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NI 5421 Specifications 4 ni.com
Maximum Output Voltage
Maximum
Output
Vo l t a g e
Path Load Maximum Output Voltage (V
pk-pk
) The Maximum
Output Voltage
of the NI 5421 is
determined by
the Amplitude
Range and the
Offset Range.
Direct 50 Ω ±0.500
1 kΩ ±0.953
Open ±1.000
Low-
Gain
Amplifier
50 Ω ±1.000
1 kΩ ±1.905
Open ±2.000
High-
Gain
Amplifier
50 Ω ±6.000
1 kΩ ±11.43
Open ±12.00
Accuracy
DC Accuracy For the Low-Gain or High-Gain Amplifier Path:
±0.2% of Amplitude ± 0.05% of Offset ±500 µV
(within ±10 °C of self-calibration temperature)
±0.4% of Amplitude ± 0.05% of Offset ±1 mV
(0 °C to 55 °C)
All paths are
calibrated for
amplitude and
gain errors. The
Low-Gain and
High-Gain
Amplifier Paths
also are
calibrated for
offset errors.
Specifications
valid only for
high impedance.
For the Direct Path:
Gain Accuracy: ±0.2% (within ±10 °C of self-calibration
temperature)
Gain Accuracy: ±0.4% (0 °C to 55 °C)
DC Offset Error: ±30 mV (0 °C to 55 °C)
AC Amplitude
Accuracy
±1.0% of Amplitude ±1 mV 50 kHz sine
wave.
Output Characteristics
Output
Impedance
50 Ω nominal or 75 Ω nominal, software-selectable. —
Load
Impedance
Compensation
Output amplitude is compensated for user-specified load
impedances.
—
Table 1. (Continued)
Specification Value Comments