Datasheet LTC1401 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | Complete SO-8, 12-Bit, 200ksps ADC with Shutdown |
| 页数 / 页 | 20 / 1 — FEATURES. DESCRIPTIO. Complete 12-Bit ADC with Reference in SO-8. Single … |
| 文件格式/大小 | PDF / 254 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTIO. Complete 12-Bit ADC with Reference in SO-8. Single Supply 3V Operation. Sample Rate: 200ksps. APPLICATIO S
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LTC1401 Complete SO-8, 12-Bit, 200ksps ADC with Shutdown
U FEATURES DESCRIPTIO
■
Complete 12-Bit ADC with Reference in SO-8
The LTC ®1401 is a complete 200ksps, 12-bit A/D con- ■
Single Supply 3V Operation
verter that converts 0V to 2.048V unipolar input and draws ■
Sample Rate: 200ksps
only 15mW from a single 3V supply. This easy-to-use ■ Power Dissipation: 15mW (Typ) device comes complete with a 315ns sample-and-hold ■ 68dB S/(N + D) and – 72dB THD at 50kHz and a precision reference. Maximum DC specifications ■ No Missing Codes Over Temperature include ±1LSB INL, ±1LSB DNL and 45ppm/°C full-scale ■ Nap Mode with Instant Wake-Up: 1.5mW drift over temperature. ■ Sleep Mode: 19.5µW The LTC1401 has three power saving modes: Nap and ■ Shutdown Mode: 13.5µW Sleep, through the serial interface and Shutdown by ■ High Impedance Analog Input setting the SHDN pin to zero. In Nap mode, it consumes ■ Input Range (0.5mV/LSB): 0V to 2.048V only 1.5mW of power and can wake up and convert ■ Internal Reference Can Be Overdriven Externally immediately. In Sleep (Shutdown) mode, it consumes ■ 3-Wire Interface to DSPs and Processors (SPI and 19.5µW (13.5µW) of power typically. Upon power-up MICROWIRETM Compatible)
U
from Sleep or Shutdown mode, a reference ready (REFRDY)
APPLICATIO S
signal is available in the serial word to indicate that the reference has settled and the chip is ready to convert. ■ Low Power and Battery-Operated Systems The 3-wire serial port allows compact and efficient data ■ Handheld or Portable Instruments transfer to a wide range of microprocessors, microcon- ■ High Speed Data Acquisition trollers and DSPs. ■ Digital Signal Processing ■ Multiplexed Data Acquisition Systems , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ■ Telecommunication ■ Digital Radio ■ Spectrum Analysis
U TYPICAL APPLICATIO Power Consumption vs Sample Rate
100
Single 3V Supply, 200kHz, 12-Bit Sampling A/D Converter
3.2MHz CLOCK TA = 25°C 10 NORMAL CONVERSION 3V NAP MODE 1 V BETWEEN CONVERSION CC SHDN + 10µF 0.1µF LTC1401 MPU 0.1 ANALOG INPUT AIN CONV P1.4 (0V TO 2.048V) SUPPLY CURRENT (mA) SHUTDOWN MODE BETWEEN CONVERSION 1.20V V 0.01 REF CLK P1.3 + SLEEP MODE BETWEEN 10µF 0.1µF GND DOUT P1.2 CONVERSION SERIAL 0.001 1401 TA01 DATA LINK 0.01 0.1 1 10 100 1k 10k 100k 1M SAMPLE RATE (Hz) LTC1401 • TA02 1401fa 1
U FEATURES DESCRIPTIO
■
Complete 12-Bit ADC with Reference in SO-8
The LTC ®1401 is a complete 200ksps, 12-bit A/D con- ■
Single Supply 3V Operation
verter that converts 0V to 2.048V unipolar input and draws ■
Sample Rate: 200ksps
only 15mW from a single 3V supply. This easy-to-use ■ Power Dissipation: 15mW (Typ) device comes complete with a 315ns sample-and-hold ■ 68dB S/(N + D) and – 72dB THD at 50kHz and a precision reference. Maximum DC specifications ■ No Missing Codes Over Temperature include ±1LSB INL, ±1LSB DNL and 45ppm/°C full-scale ■ Nap Mode with Instant Wake-Up: 1.5mW drift over temperature. ■ Sleep Mode: 19.5µW The LTC1401 has three power saving modes: Nap and ■ Shutdown Mode: 13.5µW Sleep, through the serial interface and Shutdown by ■ High Impedance Analog Input setting the SHDN pin to zero. In Nap mode, it consumes ■ Input Range (0.5mV/LSB): 0V to 2.048V only 1.5mW of power and can wake up and convert ■ Internal Reference Can Be Overdriven Externally immediately. In Sleep (Shutdown) mode, it consumes ■ 3-Wire Interface to DSPs and Processors (SPI and 19.5µW (13.5µW) of power typically. Upon power-up MICROWIRETM Compatible)
U
from Sleep or Shutdown mode, a reference ready (REFRDY)
APPLICATIO S
signal is available in the serial word to indicate that the reference has settled and the chip is ready to convert. ■ Low Power and Battery-Operated Systems The 3-wire serial port allows compact and efficient data ■ Handheld or Portable Instruments transfer to a wide range of microprocessors, microcon- ■ High Speed Data Acquisition trollers and DSPs. ■ Digital Signal Processing ■ Multiplexed Data Acquisition Systems , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ■ Telecommunication ■ Digital Radio ■ Spectrum Analysis
U TYPICAL APPLICATIO Power Consumption vs Sample Rate
100
Single 3V Supply, 200kHz, 12-Bit Sampling A/D Converter
3.2MHz CLOCK TA = 25°C 10 NORMAL CONVERSION 3V NAP MODE 1 V BETWEEN CONVERSION CC SHDN + 10µF 0.1µF LTC1401 MPU 0.1 ANALOG INPUT AIN CONV P1.4 (0V TO 2.048V) SUPPLY CURRENT (mA) SHUTDOWN MODE BETWEEN CONVERSION 1.20V V 0.01 REF CLK P1.3 + SLEEP MODE BETWEEN 10µF 0.1µF GND DOUT P1.2 CONVERSION SERIAL 0.001 1401 TA01 DATA LINK 0.01 0.1 1 10 100 1k 10k 100k 1M SAMPLE RATE (Hz) LTC1401 • TA02 1401fa 1