Datasheet

MAX2078
Octal-Channel Ultrasound Front-End
with CW Doppler Mixers
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DC ELECTRICAL CHARACTERISTICS—CW MODE
( Typical Application Circuit , V
REF
= 2.475V to 2.525V, V
CC1
= 3.13V to 3.47V, V
CC2
= 4.5V to 5.25V, T
A
= 0°C to +70°C, V
GND
= 0V,
NP = 0, PD = 0, CLP = 0, V/C = 0, no RF signals applied. CI_, CQ_ pulled up to 11V through four separate 0.1% 162Ω resistors.
Typical values are at V
CC1
= 3.3V, V
CC2
= 4.75V, T
A
= +25°C, unless otherwise noted.) (Note 5)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Reference Current I
REF
82.7 µA
M i xer LV D S LO Inp ut C om m on- M od e V ol tag e V_LVDS_CM LO+ and LO- 1.25 ±0.2 V
LVDS LO Differential Input Voltage V_LVDS_DM
Common-mode input voltage
= 1.25V (Note 7)
200 700 mV
P-P
LVDS LO Input Common-Mode Current I_LVDS_CM
Current out of each pin,
V_LVDS_CM = 1.25V
130 µA
LVDS LO Differential Input Resistance R_DM_LVDS (Note 8) 4 kΩ
POWER-DOWN MODE
4.75V/5V Supply Current per Channel I_C_5V_P PD = 1 0.6 10 µA
3.3V Supply Current per Channel I_C_3_3V_P PD = 1 0.1 10 µA
LOW-POWER MODE
4.75V/5V Supply Current per Channel I_C_5V_L CLP = 1 27 30 mA
3.3V Supply Current per Channel I_C_3_3V_L CLP = 1 0.4 0.95 mA
11V Supply Current per Channel I_C_11V_L CLP = 1 6.8 8.4 mA
On-Chip Power Dissipation (All 8 Channels) PDIS_FP_TOT_L CLP = 1 1.44 1.7 W
NORMAL POWER MODE
4.75V/5V Supply Current per Channel I_C_5V_N 31 34 mA
3.3V Supply Current per Channel I_C_3_3V_N 0.4 0.95 mA
11V Supply Current per Channel I_C_11V_N 11.3 13 mA
On-Chip Power Dissipation (All 8 Channels) PDIS_FP_TOT_N (Note 9) 1.87 2.2 W
DC ELECTRICAL CHARACTERISTICS—VGA MODE (continued)
( Typical Application Circuit , V
REF
= 2.475V to 2.525V, V
CC1
= 3.13V to 3.47V, V
CC2
= 4.5V to 5.25V, T
A
= 0°C to +70°C, V
GND
= 0V,
NP = 0, V/C = 1, CLP = 0, PD = 0, no RF signals applied. Typical values are at V
CC1
= 3.3V, V
CC2
= 4.75V, T
A
= +25°C, unless other-
wise noted.) (Note 5)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
3V Power-Down Current I_PD_3V_TOT PD = V
CC1
, all channels 0.3 10 µA
3V Supply Current per Channel I_3V_NM Total I divided by 8, VG+ - VG- = -2V 11 16 mA
4.75V/5V Supply Current per Channel I_5V_NM Total I divided by 8 6.0 8.3 mA
DC Power per Channel P_NM 64.8 92.3 mW
Differential Analog Control Voltage
Range
VGAIN_RANG VG+ - VG- ±3 V
Common-Mode Voltage for
Difference Analog Control
VGAIN_COMM (VG+ + VG-)/2
1.65
±5%
V
Source/Sink Current for Gain Control
Pins
I_ACONTROL Per pin ±1.6 ±2.3 µA
Reference Voltage Input V
REF
2.475 2.525 V
Reference Current I
REF
All channels 9.7 13 µA
Output Common-Mode Level V
CMO
1.73 V