OPA2836-Q1 Datasheet, PDF (33/44 Pages) Texas Instruments – Very-Low Power, Rail-to-Rail Out, Negative-Rail In, Voltage-Feedback Operational Amplifier

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OPA2836-Q1
SBOS794 – DECEMBER 2016
Application Information (continued)
The circuit shown in Figure 69 is used to test the performance. Figure 70 is the FFT plot showing the spectral
performance with a 10-kHz input frequency, and Table 3 shows the tabulated ac analysis results.
VSIG
0V
VIN
2.7 V
2k
1k
2k
2.7V
VS ₊
OPA2836-Q1
VS-
VSIG
1.35 V
100
2.2 nF
5 V 2.5 V
+In ^{VDD REF}
ADS 8326
-In
1k
1k
Copyright © 2016, Texas Instruments Incorporated
Figure 69. OPA2836-Q1 and ADS8326 Test Circuit
0
-20
-40
-60
-80
-100
-120
-140
0
20
40
60
80
100
120
f - Frequency - Hz
Figure 70. ADS8326 and OPA2836-Q1 10-kHz FFT
TONE (kHz)
10
SIGNAL (dBFS)
–0.85
Table 3. AC Analysis
SNR (dBc)
83.3
THD (dBc)
–86.6
SINAD (dBc)
81.65
SFDR (dBc)
88.9
Copyright © 2016, Texas Instruments Incorporated
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