Datasheet LTC2345-18 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Octal, 18-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range |
| Pages / Page | 40 / 10 — Typical perForMance characTerisTics. TA = 25°C, VDD = 5V, OVDD = 2.5V, … |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
Typical perForMance characTerisTics. TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal
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LTC2345-18
Typical perForMance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal Reference and Buffer (VREFBUF = 4.096V), fSMPL = 200ksps, unless otherwise noted. 32k Point Arbitrary Two-Tone FFT fSMPL = 200kHz, IN+ = –7dBFS 2kHz 32k Point FFT fSMPL = 200kHz, SNR, SINAD vs VREFBUF, Sine, IN– = –7dBFS 3.1kHz Sine fIN = 2kHz fIN = 2kHz
0 0 97 ±4.096V RANGE 0V TO 4.096V RANGE ±VREFBUF RANGE –20 ARBITRARY DRIVE –20 UNIPOLAR DRIVE (IN– = 0V) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) –40 SFDR = 120dB 95 –40 SNR = 86.1dB SNR = 92.1dB THD = –111dB –60 –60 SINAD = 86.1dB SNR SFDR = 112dB 93 –80 –80 SINAD –100 –100 91 –120 AMPLITUDE (dBFS) –120 AMPLITUDE (dBFS) SNR, SINAD (dBFS) –140 –140 89 –160 –160 –180 –180 87 0 20 40 60 80 100 0 20 40 60 80 100 2.5 3 3.5 4 4.5 5 FREQUENCY (KHz) FREQUENCY (kHz) REFBUF VOLTAGE (V) 234518 G10 234518 G11 234518 G12
THD, Harmonics vs VREFBUF, SNR, SINAD THD, Harmonics fIN = 2kHz vs Input Frequency vs Input Frequency
–100 102 –70 ±VREFBUF RANGE ±4.096V RANGE ±4.096V RANGE –105 FULLY DIFFERENIAL DRIVE (IN– = –IN+) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) 98 –80 –110 THD 94 –115 SNR –90 2ND –120 90 –100 SINAD THD –125 86 3RD SNR, SINAD (dBFS) –110 THD, HARMONICS (dBFS) –130 2ND THD, HARMONICS (dBFS) 82 –120 –135 3RD –140 78 –130 2.5 3 3.5 4 4.5 5 100 1k 10k 100k 100 1k 10k 100k REFBUF VOLTAGE (V) FREQUENCY (Hz) FREQUENCY (Hz) 234518 G13 234518 G14 234518 G15
THD, Harmonics vs Input SNR, SINAD vs Input Level, CMRR vs Input Frequency and Common Mode, fIN = 2kHz fIN = 2kHz Channel
–100 93.0 150 ±4.096V RANGE ±4.096V RANGE ±4.096V RANGE 1VPP FULLY DIFFERENTIAL DRIVE FULLY DIFFERENTIAL DRIVE (IN– = –IN+) IN+ = IN– = 3.6V –105 140 pp SINE 92.8 ALL CHANNELS SNR 130 –110 92.6 THD 120 –115 SINAD 92.4 110 CMRR (dB) –120 3RD SNR, SINAD (dBFS) 100 THD, HARMONICS (dBFS) 92.2 –125 90 2ND –130 92.0 80 0 1 2 3 4 5 –40 –30 –20 –10 0 10 100 1k 10k 100k 1M INPUT COMMON MODE (V) INPUT LEVEL (dBFS) FREQUENCY (Hz) 234518 G16 234518 G17 234518 G18 234518f 10 For more information www.linear.com/LTC2345-18 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Configuration Tables Functional Block Diagram Timing Diagram Applications Information Board Layout Package Description Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, VDD = 5V, OVDD = 2.5V, Internal Reference and Buffer (VREFBUF = 4.096V), fSMPL = 200ksps, unless otherwise noted. 32k Point Arbitrary Two-Tone FFT fSMPL = 200kHz, IN+ = –7dBFS 2kHz 32k Point FFT fSMPL = 200kHz, SNR, SINAD vs VREFBUF, Sine, IN– = –7dBFS 3.1kHz Sine fIN = 2kHz fIN = 2kHz
0 0 97 ±4.096V RANGE 0V TO 4.096V RANGE ±VREFBUF RANGE –20 ARBITRARY DRIVE –20 UNIPOLAR DRIVE (IN– = 0V) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) –40 SFDR = 120dB 95 –40 SNR = 86.1dB SNR = 92.1dB THD = –111dB –60 –60 SINAD = 86.1dB SNR SFDR = 112dB 93 –80 –80 SINAD –100 –100 91 –120 AMPLITUDE (dBFS) –120 AMPLITUDE (dBFS) SNR, SINAD (dBFS) –140 –140 89 –160 –160 –180 –180 87 0 20 40 60 80 100 0 20 40 60 80 100 2.5 3 3.5 4 4.5 5 FREQUENCY (KHz) FREQUENCY (kHz) REFBUF VOLTAGE (V) 234518 G10 234518 G11 234518 G12
THD, Harmonics vs VREFBUF, SNR, SINAD THD, Harmonics fIN = 2kHz vs Input Frequency vs Input Frequency
–100 102 –70 ±VREFBUF RANGE ±4.096V RANGE ±4.096V RANGE –105 FULLY DIFFERENIAL DRIVE (IN– = –IN+) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) FULLY DIFFERENTIAL DRIVE (IN– = –IN+) 98 –80 –110 THD 94 –115 SNR –90 2ND –120 90 –100 SINAD THD –125 86 3RD SNR, SINAD (dBFS) –110 THD, HARMONICS (dBFS) –130 2ND THD, HARMONICS (dBFS) 82 –120 –135 3RD –140 78 –130 2.5 3 3.5 4 4.5 5 100 1k 10k 100k 100 1k 10k 100k REFBUF VOLTAGE (V) FREQUENCY (Hz) FREQUENCY (Hz) 234518 G13 234518 G14 234518 G15
THD, Harmonics vs Input SNR, SINAD vs Input Level, CMRR vs Input Frequency and Common Mode, fIN = 2kHz fIN = 2kHz Channel
–100 93.0 150 ±4.096V RANGE ±4.096V RANGE ±4.096V RANGE 1VPP FULLY DIFFERENTIAL DRIVE FULLY DIFFERENTIAL DRIVE (IN– = –IN+) IN+ = IN– = 3.6V –105 140 pp SINE 92.8 ALL CHANNELS SNR 130 –110 92.6 THD 120 –115 SINAD 92.4 110 CMRR (dB) –120 3RD SNR, SINAD (dBFS) 100 THD, HARMONICS (dBFS) 92.2 –125 90 2ND –130 92.0 80 0 1 2 3 4 5 –40 –30 –20 –10 0 10 100 1k 10k 100k 1M INPUT COMMON MODE (V) INPUT LEVEL (dBFS) FREQUENCY (Hz) 234518 G16 234518 G17 234518 G18 234518f 10 For more information www.linear.com/LTC2345-18 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Internal Reference Characteristics Reference Buffer Characteristics Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Configuration Tables Functional Block Diagram Timing Diagram Applications Information Board Layout Package Description Typical Application Related Parts
