max2078ctk Maxim Integrated Products, Inc., max2078ctk Datasheet - Page 4

• Manufacturer Part Number: max2078ctk
• Description: Octal-channel Ultrasound Front-end With Cw Doppler Mixers
• Manufacturer: Maxim Integrated Products, Inc.

Octal-Channel Ultrasound Front-End
with CW Doppler Mixers
AC ELECTRICAL CHARACTERISTICS
( Typical Application Circuit , V
NP = 0, PD = 0, D43/D42/D41/D40 = 1/0/1/0 (R
capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, R
differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at V
= 3.3V, V
AC ELECTRICAL CHARACTERISTICS—VGA MODE
( Typical Application Circuit , V
V/C = 1, NP = 0, PD = 0, D43/D42/D41/D40 = 1/0/1/0 (R
capacitance to GND at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, R
differential, reference noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF. Typical values are at V
= 3.3V, V
4
Mode Select Response Time
(Note 7)
High Gain Maximum Input-
Voltage Range
Low Gain Maximum Input-Voltage
Range
Input Impedance
Noise Figure
Low-Gain Noise Figure
Input-Referred Noise Voltage
Input-Referred Noise Current
M axi m um Gai n, H i g h G ai n S etti ng
Minimum Gain, High Gain Setting
Maximum Gain, Low Gain Setting
Minimum Gain, Low Gain Setting
Anti-Aliasing Filter 3dB Corner
Frequency
Gain Range
_______________________________________________________________________________________
CC
CC
PARAMETER
PARAMETER
2 = 4.75V, T
2 = 4.75V, T
A
A
= +25°C, unless otherwise noted.) (Note 2)
= +25°C, unless otherwise noted.) (Note 2)
REF
REF
= 2.475V to 2.525V, V
= 2.475V to 2.525V, V
V/C stepped from 0 to 1, DC stable within 10%
V/C stepped from 1 to 0, DC stable within 10%
High LNA gain D43/D42/D41/D40 = 1/0/1/0
Low LNA gain D43/D42/D41/D40 = 0/0/0/1
D42/D41/D40 = 0/0/0, R
D42/D41/D40 = 0/0/1, R
D42/D41/D40 = 0/1/0, R
D42/D41/D40 = 0/1/1, R
R
R
R
R
D43/D42/D41/D40 = 0/0/0/1, LNA gain = 12.5dB,
R
D43/D42/D41/D40 = 1/1/1/0
D43/D42/D41/D40 = 1/1/1/0
VG+ - VG- = +3V
VG+ - VG- = -3V
D43/D42/D41/D40 = 0/0/0/1, VG+ - VG- = +3V
D43/D42/D41/D40 = 0/0/0/1, VG+ - VG- = -3V
D45/D44 = 0/0, f
D45/D44 = 0/1, f
D45/D44 = 1/0, f
D45/D44 = 1/1, f
VG+ - VG- = -3V to +3V
S
S
S
S
S
= R
= R
= R
= R
= R
IN
IN
IN
IN
IN
= 50Ω, VG+ - VG- = +3V
=100Ω, VG+ - VG- = +3V
= 200Ω, VG+ - VG- = +3V
= 1000Ω, VG+ - VG- = +3V
= 200Ω, VG+ - VG- = +3V
IN
= 200Ω, LNA gain = 18.5dB, D45/D44 = 1/1 (f
C
C
C
C
= 9MHz
= 10MHz
= 15MHz
= 18MHz
CC
CONDITIONS
CC
IN
CONDITIONS
1 = 3.13V to 3.47V, V
1 = 3.13V to 3.47V, V
= 200Ω, LNA gain = 18.5dB), D45/D44 = 1/1 (f
IN
IN
IN
IN
= 50Ω
= 100Ω
= 200Ω
= 1000Ω, f
RF
= 2MHz
CC
CC
2 = 4.5V to 5.25V, T
2 = 4.5V to 5.25V, T
MIN
MIN
47.5
185
700
C
8.5
2.5
90
41
35
= 18MHz), f
TYP
0.33
A
A
0.6
1
1
= 0°C to +70°C, V
= 0°C to +70°C, V
TYP
42.8
36.8
100
200
830
2.1
C
4.5
3.4
2.4
2.1
3.9
0.9
50
10
10
15
18
33
4
9
= 18MHz), f
MAX
RF
= f
MAX
1000
110
210
60
45
11
38
6
LO
/16 = 5MHz,
differential
differential
RF
GND
UNITS
GND
V
V
pA/√Hz
= 5MHz,
nV/√Hz
UNITS
L
µs
L
P-P
P-P
MHz
dB
dB
dB
dB
dB
dB
dB
= 1kΩ
= 1kΩ
Ω
= 0V,
= 0V,
CC
CC
1
1