Datasheet LTC1854, LTC1855, LTC1856 (Analog Devices) - 3

LTC1854/LTC1855/LTC1856
analog inpuT The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) PARAMETER CONDITIONS MIN TYP MAX UNITS
Analog Input Range CH0 to CH7, COM ±10 V ADC+, ADC– (Note 3) ADC– ±2.048 V Impedance CH0 to CH7, COM 31 kΩ MUXOUT+, MUXOUT– 5 kΩ Capacitance CH0 to CH7, COM 5 pF Sample Mode ADC+, ADC– 12 pF Hold Mode ADC+, ADC– 4 pF Input Leakage Current ADC+, ADC–, CONVST = Low l ±1 µA
Dynamic accuracy The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. MUXOUT connected to ADC inputs. (Note 5) LTC1854 LTC1855 LTC1856 SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
S/(N + D) Signal-to-(Noise + Distortion) Ratio 1kHz Input Signal 74 83 87 dB THD Total Harmonic Distortion 1kHz Input Signal –102 –95 –101 dB First Five Harmonics Peak Harmonic or Spurious Noise 1kHz Input Signal –99 –99 –103 dB Channel-to-Channel Isolation 1kHz Input Signal –120 –120 –120 dB –3dB Input Bandwidth 1 1 1 MHz Aperture Delay –70 –70 –70 ns Aperture Jitter 60 60 60 ps Transient Response Full-Scale Step 4 4 4 µs (Note 9) Overvoltage Recovery (Note 12) 150 150 150 ns 1854565af 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Applications Information Package Description Typical Application Related Parts