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USB-3100 Series

Specifications – all devices except

USB-3101FS

Analog Voltage Output

D/A Converter: DAC8554

Number of Channels

USB-3101/3102/3110: 4

USB-3103/3104/3112: 8

USB-3105/3106/3114: 16

On the USB-3102/3104/3106, each DAC8554 output controls a voltage and

current output channel-pair simultaneously. Writing to voltage channel 0 also

updates current channel 0; conversely, writing to current channel 0 also updates

voltage channel 0. Disconnect unused voltage and current output channels.

Resolution: 16 bits

Output Ranges (Software-Selectable)

Calibrated: ±10 V, 0 V to 10 V

Uncalibrated: ±10.2 V, –0.04 V to 10.08 V

Output Transient

±10 V to (0 V to 10 V) or (0 V to 10 V) to ±10 V Range Selection: The output

defaults to 0 V when the output voltage range is reconfigured, the host computer

is reset, shut down, or suspended, or a reset command is issued to the device.

Duration: 5 µs typ

Amplitude: 5 V p-p typ

Host Computer is Reset, Powered On, Suspended, or a Reset Command is

Issued to Device: The duration depends on the enumeration process of the

host computer. Typically, the output is stable after two seconds.

Duration: 2 s typ

Amplitude: 2 V p-p typ

Initial Power On

Duration: 50 ms typ

Amplitude: 5 V peak typ

Differential Nonlinearity: The max specification applies to the operating tem-

perature range, and accounts for max errors due to the software calibration

algorithm (Cal mode) and DAC8554 nonlinearities

Calibrated: ±1.25 LSB typ, –2 LSB to +1 LSB max

Uncalibrated: ±0.25 LSB typ, ±1 LSB max

Output Current

VOUTx Pins

USB-3101 through USB-3106: ±3.5 mA typ

USB-3110: ±40 mA max

USB-3112/3114: ±40 mA max single channel, ±180 mA total load current

Output Short-Circuit Protection

VOUTx Connected to AGND

USB-3101 through USB-3106: Indefinite

USB-3110/3112/3114: ±100 ms max

Output Coupling: DC

Power On and Reset State

DACs Cleared to Zero-Scale: 0 V, ±50 mV typ

Output Range: 0 V to 10 V

Output Noise

0 V to 10 V Range: 14.95 µVrms typ

±10 V Range: 31.67 µVrms typ

Settling Time

To 1 LSB Accuracy: 25 µS typ

Slew Rate

USB-3101 Through USB-3106

0 V to 10 V Range: 1.20 V/µS typ

±10 V Range: 1.20 V/µS typ

USB-3110/3112/3114

0 V to 10 V Range: 2.0 V/µS typ

±10 V Range: 4.0 V/µS typ

Throughput

Single-channel: 100 Hz max, system-dependent

Multichannel: 100 Hz/#ch max, system-dependent

Absolute Accuracy Components – Calibrated Output

Range

(V)

% of

Reading

Offset

(mV)

Temp. Drift

(%/°C)

Absolute

Accuracy at FS

±10

±0.0183

±1.831

0.00055

±3.661 mV

0 to 10 ±0.0183

±0.915

0.00055

±2.746 mV

Absolute Accuracy – Calibrated Output

±10 V: ±4.0 LSB

0 V to 10 V: ±22.0 LSB

Relative Accuracy (±LSB)

±10 V , 0 V to 10 V: 4.0 typ, 12.0 max

Analog Current Output (USB-3102/3104/3106)

Number of Channels

USB-3102: 4

USB-3104: 8

USB-3106: 16

Each DAC8554 output controls a voltage and current output channel-pair

simultaneously. Writing to voltage channel 0 also updates current channel

0; conversely, writing to current channel 0 also updates voltage channel 0.

Disconnect unused voltage and current output channels.

Resolution: 16 bits

Output Ranges

Calibrated: 0 mA to 20 mA typ

Uncalibrated: 0 mA to 25 mA typ

Compliance voltage range (calibrated output): 8 V min, 36 V max. Formulas to

calculate the max load resistance for current output circuit operation:

Calibrated output: Load Resistance = (compliance voltage – 6 V)/0.020 A

Uncalibrated output: Load Resistance = (compliance voltage – 6 V)/0.025 A

Differential Nonlinearity

Calibrated: ±1.25 LSB typ, –2 LSB to 1 LSB max

Uncalibrated: ±0.25 LSB typ, –1 LSB to 1 LSB max

The max specification applies to the entire operating temperature range, and

accounts for max errors due to the software calibration algorithm (in calibrated

mode only) and the DAC8554 nonlinearities.

Absolute accuracy: ±0.05% of full-scale range (compliance voltage = 13 V, load

resistance = 100 Ω)

IOUTx leakage current: 100 nA typ for each individual IOUT channel (all zeros

written to IOUTx channel

Settling time: 25 µS typ (full scale step to 1 LSB accuracy; compliance voltage = 12 V,

load resistance = 500 Ω

Throughput

Single-channel: 100 Hz max, system-dependent

Multichannel: 100 Hz/#ch max, system-dependent

Analog Output Calibration

Recommended Warm-Up Time: 15 minutes min

Onboard Precision Reference

DC Level: 5.000 V ±1 mV max.

Tempco: ±10 ppm/°C max.

Long-Term Stability: ±10 ppm/SQRT(1000 hrs)

Calibration Method

USB-3101 Through USB-3106: Software calibration

USB-3110/3112/3114: SW calibration (Voutx Rload = 20 mA fixed resistive load)

Calibration Interval: 1 year

Digital I/O

Digital Logic Type: CMOS

Number of I/O: 8

Configuration: Independently-configured for input or output

Pull-Up/Pull-Down Configuration: Software-selectable; all pins floating (default)

For pull-down, connect the DIO CTL pin to a DGND pin. For pull-up, connect

the DIO CTL pin to the +5 V pin.

Digital I/O Input Loading: TTL (default); 47 kΩ (pull-up/pull down configurations)

Digital I/O Transfer Rate (System-Paced): System-dependent, 33 to 1000 port

reads/writes or single bit reads/writes per second.

Input High Voltage: 2.0 V min, 5.5 V absolute max

Input Low Voltage: 0.8 V max, –0.5 V absolute min

Output High Voltage (IOH = –2.5 mA): 3.8 V min

Output Low Voltage (IOL = 2.5 mA) : 0.7 V max

Power On and Reset State: Input

Synchronous DAC Load

Pin name: SYNCLD, Schmitt trigger input, over-current protected with a 200 Ω

series resistor.

Power On and Reset State: Input

Pin Type: Bidirectional; output the internal D/A LOAD signal, or receive the D/A

LOAD signal from an external source.

Termination: Internal 100 kΩ pull-down

Input Clock Rate: 100 Hz max

Specifications