AD9674 데이터 시트보기 (PDF) - Analog Devices
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AD9674 Datasheet PDF : 47 Pages
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AD9674
Data Sheet
SPECIFICATIONS
AC SPECIFICATIONS
AVDD1 = 1.8 V, AVDD2 = 3.0 V, DVDD = 1.4 V, DRVDD = 1.8 V, 1.0 V internal ADC reference, full temperature range (0°C to 85°C),
fIN = 5 MHz, local oscillator (LO) band mode, RS = 50 Ω, RFB = ∞ (unterminated), LNA gain = 21.6 dB, LNA bias = midhigh, programmable gain
amplifier (PGA) gain = 27 dB, analog gain control, VGAIN = (GAIN+) − (GAIN−) = 1.6 V, AAF LPF cutoff = fSAMPLE/3 in Mode I1/Mode II,1 AAF
LPF cutoff = fSAMPLE/4.5 in Mode III1/Mode IV,1 HPF cutoff = LPF cutoff/12.00, Mode I1 = fSAMPLE = 40 MSPS, Mode II1 = fSAMPLE = 65 MSPS,
Mode III1 = fSAMPLE = 80 MSPS, Mode IV1 = fSAMPLE = 125 MSPS, RF decimator bypassed, digital filter bypassed, and low power LVDS mode,
unless otherwise noted. All gain setting options are listed, which can be configured via SPI registers, and all power supply currents and power
dissipations are listed for the four mode settings (Mode I, Mode II, Mode III, and Mode IV).1
Table 1.
Parameter2
Test Conditions/Comments
Min Typ
Max
LNA CHARACTERISTICS
Gain
Single-ended input to differential output
15.6/17.9/21.6 3
Single-ended input to single-ended
output
9.6/11.9/15.63
0.1 dB Input Compression Point
LNA gain = 15.6 dB
1.00
LNA gain = 17.9 dB
0.75
LNA gain = 21.6 dB
0.45
1 dB Input Compression Point
LNA gain = 15.6 dB
1.20
LNA gain = 17.9 dB
0.90
LNA gain = 21.6 dB
0.60
Input Common Mode (LI-x, LG-x)
2.2
Output Common Mode (LO-x)
Switch off
High-Z
Switch on
1.5
Output Common Mode (LOSW-x)
Switch off
High-Z
Switch on
1.5
Input Resistance (LI-x)
RFB = 300 Ω
50
RFB = 1350 Ω
200
RFB = ∞ (unterminated)
6
Input Capacitance (LI-x)
20
Input Referred Noise Voltage
RS = 0 Ω
LNA gain = 15.6 dB
0.83
LNA gain = 17.9 dB
0.82
LNA gain = 21.6 dB
0.78
Input SNR
Noise bandwidth = 15 MHz,
94
LNA gain = 21.6 dB
Input Referred Noise Current
2.6
FULL CHANNEL (TGC) CHARACTERISTICS
AAF Low-Pass Cutoff
−3 dB, programmable, low band mode 8
18
−3 dB, programmable, high band mode 13.5
30
In Range AAF Bandwidth Tolerance
±10
Group Delay Variation
f = 1 MHz to 18 MHz, VGAIN = −1.6 V to +1.6 V
±350
Input Referred Noise Voltage
LNA gain = 15.6 dB
0.96
LNA gain = 17.9 dB
0.90
LNA gain = 21.6 dB
0.82
Noise Figure
RS = 50 Ω
Active Termination Matched
LNA gain = 15.6 dB, RFB = 150 Ω
5.6
LNA gain = 17.9 dB, RFB = 200 Ω
4.8
LNA gain = 21.6 dB, RFB = 300 Ω
3.8
Unterminated
LNA gain = 15.6 dB
3.2
LNA gain = 17.9 dB
2.9
LNA gain = 21.6 dB
2.6
Correlated Noise Ratio
No signal, correlated/uncorrelated
−30
Rev. A | Page 4 of 47
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
nV/√Hz
nV/√Hz
nV/√Hz
dB
pA/√Hz
MHz
MHz
%
ps
nV/√Hz
nV/√Hz
nV/√Hz
dB
dB
dB
dB
dB
dB
dB
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