Datasheet

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34951A 4-channel isolated D/A converter with waveform 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. 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-to-point arbitrary waveform generator at up to 200k
points/sec. You can use the standard since, square or ramp wave shapes provided or define your own
wave shape using over 500k points and output to a device under test. There is also a single CLK that can
be divided down for each channel independently. 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.
34951A 4 channel D/A
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 = 500µV
Amplitude accuracy
± (0.05% + 3.0 mV) (90 days, Tcal ± 5°C or Cal:MOD?: ± 5°C)
Ripple and noise
< 2 mVrms, 20 Hz to 250 kHz into 10 kΩ load
Settling time
40 µS (-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
± (0.09% + 5.0 μA) (90 days, Tcal ± 5°C or Cal:MOD?: ± 5°C)
Ripple and noise
< 2 μArms, 20 Hz to 250 kHz into 250 Ω
Compliance voltage
± 12 V
Maximum open circuit voltage
< ± 22 V
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 into 1 kΩ (3.3 V logic
Input impedance
50 Ω typical
Maximum rate
10 MHz
Clock output
Level
TTL compatible into 1 kΩ (3.3 V logic
Output impedance
50 Ω typical
Maximum rate
10 MHz
Accuracy
± 100 ppm