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Data Converters 
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Analog-to-Digital Converters
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MAX1285B
400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference
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The MAX1284/MAX1285 12-bit analog-to-digital converters (ADCs) combine a high-bandwidth track/hold (T/H), a serial interface with high conversion speed, an internal +2.5V reference, and low power consumption. The MAX1284 operates from a single +4.5V to +5.5V supply; the MAX1285 operates from a single +2.7V to +3.6V supply.
The 3-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The devices use an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
Low power, ease of use, and small package size make these converters ideal for remote-sensor and data-acquisition applications or for other circuits with demanding power consumption and space requirements. The MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed versions of the MAX1240/MAX1241; for more information, refer to the respective data sheets.
The 3-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The devices use an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
Low power, ease of use, and small package size make these converters ideal for remote-sensor and data-acquisition applications or for other circuits with demanding power consumption and space requirements. The MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed versions of the MAX1240/MAX1241; for more information, refer to the respective data sheets.
Key Features
- Single-Supply Operation
- +4.5V to +5.5V (MAX1284)
- +2.7V to +3.6V (MAX1285)
- ±1 LSB (max) DNL, ±1 LSB (max) INL
- 400ksps Sampling Rate (MAX1284)
- Internal Track/Hold
- Internal +2.5V Reference
- Low Power: 2.5mA (400ksps)
- SPI/QSPI/MICROWIRE 3-Wire Serial Interface
- Pin-Compatible, High-Speed Upgrades to MAX1240/MAX1241
- 8-Pin SO Package
Applications/Uses
- Battery-Powered Applications
- Data Acquisition
- Medical Instruments
- Pen Digitizers
- Portable Data Logging
- Process Control
Parametric specs for Precision ADCs (< 5Msps)
| Resolution (bits) (ADC) | 12 |
| # Input Channels | 1 |
| Conv. Rate (ksps) (max) | 300 |
| Data Bus | SPI |
| ADC Architecture | SAR |
| Diff/S.E. Input | S.E. Only |
| Internal VREF (V) (nominal) | 2.5 |
| Unipolar VIN (V) (max) | 2.5 |
| INL (±LSB) | 1 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | $9.25 @1k |
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Technical Docs
| Data Sheet | 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference | Jan 18, 2011 |
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Parameters
Parametric specs for Precision ADCs (<u><</u> 5Msps)
| Resolution (bits) (ADC) | 12 |
| # Input Channels | 1 |
| Conv. Rate (ksps) (max) | 300 |
| Data Bus | SPI |
| ADC Architecture | SAR |
| Diff/S.E. Input | S.E. Only |
| Internal VREF (V) (nominal) | 2.5 |
| Unipolar VIN (V) (max) | 2.5 |
| INL (±LSB) | 1 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | $9.25 @1k |
Key Features
- Single-Supply Operation
- +4.5V to +5.5V (MAX1284)
- +2.7V to +3.6V (MAX1285)
- ±1 LSB (max) DNL, ±1 LSB (max) INL
- 400ksps Sampling Rate (MAX1284)
- Internal Track/Hold
- Internal +2.5V Reference
- Low Power: 2.5mA (400ksps)
- SPI/QSPI/MICROWIRE 3-Wire Serial Interface
- Pin-Compatible, High-Speed Upgrades to MAX1240/MAX1241
- 8-Pin SO Package
Applications/Uses
- Battery-Powered Applications
- Data Acquisition
- Medical Instruments
- Pen Digitizers
- Portable Data Logging
- Process Control
Description
The MAX1284/MAX1285 12-bit analog-to-digital converters (ADCs) combine a high-bandwidth track/hold (T/H), a serial interface with high conversion speed, an internal +2.5V reference, and low power consumption. The MAX1284 operates from a single +4.5V to +5.5V supply; the MAX1285 operates from a single +2.7V to +3.6V supply.
The 3-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The devices use an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
Low power, ease of use, and small package size make these converters ideal for remote-sensor and data-acquisition applications or for other circuits with demanding power consumption and space requirements. The MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed versions of the MAX1240/MAX1241; for more information, refer to the respective data sheets.
The 3-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The devices use an external serial-interface clock to perform successive-approximation analog-to-digital conversions.
Low power, ease of use, and small package size make these converters ideal for remote-sensor and data-acquisition applications or for other circuits with demanding power consumption and space requirements. The MAX1284/MAX1285 are available in 8-pin SO packages.
These devices are pin-compatible, higher-speed versions of the MAX1240/MAX1241; for more information, refer to the respective data sheets.
Technical Docs
| Data Sheet | 400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference | Jan 18, 2011 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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