Datasheet LTC2269 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 16-Bit, 20Msps Low Noise ADC |
| Pages / Page | 32 / 5 — DYNAMIC ACCURACY. The. denotes the specifications which apply over the … |
| File Format / Size | PDF / 775 Kb |
| Document Language | English |
DYNAMIC ACCURACY. The. denotes the specifications which apply over the full operating temperature range,
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Text Version of Document
LTC2269
DYNAMIC ACCURACY The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SFDR Spurious Free Dynamic Range 1.4MHz Input 99 dBFS 3rd Harmonic 5MHz Input l 92 98 dBFS 30MHz Input 98 dBFS 70MHz Input 96 dBFS SFDR Spurious Free Dynamic Range 1.4MHz Input 110 dBFS 4th Harmonic or Higher 5MHz Input l 95 110 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 81.7 83.9 dBFS 30MHz Input 83.7 dBFS 70MHz Input 82 dBFS
INTERNAL REFERENCE CHARACTERISTICS 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
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 specifications which apply over the full operating temperature range, otherwise specifications 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 l 0.2 3.6 V RIN Input Resistance (See Figure 10) 10 kΩ CIN Input Capacitance (Note 8) 3.5 pF
SINGLE-ENDED ENCODE MODE (ENC– TIED TO GND)
VIH High Level Input Voltage VDD = 1.8V l 1.2 V VIL Low Level Input Voltage VDD = 1.8V l 0.6 V VIN Input Voltage Range ENC+ to GND l 0 3.6 V RIN Input Resistance (See Figure 11) 30 kΩ CIN Input Capacitance (Note 8) 3.5 pF 2269f 5
DYNAMIC ACCURACY The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SFDR Spurious Free Dynamic Range 1.4MHz Input 99 dBFS 3rd Harmonic 5MHz Input l 92 98 dBFS 30MHz Input 98 dBFS 70MHz Input 96 dBFS SFDR Spurious Free Dynamic Range 1.4MHz Input 110 dBFS 4th Harmonic or Higher 5MHz Input l 95 110 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 81.7 83.9 dBFS 30MHz Input 83.7 dBFS 70MHz Input 82 dBFS
INTERNAL REFERENCE CHARACTERISTICS 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
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 specifications which apply over the full operating temperature range, otherwise specifications 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 l 0.2 3.6 V RIN Input Resistance (See Figure 10) 10 kΩ CIN Input Capacitance (Note 8) 3.5 pF
SINGLE-ENDED ENCODE MODE (ENC– TIED TO GND)
VIH High Level Input Voltage VDD = 1.8V l 1.2 V VIL Low Level Input Voltage VDD = 1.8V l 0.6 V VIN Input Voltage Range ENC+ to GND l 0 3.6 V RIN Input Resistance (See Figure 11) 30 kΩ CIN Input Capacitance (Note 8) 3.5 pF 2269f 5
