Datasheet
−0.7
−0.6
−0.5
−0.4
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
−0.7
−0.6
−0.5
−0.4
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0
1000
2000
3000
4000
5000
6000
7000
8000
Gain (dB)
Number of Occurrences
G005
−72
−68
−64
−60
−56
−52
−48
−44
−40
−36
−32
−28
−24
−20
−16
−12
−8
−4
0
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
68
−72
−68
−64
−60
−56
−52
−48
−44
−40
−36
−32
−28
−24
−20
−16
−12
−8
−4
0
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
68
0
10
20
30
40
50
60
70
80
90
100
110
120
ADC Output
Number of Occurrences
G058
−0.9
−0.8
−0.7
−0.6
−0.5
−0.4
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
0.4
0.5
−0.9
−0.8
−0.7
−0.6
−0.5
−0.4
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
0.4
0.5
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
Gain (dB)
Number of Occurrences
G004
−0.7
−0.6
−0.5
−0.4
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
−0.7
−0.6
−0.5
−0.4
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
Gain (dB)
Number of Occurrences
G005
0
5
10
15
20
25
30
35
40
45
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5
Vcntl (V)
Gain (dB)
Low noise
Medium power
Low power
0
5
10
15
20
25
30
35
40
45
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
Vcntl (V)
Gain (dB)
−40 deg C
25 deg C
85 deg C
AFE5808A
SLOS729B –OCTOBER 2011–REVISED APRIL 2012
www.ti.com
TYPICAL CHARACTERISTICS
AVDD_5 V = 5 V, AVDD = 3.3 V, AVDD_ADC = 1.8 V, DVDD = 1.8 V, ac-coupled with 0.1 µF caps at INP and 1
5nF caps at INM, No active termination, VCNTL = 0 V, FIN = 5 MHz, LNA = 18 dB, PGA = 24 dB, 14 Bit, sample
rate = 65 MSPS, LPF Filter = 15 MHz, low noise mode, V
OU
T = -1dBFS, 500 Ω CW feedback resistor, CMOS
16X clock, ADC is configured in internal reference mode, single-ended VCNTL mode, VCNTLM = GND, at
ambient temperature T
A
= +25C, unless otherwise noted.
Figure 2. Gain vs. VCNTL, LNA = 18 dB and PGA = 24 dB Figure 3. Gain Variation vs. Temperature, LNA = 18 dB and
PGA = 24 dB
Figure 4. Gain Matching Histogram, Figure 5. Gain Matching Histogram,
VCNTL= 0.3V (34951 channels) VCNTL = 0.6V (34951 channels)
Figure 6. Gain Matching Histogram, Figure 7. Output Offset Histogram, VCNTL = 0V (1247
channels)
VCNTL = 0.9V (34951 channels)
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