MAX2038CCQ-D(2009) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX2038CCQ-D
(Rev.:2009)

Ultrasound VGA Integrated with CW Octal Mixer

Maxim Integrated 

Ultrasound VGA Integrated

with CW Octal Mixer

AC ELECTRICAL CHARACTERISTICS—VGA MODE

(Typical Application Circuit, Figure 7. VCC = VREF = 4.75V to 5.25V, VCM = (3/5)VREF, TA = 0°C to +70°C, VGND = 0, LOW_PWR = 0,

M4_EN = 0, CW_FILTER = 1, TMODE = 0, PD = 0, CW_VG = 1, CW_M1 = 0, CW_M2 = 0, VG_CLAMP_MODE = 1, fRF = fLO/16 =

5MHz, capacitance to GND at each of the VGA differential outputs is 60pF, differential capacitance across the VGA outputs is 10pF,

RL = 1kΩ, CW mixer outputs pulled up to +11V through four separate ±0.1% 115Ω resistors, differential mixer inputs are driven from

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

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Mode Select Response Time

CW_VG set from logic 1 to 0 or from 0 to 1

2

µs

(Note 9)

VGA MODE

Full-Scale Bandwidth

Differential output

capacitance is 10pF,

VOUT = 1.5VP-P,

capacitance to GND

at each single-ended

18

f-1.3dB 1.3dB bandwidth, output is 60pF,

MHz

gain = 10dB

RL = 1kΩ

Small-Signal Bandwidth

Differential Input Resistance

Input Effective Capacitance

Differential Output Resistance

Maximum Gain

Minimum Gain

Gain Range

Absolute Gain Error

VGA Gain Response Time

f-1.3dB

RIN

CIN

ROUT

No capacitive load

RL = 1kΩ

VOUT = 1.5mVP-P, 3dB bandwidth,

gain = 10dB

fRF = 10MHz, each input to ground

TA = +25°C, full gain range 0% to 100%,

VREF = 5V

40dB gain change to within 1dB final value

29

30

170

200

230

15

100

+29.5

-12.5

42

±0.25 ±1.5

1

MHz

Ω

pF

Ω

dB

dB

dB

dB

µs

Input-Referred Noise

Output-Referred Noise

VG_CTL set for maximum gain,

no input signal

VG_CTL set for

+10dB of gain

No input signal

VOUT = 1.5VP-P, 1kHz

offset

2

nV/√Hz

22

nV/√Hz

55

Second Harmonic

VG_CLAMP_MODE = 1, VG_CTL set for

+10dB of gain, fRF = 5MHz, VOUT = 1.5VP-P

-70

HD2

dBc

VG_CLAMP_MODE = 1, VG_CTL set for

+10dB of gain, fRF = 10MHz, VOUT = 1.5VP-P

-55

-65

Third-Order Intermodulation

Distortion

IMD3

VG_CLT set for +10dB of gain, fRF1 = 5MHz,

fRF2 = 5.01MHz, VOUT = 1.5VP-P,

VREF = 5V (Note 3)

-40

-52

dBc

Channel-to-Channel Crosstalk

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

VG_CTL set for +10dB of gain

-80

dB

Maximum Output Voltage at

ClampON

VG_CLAMP_MODE = 0, VG_CTL set for

+20dB of gain, 350mVP-P differential input

2.4

VP-P

differential

4 _______________________________________________________________________________________

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