22 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
34951A 4-channel isolated
D/A converter with
waveform memory
DC voltage
Phase-locking I/O trigger characteristics
Trigger input
Amplitude:
Resolution:
± 16 V up to 10 mA
16-bits = 500 μV
Input level:
TTL compatible
(3.3 V logic,
Amplitude
accuracy (DC):
This module has four independent, isolat-
ed channels that output DC voltage up to
± 16 V or DC current up to ± 20 mA. The
gain and offset can be adjusted on-the-ꢀy.
Each channel can be controlled manually,
or use the onboard memory to download
a waveform. The 500k of memory is global
and can store up to 32 waveforms. Any
waveform can be dynamically allocated
among one or more channels and output
as a point-topoint arbitrary waveform
generator at up to 200k points/sec. You
can use the standard sine, square or ramp
wave shapes provided or deꢁne your own
wave shape using over 500,000 points and
output to a device under test. There is also
a single CLK that can be divided down for
each channel independently.
5 V tolerant)
± (0.05% + 3.0 mV)
(90 days, Tcal ± 5°C or
Cal:MOD?: ± 5°C)
Slope:
Rising or falling, selectable
> 100 nS
Pulse width:
Ripple and noise:
Settling time:
< 2 mVrms, 20 Hz to
250 kHz into 10 kΩ load
Input
> 10 kΩ, DC coupled
impedance:
40 uS (-full scale to +full
scale step, single chan-
nel, to rated accuracy)
Trigger output
Level:
TTL compatible into
1 kΩ (3.3 V logic)
Output impedance: < 1 Ω with the load
Output
50 Ω typical
sensed
impedance:
DC current
Clock input
Range:
± 20 mA
Input level:
TTL compatible
Resolution:
Accuracy:
16-bit = 630 nA
(3.3 V logic, 5 V tolerant)
± (0.09% + 5.0 μV)
(90 days, Tcal ± 5°C or
Cal:MOD?: ± 5°C)
Input
> 10 kΩ, DC
impedance:
Maximum
rate:
10 MHz
Ripple and noise:
< 2 μArms, 20 Hz to
250 kHz into 250 Ω
The calibration command connects the
D/A converters to the internal DMM to be
automatically calibrated. Connections to
the module can be made via standard
50-pin Dsub cables or a detachable
terminal block.
Clock output
Compliance
voltage:
± 12 V
Level:
TTL compatible into
1k Ω (3.3 V logic)
Max open circuit
voltage:
< ± 22 V
Output
50 Ω typical
impedance:
Maximum
rate:
10 MHz
General speciꢀcations
Maximum update rate: 200 kHz point-to-
point
Accuracy:
± 100 ppm
Monotonic:
Isolation:
to 16-bits
> 80 VDC/AC peak
(chan-to-chassis or
chan-to-chan)
Synchronization:
Software commands
or external trigger
Internal/external CLK
accuracy:
100 ppm
AC accuracy:
Not speciꢀed
Figure 14. 34951A 4-channel isolated D/A converter
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