Datasheet LTC2471, LTC2473 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Selectable 208sps/833sps, 16-Bit I2C ΔΣ ADCs with 10ppm/°C Max Precision Reference |
| Pages / Page | 20 / 1 — FeaTures. DescripTion. 16-Bit Resolution. Internal, High Accuracy … |
| File Format / Size | PDF / 496 Kb |
| Document Language | English |
FeaTures. DescripTion. 16-Bit Resolution. Internal, High Accuracy Reference—10ppm/°C (Max)
Model Line for this Datasheet
Text Version of Document
LTC2471/LTC2473 Selectable 208sps/833sps, 16-Bit I2C ΔΣ ADCs with 10ppm/°C Max Precision Reference
FeaTures DescripTion
n
16-Bit Resolution
The LTC®2471/LTC2473 are small, 16-bit analog-to-digital n
Internal, High Accuracy Reference—10ppm/°C (Max)
converters with an integrated precision reference and n
Single-Ended (LTC2471) or Differential (LTC2473)
a selectable 208sps or 833sps output rate. They use a n
Selectable 208sps/833sps Output Rate
single 2.7V to 5.5V supply and communicate through an n
1mV Offset Error
I2C Interface. The LTC2471 is single-ended with a 0V to n
0.01% Gain Error
VREF input range and the LTC2473 is differential with a n Single Conversion Settling Time Simplifies ±VREF input range. Both ADCs include a 1.25V integrated Multiplexed Applications reference with 2ppm/°C drift performance and 0.1% initial n Single-Cycle Operation with Auto Shutdown accuracy. The converters are available in a 12-pin DFN n 3.5mA (Typ) Supply Current 3mm × 3mm package or an MSOP-12 package. They n 2µA (Max) Sleep Current include an integrated oscillator and perform conversions n Internal Oscillator—No External Components with no latency for multiplexed applications. The LTC2471/ Required LTC2473 include a proprietary input sampling scheme n I2C Interface that reduces the average input current several orders of n Small 12-Lead, 3mm × 3mm DFN and MSOP magnitude when compared to conventional delta sigma Packages converters.
applicaTions
Following a single conversion, the LTC2471/LTC2473 automatically power down the converter and can also be n System Monitoring configured to power down the reference. When both the n Environmental Monitoring ADC and reference are powered down, the supply current n Direct Temperature Measurements is reduced to 200nA. n Instrumentation n The LTC2471/LTC2473 include a user selectable 208sps Industrial Process Control n or 833sps output rate and due to a large oversampling Data Acquisition n ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed Embedded ADC Upgrades anti-aliasing requirements. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation and Easy Drive and No Latency ∆∑ is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6208279, 6411242, 7088280, 7164378.
Typical applicaTion VREF vs Temperature
1.2520 2.7V TO 5.5V 1.2515 0.1µF 0.1µF 0.1µF 10µF 1.2510 TAGE (V) 0.1µF REFOUT COMP V 1.2505 CC IN+ SCL I2C 1.2500 10k 10k INTERFACE LTC2473 SDA 1.2495 IN– 0.1µF 1.2490 10k R REF– AO GND REFERENCE OUTPUT VOL 1.2485 24713 TA01a 1.2480–50 –30 –10 10 30 50 70 90 TEMPERATURE (°C) 24713 TA01b 24713fb For more information www.linear.com/LTC2471 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Analog Inputs Power Requirements I2C Inputs and Outputs I2C Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts
FeaTures DescripTion
n
16-Bit Resolution
The LTC®2471/LTC2473 are small, 16-bit analog-to-digital n
Internal, High Accuracy Reference—10ppm/°C (Max)
converters with an integrated precision reference and n
Single-Ended (LTC2471) or Differential (LTC2473)
a selectable 208sps or 833sps output rate. They use a n
Selectable 208sps/833sps Output Rate
single 2.7V to 5.5V supply and communicate through an n
1mV Offset Error
I2C Interface. The LTC2471 is single-ended with a 0V to n
0.01% Gain Error
VREF input range and the LTC2473 is differential with a n Single Conversion Settling Time Simplifies ±VREF input range. Both ADCs include a 1.25V integrated Multiplexed Applications reference with 2ppm/°C drift performance and 0.1% initial n Single-Cycle Operation with Auto Shutdown accuracy. The converters are available in a 12-pin DFN n 3.5mA (Typ) Supply Current 3mm × 3mm package or an MSOP-12 package. They n 2µA (Max) Sleep Current include an integrated oscillator and perform conversions n Internal Oscillator—No External Components with no latency for multiplexed applications. The LTC2471/ Required LTC2473 include a proprietary input sampling scheme n I2C Interface that reduces the average input current several orders of n Small 12-Lead, 3mm × 3mm DFN and MSOP magnitude when compared to conventional delta sigma Packages converters.
applicaTions
Following a single conversion, the LTC2471/LTC2473 automatically power down the converter and can also be n System Monitoring configured to power down the reference. When both the n Environmental Monitoring ADC and reference are powered down, the supply current n Direct Temperature Measurements is reduced to 200nA. n Instrumentation n The LTC2471/LTC2473 include a user selectable 208sps Industrial Process Control n or 833sps output rate and due to a large oversampling Data Acquisition n ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed Embedded ADC Upgrades anti-aliasing requirements. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation and Easy Drive and No Latency ∆∑ is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6208279, 6411242, 7088280, 7164378.
Typical applicaTion VREF vs Temperature
1.2520 2.7V TO 5.5V 1.2515 0.1µF 0.1µF 0.1µF 10µF 1.2510 TAGE (V) 0.1µF REFOUT COMP V 1.2505 CC IN+ SCL I2C 1.2500 10k 10k INTERFACE LTC2473 SDA 1.2495 IN– 0.1µF 1.2490 10k R REF– AO GND REFERENCE OUTPUT VOL 1.2485 24713 TA01a 1.2480–50 –30 –10 10 30 50 70 90 TEMPERATURE (°C) 24713 TA01b 24713fb For more information www.linear.com/LTC2471 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Analog Inputs Power Requirements I2C Inputs and Outputs I2C Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Revision History Typical Application Related Parts
