Datasheet LTC1274, LTC1277 (Analog Devices) - 3

LTC1274/LTC1277
U U A ALOG I PUT (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Analog Input Range (Note 10) 4.75V ≤ VDD ≤ 5.25V (Unipolar) ● 0 to 4.096 V 4.75V ≤ VDD ≤ 5.25V, – 5.25V ≤ VSS ≤ – 2.45V (Bipolar) ● ±2.048 V IIN Analog Input Leakage Current CS = High ● ±1 µA CIN Analog Input Capacitance Between Conversions (Sample Mode) 45 pF During Conversions (Hold Mode) 5 pF
U W DY A IC ACCURACY (Notes 5, 9) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise 50kHz Input Signal 73 dB Plus Distortion Ratio 100kHz Input Signal ● 70 72.5 dB THD Total Harmonic Distortion 50kHz Input Signal – 84 dB Up to 5th Harmonic 100kHz Input Signal ● – 82 – 76 dB Peak Harmonic or 50kHz Input Signal – 84 dB Spurious Noise 100kHz Input Signal ● – 82 – 76 dB IMD Intermodulation Distortion fa = 96.95kHz, fb = 97.68kHz 2nd Order Terms – 78 dB 3rd Order Terms – 81 dB Full Power Bandwidth 2 MHz Full Linear Bandwidth 350 kHz [S/(N + D) ≥ 68dB]
U U U I TER AL REFERE CE CHARACTERISTICS (Note 5) PARAMETER CONDITIONS MIN TYP MAX UNITS
VREF Output Voltage IOUT = 0 2.400 2.420 2.440 V VREF Output Tempco IOUT = 0 ● ±10 ±45 ppm/°C VREF Line Regulation 4.75V ≤ VDD ≤ 5.25V 0.01 LSB/V – 5.25V ≤ VSS ≤ – 4.75V 0.01 LSB/V VREF Load Regulation – 5mA ≤ IOUT ≤ 70µA 2 LSB/mA
U U (Note 5) DIGITAL I PUTS A D DIGITAL OUTPUTS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIH High Level Input Voltage VDD = 5.25V ● 2.4 V VIL Low Level Input Voltage VDD = 4.75V ● 0.8 V IIN Digital Input Current VIN = 0V to VDD ● ±10 µA CIN Digital Input Capacitance 5 pF VOH High Level Output Voltage, All Logic Outputs VDD = 4.75V IO = – 10µA 4.70 V IO = – 200µA ● 4.0 V VLOGIC = 2.7V (LTC1277) IO = – 10µA 2.65 V IO = – 200µA 2.60 V VOL Low Level Output Voltage, VDD = 4.75V All Logic Outputs IO = 160µA 0.05 V IO = 1.6mA ● 0.10 0.4 V VLOGIC =2.7V (LTC1277) IO = 160µA 0.05 V IO = 1.6mA 0.10 V 3