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Product Comparison: Digital Lock-in Amplifier

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Model LI 5660 LI 5655 LI 5650 LI 5645
Frequency Range 0.5 Hz to 11 MHz 0.5 Hz to 3 MHz 1 mHz Hz to 250 kHz
Signal Input voltage (A, A-B)
10 Vrms input (C)
HF input (HF)
Current (I)
Sensitivity Voltage Input A, A-B: 10 nV to 1 V F.S.
(0.5 Hz to 3 MHz)
C: 1 mV to 10 V F.S.
(0.5 Hz to 3 MHz)
HF: 2 mV to 1 V F.S.
(10 kHz to 11 MHz)
10 nV to 1 V F.S.
Current 10 fA to 1 µA F.S. -
Input Refferred
Noise Voltage
4.5 nV/√Hz (supplement value)
PSD 2-phase, 2 PSDs 2-phase, 1 PSD
Dynamic Reserve 100 dB
Time Constant 1 µs to 50 ks 5 µs to 50 ks
Analog Output
Max. Update Rate
Approx. 1.5 M samples/s Approx. 780 k samples/s
Fractional Harmonic
Measurement
Dual Frequency
Simultaneous
External 10 MHz
Synchronous Input
Measurement
Parameter
X, Y, R, θ, DC, NOISE
Remote Control
Interface
USB, GPIB, RS-232, LAN
Dimensions
(W x H x D:mm)
430 x 88 x 400
Weight Approx 7.5 kg
Instruction Manual Document Document

Model LI 5640 LI 5630 5610B LI-575
Frequency Range 1 mHz to 100 kHz 0.5 Hz to 200 kHz
Signal Input voltage (A, A-B)
10 Vrms input (C)
HF input (HF)
Current (I)
Sensitivity Voltage Input 2 nV to 1 V F.S. 100 nV to 1 V F.S. 100 nV to 500 mV F.S.
Current 5 fA to 1 µA F.S.
Input Refferred
Noise Voltage
6 nV/√Hz (supplement value) 5 nV/√Hz (supplement value)
PSD 2-phase, 1 PSD
Dynamic Reserve 100 dB 110 dB 100 dB
Time Constant 10 µs to 30 ks 1 ms to 30 s 1.25 ms to 125 s
Analog Output
Max. Update Rate
Approx. 256 k samples/s
Fractional Harmonic
Measurement
Dual Frequency
Simultaneous
External 10 MHz
Synchronous Input
Measurement
Parameter
X, Y, R, θ, DC, RATIO, NOISE X, Y, R, θ, DC, RATIO X, Y, R, θ, (RATIO), NOISE
Remote Control
Interface
GPIB, RS-232
Dimensions
(W x H x D:mm)
434 x 132.5 x 450 432 x 132.5 x 500 480 x 149 x 500
Weight Approx. 10 kg Approx. 13.5 kg Approx. 20 kg
Instruction Manual Document Please contact
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