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MAX19793 Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX19793 Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 23 page 6 Maxim Integrated MAX19793 1500MHz to 6000MHz Dual Analog Voltage Variable Attenuator with On-Chip 10-Bit SPI-Controlled DAC 5V AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, one attenuator, VCC = 4.75V to 5.25V, RF ports are driven from 50I sources and loaded into 50I, input PRF = 0dBm, fRF = 3500MHz, VCTRL = 1V to 4V, VDAC_LOGIC = 0V, RDBK_EN (D9, REG3) = logic 0, TC = -40NC to +100NC. Typical values are for TC = +25NC, VCC = 5V, input PRF = 0dBm, fRF = 3500MHz, VCTRL = 1V, VDAC_LOGIC = 0V, RDBK_EN (D9, REG3) = logic 0, unless otherwise noted.) (Notes 5, 7) Note 5: Production tested at TC = +100NC. All other temperatures are guaranteed by design and characterization. Note 6: Recommended functional range. Not production tested. Operation outside this range is possible, but with degraded performance of some parameters. Note 7: All limits include external component losses, connectors and PCB traces. Output measurements taken at the RF port of the Typical Application Circuit. Note 8: fRF1 = 3501MHz, fRF2 = 3500MHz, PRF = 0dBm/tone applied to attenuator input. Note 9: Switching time measured from 50% of the CTRL signal to when the RF output settles to Q1dB (R3 = 0I). Note 10: Switching time measured from when CS is asserted to when the RF output settles to Q1dB. Note 11: Switching time measured from when MODE is asserted to when the RF output settles to Q1dB. Note 12: Typical minimum time for proper SPI operation. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CTRL Switching Time (Note 9) 13dB to 0dB range 350 ns 0dB to 13dB range 730 CS Switching Time (Note 10) 14dB to 0dB range 675 ns 0dB to 14dB range 2300 MODE Switching Time (Note 11) 15dB to 0dB range (MODE 1 to 0) 700 ns 0dB to 15dB range (MODE 0 to 1) 2650 Input Return Loss 19 dB Output Return Loss 17 dB Group Delay Input/output 50I lines deembedded 200 ps Group Delay Flatness Over 125MHz Band Peak to peak 20 ps Group Delay Change VCTRL = 1V to 4V -120 ps Insertion Phase Change vs. Attenuation Control VCTRL = 1V to 4V 28 Degrees S21 Attenuation Deviation from a Straight Line VCTRL = 1.4V to 3.1V ±0.4 dB SERIAL PERIPHERAL INTERFACE (SPI) Maximum Clock Speed 20 MHz Data-to-Clock Setup Time tCS (Note 12) 2 ns Data-to-Clock Hold Time tCH (Note 12) 2.5 ns CS-to-CLK Setup Time tEWS (Note 12) 3 ns CS Positive Pulse Width tEW (Note 12) 7 ns Clock Pulse Width tCW (Note 12) 5 ns |
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