Datasheet LTC2389-18 (Analog Devices) - 9
| 制造商 | Analog Devices |
| 描述 | 18-Bit, 2.5Msps SAR ADC with Pin-Configurable Analog Input Range and 99.8dB SNR |
| 页数 / 页 | 40 / 9 — Typical. perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, … |
| 文件格式/大小 | PDF / 930 Kb |
| 文件语言 | 英语 |
Typical. perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, VREF = 4.096V
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文件文字版本
LTC2389-18
Typical perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, VREF = 4.096V External Reference, Pseudo-Differential Unipolar Range (PD/FD = OVDD, OB/2C = OVDD), fSMPL = 2.5Msps, unless otherwise noted. Differential Nonlinearity Integral Nonlinearity vs Output Code vs Output Code DC Histogram (Near Zero-Scale)
2.0 1.0 80000 INTERNAL REF INTERNAL REF 1.5 EXTERNAL REF 0.8 EXTERNAL REF 0.6 1.0 60000 0.4 0.5 0.2 0 0 40000 COUNTS –0.5 –0.2 INL ERROR (LSB) DNL ERROR (LSB) –0.4 –1.0 20000 –0.6 –1.5 –0.8 –2.0 –1.0 0 0 65536 131072 196608 262144 0 65536 131072 196608 262144 10 11 12 13 14 15 16 17 18 19 20 21 22 23 OUTPUT CODE OUTPUT CODE CODE 238918 G19 238918 G20 238918 G21
32k Point FFT fSMPL = 2.5Msps, DC Histogram (Near Full-Scale) fIN = 2kHz SNR, SINAD vs Input Frequency
80000 0 98 SNR = 94.6dB –20 THD = –112dB 96 SINAD = 94.5dB SNR –40 SFDR = 113dB 60000 94 –60 92 –80 90 SINAD 40000 –100 COUNTS 88 AMPLITUDE (dBFS) –120 SNR, SINAD (dB) 86 20000 –140 84 –160 82 0 –180 80 262120 262123 262126 262129 262132 262135 0 250 500 750 1000 1250 0 12.5 25 37.5 50 62.5 75 87.5 100 CODE FREQUENCY (kHz) FREQUENCY (kHz) 238918 G22 238918 G23 238918 G24
SNR, SINAD vs Input Level, SNR, SINAD vs Temperature, THD, Harmonics vs Input Frequency fIN = 2kHz fIN = 2kHz
–75 95.5 97 –80 96 –85 95.0 SNR –90 THD 95 SNR 2ND –95 94.5 SINAD 94 –100 SINAD –105 SNR, SINAD (dB) SNR, SINAD (dB) 93 THD, HARMONICS (dB) 3RD 94.0 –110 92 –115 –120 93.5 91 0 12.5 25 37.5 50 62.5 75 87.5 100 –40 –30 –20 –10 0 –55 –35 –15 5 25 45 65 85 105 125 FREQUENCY (kHz) INPUT LEVEL (dB) TEMPERATURE (°C) 238918 G25 238918 G26 238918 G27 238918f 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Analog Input Converter Characteristics Dynamic Accuracy Reference Characteristics Digital Inputs And Digital Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagrams Applications Information Package Description Typical Application Related Parts
Typical perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, VREF = 4.096V External Reference, Pseudo-Differential Unipolar Range (PD/FD = OVDD, OB/2C = OVDD), fSMPL = 2.5Msps, unless otherwise noted. Differential Nonlinearity Integral Nonlinearity vs Output Code vs Output Code DC Histogram (Near Zero-Scale)
2.0 1.0 80000 INTERNAL REF INTERNAL REF 1.5 EXTERNAL REF 0.8 EXTERNAL REF 0.6 1.0 60000 0.4 0.5 0.2 0 0 40000 COUNTS –0.5 –0.2 INL ERROR (LSB) DNL ERROR (LSB) –0.4 –1.0 20000 –0.6 –1.5 –0.8 –2.0 –1.0 0 0 65536 131072 196608 262144 0 65536 131072 196608 262144 10 11 12 13 14 15 16 17 18 19 20 21 22 23 OUTPUT CODE OUTPUT CODE CODE 238918 G19 238918 G20 238918 G21
32k Point FFT fSMPL = 2.5Msps, DC Histogram (Near Full-Scale) fIN = 2kHz SNR, SINAD vs Input Frequency
80000 0 98 SNR = 94.6dB –20 THD = –112dB 96 SINAD = 94.5dB SNR –40 SFDR = 113dB 60000 94 –60 92 –80 90 SINAD 40000 –100 COUNTS 88 AMPLITUDE (dBFS) –120 SNR, SINAD (dB) 86 20000 –140 84 –160 82 0 –180 80 262120 262123 262126 262129 262132 262135 0 250 500 750 1000 1250 0 12.5 25 37.5 50 62.5 75 87.5 100 CODE FREQUENCY (kHz) FREQUENCY (kHz) 238918 G22 238918 G23 238918 G24
SNR, SINAD vs Input Level, SNR, SINAD vs Temperature, THD, Harmonics vs Input Frequency fIN = 2kHz fIN = 2kHz
–75 95.5 97 –80 96 –85 95.0 SNR –90 THD 95 SNR 2ND –95 94.5 SINAD 94 –100 SINAD –105 SNR, SINAD (dB) SNR, SINAD (dB) 93 THD, HARMONICS (dB) 3RD 94.0 –110 92 –115 –120 93.5 91 0 12.5 25 37.5 50 62.5 75 87.5 100 –40 –30 –20 –10 0 –55 –35 –15 5 25 45 65 85 105 125 FREQUENCY (kHz) INPUT LEVEL (dB) TEMPERATURE (°C) 238918 G25 238918 G26 238918 G27 238918f 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Analog Input Converter Characteristics Dynamic Accuracy Reference Characteristics Digital Inputs And Digital Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagrams Applications Information Package Description Typical Application Related Parts