Encoder Photo IC
Photo IC for Optical Encoder
A new encoder photo IC with a built-in multiplier circuit (photo IC for optical encoders), built on a 0.25μm BiCMOS process.
By integrating the photodetector, amplifier circuit and multiplier circuit on a single chip, we achieved a compact size and low power consumption.
Features
- The same IC supports any base resolution within the upper and lower base resolution limits (EC1 to EC4)
- The general-purpose type supports any resolution through a fixed mask (EC5)
- ×1/×2/×4/×8 multiplication (switchable via external pins), achieving a maximum resolution of 2400 ppr
- Outputs phase A, phase B and phase Z signals. Phase B inverted output available
- Space-saving BGA package / lead-free
Specifications
Technical Data
| Item | Specification |
|---|---|
| Process | 0.25μm BiCMOS |
| Configuration | Photodetector, amplifier circuit and multiplier circuit integrated on a single chip |
| Multiplication | ×1/×2/×4/×8 (switchable via external pins) |
| Maximum resolution | 2400 ppr |
| Output signals | Phase A, phase B and phase Z (phase B inverted output available) |
| Resolution setting | EC1 to EC4: any base resolution within the upper and lower base resolution limits / EC5: any resolution through a fixed mask |
| Package | BGA package (space-saving) / lead-free |
Absolute Maximum Ratings (preliminary)
| Item | Unit | Rating | Remarks |
|---|---|---|---|
| Supply voltage | V | −0.5 to 6.0 | |
| Input voltage | V | −0.5 to Vcc+0.5 | |
| Operating temperature range | °C | −10 to +70 | No condensation or dust |
| Storage temperature | °C | 30 to +80 | No condensation or dust |
Electrical and Optical Characteristics (preliminary)
| Item | Symbol | MIN | TYP | MAX | Unit | Remarks |
|---|---|---|---|---|---|---|
| Supply voltage | Vcc | 4.5 | 5.5 | V | ||
| Reference voltage | Vref | 1/2Vcc | V | Tolerance ±10% | ||
| Analog input frequency | fin | 100 | kHz | |||
| High output voltage | VOH | 4.5 | V | *1 | ||
| Low output voltage | VOL | 0.5 | V | *2 | ||
| Current consumption | Icc | 20 | mA | |||
| Output phase error | E | 12.5 | % | *3 | ||
| Sensitivity | Vp | 1 | V | *4 | ||
| Maximum amplitude range | Vpp | Gnd+1.0 | Vcc−1.3 | V | ||
| Power-on reset time | Tor | 2.5 | 4 | ms | *5 |
*1: 10kΩ pull-down
*2: 10kΩ pull-up
*3: At ×8 multiplication. Measured by injecting a 10 kHz sine wave using an LED and applying an electrical signal (sine waves with a phase difference) through the test pin
*4: A/A- or B/B- input, λ=850nm, Po=2.5μW incident
*5: With external capacitor: 0.033μF
Note: The absolute maximum ratings, electrical and optical characteristics, dynamic chart and outline dimensions are preliminary. For details, see the catalog PDF or contact us.
Multiplier ICs
Multiplier ICs
We offer three multiplier ICs that increase the resolution of encoder signals: ×2, ×5 and ×10.
| Product | Resolution | Offset cancellation | Package | Supply voltage |
|---|---|---|---|---|
| ×2 multiplier IC | Doubles the signal resolution | Built-in cancellation of the offset component of the input signal | Ultra-compact 4 mm square QFN package or bare chip | 5 V, 3.3 V |
| ×5 multiplier IC | Increases the signal resolution 5 times | Built-in cancellation of the offset component of the input signal | Ultra-compact 4 mm square QFN package or bare chip | 5 V, 3.3 V |
| ×10 multiplier IC | Increases the signal resolution 10 times | Built-in offset cancellation for the input signal | Ultra-compact 4 mm square QFN package or bare chip | 5 V, 3.3 V |
Amplifier IC
Amplifier ICs for Sensors
- Front-end amplifier IC (for photodiodes): samples available
- Front-end amplifier IC (for photodiode arrays): samples available
Applications
Typical Uses
- Photodetection and signal processing for optical encoders
For anything optical, talk to us first.
You do not need finalized specifications. We will work with you on the design of the entire photodetection system.