16-Bit, Single-Supply LED Current Driver with Less than ±1 LSB Integral and Differential Nonlinearity
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- Diagnostics, Monitoring and Therapy
- Health Wellness & Fitness
- Instrumentation and Measurement
- Portable Medical Instrumentation
- Unmanned Systems
Description
- 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
Caractéristiques principales
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Output Current0.02 A
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Number of Derived Elements1
Pièces en vedette (23)
| Pièce numéro | Fabricant | Type | Description | |||
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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 | Ajouter au panier | |
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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 | Ajouter au panier | |
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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 | Ajouter au panier | |
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ADR4525ARZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R | Ajouter au panier | |
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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 | Ajouter au panier | |
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ADR4525DEZ | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin CLLCC Tray | Ajouter au panier | |
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ADR4525CRZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R | Ajouter au panier | |
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ADR4525CRZ | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N Tube | Ajouter au panier | |
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ADR4525BRZ-R7 | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N T/R | Ajouter au panier | |
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ADR4525ARZ | Analog Devices | Voltage References | V-Ref Precision 2.5V 10mA 8-Pin SOIC N Tube | Ajouter au panier | |
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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 | Ajouter au panier | |
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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 | Ajouter au panier | |