MAX2037 データシートの表示（PDF） - Maxim Integrated

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MAX2037

Ultrasound Variable-Gain Amplifier

Maxim Integrated 

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

Differential output

capacitance is 10pF,

VOUT = 1.5VP-P, capacitance to GND at

18

f-1.3dB

1.3dB

bandwidth, gain

= 10dB

each single-ended

output is 60pF, RL = 1kΩ

No capacitive load

RL = 1kΩ

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

Ω

15

pF

100

Ω

+29.5

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

dB

±0.25 ±1.0

dB

1

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

dBc

-55

-65

Third-Order Intermodulation

IMD3 VG_CLT set for +10dB of gain, fRF1 = 5MHz, -40

-52

dB

Distortion

fRF2 = 5.01MHz, VOUT = 1.5VP-P (Note 3)

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