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AD6644ST/PCB 数据表(PDF) 3 Page - Analog Devices |
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AD6644ST/PCB 数据表(HTML) 3 Page - Analog Devices |
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3 / 19 page  –3– REV. 0 AD6644 AC SPECIFICATIONS1 Test AD6644AST-40 AD6644AST-65 Parameter Temp Level Min Typ Max Min Typ Max Unit SNR Analog Input 2.2 MHz 25 °C II 74.5 72 74.5 dB @ –1 dBFS 15.5 MHz 25 °C II 74.0 72 74.0 dB 30.5 MHz 25 °C II 73.5 72 73.5 dB SINAD 2 Analog Input 2.2 MHz 25 °C II 74.5 72 74.5 dB @ –1 dBFS 15.5 MHz 25 °C II 74.0 72 74.0 dB 30.5 MHz 25 °C V 73.0 73.0 dB WORST HARMONIC (2 ND or 3RD)2 Analog Input 2.2 MHz 25 °CII 92 83 92 dBc @ –1 dBFS 15.5 MHz 25 °CII 90 83 90 dBc 30.5 MHz 25 °C V 85 85 dBc WORST HARMONIC (4 TH or Higher)2 Analog Input 2.2 MHz 25 °CII 93 85 93 dBc @ –1 dBFS 15.5 MHz 25 °CII 92 85 92 dBc 30.5 MHz 25 °C V 92 92 dBc TWO-TONE SFDR 2, 3, 4 Full V 100 100 dBFS TWO-TONE IMD REJECTION 2, 4 F1, F2 @ –7 dBFS Full V 90 90 dBc ANALOG INPUT BANDWIDTH 25 °C V 250 250 MHz NOTES 1All ac specifications tested by driving ENCODE and ENCODE differentially. 2AV CC = 5 V to 5.25 V for rated ac performance. 3Analog input signal power swept from –7 dBFS to –100 dBFS. 4F1 = 15 MHz, F2 = 15.5 MHz. Specifications subject to change without notice. SWITCHING SPECIFICATIONS Test AD6644AST-40/65 Parameter Name Temp Level Min Typ Max Unit ENCODE INPUT PARAMETERS 1 Encode Period 1 @ 65 MSPS tENC Full V 15.4 ns Encode Period 1 @ 40 MSPS tENC Full V 25 ns Encode Pulsewidth High 2 @ 65 MSPS tENCH Full IV 6.2 7.7 9.2 ns Encode Pulsewidth Low @ 65 MSPS tENCL Full IV 6.2 7.7 9.2 ns ENCODE/DATA READY Encode Rising to Data Ready Falling tDR Full IV 2.6 3.4 4.6 ns Encode Rising to Data Ready Rising tE_DR tENCH + tDR @ 65 MSPS (50% Duty Cycle) Full IV 10.3 11.1 12.3 ns @ 40 MSPS (50% Duty Cycle) Full IV 15.1 15.9 17.1 ns ENCODE/DATA (D13:0), OVR ENC to DATA Falling Low tE_FL Full IV 3.8 5.5 9.2 ns ENC to DATA Rising Low tE_RL Full IV 3.0 4.3 6.4 ns ENCODE to DATA Delay (Hold Time) 3 tH_E Full IV 3.0 4.3 6.4 ns ENCODE to DATA Delay (Setup Time) 4 tS_E tENC – tE_FL Encode = 65 MSPS (50% Duty Cycle) Full IV 6.2 9.8 11.6 ns Encode = 40 MSPS (50% Duty Cycle) Full IV 15.9 19.4 21.2 ns (AVCC = 5 V, DVCC = 3.3 V; ENCODE and ENCODE = Maximum Conversion Rate MSPS; TMIN = –25 C, TMAX = +85 C) (AVCC = 5 V, DVCC = 3.3 V; ENCODE and ENCODE = Maximum Conversion Rate MSPS; TMIN = –25 C, TMAX = +85 C, CLOAD = 10 pF) |
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