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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC6948 датащи(PDF) 4 Page - Analog Devices |
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LTC6948 датащи(HTML) 4 Page - Analog Devices |
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4 / 38 page  LTC6948 4 6948fa For more information www.linear.com/LTC6948 elecTrical characTerisTics SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCLMP-LO Low Clamp Voltage CPCLO = 1 0.84 V VCLMP-HI High Clamp Voltage CPCHI = 1, Referred to VCP+ –0.96 V VMID Mid-Supply Output Bias Ratio Referred to (VCP+ – GND) 0.48 V/V Reference (R) Divider R Divide Range All Integers Included l 1 31 Counts VCO (N) Divider N Divide Range All Integers Included, Integer Mode All Integers Included, Fractional Mode l l 32 35 1023 1019 Counts Counts Fractional ∆∑ Modulator Numerator Range All Integers Included l 1 262143 Counts Modulator LDO Output Voltage LDO Enabled, Four Values LDO Disabled 1.7 to 2.6 VD+ V V External Pin Capacitance Required for LDO Stability l 0.047 0.1 1 µF Digital Pin Specifications VIH High Level Input Voltage MUTE, CS, SDI, SCLK l 1.55 V VIL Low Level Input Voltage MUTE, CS, SDI, SCLK l 0.8 V VIHYS Input Voltage Hysteresis MUTE, CS, SDI, SCLK 250 mV Input Current MUTE, CS, SDI, SCLK l ±1 µA IOH High Level Output Current SDO and STAT, VOH = VD+ – 400mV l –3.3 –1.9 mA IOL Low Level Output Current SDO and STAT, VOL = 400mV l 2.0 3.4 mA SDO Hi-Z Current l ±1 µA Digital Timing Specifications (See Figure 6 and Figure 7) tCKH SCLK High Time l 25 ns tCKL SCLK Low Time l 25 ns tCSS CS Setup Time l 10 ns tCSH CS High Time l 10 ns tCS SDI to SCLK Setup Time l 6 ns tCH SDI to SCLK Hold Time l 6 ns tDO SCLK to SDO Time To VIH/VIL/Hi-Z with 30pF Load l 16 ns Power Supply Voltages VREF+ Supply Range l 3.15 3.3 3.45 V VD+ Supply Range l 3.15 3.3 3.45 V VRF+ Supply Range l 3.15 3.3 3.45 V VVCO+ Supply Range l 4.75 5.0 5.25 V VCP+ Supply Range l 4.0 5.25 V Power Supply Currents IDD VD+ Supply Current Digital Inputs at Supply Levels, Integer Mode Digital Inputs at Supply Levels, Fractional Mode, fPFD = 66.3MHz, LDOV[1:0] = 3 l l 18.2 1500 22 µA mA ICC(5V) Sum VCP+, VVCO+ Supply Currents ICP = 11.2mA ICP = 1.0mA PDALL = 1 l l l 48 26 450 60 35 1000 mA mA µA The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VREF+ = VD+ = VRF+ = 3.3V, VCP+ = VVCO+ = 5V unless otherwise specified (Note 2). All voltages are with respect to GND. |
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