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MAX2820EGM-TD Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX2820EGM-TD Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 23 page 2.4GHz 802.11b Zero-IF Transceivers _______________________________________________________________________________________ 5 AC ELECTRICAL CHARACTERISTICS—TRANSMIT MODE (continued) (MAX2820/MAX2821 EV kit: VCC = +2.7V to +3.6V, fRF and fLO = 2400MHz to 2499MHz, fOSC = 22MHz or 44MHz, transmit baseband inputs = 400mVP-P, SHDNB = TX_ON = VIH, RX_ON = VIL, CSB = VIH, 0V ≤ VTX_GC ≤ +2.0V, RBIAS = 12kΩ, ICP = +2mA, BWPLL = 45kHz, differential RF output matched to 50 Ω through a balun, baseband input biased at +1.2V, registers set to default power-up set- tings, TA = +25 °C, unless otherwise noted. Typical values are at VCC = +2.7V, fLO = 2437MHz, fOSC = 22MHz, unless otherwise noted.) AC ELECTRICAL CHARACTERISTICS—PA BIAS (MAX2820/MAX2821 EV kit: VCC = +2.7V to +3.6V, SHDNB = VIH, TX_ON = VIH, CSB = VIH, PA_BIAS enabled, RBIAS = 12k Ω, regis- ters set to default power-up settings, TA = +25 °C, unless otherwise noted. Typical values are at VCC = +2.7V, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS TA = +25 °C-1 +3 TX RF Output Power VIN = 400mVP-P at 5.5MHz, VTX_GC = 0V, I/Q CW signal (Note 7) TA = -40°C to +85°C -2 dBm -22MHz ≤ fOFFSET ≤ -11MHz, 11MHz ≤ fOFFSET ≤ 22MHz -37 TX RF ACPR (Note 8) -33MHz ≤ fOFFSET < -22MHz, 22MHz < fOFFSET ≤ 33MHz -59 dBc Unwanted sideband -40 LO signal -30 In-Band Spurious Signals Relative to Modulated Carrier fRF = 2400MHz to 2483MHz Spurs > ±22MHz -80 dBc 2 × fLO -40 TX RF Harmonics 3 × fLO -55 dBm fRF < 2400MHz -60 fRF = 2500MHz to 3350MHz -43 TX RF Spurious Signal Emissions (Outside 2400MHz to 2483.5MHz) Nonharmonic Signals fRF > 3350MHz -45 dBm TX RF Output Noise fOFFSET ≥ 22MHz, 0V ≤ VTX_GC ≤ +2.0V -135 dBm/Hz TX RF Output Return Loss With external match 15 dB TX BASEBAND FILTER RESPONSE -3dB Frequency 10 MHz At 22MHz 25 Attenuation Relative to Passband At 44MHz 50 dB TX GAIN-CONTROL CHARACTERISTICS Gain-Control Range 0V ≤ VTX_GC ≤ +2.0V 30 dB Gain-Control Slope Peak gain slope 40 dB/V Gain-Control Response Time VTX_GC = +2.0V to 0V step 0.3 µs PARAMETER CONDITIONS MIN TYP MAX UNITS Resolution 4 Bits Full-Scale Output Current 300 µA LSB Size 20 µA Output Voltage Compliance Range (Note 11) 1.0 1.2 1.3 V Settling Time Relative to rising edge of CSB, zero to full- scale step 0000 → 1111, settle to 1/2 LSB, 2pF load 1µs |
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