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MAX2035CCQ+TD Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX2035CCQ+TD Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 12 page Ultrasound Variable-Gain Amplifier 4 _______________________________________________________________________________________ Typical Operating Characteristics (Figure 2, VCC = VREF = 4.75V to 5.25V, 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, 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 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 1: 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 2: 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 3: See the Ultrasound-Specific IMD3 Specification section. AC ELECTRICAL CHARACTERISTICS (continued) (Figure 2, VCC = 4.75V to 5.25V, VCM = 3/5 VCC, VREF = 5.0V, 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, TA = 0°C to +70°C. Typical values are at VCC = VREF = 5V, TA = +25°C, unless otherwise noted.) (Note 1) 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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