THS4541-Q1 Datasheet, PDF (14/60 Pages) Texas Instruments – 850-MHz Fully Differential Amplifier

THS4541-Q1
SLOS930A – NOVEMBER 2015 – REVISED NOVEMBER 2015
www.ti.com
7.7.2 3-V Single Supply
At Vs+ = 3 V, Vs– = GND, Vocm is open, 50-Ω single-ended input to differential output, gain = 2 V/V, Rload = 500 Ω, and T_A
≈ 25°C (unless otherwise noted).
9
G=0.1
6
G=1
G=2
G=5
3
G=10
0
-3
-6
-9
-12
1
10
100
1000
Frequency (MHz)
D019
Rf = 402 Ω, Vout = 100 mV_PP, see Figure 61 and Table 6 for
resistor values
Figure 19. Small-Signal Frequency Response vs Gain
9
Vocm=1.0 V
Vocm=1.5 V
8
Vocm=1.8 V
7
6
5
4
3
10
100
1000
Frequency (MHz)
D021
Vout = 100 mV_PP, see Figure 61 with Vocm adjusted
Figure 21. Small-Signal Frequency response vs Vocm
9
Cload=10 pF, Ro=27 :
Cload=22 pF, Ro=18 :
8
Cload=51 pF, Ro=10 :
Cload=100 pF, Ro=5.4 :
7
6
5
4
3
10
100
1000
Frequency (MHz)
D023
100 mV_PP at load, Av = 2 (see Figure 71), two series Ro added
at output before Cload
Figure 23. Small-Signal Frequency Response vs Cload
9
6
3
0
-3
-6
Vo=100 mVpp
Vo=500 mVpp
-9
Vo=1 Vpp
Vo=2 Vpp
Vo=5 Vpp
-12
10
100
1000
Frequency (MHz)
D020
See Figure 61 with V_CC = 3 V and Vocm = 1.5 V
Figure 20. Frequency Response vs Vopp
9
RL=50 :
RL=100 :
8
RL=200 :
RL=500 :
7
RL=1000 :
6
5
4
3
10
100
1000
Frequency (MHz)
D022
Vout = 100 mV_PP, see Figure 61 with the Rload adjusted
Figure 22. Small-Signal Frequency Response vs Rload
40
Av=2
35
Av=4
Av=10
30
25
20
15
10
5
0
1
10
100
Differential Cload (pF)
D024
Two Ro at output to differential Cload in parallel with 500 Ω, see
Figure 71 and Table 6
Figure 24. Recommended Ro vs Cload
14
Submit Documentation Feedback
Product Folder Links: THS4541-Q1
Copyright © 2015, Texas Instruments Incorporated