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Typical operating characteristics – Rainbow Electronics MAX2036 User Manual

Page 7

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MAX2036

Ultrasound VGA Integrated

with CW Octal Mixer

_______________________________________________________________________________________

7

Typical Operating Characteristics

(Figure 7, V

CC

= V

REF

= 4.75V to 5.25V, V

GND

= 0, PD = 0, VG_CLAMP_MODE = 1, f

RF

= 5MHz, capacitance to GND at each of the

VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF, R

L

= 1kΩ, T

A

= 0°C to +70°C. Typical val-

ues are at V

CC

= V

REF

= 5V, V

CM

= 3.0V, T

A

= +25°C, unless otherwise noted.)

OVERDRIVE PHASE DELAY

vs. FREQUENCY

MAX2036 toc01

V

IN1

= 35mV

P-P

DIFFERENTIAL

V

IN2

= 87.5mV

P-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

0

2.5

5.0

7.5 10.0 12.5 15.0

OVERDRIVE PHASE DELAY (ns)

FREQUENCY (MHz)

17.5 20.0

POWER-SUPPLY MODULATION RATIO

MAX2036 toc02

V

OUT

= 1.5V

P-P

DIFFERENTIAL

V

MOD

= 50mV

P-P

, f

CARRIER

= 5MHz,

GAIN = 20dB

-30

-40

-50

-60

-70

-80

-90

0

25

50

75

100 125 150

PSMR (dBc)

FREQUENCY (kHz)

175 200

TWO-TONE ULTRASOUND-SPECIFIC

IMD3 vs. GAIN

MAX2036 toc03

-30

-40

-50

-60

-70

-80

-20

-10

0

-15

-5

5

15

25

35

45

IMD3 (dBc)

GAIN (dB)

V

OUT

= 1V

P-P

DIFFERENTIAL

GAIN = 20dB

f

= 2MHz, 5MHz

f

= 10MHz

OVERLOAD RECOVERY TIME

MAX2036 toc07

OUTPUT OVERLOAD TO 100mV

P-P

f = 5MHz

DIFFERENTIAL
INPUT
200mV/div

DIFFERENTIAL
OUTPUT
500mV/div

SECOND-HARMONIC DISTORTION

vs. GAIN

MAX2036 toc04

-30

-40

-50

-60

-70

-100

-90

-80

-20

-10

0

-15

-5

5

15

25

35

45

HD2 (dBc)

GAIN (dB)

f

= 2MHz

V

OUT

= 1V

P-P

DIFFERENTIAL

f

= 5MHz

f

= 12MHz

THIRD-HARMONIC DISTORTION

vs. GAIN

MAX2036 toc05

-30

-40

-50

-60

-70

-100

-90

-80

-20

-10

0

-15

-5

5

15

25

35

45

HD3 (dBc)

GAIN (dB)

V

OUT

= 1V

P-P

DIFFERENTIAL

f

= 12MHz

f

= 5MHz

f

= 2MHz

OVERLOAD RECOVERY TIME

MAX2036 toc06

OUTPUT OVERLOAD TO 1V

P-P

f = 5MHz

DIFFERENTIAL
INPUT
200mV/div

DIFFERENTIAL
OUTPUT
500mV/div