Datasheet LTC2271 (Analog Devices) - 4

LTC2271
DYNAMIC ACCURACY The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. AIN = –1dBFS. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 1.4MHz Input 84.1 dBFS 5MHz Input l 82.3 84.1 dBFS 30MHz Input 83.8 dBFS 70MHz Input 82.7 dBFS SFDR Spurious Free Dynamic Range, 2nd Harmonic 1.4MHz Input 99 dBFS 5MHz Input l 88 98 dBFS 30MHz Input 98 dBFS 70MHz Input 90 dBFS Spurious Free Dynamic Range, 3rd Harmonic 1.4MHz Input 99 dBFS 5MHz Input l 88 98 dBFS 30MHz Input 98 dBFS 70MHz Input 96 dBFS Spurious Free Dynamic Range, 4th Harmonic or Higher 1.4MHz Input 110 dBFS 5MHz Input l 93 110 dBFS 30MHz Input 105 dBFS 70MHz Input 100 dBFS S/(N+D) Signal-to-Noise Plus Distortion Ratio 1.4MHz Input 83.9 dBFS 5MHz Input l 81.8 83.9 dBFS 30MHz Input 83.7 dBFS 70MHz Input 82.0 dBFS Crosstalk 10MHz Input –110 dBc
INTERNAL REFERENCE CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Note 5) PARAMETER CONDITIONS MIN TYP MAX UNITS
VCM Output Voltage IOUT = 0 l 0.5 • VDD – 25mV 0.5 • VDD 0.5 • VDD + 25mV V VCM Output Temperature Drift ±25 ppm/°C VCM Output Resistance –600μA < IOUT < 1mA 4 Ω VREF Output Voltage IOUT = 0 l 1.230 1.250 1.270 V VREF Output Temperature Drift ±25 ppm/°C VREF Output Resistance –400μA < IOUT < 1mA 7 Ω VREF Line Regulation 1.7V < VDD < 1.9V 0.6 mV/V
DIGITAL INPUTS AND OUTPUTS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ENCODE INPUTS (ENC+, ENC–) Differential Encode Mode (ENC– Not Tied to GND)
VID Differential Input Voltage (Note 8) l 0.2 V VICM Common Mode Input Voltage Internally Set 1.2 V Externally Set (Note 8) l 1.1 1.6 V VIN Input Voltage Range ENC+, ENC– to GND (Note 8) l 0.2 3.6 V RIN Input Resistance See Figure 10 10 kΩ CIN Input Capacitance (Note 8) 3.5 pF 2271f 4