Analog Devices AD9273, Manual

Page: 7 / 49

AD9273
Rev. B | Page 6 of 48
AD9273-25 AD9273-40 AD9273-50
Parameter
1
Conditions Min Typ Max Min Typ Max Min Typ Max Unit
GAIN ACCURACY 25°C
Gain Law Confor-
mance Error
0 V < GAIN+
< 0.16 V 1.5 1.5 1.5 dB
0.16 V < GAIN+
< 1.44 V −1.6 +1.6 −1.6 +1.6 −1.7 +1.7 dB
1.44 V < GAIN+
< 1.6 V −2.5 −2.5 −2.5 dB
Linear Gain Error GAIN+ = 0.8 V,
normalized for
ideal AAF loss −1.6 +1.6 −1.6 +1.6 −1.7 +1.7 dB
Channel-to-Channel
Matching
0.16 V < GAIN+
< 1.44 V 0.1 0.1 0.1 dB
GAIN CONTROL
INTERFACE
Normal Operating
Range
0 1.6 0 1.6 0 1.6 V
Gain Range GAIN+ =
0 V to 1.6 V 42 42 42 dB
Scale Factor 28 28 28 dB/V
Response Time 42 dB change 750 750 750 ns
Gain+ Impedance Single ended 10 10 10 MΩ
Gain− Impedance Single ended 70 70 70 kΩ
CW DOPPLER MODE
Transconductance Differential,
LNA gain =
15.6 dB/
17.9 dB/
21.3 dB
5.4/7.3/10.9 5.4/7.3/10.9 5.4/7.3/10.9 mA/V
Output Level Range Differential,
CW Doppler
output pins 1.5 3.6 1.5 3.6 1.5 3.6 V
Input-Referred
Noise Voltage
LNA gain =
15.6 dB/
17.9 dB/
21.3 dB,
R
S
= 0 Ω,
R
FB
= ∞,
R
L
= 675 Ω
2.6/2.1/1.6 2.6/2.1/1.6 2.6/2.1/1.6 nV/√Hz
Input-Referred
Dynamic Range
LNA gain =
15.6 dB/
17.9 dB/
21.3 dB,
R
S
= 0 Ω,
R
FB
= ∞
160/159/158 160/159/158 160/159/158 dBFS/√Hz
Two-Tone IMD3
(2 × F1 − F2)
Distortion
f
IN1
= 5.0 MHz at
−1 dBFS (FS at
LNA input), f
IN2
=
5.01 MHz at
−21 dBFS (FS at
LNA input), LNA
gain = 21.3 dB
−70 −70 −70 dBc
Output DC Bias Single ended,
per channel 2.4 2.4 2.4 mA
Maximum Output
Swing
Single ended,
per channel ±2 ±2 ±2 mA p-p
POWER SUPPLY
AVDD1 1.7 1.8 1.9 1.7 1.8 1.9 1.7 1.8 1.9 V
AVDD2 2.7 3.0 3.6 2.7 3.0 3.6 2.7 3.0 3.6 V
DRVDD 1.7 1.8 1.9 1.7 1.8 1.9 1.7 1.8 1.9 V
I
AVDD1
Full-channel
mode 158 186 223 mA
CW Doppler
mode with four
channels
enabled
32 32 32 mA