AD9271 Analog Devices, AD9271 Datasheet - Page 4

• Manufacturer Part Number: AD9271
• Description: Octal LNA/VGA/AAF/ADC and Crosspoint Switch
• Manufacturer: Analog Devices

Specifications of AD9271

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 50MSPS
• Interface: LVDS,Ser
• Analog Input Type: SE-Uni
• Ain Range: 0.25 V p-p,0.32 V p-p,0.4 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD9271
SPECIFICATIONS
AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, CWVDD = 3.3 V, 1.0 V internal ADC reference, f
LPF cutoff = 1/3 × f
Table 1.
Parameter
LNA CHARACTERISTICS
FULL-CHANNEL (TGC)
Gain = 5/6/8
Input Voltage Range,
Input Common
Input Resistance
Input Capacitance
−3 dB Bandwidth
Input Noise Current,
Input Noise Voltage,
1 dB Input
Noise Figure
CHARACTERISTICS
AAF High-Pass Cutoff
AAF Low-Pass Cutoff
Bandwidth Tolerance
Group Delay Variation
Input-Referred Noise
Correlated Noise Ratio
Output Offset
Signal-to-Noise Ratio
Gain = 5/6/8
Mode
Gain = 5/6/8
Gain = 5/6/8
Compression
Point, Gain = 5/6/8
Active Termination
Unterminated
Voltage
(SNR)
f
at −7 dBFS
f
at −1 dBFS
IN
IN
= 5 MHz
= 5 MHz
Match
1
S
, HPF cutoff = 700 kHz, full temperature, unless otherwise noted.
RFB = 200 Ω
RFB = ∞
Conditions
Single-ended input
to differential output
Single-ended input
to single-ended
output
LNA output limited
to 2 V p-p differential
output
RFB = 400 Ω
RFB = ∞
LI-x
R
V
R
−3 dB
−3 dB, programmable
f = 1 to 18 MHz,
gain = 0 V to 1 V
LNA gain = 5/6/8,
RFB = ∞
No signal, correlated/
uncorrelated
AAF high pass =
700 kHz
V
V
S
GAIN
S
GAIN
GAIN
= 50 Ω, RFB = 200 Ω
= 0 Ω, RFB = ∞
= 0 V
= 0 V
= 1 V
Min
−50
Typ
14/15.6/18
8/9.6/12
400/333/250
1.4
50
100
15
15
40
1.1
1.4/1.4/1.3
770/650/495
6.7
4.9
DC/350/700
1/3 × f
(8 to 18)
±15
±2
1.7/1.6/1.5
−30
65.8
62
AD9271-25
SAMPLE
Rev. B | Page 4 of 60
Max
+50
Min
−35
Typ
14/15.6/18
8/9.6/12
400/333/250
1.4
50
100
15
15
60
1.1
1.3/1.2/1.1
770/650/495
6.7
4.4
DC/350/700
1/3 × f
(8 to 18)
±15
±2
1.6/1.4/1.3
−30
64.4
59.7
AD9271-40
IN
= 5 MHz, R
SAMPLE
Max
+35
S
= 50 Ω, LNA gain = 15.6 dB (6), AAF
Min
−35
Typ
14/15.6/18
8/9.6/12
400/333/250
1.4
50
100
15
15
70
1.3/1.2/1.1
770/650/495
6.7
4.2
DC/350/700
1/3 × f
(8 to 18)
±15
±2
1.6/1.4/1.2
−30
59
1.1
63.7
AD9271-50
SAMPLE
Max
+35
Unit
dB
dB
mV p-p
SE
V
Ω
Ω
kΩ
pF
MHz
pA/√Hz
nV/√Hz
mV p-p
dB
dB
kHz
MHz
%
ns
nV/√Hz
dB
LSB
dBFS
dBFS
2