Keysight Technologies U2652ADigital USB input module U2652A OPT 902 + ABD Ficha De Dados
Códigos do produto
U2652A OPT 902 + ABD
39
Product specifi cations
General characteristics
Number of channels
31 differential and 1 CJC
Input voltage range for voltage mode
±10 V (signal + common mode)
Input voltage (thermocouple mode)
±100 mV
Sampling rate for thermocouple mode
10 kSa/s total for all channels
Sampling rate for overall module
500 kSa/s
Thermocouple types
J, K, R, S, T, N, E, and B
Input specifi cations
Accuracy (thermocouple mode)
• Overall gain error
• Overall offset error
• Overall gain error
• Overall offset error
• Nonlinearity
0.06% (23 °C ± 5 °C )
15 μV (without zeroing) (23 °C ± 5 °C )
6 μV (with zeroing)
< 0.005% of full scale range
15 μV (without zeroing) (23 °C ± 5 °C )
6 μV (with zeroing)
< 0.005% of full scale range
System noise (rms)
• Gain (× 1)
• Gain (× 100)
• Gain (× 1)
• Gain (× 100)
100 μVrms
5 μVrms
5 μVrms
Common Mode Rejection Ratio (CMRR)
• Voltage
• Voltage
mode
• Thermocouple
mode
> 60 dB
> 80 dB
> 80 dB
Cold junction accuracy
±1.0 °C typical (23 °C ± 5 °C )
±1.5 °C typical (0 °C to 18 °C, 28 °C to 55 °C)
±1.5 °C typical (0 °C to 18 °C, 28 °C to 55 °C)
Input characteristics
Bandwidth (voltage mode)
> 500 kHz
Bandwidth (thermocouple mode)
4.0 Hz
Overvoltage protection
[1]
TC Mode
[2]
• Common mode: ±17 V (TC+ and TC– with respect to GND)
• Differential mode: ±7 V (Differential voltage between TC+ and TC–)
Bypass mode
• Differential mode: ±7 V (Differential voltage between TC+ and TC–)
Bypass mode
±20 V (TC+ input with respect to GND)
Power-off Mode
±11 V (TC+, TC– input with respect to GND)
Input impedance
> 1 GΩ
Input bias current
±2.5 nA max
Input offset current
±1.5 nA max
Gain drift
60 ppm/°C max
Offset drift
1 μV/°C max
Filter cutoff frequency (–3 dB)
(thermocouple mode)
(thermocouple mode)
4.0 Hz
Filter type (thermocouple mode)
Low Pass RC Filter
Other features
Recommended warm up time
30 minutes
[1]
The overvoltage protection levels specifi ed 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 confi gured for thermocouple mode, the TC+ and TC– 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 device’s 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 TC
may damage the device if multiple channels are overdriven for prolonged periods. This is the case when a voltage source is tied across the TC
n
+ and
TC
n
– pin. Voltage sources greater than ±100 mV should be tied to TC
n
+ and GND (fl oating source), or TC
n
+ and TC
n+1
+ (grounded source), and have
the channels set for bypass mode.