16-Bit, Single-Supply LED Current Driver with Less than ±1 LSB Integral and Differential Nonlinearity
使用 Analog Devices 的 AD5542A 的参考设计
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依据最终产品
- Diagnostics, Monitoring and Therapy
- Health Wellness & Fitness
- Instrumentation and Measurement
- Portable Medical Instrumentation
- Unmanned Systems
说明
- Application Circuit is a complete single-supply, low noise LED current source driver controlled by a 16-bit digital-to-analog converter (DAC). The system maintains ±1 LSB integral and differential nonlinearity and has a 0.1 Hz to 10 Hz noise of less than 45 nA p-p for a full-scale output current of 20 mA. The innovative output driver amplifier eliminates the crossover nonlinearity normally associated with most rail-to-rail input op amps that can be as high as 4 LSBs or 5 LSBs for a 16-bit system. This industry-leading solution is ideal for pulse oximetry applications where 1/f noise superimposed on the LED brightness levels affects the overall accuracy of the measurement. Total power dissipation for the three active devices is less than 20 mW typical when operating on a single 5V supply
主要特色
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Output Current0.02 A
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Number of Derived Elements1
Featured Parts (23)
| 零件编号 | 供应商 | 类别 | 说明 | |||
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ADA4500-2ACPZ-RL | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Dual Low Power Amplifier R-R I/O ±2.75V/5.5V 8-Pin LFCSP EP T/R | 买入 | |
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ADA4500-2ARMZ-RL | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Dual Low Power Amplifier R-R I/O ±2.75V/5.5V 8-Pin MSOP T/R | 买入 | |
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ADA4500-2ARMZ | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Dual Low Power Amplifier R-R I/O ±2.75V/5.5V 8-Pin MSOP Tube | 买入 | |
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ADR4525ARZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R | 买入 | |
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ADA4500-2ARMZ-R7 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Dual Low Power Amplifier R-R I/O ±2.75V/5.5V 8-Pin MSOP T/R | 买入 | |
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ADR4525DEZ | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin CLLCC Tray | 买入 | |
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ADR4525CRZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R | 买入 | |
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ADR4525CRZ | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N Tube | 买入 | |
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ADR4525BRZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R | 买入 | |
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ADR4525ARZ | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N Tube | 买入 | |
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ADA4500-2ACPZ-R7 | Analog Devices | Operational Amplifiers - Op Amps | Op Amp Dual Low Power Amplifier R-R I/O ±2.75V/5.5V 8-Pin LFCSP EP T/R | 买入 | |
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ADR4525WBRZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R Automotive AEC-Q100 | 买入 | |