accuracy or external environment variation

2. Integration into Motors Directly Thanks to a Wide Operating Temperature Range (Industry's Highest Temperature)
The NJL5821R and the NJL5822R have succeeded in raising the operating temperature to 105°C at the high temperature side. This allows direct integration into products such as motors that are required to operate in high temperature environments.

3. Low Operating Current Design Including Drive Current of Light Emitting Device (LED)
The NJL5821R and the NJL5822R realize low operating current design that can be used in battery-powered equipment thanks to the combination of a high-output infrared LED and a highly sensitive photodetector IC with low operating current. It can be operated with 1/5 of the drive current of conventional products from other companies.*2

*2 Based on Nisshinbo Micro Devices Inc. research, as of July 2022.

4. Available for Detection of Rotation (Movement) Direction and Position by Two-Phase Digital Output
The NJL5821R and the NJL5822R can obtain two-phase digital output easily using with recommended reflectors and can detect the direction of rotation (movement) and position.

5. Available for Industrial Applications Thanks to High Resolution of 150 LPI and 180 LPI
The NJL5821R and the NJL5822R achieve higher resolution than the conventional product of NJL5820R and are available for use in wide applications such as industrial equipment and cameras.

Resolution / Recommended Operating Conditions Comparison Table

Product Name	Resolution	Recommended Operating Conditions			Production Status
Product Name	Resolution	Forward Current	Supply Voltage	Distance to reflector	Production Status
NJL5820R	50.8 LPI	2 to 30 mA	2.7 to 5.5 V	0.2 to 5.0 mm	Under Production
NJL5821R	150 LPI	4 to 30 mA	2.7 to 5.5 V	0.5 to 5.0 mm	Start Production
NJL5822R	180 LPI	4 to 30 mA	2.7 to 5.5 V	0.5 to 5.0 mm	Start Production

Recommended Reflector (Striped Mirror)

Product Name	Recommended Reflector (Striped Mirror)
Product Name	Direct Reflection/Non-reflection	Size	Reflectance
NJL5820R (Current product)	Direct Reflection	0.250 mm	>70%
NJL5820R (Current product)	Non-Reflection	0.250 mm	<20%
NJL5821R	Direct Reflection	0.085 mm	>70%
NJL5821R	Non-Reflection	0.085 mm	<20%
NJL5822R	Direct Reflection	0.070 mm	>70%
NJL5822R	Non-Reflection	0.070 mm	<20%

* In the case of use the striped mirror made by Meltec Corporation.

Pin Descriptions

PIN NO.	SYMBOL	DESCRIPTION
1	Cathode (LED)	Cathode for LED
2	GND	GND
3	Vout2	Output2
4	Vout1	Output1
5	V+	Power Supply
6	Anode (LED)	Anode for LED

* Common to the NJL5821R and the NJL5822R

Product Overview

Item	NJL5821R / NJL5822R
Package	2.6 x 2.5 x 0.8 mm COB package
Operating Voltage	2.7 V to 5.5 V
Operating Temperature Range	-30°C to 105°C
Output Type	Incremental Output Type
Output	Two-Phase Digital Output: A, B phase
Resolution	NJL5821R: 150 LPI NJL5822R: 180 LPI
Sample Price (per 100 pieces)	NJL5821R: JPY 495 (Tax included) NJL5822R: JPY 550 (Tax included)
Monthly Production	100,000 pieces

* Price is based on the consumption tax rate as of July 2022.

▶ For more details about the NJL5821R
▶ For more details about the NJL5822R

Example of Detection Method

Applications
● Rotation detection of operation dials
● Rotation detection of zoom motors for imaging equipment
● Incremental encoder

Source: https://www.nisshinbo-microdevices.co.jp