AFE5804_1 Datasheet, PDF (18/61 Pages) Texas Instruments – FULLY-INTEGRATED, 8-CHANNEL ANALOG FRONT-END FOR ULTRASOUND 0.89nV/√Hz, 12-Bit, 40MSPS, 101mW/Channel

AFE5804
SBOS442B – JUNE 2008 – REVISED NOVEMBER 2008.................................................................................................................................................. www.ti.com
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.
2500
2000
1500
1000
500
0
CW ACCURACY HISTOGRAM
OUTPUT OFFSET HISTOGRAM
900
800
700
600
500
400
300
200
100
0
Transconductance (mA/V)
Figure 25.
SECOND HARMONIC vs V_CNTL AND FREQUENCY
-55
5MHz
TGC I Mode
-60
PGA = 20dB, -6dBFS
-65
-70
-75
2MHz
10MHz
-80
-85
-90
0.6
0.7
0.8
0.9
1.0
1.1
1.2
V_CNTL (V)
Figure 27.
THIRD HARMONIC vs V_CNTL AND FREQUENCY
-55
TGC I Mode
PGA = 20dB, -6dBFS
-60
10MHz
-65
2MHz
-70
5MHz
-75
-80
0.6
0.7
0.8
0.9
1.0
1.1
1.2
V_CNTL (V)
Figure 29.
Code
Figure 26.
SECOND HARMONIC vs V_CNTL AND FREQUENCY
-45
TGC I Mode
-50
PGA = 20dB, -1dBFS
-55
-60
-65
10MHz
-70
-75
5MHz
-80
2MHz
-85
0.6
0.7
0.8
0.9
1.0
1.1
1.2
V_CNTL (V)
Figure 28.
THIRD HARMONIC vs V_CNTL AND FREQUENCY
-35
TGC I Mode
PGA = 20dB, -1dBFS
-40
10MHz
-45
-50
5MHz
-55
2MHz
-60
0.6
0.7
0.8
0.9
1.0
1.1
1.2
V_CNTL (V)
Figure 30.
18
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