NI 5782R User Manual and Specifications
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© National Instruments
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17
Analog Input (AI 0 and AI 1)
General Characteristics
Number of channels.......................................... Two, single-ended, simultaneously sampled
Connector.......................................................... SMA
Input impedance ............................................... 50
Ω
, per connector
Sample rate
Internal Sample Clock .............................. 250 MHz
External Sample Clock ............................. 175 MHz to 250 MHz
ADC part number ............................................. ADS62P49
1
; 14-bit resolution, dual ADC
AC-Coupled Specifications
Input range (normal operating conditions) ....... +10.2 dBm (2.05 V
pk-pk
)
Absolute maximum input ................................. 50
Ω
,
±10 V DC, +18 dBm (5 V
pk-pk
) AC
Bandwidth (-1 dB) ............................................ 1 MHz to 250 MHz
Bandwidth (-3 dB) ............................................ 0.1 MHz to 500 MHz
Table 5 lists the AC-coupled spectral performance measurements. All values are measured with
a 500 MHz internal Sample Clock.
Channel-to-channel isolation
1 MHz ....................................................... >90 dB
100.1 MHz ................................................ 90 dB
501 MHz ................................................... 70 dB
1
For additional information on the ADS62P49, refer to the Texas Instruments device data sheet at
www.ti.com
.
Table 5.
Analog Input AC-Coupled Spectral Performance
Measurement
20.1 MHz
70.1 MHz
124.1 MHz
Signal-to-noise
ratio (SNR)
70.5 dB
70.0 dB
68.8 dB
Signal-to-noise and
distortion ratio
(SINAD)
70.5 dB
69.8 dB
68.6 dB
Spurious-free
dynamic range
(SFDR)
90.0 dB
83.0 dB
80.0 dB
