MAX2077CTN Ver la hoja de datos (PDF) - Maxim Integrated

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MAX2077CTN

Octal-Channel Ultrasound Front-End

Maxim Integrated 

Octal-Channel Ultrasound Front-End

Typical Operating Characteristics (continued)

(Typical Application Circuits, VREF = 2.475V to 2.525V, VCC1 = 3.3V, VCC2 = 4.75V, TA = +25°C, VGND = 0V, NP = 0, PD = 0,

D3/D2/D1/D0 = 1/0/1/0 (RIN = 200Ω, LNA gain = 18.5dB), D5/D4 = 1/1(fC = 18MHz), fRF = 5MHz, RS = 200Ω, capacitance to GND

at each of the VGA differential outputs is 25pF, differential capacitance across VGA outputs is 15pF, RL = 1kΩ differential, reference

noise less than 10nV/√Hz from 1kHz to 20MHz, DOUT loaded with 10MΩ and 60pF, unless otherwise noted.)

LNA OVERLOAD RECOVERY TIME

(VIN = 500mVP-P FOR 0.5µs TO 100mVP-P

FOR 1µs AND BACK TO 500mVP-P

FOR 0.5µs, GAIN =10dB)

1.25

0.5 MAX2077 toc19

INPUT

0.75

0

0.25

-0.5

-0.25

-0.75

0

-1.0

OUTPUT

500

1000

1500

TIME (ns)

-1.5

2000

VGA OVERLOAD RECOVERY TIME

(VIN = 40mVP-P FOR 1µs TO 4mVP-P

FOR 1µs AND BACK TO 40mVP-P

FOR 1µs, GAIN = 42.5dB)

3

MAX2077 toc20 0.05

INPUT

2

0

1

-0.05

0

-0.10

-1

OUTPUT

-2

-0.15

0

500

1000

1500

2000

TIME (ns)

OVERDRIVE PHASE DELAY

vs. FREQUENCY

45

MAX2077 toc21

INPUT = 300mVP-P

36

27

18

INPUT = 30mVP-P

9

GAIN = 10dB

0

0

5

10

15

20

FREQUENCY (MHz)

_______________________________________________________________________________________ 9

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