Datasheet LTC2450-1 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Easy-to-Use, Ultra-Tiny 16-Bit ΔΣ ADC |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTION. GND to V. CC Single-Ended Input Range. 60 … |
| Dateiformat / Größe | PDF / 208 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTION. GND to V. CC Single-Ended Input Range. 60 Conversions Per Second. 0.02LSB RMS Noise
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LTC2450-1 Easy-to-Use, Ultra-Tiny 16-Bit Δ∑ ADC
FEATURES DESCRIPTION
n
GND to V
The LTC®2450-1 is a low power, ultra-tiny 16-bit analog-
CC Single-Ended Input Range
n
60 Conversions Per Second
to-digital converter designed for space constrained ap- n
0.02LSB RMS Noise
plications requiring 16-bit performance. The LTC2450-1 n
16-Bits, No Missing Codes
uses a single 2.7V to 5.5V supply, accepts a single-ended n
0.5mV Offset Error
analog input voltage, and communicates through an SPI n
4LSB Full-Scale Error
interface. It includes an integrated oscillator that does n Single Conversion Settling Time for Multiplexed not require any external components. The delta-sigma Applications modulator converter core provides single-cycle settling n Single Cycle Operation with Auto Shutdown time for multiplexed applications. The converter is avail- n 350μA Supply Current able in a 6-pin, 2mm × 2mm DFN package. The LTC2450-1 n 50nA Sleep Current implements a proprietary input sampling scheme that n Internal Oscillator—No External Components reduces the average input sampling current several orders Required of magnitude. n Single Supply, 2.7V to 5.5V Operation The LTC2450-1 is capable of up to 60 conversions per n SPI Interface second and, due to the very large oversampling ratio, has n Ultra-Tiny, 2mm × 2mm DFN Package extremely relaxed antialiasing requirements. The converter
APPLICATIONS
uses its power supply voltage as the reference voltage and the single-ended, rail-to-rail input voltage range extends n System Monitoring from GND to VCC. n Environmental Monitoring Following a conversion, the LTC2450-1 can automatically n Direct Temperature Measurements enter a sleep mode and reduce its power to less than n Instrumentation 500nA. At an output rate of 1Hz, the LTC2450-1 consumes n Industrial Process Control an average of less than 25μW from a 2.7V supply. n Data Acquisition L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Easy Drive n Embedded ADC Upgrades 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 Integral Nonlinearity
3.0 VCC = VREF = 3V 2.5 2.0 2.7 TO 5.5V 1.5 0.1μF 10μF 1.0 0.5 V T CC CS 0 A = –45°C, 25°C, 90°C CLOSE TO 1k CHIP INL (LSB) –0.5 SCK 3-WIRE SPI VIN LTC2450-1 –1.0 INTERFACE SDO –1.5 SENSE 0.1μF GND –2.0 24501 TA01 –2.5 –3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 INPUT VOLTAGE (V) 24501 G02 24501fc 1
FEATURES DESCRIPTION
n
GND to V
The LTC®2450-1 is a low power, ultra-tiny 16-bit analog-
CC Single-Ended Input Range
n
60 Conversions Per Second
to-digital converter designed for space constrained ap- n
0.02LSB RMS Noise
plications requiring 16-bit performance. The LTC2450-1 n
16-Bits, No Missing Codes
uses a single 2.7V to 5.5V supply, accepts a single-ended n
0.5mV Offset Error
analog input voltage, and communicates through an SPI n
4LSB Full-Scale Error
interface. It includes an integrated oscillator that does n Single Conversion Settling Time for Multiplexed not require any external components. The delta-sigma Applications modulator converter core provides single-cycle settling n Single Cycle Operation with Auto Shutdown time for multiplexed applications. The converter is avail- n 350μA Supply Current able in a 6-pin, 2mm × 2mm DFN package. The LTC2450-1 n 50nA Sleep Current implements a proprietary input sampling scheme that n Internal Oscillator—No External Components reduces the average input sampling current several orders Required of magnitude. n Single Supply, 2.7V to 5.5V Operation The LTC2450-1 is capable of up to 60 conversions per n SPI Interface second and, due to the very large oversampling ratio, has n Ultra-Tiny, 2mm × 2mm DFN Package extremely relaxed antialiasing requirements. The converter
APPLICATIONS
uses its power supply voltage as the reference voltage and the single-ended, rail-to-rail input voltage range extends n System Monitoring from GND to VCC. n Environmental Monitoring Following a conversion, the LTC2450-1 can automatically n Direct Temperature Measurements enter a sleep mode and reduce its power to less than n Instrumentation 500nA. At an output rate of 1Hz, the LTC2450-1 consumes n Industrial Process Control an average of less than 25μW from a 2.7V supply. n Data Acquisition L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Easy Drive n Embedded ADC Upgrades 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 Integral Nonlinearity
3.0 VCC = VREF = 3V 2.5 2.0 2.7 TO 5.5V 1.5 0.1μF 10μF 1.0 0.5 V T CC CS 0 A = –45°C, 25°C, 90°C CLOSE TO 1k CHIP INL (LSB) –0.5 SCK 3-WIRE SPI VIN LTC2450-1 –1.0 INTERFACE SDO –1.5 SENSE 0.1μF GND –2.0 24501 TA01 –2.5 –3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 INPUT VOLTAGE (V) 24501 G02 24501fc 1