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Data Sheet ADP7182
Rev. C | Page 15 of 28
0
–80
–70
–60
–50
–40
–30
–20
–10
1.0 5.0
4.5
4.0
3.5
3.0
2.5
2.01.5
PSRR (dB)
HEADROOM VOLTAGE (V)
FREQUENCY = 100Hz
FREQUENCY = 1kHz
FREQUENCY = 10kHz
FREQUENCY = 100kHz
FREQUENCY = 1MHz
FREQUENCY = 10MHz
10703-049
Figure 49. Power Supply Rejection Ratio (PSRR) vs. Headroom Voltage,
V
OUT
= −1.22 V, Load Current (I
LOAD
) = −200 mA
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
10 100 1k 10k 100k 1M 10M
PSRR (dB)
FREQUENCY (Hz)
I
LOAD
= –200mA
I
LOAD
= –100mA
I
LOAD
= –10mA
I
LOAD
= –1mA
10703-050
Figure 50. Power Supply Rejection Ratio (PSRR) vs. Frequency,
V
OUT
= −1.8 V vs. Different Load Currents (I
LOAD
), V
IN
= −2.8 V
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
10 100 1k 10k 100k 1M 10M
PSRR (dB)
FREQUENCY (Hz)
I
LOAD
= –200mA
I
LOAD
= –100mA
I
LOAD
= –10mA
I
LOAD
= –1mA
10703-051
Figure 51. Power Supply Rejection Ratio (PSRR) vs. Frequency,
V
OUT
= −1.8 V vs. Different Load Currents (I
LOAD
), V
IN
= −5.5 V
0
–80
–70
–60
–50
–40
–30
–20
–10
1.0
4.0
3.5
3.0
2.52.01.5
PSRR (dB)
HEADROOM VOLTAGE (V)
FREQUENCY = 100Hz
FREQUENCY = 1kHz
FREQUENCY = 10kHz
FREQUENCY = 100kHz
FREQUENCY = 1MHz
FREQUENCY = 10MHz
10703-052
Figure 52. Power Supply Rejection Ratio (PSRR) vs. Headroom Voltage,
V
OUT
= −1.8 V, Load Current (I
LOAD
) = −200 mA
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
10 100 1k 10k 100k 1M 10M
PSRR (dB)
FREQUENCY (Hz)
I
LOAD
= –200mA
I
LOAD
= –100mA
I
LOAD
= –10mA
I
LOAD
= –1mA
10703-053
Figure 53. Power Supply Rejection Ratio (PSRR) vs. Frequency,
V
OUT
= −3 V vs. Different Load Currents (I
LOAD
), V
IN
= −4.0 V
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
10 100 1k 10k 100k 1M 10M
PSRR (dB)
FREQUENCY (Hz)
I
LOAD
= –200mA
I
LOAD
= –100mA
I
LOAD
= –10mA
I
LOAD
= –1mA
10703-054
Figure 54. Power Supply Rejection Ratio (PSRR) vs. Frequency,
V
OUT
= −3 V vs. Different Load Currents (I
LOAD
), V
IN
= −5.5 V