Datasheet

1.0
0.5
0
-
-
0.5
1.0
SamplePoints
0
80
OutputVoltage(V)
302010 40 50 60 70 90 100 110 120
TGCModeI
V =1V
PGA=20dB
V =0.54V
IN PP
CNTL
1.0
0.5
0
-
-
0.5
1.0
SamplePoints
0
80
OutputVoltage(V)
302010 40 50 60 70 90 100 110 120
TGCModeI
V =0.5V
PGA=30dB
V =1V
IN PP
CNTL
1.0
0.5
0
-
-
0.5
1.0
Time( s)m
0
10
OutputVoltage(V)
5
TGCIMode
PGA=30dB
V =0Vto1.2V,40MSPS
CNTL
15
V
CNTL
1.0
0.5
0
-
-
0.5
1.0
Time ( s)m
0
20
Output ( Full-Scale)±
10
TGC I Mode
PGA = 30dB
V = 0.4V, 40MSPS
CNTL
305 15 25
PD
On = 25 s
Off = 15 s
m
m
68
67
66
65
64
63
62
61
60
59
58
57
56
V (V)
CNTL
0
1.2
SNRandSNRD(dBFS)
0.30.20.1 0.4 1.10.5 1.00.90.80.70.6
SNR
SNRD
TGCIMode
Input= 44.2dBm
Frequency=5MHz
-
PGA=30dB
PGA=20dB
9k
8k
7k
6k
5k
4k
3k
2k
1k
0
100M
Magnitude( )W
100
80
60
40
20
0
-100
Phase( )°
-80
-20
-40
-60
Frequency(Hz)
100k
1M 10M
Magnitude(Z )
IN
Phase
AFE5804
www.ti.com SBOS442C –JUNE 2008–REVISED OCTOBER 2011
TYPICAL CHARACTERISTICS (continued)
AVDD_5V = 5.0V, AVDD1 = VDD2 = DVDD = 3.3V, LVDD = 1.8V, single-ended input into LNA, ac-coupled with 1.0μF,
V
CNTL
= 1.0V, f
IN
5MHz, Clock = 40MSPS, 50% duty cycle, internal reference mode, ISET = 56kΩ, LVDS buffer setting =
3.5mA, at ambient temperature T
A
= +25°C, unless otherwise noted.
LNA OVERLOAD FULL-CHANNEL OVERLOAD
Figure 79. Figure 80.
V
CNTL
RESPONSE TIME PARTIAL POWER-DOWN/POWER-UP RESPONSE TIME
Figure 81. Figure 82.
SNR AND SNRD vs V
CNTL
MAGNITUDE AND PHASE vs FREQUENCY
Figure 83. Figure 84.
Copyright © 2008–2011, Texas Instruments Incorporated 27