Datasheet LTC2389-18 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 18-Bit, 2.5Msps SAR ADC with Pin-Configurable Analog Input Range and 99.8dB SNR |
| Pages / Page | 40 / 7 — Typical. perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, … |
| File Format / Size | PDF / 930 Kb |
| Document Language | English |
Typical. perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, VREF = 4.096V
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LTC2389-18
Typical perFormance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, VREF = 4.096V External Reference, Fully Differential Range (PD/FD = 0V), VCM = 2.048V, fSMPL = 2.5Msps, unless otherwise noted. Integral Nonlinearity Differential Nonlinearity vs Output Code vs Output Code DC Histogram (Zero-Scale)
2.0 1.0 120000 INTERNAL REF INTERNAL REF 1.5 EXTERNAL REF 0.8 EXTERNAL REF 100000 0.6 1.0 0.4 80000 0.5 0.2 0 0 60000 COUNTS –0.5 –0.2 INL ERROR (LSB) DNL ERROR (LSB) 40000 –0.4 –1.0 –0.6 20000 –1.5 –0.8 –2.0 –1.0 0 0 65536 131072 196608 262144 0 65536 131072 196608 262144 –4 –3 –2 –1 0 1 2 3 OUTPUT CODE OUTPUT CODE CODE 238918 G01 238918 G02 238918 G03
Internal Reference Output 32k Point FFT fSMPL = 2.5Msps, DC Histogram (Near Full-Scale) vs Temperature fIN = 2kHz
120000 4.097 0 T SNR = 99.8dB C = 8ppm/°C –20 THD = –116dB 4.096 100000 SINAD = 99.7dB –40 SFDR = 117dB 4.095 80000 –60 4.094 –80 60000 4.093 –100 COUNTS 4.092 40000 AMPLITUDE (dBFS) –120 REFERENCE OUTPUT (V) 4.091 –140 20000 4.090 –160 0 4.089 –180 131052 131054 131056 131058 131060 –55 –35 –15 5 25 45 65 85 105 125 0 250 500 750 1000 1250 CODE TEMPERATURE (°C) FREQUENCY (kHz) 238918 G04 238918 G05 238918 G06
SNR, SINAD vs Input Level, SNR, SINAD vs Input Frequency THD, Harmonics vs Input Frequency fIN = 2kHz
101 –85 101.0 100 –90 99 SNR –95 100.5 SNR 98 –100 97 3RD –105 SINAD 96 SINAD 100.0 –110 THD 95 SNR, SINAD (dB) –115 SNR, SINAD (dB) 94 THD, HARMONICS (dB) 99.5 93 –120 92 –125 2ND 91 –130 99.0 0 12.5 25 37.5 50 62.5 75 87.5 100 0 12.5 25 37.5 50 62.5 75 87.5 100 –40 –30 –20 –10 0 FREQUENCY (kHz) FREQUENCY (kHz) INPUT LEVEL (dB) 238918 G07 238918 G08 238918 G09 238918f 7 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, Fully Differential Range (PD/FD = 0V), VCM = 2.048V, fSMPL = 2.5Msps, unless otherwise noted. Integral Nonlinearity Differential Nonlinearity vs Output Code vs Output Code DC Histogram (Zero-Scale)
2.0 1.0 120000 INTERNAL REF INTERNAL REF 1.5 EXTERNAL REF 0.8 EXTERNAL REF 100000 0.6 1.0 0.4 80000 0.5 0.2 0 0 60000 COUNTS –0.5 –0.2 INL ERROR (LSB) DNL ERROR (LSB) 40000 –0.4 –1.0 –0.6 20000 –1.5 –0.8 –2.0 –1.0 0 0 65536 131072 196608 262144 0 65536 131072 196608 262144 –4 –3 –2 –1 0 1 2 3 OUTPUT CODE OUTPUT CODE CODE 238918 G01 238918 G02 238918 G03
Internal Reference Output 32k Point FFT fSMPL = 2.5Msps, DC Histogram (Near Full-Scale) vs Temperature fIN = 2kHz
120000 4.097 0 T SNR = 99.8dB C = 8ppm/°C –20 THD = –116dB 4.096 100000 SINAD = 99.7dB –40 SFDR = 117dB 4.095 80000 –60 4.094 –80 60000 4.093 –100 COUNTS 4.092 40000 AMPLITUDE (dBFS) –120 REFERENCE OUTPUT (V) 4.091 –140 20000 4.090 –160 0 4.089 –180 131052 131054 131056 131058 131060 –55 –35 –15 5 25 45 65 85 105 125 0 250 500 750 1000 1250 CODE TEMPERATURE (°C) FREQUENCY (kHz) 238918 G04 238918 G05 238918 G06
SNR, SINAD vs Input Level, SNR, SINAD vs Input Frequency THD, Harmonics vs Input Frequency fIN = 2kHz
101 –85 101.0 100 –90 99 SNR –95 100.5 SNR 98 –100 97 3RD –105 SINAD 96 SINAD 100.0 –110 THD 95 SNR, SINAD (dB) –115 SNR, SINAD (dB) 94 THD, HARMONICS (dB) 99.5 93 –120 92 –125 2ND 91 –130 99.0 0 12.5 25 37.5 50 62.5 75 87.5 100 0 12.5 25 37.5 50 62.5 75 87.5 100 –40 –30 –20 –10 0 FREQUENCY (kHz) FREQUENCY (kHz) INPUT LEVEL (dB) 238918 G07 238918 G08 238918 G09 238918f 7 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
