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AD8322ARU-REEL 데이터시트(PDF) 3 Page - Analog Devices |
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AD8322ARU-REEL 데이터시트(HTML) 3 Page - Analog Devices |
3 / 16 page REV. 0 AD8322 –3– LOGIC INPUTS (TTL/CMOS Compatible Logic) Parameter Min Typ Max Unit Logic “1” Voltage 2.1 5.0 V Logic “0” Voltage 0 0.8 V Logic “1” Current (VINH = 5 V) CLK, SDATA, DATEN 020 nA Logic “0” Current (VINL = 0 V) CLK, SDATA, DATEN –600 –100 nA Logic “1” Current (VINH = 5 V) PD 50 190 µA Logic “0” Current (VINL = 0 V) PD –250 –30 µA TIMING REQUIREMENTS Parameter Min Typ Max Unit Clock Pulsewidth (TWH) 16.0 ns Clock Period (TC) 32.0 ns Setup Time SDATA vs. Clock (TDS) 5.0 ns Setup Time DATEN vs. Clock (T ES) 15.0 ns Hold Time SDATA vs. Clock (TDH) 5.0 ns Hold Time DATEN vs. Clock (T EH) 3.0 ns Input Rise and Fall Times, SDATA, DATEN, Clock (T R, TF)10 ns (Full Temperature Range, VCC = 5 V, TR = TF = 4 ns, fCLK = 8 MHz unless otherwise noted.) ( DATEN, CLK, SDATA, PD, V CC = 5 V: Full Temperature Range) TES VALID DATA WORD G1 MSB. . . .LSB GAIN TRANSFER (G1) TDS TEH 8 CLOCK CYCLES GAIN TRANSFER (G2) TOFF TGS ANALOG OUTPUT SIGNAL AMPLITUDE (p-p) PD PEDESTAL CLK SDATA DATEN TON TC TWH VALID DATA WORD G2 Figure 2. Serial Interface Timing VALID DATA BIT MSB MSB-1 MSB-2 TDS TDH SDATA CLK Figure 3. SDATA Timing Table I. Gain vs. Gain Code Decimal 8-Bit SPI Data Word Gain Code MSB LSB Nominal Gain (dB) 1 0 0000 001 –12.64 2 0 0000 010 –6.62 4 0 0000 100 –0.60 8 0 0001 000 5.42 16 0 0010 000 11.44 32 0 0100 000 17.46 64 0 1000 000 23.48 128 1 xxxxxxx 29.50 0 = low, 1 = high, x = don’t care. |
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