Intersil's ISL76534 is an ultra-low-power 14-way tunable Gamma buffer with integrated EEPROM for automotive entertainment and ADAS displays. The device includes an I2C programmable 10-bit 14-channel Gamma reference generator, 10 Bit programmable VCOM calibrator, high output current VCOM amplifier and EEPROM for storing all reference voltage data. Analog operating voltage 6.3V-19V, digital working voltage 2.25V-3.6V, mainly used in automotive entertainment system displays, automotive center entertainment systems Display (CID), automotive smart mirror, automotive dashboard display and automotive TFT-LCD display. This article introduces the main features of ISL76534, block diagram and TFT-LCD GAMMA reference voltage generator circuit diagram, as well as evaluation board ISL76534EVAL1Z indicators and main features, block diagram, Circuit diagram, bill of materials and PCBV design.
14-Channel Programmable Gamma Buffer for Infotainment and ADAS Displays Ultra-Low Power 14-Channel Programmable Gamma Buffer with Integrated EEPROM The ISL76534 is a programmable gamma buffer for TFT-LCDsfeaturing ultra-low power operaTIon. The ISL76534 contains anI2C programmable, 10-bit , 14-channel gamma reference voltage generator with buffered outputs, a 10-bitprogrammable VCOM calibrator, a high output current VCOMamplifier, and internal EEPROM to store all reference voltagedata. The EEPROM features an endurance of 10,000 writecycles and a data retenTIon of 20 years at 105 °C.
Combining gamma and VCOM reference voltage generators with low power operaTIon and EEPROM, the ISL76534 provides a complete reference voltage soluTIon ideal for TFT-LCDdisplays.
The ISL76534 is available in a super thin (height = 0.4mmmaximum) 28 Ld 4mmx5mm X2QFN thermal enhanced package. The device is specified for operation across the ambient temperature -40°C to +105°C.
Main features of ISL76534:
• 14-channel gamma references, 10-bit resolution withbuffered outputs
• 1-channel VCOM calibrator with 10-bit resolution
• High output current VCOM amplifier
• Ultra-low power operation, ideal for automotive displays: Typical quiescent power, 12mW at 8V AVDD
• EEPROM data retention: 20 years at 105°C
• EEPROM endurance: 10,000 write cycles
- Read/write capable over 2.25V to 3.6V DVDD range
• 6.3V to 19V analog supply operating range
• 2.25V to 3.6V digital supply operating range
• Power Supply Rejection Ratio (PSRR): 75dB typical
• 28 Ld 4mmx5mm super thin X2QFN package
• Pb-free (RoHS compliant)
• AEC-Q100 qualified
ISL76534 application:
• Automotive infotainment display
• Automotive Center Information Display (CID)
• Automotive smart mirrors
• Automotive instrument cluster display
• Automotive TFT-LCD display
Figure 1. Block diagram of ISL76534
Figure 2. Typical application of ISL76534: TFT-LCD GAMMA reference voltage generator
Figure 3. Typical application of ISL76534: TFT-LCD GAMMA and VCOM reference generator
Figure 4. Typical application of ISL76534: TFT-LCD GAMMA reference generator: VCOM amplifier cannot
Evaluation Board ISL76534EVAL1Z
The ISL76534EVAL1Z is a complete platform for the evaluation of all datasheet specifications and functionalities of the programmable gamma buffer. The ISL76534 contains anI2C programmable, 10-bit, 14-channel gamma reference voltage generator with buffered outputs, a 10-bit programmableVCOM calibrator, a high output current VCOM amplifier and aninternal EEPROM to store all reference voltage data. The EEPROM features an endurance of 10,000 write cycles and adata retention of 20yrs at 105 °C.
The ISL76534EVAL1Z board is intended to provide anevaluation platform for the 4mmx5mm X2QFN ISL76534package, programmable gamma buffer.
Evaluation board ISL76534EVAL1Z indicators:
• Ambient temperature range, -40°C to +105°C
• Analog supply voltage, AVDD = 6.3V to 19V
• Digital supply voltage, DVDD = 2.25 to 3.6V
• Output channels x14, OUTx = 0V to AVDD-Headroom
• Output channel x1, VCOM = 0V to AVDD-Headroom
Evaluation board ISL76534EVAL1Z main features:
• 15-Channel reference voltage outputs, I2C programmable:
- 14-channel gamma references, 10-bit resolution withbuffered outputs
- 1-channel VCOM calibrator with 10-bit resolution
• High output current VCOM amplifier
• Ultra-low power operation, ideal for tablet and mobileapplications: typical quiescent power, 12mW at 8V AVDD
• EEPROM data retention: 20yrs at 105°C
• EEPROM endurance: 10,000 write cycles
- Read/write capable over 2.25V to 3.6V DVDD range
• 6.3V to 19V analog supply operating range
• 2.25V to 3.6V digital supply operating range
• 28 Ld 4x5mm super thin X2QFN package
• Pb-free (RoHS compliant)
• AEC-Q100 qualified
Figure 5. Outline of the evaluation board ISL76534EVAL1Z
Figure 6. Evaluation Board ISL76534EVAL1Z Block Diagram
Figure 7. Evaluation board ISL76534EVAL1Z circuit diagram (1)
Figure 8. Evaluation board ISL76534EVAL1Z circuit diagram (2)
Evaluation Board ISL76534EVAL1Z Bill of Materials:
Figure 9. Evaluation Board ISL76534EVAL1Z PCB Design (1): Top Screen Printing
Figure 10. Evaluation Board ISL76534EVAL1Z PCB Design (2): Top Component
Figure 11. Evaluation Board ISL76534EVAL1Z PCB Design (3): Inner Layer 2
Figure 12. Evaluation Board ISL76534EVAL1Z PCB Design (4): Inner Layer 3
Figure 13. Evaluation board ISL76534EVAL1Z PCB design (5): bottom layer soldering
Figure 14. Evaluation Board ISL76534EVAL1Z PCB Design (6): Underlying Silk Screen
Absolute rotary Encoder measure actual position by generating unique digital codes or bits (instead of pulses) that represent the encoder`s actual position. Single turn absolute encoders output codes that are repeated every full revolution and do not output data to indicate how many revolutions have been made. Multi-turn absolute encoders output a unique code for each shaft position through every rotation, up to 4096 revolutions. Unlike incremental encoders, absolute encoders will retain correct position even if power fails without homing at startup.
Absolute Encoder,Through Hollow Encoder,Absolute Encoder 13 Bit,14 Bit Optical Rotary Encoder
Jilin Lander Intelligent Technology Co., Ltd , https://www.jllandertech.com