Datasheet

MAX2034
Quad-Channel, Ultra-Low-Noise Amplifier with
Digitally Programmable Input Impedance
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2034 Typical Application Circuit, V
CC
= +4.75V to +5.25V, source impedance R
S
= 200Ω, PD = 0, D2/D1/D0 = 0/1/0 (R
IN
= 200Ω),
signal AC-coupled to IN_, INB_ is AC grounded, V
OUT
is the differential output between OUT_+ and OUT_-, f
IN_
= 5MHz, R
L
= 200Ω
between the differential outputs, C
L
= 20pF from each output to ground, T
A
= 0°C to +70°C. Typical values are at V
CC
= 5.0V and T
A
=
+25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
R
S
= R
IN
= 50Ω
4.1
R
S
= R
IN
= 100Ω
2.9
R
S
= R
IN
= 200Ω
2.2
Noise Figure NF
R
S
= R
IN
= 1000Ω
1.4
dB
Input-Referred Noise Voltage D2 = 1 (high input impedance), f
IN_
= 5MHz
0.87
nV/√Hz
Input-Referred Noise Current D2 = 1 (high input impedance), f
IN_
= 5MHz
2.1
pA/√Hz
f
IN_
= 5MHz, V
OUT
= 1V
P-P
differential
-50 -68
Second Harmonic HD2
f
IN_
= 10MHz, V
OUT
= 1V
P-P
differential
-66
dBc
f
IN_
= 5MHz, V
OUT
= 1V
P-P
differential
-50
Third Harmonic HD3
f
IN_
= 10MHz, V
OUT
= 1V
P-P
differential
-44
dBc
4.99MHz tone relative to the second tone at
5.01MHz, which is 25dB lower than the first tone
at 5.00MHz, V
OUT
= 1V
P-P
differential
-45 -55
Two-Tone Intermodulation
Distortion (Note 2)
IMD3
7.49MHz tone relative to the second tone at
7.51MHz, which is 25dB lower than the first tone
at 7.50MHz, V
OUT
= 1V
P-P
differential
-52
dBc
Maximum Output Signal
Amplitude
Differential output
4.4
V
P-P
Gain Compression
Gain at V
IN_
= 112mV
P-P
relative to gain at
V
IN_
= 550mV
P-P
0.5
3dB
Output Common-Mode Level
2.45
V
Output Impedance Single-ended
5.3
Ω
Phase Matching Between
Channels
Phase difference between channels with V
IN_
=
195mV peak (-3dB full scale), f
IN_
= 10MHz
±1.5
deg
Channel-to-Channel Crosstalk
f
IN_
= 10MHz, V
OUT
= 1V
P-P
,
adjacent channels
50 66 dB
Switch Time from Normal to Sleep
Mode
Supply current settles to 90% of nominal sleep-
mode current I
CC,PD
0.3
ms
Switch Time from Sleep to Normal
Mode
V
OUT
settles to 90% of final 1V
P-P
output
0.3
ms
Note 1: Min and max limits at T
A
= +25°C and +70°C are guaranteed by design, characterization, and/or production test.
Note 2: See the Ultrasound-Specific IMD3 Specification in the Applications Information section.