24-Bit, 204.8 kS/s Dynamic Signal Acquisition and Generation
Integrated Electronic Piezoelectric (IEPE)
Current ............................................ 0, 4, or 10 mA,
each channel independently
software-selectable
Compliance ..................................... 24 V min
Channel input impedance
with IEPE enabled............................... 1 MΩ || 240 pF,
pseudodifferential
Specifications
Typical for 25 °C unless otherwise noted.
Analog Input
Number of simultaneously sampled input channels
NI 4461 ...........................................
NI 4462 ...........................................
Input configuration.............................. Differential or pseudodifferential
(50 Ω between negative input
2
4
Current noise ..........................................<300 pA ⁄ Hz
and chassis ground), each
channel independently
Transducer Electronic Data Sheet (TEDS) Compatibility
The PCI-4461, PCI-4462, and PXI-4462 inputs work with transducer
electronic data sheet (TEDS) sensors according to the IEEE 1451
Standard. For more information about TEDS, go to ni.com/info and enter
rdteds.
software-selectable
Input coupling ..................................... AC or DC, each channel
independently software-selectable
A/D converter (ADC) resolution.......... 24 bits
ADC type ............................................. Delta-sigma
Sample rates (fs),
Analog Output (NI 4461)
samples per second (S/s) ................... 1 kS/s to 204.8 kS/s in 181.9 µS/s
increments, maximum
Output Characteristics
Number of output channels................ 2, simultaneously sampled
Output configuration........................... Differential or pseudodifferential
(50 Ω to chassis ground on shield),
Input Signal Ranges
Gain
each channel independently
software-selectable
Log (dB)
-20
-10
Full-Scale Range (Peak)
42.4 V
31.6 V
10.0 V
3.16 V
1.00 V
0.316 V
DAC resolution.................................... 24 bits
DAC type ............................................. Delta-sigma
Update rates (fs) ................................. 1 kS/s to 204.8 kS/s in 181.9 µS/s
increments, maximum
0
+10
+20
+30
1
Attenuation (dB)
Full-Scale Range (Vpk)
Amplifier Characteristics
40
20
0.1
1.0
Input Impedance
Differential Configuration Pseudodifferential Configuration
0
10.0
Between positive input
and chassis ground
1 MΩ || 217 pF
1 MΩ || 217 pF
1Each output channel range is independently software-selectable.
Between negative input
and chassis ground
1 MΩ || 229 pF
50 Ω
Output Signal Range
Voltage Output
Short circuit protection....................... Indefinite protection between
positive and negative
Input coupling ..................................... AC or DC, software-selectable
Common-mode rejection ratio
(CMRR)............................................ 80 dB with 0 dB gain;
up to 105 dB for higher gain
Dynamic Characteristics
Minimum working load....................... 600 Ω
Dynamic Characteristics
Image rejection ................................... 75 dB min < 768 kHz
66 dB min > 768 kHz
Specification
Alias-free bandwidth (BW), (passband)
Alias rejection, minimum
Low-Frequency Alias Rejection Disabled
DC to 0.4535 fs
120 dBc
AO Flatness
AC coupling
20 Hz to 20 kHz............................... 0.008 dB max
20 Hz to 92.1 kHz............................ 0.1 dB max
AO dynamic range............................... 113 dBFS, 0 dB attenuation,
102.5 kS/s (30 kHz bandwidth)
AO THD ............................................... -97 dBc up to 20 kHz
AO interchannel gain mismatch ......... 0.03 dB, 20 Hz to 92.1 kHz
-3 dB cutoff frequency.................... 3.4 Hz
-0.1 dB cutoff frequency................. 22.6 Hz
AI flatness........................................... 0.08 dB, gain ≥0 dB,
20 Hz to 92.2 kHz
AI dynamic range................................ 118 dBFS, 0 dB gain, 51.2 kS/s
THD, balanced source......................... -107 dBc up to 20 kHz,
-104 dBc up to 92.2 kHz
Crosstalk (channel separation) ........... -138 dB at 1 kHz
AI interchannel gain mismatch........... 0.003 dB up to 92.2 kHz
Internal Frequency Timebase Characteristics
Accuracy.............................................. 20 ppm, over operating
temperature range
BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.)
4
NI [ National Instruments ]
