Datasheet LTC2500-32 (Analog Devices) - 9

LTC2500-32
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VDD = 2.5V, OVDD = 2.5V, VCM = 2.5V, REF = 5V, fSMPL = 1Msps, no latency output, unless otherwise noted. 128k Point FFT Filtered Output, 128k Point FFT Filtered Output, 8k Point FFT Filtered Output, fIN = 200Hz, DF = 64, SSINC Filter fIN = 100Hz, DF = 1024, SSINC Filter fIN = 11Hz, DF = 16384, SSINC Filter
0 0 0 DR = 128dB DR = 137dB DR = 149dB –20 –20 –20 –40 –40 –40 –60 –60 –60 –80 –80 –80 –100 –100 –100 –120 –120 –120 AMPLITUDE (dBFS) –140 AMPLITUDE (dBFS) –140 AMPLITUDE (dBFS) –140 –160 –160 –160 –180 –180 –180 –200 –200 –200 0 2 4 6 8 0 122 244 366 488 0 8 15 23 31 FREQUENCY (kHz) FREQUENCY (Hz) FREQUENCY (Hz) 250032 G10 250032 G11 250032 G12
Filtered Output Dynamic Range THD, Harmonics vs Input vs DF SNR, SINAD vs Input Frequency Frequency
150 105 –90 THD 104 –95 2ND 140 103 3RD –100 SNR 102 –105 130 101 –110 100 SINAD –115 120 99 –120 SINC1 SNR, SINAD (dBFS) DYNAMIC RANGE (dB) SINC2 98 –125 SINC3 HARMONICS, THD (dBFS) 110 97 SINC4 –130 SSINC 96 –135 FLAT PASSBAND 100 95 –140 4 10 100 1000 16384 0 25 50 75 100 125 150 175 200 0 25 50 75 100 125 150 175 200 DOWNSAMPLING FACTOR FREQUENCY (kHz) FREQUENCY (kHz) 250032 G13 250032 G14 250032 G15
SNR, SINAD vs Input Level, SNR, SINAD vs Reference THD, Harmonics vs Reference fIN = 2kHz Voltage, fIN = 2kHz Voltage, fIN = 2kHz
105 105 –115 104 SNR 104 103 –120 SNR 102 SINAD SINAD –125 103 101 100 –130 102 99 SNR, SINAD (dBFS) SNR, SINAD (dBFS) 98 –135 HARMONICS, THD (dBFS) 101 97 –140 THD 96 2ND 3RD 100 95 –145 –40 –30 –20 –10 0 2.5 3 3.5 4 4.5 5 2.5 3 3.5 4 4.5 5 INPUT LEVEL (dB) REFERENCE VOLTAGE (V) REFERENCE VOLTAGE (V) 250032 G16 250032 G17 250032 G18 250032fb For more information www.linear.com/LTC2500-32 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Converter Characteristics for Filtered Output (SDOA) Dynamic Accuracy for Filtered Output (SDOA) Converter Characteristics for No latency Output (SDOB) Dynamic Accuracy for No Latency Output (SDOB) Reference Input Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Applications Information Overview Converter Operation Transfer Function Analog Input Input Drive Circuits ADC Reference Dynamic Performance Power Considerations Timing and Control Decimation Filters Digital Filter Types Digital Interface Preset Filter Modes Filtered Output Data No Latency Output Data Board Layout Package Description Revision History Typical Application Related Parts