Datasheet

AD9273
Rev. B | Page 4 of 48
SPECIFICATIONS
AC SPECIFICATIONS
AVDD1 = 1.8 V, AVDD2 = 3.0 V, DRVDD = 1.8 V, 1.0 V internal ADC reference, f
IN
= 5 MHz, R
S
= 50 Ω, LNA gain = 21.3 dB, LNA bias =mid-
high (default), PGA gain = 24 dB, GAIN− = 0.8 V, AAF LPF cutoff = f
SAMPLE
/3 (default), HPF = LPF cutoff/20.7 (default), full temperature,
ANSI-644 LVDS mode, unless otherwise noted.
Table 1.
AD9273-25 AD9273-40 AD9273-50
Parameter
1
Conditions Min Typ Max Min Typ Max Min Typ Max Unit
LNA CHARACTERISTICS
Gain Single-ended
input to
differential
output
15.6/17.9/21.3 15.6/17.9/21.3 15.6/17.9/21.3 dB
Single-ended
input to
single-ended
output
9.6/11.9/15.3 9.6/11.9/15.3 9.6/11.9/15.3 dB
Input Voltage Range LNA gain =
15.6 dB/
17.9 dB/
21.3 dB,
LNA output
limited to
4.4 V p-p
differential
output
733/550/367 733/550/367 733/550/367 mV p-p
SE
2
Input Common
Mode
0.9 0.9 0.9 V
Input Resistance R
FB
= 250 Ω 50 50 50 Ω
R
FB
= 500 Ω 100 100 100 Ω
R
FB
= ∞ 15 15 15 kΩ
Input Capacitance LI-x 22 22 22 pF
−3 dB Bandwidth 70 70 70 MHz
Input-Referred
Noise Voltage
LNA gain =
15.6 dB/
17.9 dB/
21.3 dB,
R
S
= 0 Ω,
R
FB
= ∞
1.6/1.42/1.26 1.6/1.42/1.26 1.6/1.42/1.26 nV/√Hz
Input Noise Current R
FB
= ∞ 1 1 1 pA/√Hz
1 dB Input Com-
pression Point
LNA gain =
15.6 dB/
17.9 dB/
21.3 dB,
GAIN+ = 0 V
1.0/0.8/0.5 1.0/0.8/0.5 1.0/0.8/0.5 mV p-p
Noise Figure LNA gain =
15.6 dB/
17.9 dB/
21.3 dB
Active Termina-
tion Matched
R
S
= 50 Ω,
R
FB
= 200 Ω/
250 Ω/350 Ω
5.8/5.1/4.3 5.8/5.1/4.3 5.8/5.1/4.3 dB
Unterminated R
FB
= ∞ 6.3/5.3/4.4 6.3/5.3/4.4 6.3/5.3/4.4 dB
FULL-CHANNEL (TGC)
CHARACTERISTICS
AAF Low-Pass Filter
Cutoff
In range, −3 dB,
programmable
8 to 18 8 to 18 8 to 18 MHz
Out of range,
3
−3 dB, pro-
grammable,
>>AAF band-
width tolerance
5 to 8, 18 to 35 5 to 8, 18 to 35 5 to 8, 18 to 35 MHz