6.8 Typical Characteristics (continued)

at TA = 25°C, VS = ±20 V, VCM = VS / 2, RLOAD = 10 kΩ connected to VS / 2, and CL = 10 pF (unless otherwise noted)

Temperature (°C)

-40

-20

0

20

40

60

80

100

120

140

88

92

96

100

104

108

112

116

120

124

D015

VS = 40 V

VS = 4 V

f = 0 Hz

Figure 6-19. CMRR vs Temperature (dB)

Temperature (°C)

-40

-20

0

20

40

60

80

100

120

140

135

136

137

138

139

140

141

142

143

144

145

D016

f = 0 Hz

Figure 6-20. PSRR vs Temperature (dB)

Time (1s/Div)

C015

Figure 6-21. 0.1-Hz to 10-Hz Noise

Frequency (Hz)

0

10

20

30

40

50

60

70

80

90

100

110

120

10

100

1k

10k

100k

C017

Figure 6-22. Input Voltage Noise Spectral Density vs Frequency

Frequency (Hz)

-110

-100

-90

-80

-70

-60

-50

-40

100

1k

10k

C012

RL = 10 k:

RL = 2 k:

RL = 600 :

RL = 128 :

BW = 80 kHz, VOUT = 1 VRMS

Figure 6-23. THD+N Ratio vs Frequency

Amplitude (VRMS)

0.001

0.01

0.1

1

10 20

20

-100

-90

-80

-70

-60

-50

-40

-30

C023

RL = 10 k:

RL = 2 k:

RL = 549 :

RL = 128 :

BW = 80 kHz, f = 1 kHz

Figure 6-24. THD+N vs Output Amplitude

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OPA4990-Q1

SBOSAH7 – OCTOBER 2023

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