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U2354A Datasheet, PDF (19/25 Pages) Keysight Technologies – USB Modular Multifunction Data Acquisition Devices | |||
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Product specifications
General characteristics
Number of channels
Input voltage range for voltage mode
Input voltage (thermocouple mode)
Sampling rate for thermocouple mode
Sampling rate for overall module
Thermocouple types
Input specifications
Accuracy (thermocouple mode)
ââ Overall gain error
ââ Overall offset error
ââ Nonlinearity
System noise (rms)
ââ Gain (Ã 1)
ââ Gain (Ã 100)
Common Mode Rejection Ratio (CMRR)
ââ Voltage mode
ââ Thermocouple mode
Cold junction accuracy
Input characteristics
Bandwidth (voltage mode)
Bandwidth (thermocouple mode)
Overvoltage protection1
Input impedance
Input bias current
Input offset current
Gain drift
Offset drift
Filter cutoff frequency (â3 dB)
(thermocouple mode)
Filter type (thermocouple mode)
Other features
Recommended warm up time
31 differential and 1 CJC
±10 V (signal + common mode)
±100 mV
10 kSa/s total for all channels
500 kSa/s
J, K, R, S, T, N, E, and B
0.06% (23 °C ± 5 °C )
15 μV (without zeroing) (23 °C ± 5 °C )
6 μV (with zeroing)
< 0.005% of full scale range
100 μVrms
5 μVrms
> 60 dB
> 80 dB
±1.0 °C typical (23 °C ± 5 °C )
±1.5 °C typical (0 °C to 18 °C, 28 °C to 55 °C)
> 500 kHz
4.0 Hz
TC Mode2
ââ Common mode: ±17 V (TC+ and TCâ with respect to GND)
ââ Differential mode: ±7 V (Differential voltage between TC+ and TCâ)
Bypass mode
±20 V (TC+ input with respect to GND)
Power-off Mode
±11 V (TC+, TCâ input with respect to GND)
> 1 GΩ
±2.5 nA max
±1.5 nA max
60 ppm/°C max
1 μV/°C max
4.0 Hz
Low Pass RC Filter
30 minutes
1 The overvoltage protection levels specified above indicate the maximum voltage each input pin can tolerate without resulting in any damages. However, prolonged exposure to
these levels may affect device safety and reliability. Hence, it should be avoided where possible.
2 On the channels configured for thermocouple mode, the TC+ and TCâ pins can tolerate up to ±17 V of differential voltage for a few minutes. However, exceeding a voltage
range of ±100 mV on these channels can cause additional current to be drawn from the deviceâs power supply regulators, which may damage the device if multiple channels are
overdriven for prolonged periods. This is the case when a voltage source is tied across the TCn+ and TCnâ pin. Voltage sources greater than ±100 mV should be tied to TCn+ and
GND (floating source), or TCn+ and TCn+1+ (grounded source), and have the channels set for bypass mode.
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