MAX2035CCQ+TD datasheet(4/13 Pages) MAXIM

Part #	MAX2035CCQ+TD

Description	Ultrasound Variable-Gain Amplifier

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Manufacturer	MAXIM [Maxim Integrated Products]

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Ultrasound Variable-Gain Amplifier

4

_______________________________________________________________________________________

Typical Operating Characteristics

(Figure 2, VCC = VREF = 4.75V to 5.25V, VGND = 0, 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, TA = 0°C to +70°C. Typical val-

ues are at VCC = VREF = 5V, VCM = 3.0V, TA = +25°C, unless otherwise noted.)

OVERDRIVE PHASE DELAY

vs. FREQUENCY

VIN1 = 35mVP-P DIFFERENTIAL

VIN2 = 87.5mVP-P DIFFERENTIAL

GAIN = 20dB

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

2.5

5.0

7.5 10.0 12.5 15.0

FREQUENCY (MHz)

17.5 20.0

POWER-SUPPLY MODULATION RATIO

VOUT = 1.5VP-P DIFFERENTIAL

VMOD = 50mVP-P, fCARRIER = 5MHz,

GAIN = 20dB

-30

-40

-50

-60

-70

-80

-90

0

25

50

75

100 125 150

FREQUENCY (kHz)

175 200

TWO-TONE ULTRASOUND-SPECIFIC

IMD3 vs. GAIN

-30

-40

-50

-60

-70

-80

-20

-10

0

-15

-5

5

15

25

35

45

GAIN (dB)

VOUT = 1VP-P DIFFERENTIAL

GAIN = 20dB

f = 2MHz, 5MHz

f = 10MHz

Note 2: Specifications at TA = +25°C and TA = +70°C are guaranteed by production test. Specifications at TA = 0°C are guaranteed

by design and characterization.

Note 3: Noise performance of the device is dependent on the noise contribution from the supply to VREF. Use a low-noise supply for

VREF. VCC and VREF can be connected together to share the same supply voltage if the supply for VCC exhibits low noise.

Note 4: See the

Ultrasound-Specific IMD3 Specification section.

AC ELECTRICAL CHARACTERISTICS (continued)

(Figure 2, VCC = VREF = 4.75V to 5.25V, VCM = (3/5)VREF, VGND = 0, 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, TA = 0°C to +70°C. Typical

values are at VCC = VREF = 5V, TA = +25°C, unless otherwise noted.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Channel-to-Channel Crosstalk

VOUT = 1VP-P differential, fRF = 10MHz,

VG_CTL set for +20dB of gain

-80

dB

Maximum Output Voltage at

Clamp ON

VG_CLAMP_MODE = 0,

VG_CTL set for +20dB of gain,

350mVP-P differential input

2.2

VP-P

differential

Maximum Output Voltage at

Clamp OFF

VG_CLAMP_MODE = 1,

VG_CTL set for +20dB of gain,

350mVP-P differential input

3.4

VP-P

differential

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