MAX2036CCQ+T Maxim Integrated Products, MAX2036CCQ+T Datasheet - Page 15

• Manufacturer Part Number: MAX2036CCQ+T
• Description: IC VGA W/OCTAL MIXER 8CH 100TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX2036CCQ+T

• Amplifier Type: Variable Gain
• Number Of Circuits: 8
• Output Type: Differential
• -3db Bandwidth: 2MHz
• Current - Supply: 245mA
• Current - Output / Channel: 3.75mA
• Voltage - Supply, Single/dual (±): 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Slew Rate: -
• Gain Bandwidth Product: -
• Current - Input Bias: -
• Voltage - Input Offset: -

A clamp is provided to limit the VGA output signals to
avoid overdriving the ADC or to prevent ADC saturation.
Set VG_CLAMP_MODE low to clamp the VGA differential
outputs at 2.2V
disable the clamp.
The device can also be powered down with PD. Set PD
to logic-high for power-down mode. In power-down
mode, the device draws a total supply current of 27mA.
Set PD to a logic-low for normal operation
The device is also optimized for quick overload recov-
ery for operation under the large input-signal conditions
that are typically found in ultrasound input buffer
imaging applications. See the Typical Operating
Characteristics for an illustration of the rapid recovery
time from a transmit-related overload.
LO_LVDS+
LO_LVDS-
P-P
CWIN8
CWIN2
CWIN1
LOAD
• •
•
______________________________________________________________________________________
CLK
DIN
. Set the VG_CLAMP_MODE high to
CHANNEL 1
SELECTOR
5
DIVIDER
Overload Recovery
PHASE
CW_M1
5-BIT
I Q
SR
I/Q
V
CC
• •
•
Power-Down
CHANNEL 2
SELECTOR
5
DIVIDER
VGA Clamp
PHASE
5-BIT
CW_M2
I Q
SR
I/Q
V
REF
CW_IOUT2+
CW_QOUT2-
Ultrasound VGA Integrated
High-Level CW Mixer and Programmable
GND
CW_FILTER
The MAX2036 CW mixers are designed using an active
double-balanced topology. The mixers achieve high
dynamic range and high-linearity performance, with
exceptionally low noise, which is ideal for ultrasound
CWD signal reception. The octal quadrature mixer
array provides noise performance of -155dBc/Hz at
1kHz from a 1.25MHz carrier, and a two-tone, third-
order, ultrasound-specific intermodulation product of
typically -50dBc. See the Ultrasound-Specific IMD3
Specification in the Applications Information section .
The octal array exhibits quadrature and in-phase differ-
ential current outputs (CW_QOUT+, CW_QOUT-,
CW_IOUT+, CW_IOUT-) to produce the total CWD
beamformed signal. The maximum differential current
output is typically 3mA
ance voltage ranges from 4.75V to 12V.
Beamformer Functional Diagram
LOW_PWR
with CW Octal Mixer
Octal Continuous Wave (CW) Mixer
M4_EN
PD
I Q
CHANNEL 8
SELECTOR
5
DIVIDER
PHASE
5-BIT
SR
I/Q
MAX2036
P-P
and the mixer output-compli-
LO1
LO2
LO8
DOUT
CW_IOUT+
CW_IOUT-
CW_QOUT-
CW_QOUT+
• •
•
15