MAX4257EUA Просмотр технического описания (PDF) - Maxim Integrated
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MAX4257EUA Datasheet PDF : 16 Pages
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SOT23, Single-Supply, Low-Noise,
Low-Distortion, Rail-to-Rail Op Amps
Typical Operating Characteristics (continued)
(VDD = +5V, VSS = 0V, VCM = VOUT = VDD/2, input noise floor of test equipment = 10nV/√Hz for all distortion measurements,
TA = +25°C, unless otherwise noted.)
OUTPUT IMPEDANCE
vs. FREQUENCY
1000
AV = +10 (MAX4249/MAX4255/
MAX4256/MAX4257)
100
10
INPUT VOLTAGE N0ISE DENSITY
vs. FREQUENCY
30
25
20
15
0.1Hz TO 10Hz p-p NOISE
MAX4249 TOC20
VDD = 3V OR 5V
200nV/
div
1
0.1
1k
AV = +1 (MAX4250–MAX4254)
10k
100k
1M
10M
FREQUENCY (Hz)
MAX4250–MAX4254
FFT OF DISTORTION AND NOISE
0
VOUT = 2Vp-p
-20
-40
RLOAD = 1kΩ
fO = 1kHz
AV = +1
-60
-80 fO
-100
-120
-140
HD2 HD4
HD3 HD5
-160
10
5k
10k
15k
20k
FREQUENCY (Hz)
10
5
0
10
100
1k
10k
100k
FREQUENCY (Hz)
MAX4249/MAX4255/MAX4256/MAX4257
FFT OF DISTORTION AND NOISE
20
VOUT = 4Vp-p
0
fO = 1kHz
-20
VIN
VO
-40
fO
10k
-60
11k 100k
-80
-100
HD2
HD3
-120
-140
10
5k
10k
15k
20k
FREQUENCY (Hz)
Vp-p NOISE = 760nVp-p
1sec/div
MAX4250–MAX4254
THD PLUS NOISE
vs. OUTPUT VOLTAGE (VDD = 5V)
10
AV = +10
fO = 3kHz
VIN
FILTER BW = 30kHz
VO
1
RL
11k 100k
0.1
RL = 1kΩ
0.01
0.001
0
RL = 10kΩ
RL = 100kΩ
1
2
3
4
5
OUTPUT VOLTAGE (Vp-p)
MAX4250–MAX4254
THD PLUS NOISE vs.
OUTPUT VOLTAGE SWING (VDD = 3V)
10
VIN
VOUT
1
RL
11k 100k
0.1
RL = 1kΩ
0.01 AV = +10
VDD = 3V
fO = 3kHz
0.001 FILTER BW = 30kHz
0
1
RL = 10kΩ
RL = 100kΩ
2
3
OUTPUT VOLTAGE (Vp-p)
MAX4249/MAX4255/MAX4256/MAX4257
THD PLUS NOISE vs. OUTPUT VOLTAGE SWING
1
AV = +10
VIN
VOUT
RL
0.1
11k 100k
fO = 20kHz, FILTER BW = 80kHz
0.01
fO = 3kHz, FILTER BW = 30kHz
0.001
0
1
2
3
4
5
OUTPUT VOLTAGE (Vp-p)
MAX4250–MAX4254
THD PLUS NOISE vs. FREQUENCY
1
VIN
VOUT
RL
0.1
R1
R2
R1 = 560Ω, R2 = 53kΩ
0.01
R1 = 5.6kΩ, R2 = 53kΩ
AV = 100
AV = 10
0.001
0.0001
10
AV = 1
FILTER BW= 22kHz
RL = 10kΩ TO GND
VO = 2Vp-p
100
1k
10k
FREQUENCY (Hz)
6 _______________________________________________________________________________________
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