34951A 4-channel isolated
D/A converter with wave-
form memory
This module has four independent,
isolated 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-fly. Each channel
can be controlled manually, or use
the onboard memory to download a
waveform. These waveforms can be
dynamically allocated among one or
more channels and output as a point-
to-point arbitrary waveform generator
at up to 200k points/sec. You can use
the standard sine, square or ramp
wave shapes provided or define your
own wave shape using over 500,000
points and output to a device under
test.
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.
General specifications
Maximum update
rate: 200 kHz point-to-point
Monotonic : to 16-bits
Isolation: > 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 specified
DC voltage
Amplitude: ± 16 V up to 10 mA
Resolution: 16-bits = 500 uV
Amplitude
accuracy (DC): ± (0.05% + 3.0 mV
(90 days, Tcal ± 5°C or
*Cal? ± 5°C)
Ripple and noise: < 2 mVrms, 20 Hz to
250 kHz into 10 kΩ load
Settling time: 40 uS (-full scale to +full
scale step, single channel,
to rated accuracy)
Output impedance: < 1 Ω with the load
sensed
DC current
Range: ± 20 mA
Resolution: 16-bit = 630 nA
Accuracy: ± (% value + amps)
(temperature within ± 5°C
of Tcal or *Cal?) 90-day:
± (0.09% + 5.0 uA)
Ripple and noise: < 2 uArms, 20 Hz to
250 kHz into 250 Ω
Compliance voltage: ± 12 V
Max open circuit
voltage: < ± 22 V
Phase-locking I/O trigger characteristics
Trigger input
Input level: TTL compatible
(3.3 V logic, 5 V tolerant)
Slope: Rising or falling,
selectable
Pulse width: > 100 nS
Input impedance: > 10 kΩ, DC coupled
Trigger output
Level: TTL compatible
into 1 kΩ (3.3 V logic)
Output impedance: 50 Ω typical
Clock input
Input level: TTL compatible
(3.3 V logic, 5 V tolerant)
Input impedance: > 10 kΩ, DC
Maximum rate: 10 MHz
Clock output
Level: TTL compatible
into 1k Ω (3.3 V logic)
Output impedance: 50 Ω typical
Maximum rate: 10 MHz
Accuracy: ± 100 ppm
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