Datasheet LTC2345-18 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Octal, 18-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range |
| Pages / Page | 40 / 3 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| File Format / Size | PDF / 1.9 Mb |
| Document Language | English |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LTC2345-18
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN+ Absolute Input Range (Note 6) l 0 VDD V (IN0+ to IN7+) VIN– Absolute Input Range (Note 6) l 0 VDD V (IN0– to IN7–) VIN+ – VIN– Input Differential Voltage SoftSpan 7: ±VREFBUF Range (Note 6) l – VREFBUF VREFBUF V Range SoftSpan 6: ±VREFBUF/1.024 Range (Note 6) l – VREFBUF/1.024 VREFBUF/1.024 V SoftSpan 5: 0V to VREFBUF Range (Note 6) l 0 VREFBUF V SoftSpan 4: 0V to VREFBUF/1.024 Range (Note 6) l 0 VREFBUF/1.024 V SoftSpan 3: ±0.5 • VREFBUF Range (Note 6) l –0.5 • VREFBUF 0.5 • VREFBUF V SoftSpan 2: ±0.5 • VREFBUF/1.024 Range (Note 6) l –0.5 • VREFBUF/1.024 0.5 • VREFBUF/1.024 V SoftSpan 1: 0V to 0.5 • VREFBUF Range (Note 6) l 0 0.5 • VREFBUF V VCM Input Common Mode Voltage (Note 6) l 0 VDD V Range VIN+ – VIN– Input Differential Overdrive (Note 7) l −VDD VDD V Tolerance IIN Analog Input Leakage Current l –1 1 µA CIN Analog Input Capacitance Sample Mode 50 pF Hold Mode 10 pF CMRR Input Common Mode VIN+ = VIN− = 3.6VP-P 200Hz Sine l 84 102 dB Rejection Ratio VIHCNV CNV High Level Input Voltage l 1.3 V VILCNV CNV Low Level Input Voltage l 0.5 V IINCNV CNV Input Current VIN = 0V to VDD l –10 10 μA
c onverTer characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 8) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution l 18 Bits No Missing Codes l 18 Bits Transition Noise SoftSpans 7 and 6: ±4.096V and ±4V Ranges 2.3 LSBRMS SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges 4.6 LSBRMS SoftSpans 3 and 2: ±2.048V and ±2V Ranges 4.6 LSBRMS SoftSpan 1: 0V to 2.048V Range 9.0 LSBRMS INL Integral Linearity Error SoftSpans 7 and 6: ±4.096V and ±4V Ranges (Note 9) l –5 ±1.5 5 LSB SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges (Note 9) l –5 ±1.5 5 LSB SoftSpans 3 and 2: ±2.048V and ±2V Ranges (Note 9) l –6 ±1.5 6 LSB SoftSpan 1: 0V to 2.048V Range (Note 9) l –6 ±2.0 6 LSB DNL Differential Linearity Error (Note 10) l −0.9 ±0.5 0.9 LSB ZSE Zero-Scale Error (Note 11) l −750 ±50 750 μV Zero-Scale Error Drift ±2 μV/°C FSE Full-Scale Error (Note 11) l −0.13 ±0.025 0.13 %FS Full-Scale Error Drift ±2.5 ppm/°C 234518f For more information www.linear.com/LTC2345-18 3 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
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN+ Absolute Input Range (Note 6) l 0 VDD V (IN0+ to IN7+) VIN– Absolute Input Range (Note 6) l 0 VDD V (IN0– to IN7–) VIN+ – VIN– Input Differential Voltage SoftSpan 7: ±VREFBUF Range (Note 6) l – VREFBUF VREFBUF V Range SoftSpan 6: ±VREFBUF/1.024 Range (Note 6) l – VREFBUF/1.024 VREFBUF/1.024 V SoftSpan 5: 0V to VREFBUF Range (Note 6) l 0 VREFBUF V SoftSpan 4: 0V to VREFBUF/1.024 Range (Note 6) l 0 VREFBUF/1.024 V SoftSpan 3: ±0.5 • VREFBUF Range (Note 6) l –0.5 • VREFBUF 0.5 • VREFBUF V SoftSpan 2: ±0.5 • VREFBUF/1.024 Range (Note 6) l –0.5 • VREFBUF/1.024 0.5 • VREFBUF/1.024 V SoftSpan 1: 0V to 0.5 • VREFBUF Range (Note 6) l 0 0.5 • VREFBUF V VCM Input Common Mode Voltage (Note 6) l 0 VDD V Range VIN+ – VIN– Input Differential Overdrive (Note 7) l −VDD VDD V Tolerance IIN Analog Input Leakage Current l –1 1 µA CIN Analog Input Capacitance Sample Mode 50 pF Hold Mode 10 pF CMRR Input Common Mode VIN+ = VIN− = 3.6VP-P 200Hz Sine l 84 102 dB Rejection Ratio VIHCNV CNV High Level Input Voltage l 1.3 V VILCNV CNV Low Level Input Voltage l 0.5 V IINCNV CNV Input Current VIN = 0V to VDD l –10 10 μA
c onverTer characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 8) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution l 18 Bits No Missing Codes l 18 Bits Transition Noise SoftSpans 7 and 6: ±4.096V and ±4V Ranges 2.3 LSBRMS SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges 4.6 LSBRMS SoftSpans 3 and 2: ±2.048V and ±2V Ranges 4.6 LSBRMS SoftSpan 1: 0V to 2.048V Range 9.0 LSBRMS INL Integral Linearity Error SoftSpans 7 and 6: ±4.096V and ±4V Ranges (Note 9) l –5 ±1.5 5 LSB SoftSpans 5 and 4: 0V to 4.096V and 0V to 4V Ranges (Note 9) l –5 ±1.5 5 LSB SoftSpans 3 and 2: ±2.048V and ±2V Ranges (Note 9) l –6 ±1.5 6 LSB SoftSpan 1: 0V to 2.048V Range (Note 9) l –6 ±2.0 6 LSB DNL Differential Linearity Error (Note 10) l −0.9 ±0.5 0.9 LSB ZSE Zero-Scale Error (Note 11) l −750 ±50 750 μV Zero-Scale Error Drift ±2 μV/°C FSE Full-Scale Error (Note 11) l −0.13 ±0.025 0.13 %FS Full-Scale Error Drift ±2.5 ppm/°C 234518f For more information www.linear.com/LTC2345-18 3 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
