SM6661A Datasheet, PDF (12/14 Pages) Nippon Precision Circuits Inc – Post-amplifier for Gyroscope

SM6661A
1.655
1.650
∆V_OUT
1.645
0
∆I_S
Output impedance
∆V_OUT/∆I_S = 3Ω
100 200 300 400 500
I_S [µA]
Figure 7. Output current vs. Output voltage^*1
(VSIG_OUT1, VSIG_OUT2 pins)
1000
100
10
1
0.1
0.01 0.1
1
10 100
Frequency [Hz]
1000
Figure 8. Output noise vs. Frequency^*2
−60
−70
−80
−90
−100
−110
−120
1
10
100
Frequency [Hz]
1000
Figure 9. Crosstalk vs. Frequency^*3
*1. I_S indicates the source current of VSIG_OUT1 or VSIG_OUT2 pins.
*2. When short-circuiting between VSIG_IN1 and VREF_IN1 pins, VSIG_IN2 and VREF_IN2 pins, without inputting external signal.
Measurement equipment: Agilent 35670A FFT Dynamic Signal Analyzer, in “FFT ANALYSIS” mode
Input referred voltage noise at 1Hz frequency: 0.05µVrms/√Hz
(calculated based on 35µVrms/√Hz output noise at 1Hz frequency and 36.8 dB output gain “Gain2”)
*3. When measured without connecting feedback capacitor C₂ for variable gain amplifier, high-frequency bandwidth is not limited.
SEIKO NPC CORPORATION —12