TS4890
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图. 13 : 电源 供应 拒绝 比率 (psrr)
vs 电源 供应
图. 15 : 电源 供应 拒绝 比率 (psrr)
vs 绕过 电容
图. 17 : 电源 供应 拒绝 比率 (psrr)
vs 反馈 电阻
图. 14 : 电源 供应 拒绝 比率 (psrr)
vs 反馈 电容
图. 16 : 电源 供应 拒绝 比率 (psrr)
vs 输入 电容
图. 18 : pout @ thd + n = 1% vs 供应
电压 vs rl
10 100 1000 10000 100000
-80
-70
-60
-50
-40
-30
vcc = 5v 至 2.2v
cb = 1
µ
f &放大; 0.1
µ
F
vripple = 200mvrms
rfeed = 22k
Ω
输入 = floating
rl = 8
Ω
tamb = 25
°
C
psrr (db)
频率 (hz)
10 100 1000 10000 100000
-80
-70
-60
-50
-40
-30
-20
-10
Cb=47
µ
F
Cb=100
µ
F
Cb=10
µ
F
Cb=1
µ
F
vcc = 5 至 2.2v
rfeed = 22k
rin = 22k, cin = 1
µ
F
rg = 100
Ω
, rl = 8
Ω
tamb = 25
°
C
psrr (db)
频率 (hz)
10 100 1000 10000 100000
-80
-70
-60
-50
-40
-30
-20
-10
Rfeed=22k
Ω
Rfeed=10k
Ω
Rfeed=47k
Ω
Rfeed=110k
Ω
vcc = 5 至 2.2v
cb = 1
µ
f &放大; 0.1
µ
F
vripple = 200mvrms
输入 = floating
rl = 8
Ω
tamb = 25
°
C
psrr (db)
频率 (hz)
10 100 1000 10000 100000
-80
-70
-60
-50
-40
-30
-20
-10
Cfeed=680pF
Cfeed=330pF
Cfeed=150pF
Cfeed=0
vcc = 5 至 2.2v
cb = 1
µ
f &放大; 0.1
µ
F
rfeed = 22k
Ω
vripple = 200mvrms
输入 = floating
rl = 8
Ω
tamb = 25
°
C
psrr (db)
频率 (hz)
10 100 1000 10000 100000
-60
-50
-40
-30
-20
-10
Cin=22nF
Cin=100nF
Cin=220nF
Cin=330nF
Cin=1
µ
F
vcc = 5 至 2.2v
rfeed = 22k, rin = 22k
cb = 1
µ
F
rg = 100
Ω
, rl = 8
Ω
tamb = 25
°
C
psrr (db)
频率 (hz)
2.5 3.0 3.5 4.0 4.5 5.0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
32
Ω
16
Ω
4
Ω
6
Ω
gv = 2 &放大; 10
cb = 1
µ
F
f = 1khz
bw < 125khz
tamb = 25
°
C
8
Ω
输出 电源 @ 1% thd + n (w)
vcc (v)