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MAX2037 PDF даташит

Спецификация MAX2037 изготовлена ​​​​«Maxim Integrated Products» и имеет функцию, называемую «Ultrasound Variable Gain Amplifier».

Детали детали

Номер произв MAX2037
Описание Ultrasound Variable Gain Amplifier
Производители Maxim Integrated Products
логотип Maxim Integrated Products логотип 

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MAX2037 Даташит, Описание, Даташиты
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19-0586; Rev 0; 10/06
EVAALVUAAILTAIOBNLEKIT
Ultrasound Variable-Gain Amplifier
General Description
The MAX2037 8-channel variable-gain amplifier (VGA)
is designed for high linearity, high dynamic range, and
low-noise performance targeting ultrasound imaging
and Doppler applications. Each amplifier features dif-
ferential inputs and outputs and a total gain range of
typically 42dB. In addition, the VGAs offer very low out-
put-referred noise performance suitable for interfacing
with 12-bit ADCs.
The MAX2037 VGA is optimized for less than ±0.25dB
absolute gain error to ensure minimal channel-to-chan-
nel ultrasound beamforming focus error. The device’s
differential outputs are designed to directly drive ultra-
sound ADCs through an external passive anti-aliasing
filter. A switchable clamp is also provided at each ampli-
fier’s outputs to limit the output signals, thereby prevent-
ing ADC overdrive or saturation.
Dynamic performance of the device is optimized to
reduce distortion to support second-harmonic imaging.
The device achieves a second-harmonic distortion
specification of -70dBc at VOUT = 1.5VP-P and fIN =
5MHz, and an ultrasound-specific* two-tone third-order
intermodulation distortion specification of -52dBc at
VOUT = 1.5VP-P and fIN = 5MHz.
The MAX2037 operates from a +5.0V power supply,
consuming only 120mW/channel. The device is avail-
able in a 100-pin TQFP package with an exposed pad-
dle. Electrical performance is guaranteed over a 0°C to
+70°C temperature range.
Applications
Ultrasound Imaging
Sonar
Features
8-Channel Configuration
High Integration for Ultrasound Imaging
Applications
Pin Compatible with the MAX2038 Ultrasound
VGA Plus CW Doppler Beamformer
Maximum Gain, Gain Range, and Output-Referred
Noise Optimized for Interfacing with 12-Bit ADCs
Maximum Gain of 29.5dB
Total Gain Range of 42dB
22nV/Hz Ultra-Low Output-Referred Noise at
5MHz
Pin-for-Pin 10-Bit Compatibility Supported By
MAX2035/MAX2036
±0.25dB Absolute Gain Error
Switchable Output VGA Clamp Eliminating ADC
Overdrive
Fully Differential VGA Outputs for Direct ADC
Drive
Variable Gain Range Achieves 42dB Dynamic
Range
-70dBc HD2 at VOUT = 1.5VP-P and fIN = 5MHz
Two-Tone Ultrasound-Specific* IMD3 of -52dBc at
VOUT = 1.5VP-P and fIN = 5MHz
120mW Consumption Per Channel
*See the Ultrasound-Specific IMD3 Specification in the
Applications Information section.
VG_CTL+
VG_CTL-
VG_IN1+
VG_IN1-
VG_IN8+
VG_IN8-
PD
Functional Diagram
VCC VREF
MAX2037
-12.5dB TO +29.5dB
50Ω
VGA
50Ω
•• •
•• •
•• •
50Ω
VGA
50Ω
BIAS
CIRCUITRY
VG_CLAMP_MODE
VG_OUT1+
VG_OUT1-
VG_OUT8+
VG_OUT8-
GND EXT_RES
Ordering Information
PART
TEMP
RANGE
PIN-PACKAGE PKG
CODE
MAX2037CCQ-D
0°C to +70°C
100 TQFP-EP
(14mm x 14mm)
C100E-3
MAX2037CCQ-TD 0°C to +70°C 100 TQFP-EPC100E-3
(14mm x 14mm)
MAX2037CCQ+D 0°C to +70°C 100 TQFP-EPC100E-3
(14mm x 14mm)
MAX2037CCQ+TD 0°C to +70°C 100 TQFP-EPC100E-3
(14mm x 14mm)
EP = Exposed paddle.
+Denotes lead-free package.
T = Tape-and-reel package.
D = Dry packing.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.









