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LTC1273BCSW Datasheet(PDF) 8 Page - Linear Technology |
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LTC1273BCSW Datasheet(HTML) 8 Page - Linear Technology |
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8 / 24 page  8 LTC1273 LTC1275/LTC1276 127356fa CC HARA TERISTICS A TYPICALPERFOR CE PI FU CTIO S AIN (Pin 1): Analog Input. 0V to 5V (LTC1273), ±2.5V (LTC1275) or ±5V (LTC1276). VREF (Pin 2): +2.42V Reference Output. Bypass to AGND (10 µF tantalum in parallel with 0.1µF ceramic). AGND (Pin 3): Analog Ground. D11-D4 (Pins 4 to 11): Three-State Data Outputs. DGND (Pin 12): Digital Ground. D3/11-D0/8 (Pins 13 to 16): Three-State Data Outputs. NC (Pins 17 and 18): No Connection. HBEN (Pin 19): High Byte Enable Input. This pin is used to multiplex the internal 12-bit conversion result into the lower bit outputs (D7-D0/8). See Table 1. HBEN also disables conversion start when HIGH. RD (Pin 20): READ Input. This active low signal starts a conversion when CS and HBEN are low. RD also enables the output drivers when CS is low. CS (Pin 21): The CHIP SELECT Input must be low for the ADC to recognize RD and HBEN inputs. BUSY (Pin 22): The BUSY Output shows the converter status. It is low when a conversion is in progress. S/(N + D) vs Input Frequency and Amplitude Acquisition Time vs Source Impedance Intermodulation Distortion Plot RSOURCE (Ω) 10 2500 3000 3500 4000 4500 100 1k 10k LTC1273/75/76 • TPC10 2000 1500 500 0 1000 INPUT FREQUENCY (Hz) 20 40 50 70 80 10k 100k 10M LTC1273/75/76 • TPC11 0 1k 60 30 10 1M VIN = –60dB VIN = –20dB VIN = 0dB fSAMPLE = 300kHz Spurious Free Dynamic Range vs Input Frequency Reference Voltage vs Load Current LOAD CURRENT (mA) –5 2.405 2.410 2.415 2.420 2.425 2.430 2.435 – 4 –2 –1 2 LTC1273/75/76 • TPC13 –3 0 1 INPUT FREQUENCY (Hz) 10k –60 –50 –40 –30 –20 100k 1M 10M LTC1273/75/76 • TPC12 –70 –80 –90 –100 –10 0 fSAMPLE = 300kHz FREQUENCY (kHz) 0 –120 –100 –80 –60 –40 40 80 120 160 LTC1273/75/76 • F05 –20 0 20 60 100 140 fSAMPLE = 300kHz fIN1 = 29.37kHz fIN2 = 32.446kHz |
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