AD9279 Просмотр технического описания (PDF) - Analog Devices
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AD9279 Datasheet PDF : 44 Pages
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AD9279
SPECIFICATIONS
AC SPECIFICATIONS
AVDD1 = 1.8 V, AVDD2 = 3.0 V, DRVDD = 1.8 V, 1.0 V internal ADC reference, full temperature range (−40°C to +85°C), fIN = 5 MHz,
RS = 50 Ω, RFB = ∞ (unterminated), LNA gain = 21.3 dB, LNA bias = default, PGA gain = 27 dB, GAIN− = 0.8 V, GAIN+ = 0 V, AAF LPF
cutoff = fSAMPLE/3 (MODE I/II) = fSAMPLE/4.5 (MODE III), HPF cutoff = LPF cutoff/12, MODE I = fSAMPLE = 40 MSPS, MODE II = fSAMPLE =
65 MSPS, MODE III = fSAMPLE = 80 MSPS, low power LVDS mode, unless otherwise noted.
Table 1.
Parameter1
Test Conditions/Comments
Min
LNA CHARACTERISTICS
Gain
Single-ended input to differential
output
Single-ended input to single-ended
output
0.1 dB Input Compression Point
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
1 dB Input Compression Point
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
Input Common Mode (LI-x, LG-x)
Output Common Mode (LO-x)
Switch off
Switch on
Output Common Mode (LOSW-x) Switch off
Switch on
Input Resistance (LI-x)
RFB = 350 Ω, LNA gain = 21.3 dB
RFB = 1400 Ω, LNA gain = 21.3 dB
RFB = ∞, LNA gain = 21.3 dB
Input Capacitance (LI-x)
−3 dB Bandwidth
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
Input Noise Voltage
RS = 0 Ω, RFB = ∞
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
Input Noise Current
RFB = ∞
Noise Figure
RS = 50 Ω
Active Termination Matched
LNA gain = 15.6 dB, RFB = 200 Ω
LNA gain = 17.9 dB, RFB = 250 Ω
LNA gain = 21.3 dB, RFB = 350 Ω
Unterminated
LNA gain = 15.6 dB, RFB = ∞
LNA gain = 17.9 dB, RFB = ∞
LNA gain = 21.3 dB, RFB = ∞
FULL-CHANNEL (TGC)
CHARACTERISTICS
AAF Low-Pass Cutoff
−3 dB, programmable
8
In Range AAF Bandwidth
Tolerance
Group Delay Variation
f = 1 MHz to 18 MHz, GAIN+ = 0 V to 1.6 V
Typ
Max
15.6/17.9/21.3
9.6/11.9/15.3
1.00
0.75
0.45
1.20
0.90
0.60
2.2
High-Z
1.5
High-Z
1.5
50
200
6
22
150
130
100
0.95
0.85
0.75
2.5
4.5
3.7
2.9
3.1
2.6
2.2
18
±10
±0.3
Unit
dB
dB
V p-p
V p-p
V p-p
V p-p
V p-p
V p-p
V
Ω
V
Ω
V
Ω
Ω
kΩ
pF
MHz
MHz
MHz
nV/√Hz
nV/√Hz
nV/√Hz
pA/√Hz
dB
dB
dB
dB
dB
dB
MHz
%
ns
Rev. 0 | Page 3 of 44
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