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MAX2037 Даташит, Описание, Даташиты
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Ultrasound Variable-Gain Amplifier
ABSOLUTE MAXIMUM RATINGS
VCC, VREF to GND .................................................-0.3V to +5.5V
Any Other Pins to GND...............................-0.3V to (VCC + 0.3V)
VGA Differential Input Voltage (VGIN_+ - VGIN_-)...........8.0VP-P
Analog Gain-Control Input Differential Voltage
(VG_CTL+ - VG_CTL-)...................................................8.0VP-P
Continuous Power Dissipation (TA = +70°C)
100-Pin TQFP
(derated 45.5mW/°C above +70°C).........................3636.4mW
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
θJC ...................................................................................+2°C/W
θJA .................................................................................+22°C/W
Storage Temperature Range .............................-40°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(Figure 2, VCC = VREF = 4.75V to 5.25V, TA = 0°C to +70°C, GND = 0V, PD = 0, no RF signals applied, capacitance to GND at each
of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, RL = 1kΩ. Typical values are at VCC
= VREF = 5V, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage Range
VCC External Reference Voltage
Range
Total Power Supply Current
VCC Supply Current
VREF Current
Current Consumption per
Amplifier Channel
Differential Analog Control
Voltage Range
Differential Analog Control
Common-Mode Voltage
Analog Control Input Source/Sink
Current
LOGIC INPUTS
CMOS Input High Voltage
CMOS Input Low Voltage
SYMBOL
VCC
CONDTIONS
VREF (Note 2)
IVCC
IREF
Refers to VCC supply
current plus VREF current
PD = 0
PD =1
Refers to VCC supply current
Minimum gain
Maximum gain
VCM
VIH
VIL
MIN TYP MAX UNITS
4.75 5 5.25
V
4.75 5 5.25
V
204 231
27 33
192 216
12 15
mA
mA
mA
24 27 mA
+2
-2 VP-P
2.85 3.0 3.15
V
4.5 5
mA
2.0 V
0.8 V
2 _______________________________________________________________________________________









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MAX2037 Даташит, Описание, Даташиты
www.DataSheet4U.com
Ultrasound Variable-Gain Amplifier
AC ELECTRICAL CHARACTERISTICS
(Figure 2, VCC = VREF = 4.75V to 5.25V, VCM = 2.85V to 3.15V, TA = 0°C to +70°C, GND = 0V, PD = 0, VG_CLAMP_MODE = 1, fRF =
5MHz, capacitance to GND at each of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF,
RL = 1kΩ. Typical values are at VCC = VREF = 5V, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Full-Scale Bandwidth
f-1.3dB
VOUT = 1.5VP-P,
1.3dB
bandwidth, gain
= 10dB
Differential output
capacitance is 10pF,
capacitance to GND at
each single-ended
output is 60pF, RL = 1kΩ
No capacitive load
RL = 1kΩ
18
29
MHz
Small Signal Bandwidth
f-1.3dB
VOUT = 1.5mVP-P, 3dB bandwidth,
gain = 10dB
30 MHz
Differential Input Resistance
Input Effective Capacitance
Differential Output Resistance
Maximum Gain
RIN
CIN
ROUT
fRF = 10MHz, each input to ground
170 200 230
15
100
+29.5
Ω
pF
Ω
dB
Minimum Gain
-12.5
dB
Gain Range
Absolute Gain Error
VGA Gain Response Time
TA = +25°C, full gain range 0% to 100%
40dB gain change to within 1dB final value
42
±0.25
1
±1.0
dB
dB
µs
Input-Referred Noise
VG_CTL set for maximum gain,
no input signal
2 nV/Hz
Output-Referred Noise
VG_CTL set for
+10dB of gain
No input signal
VOUT = 1.5VP-P,
1kHz offset
22
nV/Hz
55
Second Harmonic
HD2
VG_CLAMP_MODE = 1,
VG_CTL set for +10dB of gain,
fRF = 5MHz, VOUT = 1.5VP-P
VG_CLAMP_MODE = 1,
VG_CTL set for +10dB of gain,
fRF = 10MHz, VOUT = 1.5VP-P
-70
-55 -65
dBc
Third-Order Intermodulation
Distortion
IMD3
VG_CLT set for +10dB of gain, fRF1 = 5MHz,
fRF2 = 5.01MHz, VOUT = 1.5VP-P (Note 3)
-40
-52
dB
_______________________________________________________________________________________ 3










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