AD9276 Analog Devices, AD9276 Datasheet - Page 4

• Manufacturer Part Number: AD9276
• Description: Octal LNA/VGA/AAF/12-Bit ADC and CW I/Q Demodulator
• Manufacturer: Analog Devices

Specifications of AD9276

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 80MSPS
• Interface: LVDS,Ser
• Analog Input Type: SE-Uni
• Ain Range: 2 V p-p
• Adc Architecture: n/a
• Pkg Type: QFP

AD9276
SPECIFICATIONS
AC SPECIFICATIONS
AVDD1 = 1.8 V, AVDD2 = 3.0 V, DRVDD = 1.8 V, 1.0 V internal ADC reference, f
PGA gain = 27 dB, GAIN− = 0.8 V, AAF LPF cutoff = f
Mode I = f
otherwise noted.
Table 1.
Parameter
LNA CHARACTERISTICS
FULL-CHANNEL (TGC)
Gain
Input Voltage Range
Input Common Mode (LI-x, LG-x)
Output Common Mode (LO-x)
Output Common Mode (LOSW-x)
Input Resistance (LI-x)
Input Capacitance (LI-x)
−3 dB Bandwidth
Input Noise Voltage
Input Noise Current
1 dB Input Compression Point
Noise Figure
CHARACTERISTICS
AAF Low-Pass Cutoff
In Range AAF Bandwidth
Group Delay Variation
Input-Referred Noise Voltage
(Single-Ended)
Active Termination Matched
Unterminated
In Range
Tolerance
SAMPLE
1
= 40 MSPS, Mode II = f
Test Conditions/Comments
Single-ended input to differential output
Single-ended input to single-ended output
LNA output limited to 4.4 V p-p differential
output
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
Switch off
Switch on
R
R
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
GAIN+ = 0 V
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
R
LNA gain = 17.9 dB, R
LNA gain = 21.3 dB, R
LNA gain = 17.9 dB, R
LNA gain = 21.3 dB, R
−3 dB, programmable
f = 1 MHz to 18 MHz, GAIN+ = 0 V to 1.6 V
GAIN+ = 1.6 V, R
LNA gain = 15.6 dB
LNA gain = 17.9 dB
LNA gain = 21.3 dB
R
R
R
LNA gain = 15.6 dB, R
LNA gain = 15.6 dB, R
SAMPLE
FB
FB
FB
S
FB
S
= 0 Ω, R
= 50 Ω
= 250 Ω
= 500 Ω
= ∞
= ∞
= 65 MSPS, Mode III = f
FB
= ∞
SAMPLE
FB
= ∞
/3 (Mode I/Mode II), f
FB
FB
FB
FB
FB
FB
Rev. 0 | Page 4 of 48
= 200 Ω
= 250 Ω
= 350 Ω
= ∞
= ∞
= ∞
SAMPLE
= 80 MSPS, full temperature, ANSI-644 LVDS mode, unless
IN
SAMPLE
= 5 MHz, R
/4.5 (Mode III), HPF cutoff = LPF cutoff/20.7 (default),
Min
8
S
= 50 Ω, LNA gain = 21.3 dB, LNA bias = high,
Typ
15.6/17.9/21.3
9.6/11.9/15.3
733
550
367
1.0
1.5
High-Z
1.5
50
100
15
22
100
0.98
0.86
0.75
1
1.0
0.8
0.5
4.8
4.1
3.2
3.4
2.8
2.3
±10
±0.5
1.26
1.04
0.85
Max
18
Unit
dB
dB
mV p-p
mV p-p
mV p-p
V
V
Ω
V
Ω
Ω
kΩ
pF
MHz
nV/√Hz
nV/√Hz
nV/√Hz
pA/√Hz
V p-p
V p-p
V p-p
dB
dB
dB
dB
dB
dB
MHz
%
ns
nV/√Hz
nV/√Hz
nV/√Hz