AFE5818_15 Datasheet, PDF (22/156 Pages) Texas Instruments – AFE5818 16-Channel, Ultrasound, Analog Front-End with 140-mW/Channel Power, 0.75-nV/√Hz Noise, 14-Bit, 65-MSPS or 12-Bit, 80-MSPS ADC, and Passive CW Mixer

AFE5818
SBAS687B – FEBRUARY 2015 – REVISED AUGUST 2015
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8.9 Typical Characteristics
At T_A = 25°C, AVDD_1P8 = 1.8 V, AVDD_3P3 = 3.3 V, AVDD_5V = 5 V, DVDD_1P2 = 1.2 V, DVDD_1P8 = 1.8 V, ac-
coupled with a 0.1-µF capacitor at INP, 15-nF capacitor to ground at INM, no active termination, VCNTLP = VCNTLM = 0 V,
LNA = 18 dB, PGA = 24 dB, LPF filter = 15 MHz, low-noise mode, internal 500-Ω CW feedback resistor, 14-bit ADC
resolution, ADC_CLKP and ADC_CLKM = 50-MHz differential, LVDS mode to capture ADC data, input signal frequency f_IN =
5 MHz, and output amplitude V_OUT = –1 dBFS, unless otherwise noted. Minimum and maximum values are specified across
the full temperature range.
45
Low Noise
40
Low Power
Medium Power
35
30
25
20
15
10
5
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5
VCNTL (V)
D002
Across power modes
Figure 2. Gain vs VCNTL
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
D004
Gain Matching (dB)
VCNTL = 0.3 V
Figure 4. Gain Matching Histogram (17472 Channels)
4000
3500
3000
2500
2000
1500
1000
500
0
D006
Gain Matching (dB)
VCNTL = 0.9 V
Figure 6. Gain Matching Histogram (17472 Channels)
45
-40GC
40
25GC
85GC
35
30
25
20
15
10
5
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2
VCNTL (V)
D003
Across temperature
Figure 3. Gain vs VCNTL
4500
4000
3500
3000
2500
2000
1500
1000
500
0
D005
Gain Matching (dB)
VCNTL = 0.6 V
Figure 5. Gain Matching Histogram (17472 Channels)
2500
2000
1500
1000
500
0
D007
ADC Output
VCNTL = 0 V
Figure 7. Output Offset Histogram (17472 Channels)
22
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