Datasheet LTC2484 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 24-Bit ΔΣ ADC with Easy Drive Input Current Cancellation |
| Pages / Page | 42 / 5 — Ming characTerisTics The. denotes the specifications which apply over the … |
| File Format / Size | PDF / 768 Kb |
| Document Language | English |
Ming characTerisTics The. denotes the specifications which apply over the full operating temperature
Model Line for this Datasheet
Text Version of Document
LTC2484
Ti Ming characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fEOSC External Oscillator Frequency Range (Note 15) l 10 1000 kHz tHEO External Oscillator High Period l 0.125 100 µs tLEO External Oscillator Low Period l 0.125 100 µs tCONV_1 Conversion Time for 1x Speed Mode 50Hz Mode l 157.2 160.3 163.5 ms 60Hz Mode l 131.0 133.6 136.3 ms Simultaneous 50Hz/60Hz Mode l 144.1 146.9 149.9 ms External Oscillator l 41036/fEOSC (in kHz) ms tCONV_2 Conversion Time for 2x Speed Mode 50Hz Mode l 78.7 80.3 81.9 ms 60Hz Mode l 65.6 66.9 68.2 ms Simultaneous 50Hz/60Hz Mode l 72.2 73.6 75.1 ms External Oscillator l 20556/fEOSC (in kHz) ms fISCK Internal SCK Frequency Internal Oscillator (Note 10) 38.4 kHz External Oscillator (Notes 10, 11) fEOSC/8 kHz DISCK Internal SCK Duty Cycle (Note 10) l 45 55 % fESCK External SCK Frequency Range (Note 10) l 4000 kHz tLESCK External SCK Low Period (Note 10) l 125 ns tHESCK External SCK High Period (Note 10) l 125 ns tDOUT_ISCK Internal SCK 32-Bit Data Output Time Internal Oscillator (Notes 10, 12) l 0.81 0.83 0.85 ms External Oscillator (Notes 10, 11) l 256/fEOSC (in kHz) ms tDOUT_ESCK External SCK 32-Bit Data Output Time (Note 10) l 32/fESCK (in kHz) ms t1 CS↓ to SDO Low l 0 200 ns t2 CS↑ to SDO Hi-Z l 0 200 ns t3 CS↓ to SCK↓ (Note 10) l 0 200 ns t4 CS↓ to SCK↑ (Note 10) l 50 ns tKQMAX SCK↓ to SDO Valid l 200 ns tKQMIN SDO Hold After SCK↓ (Note 5) l 15 ns t5 SCK Set-Up Before CS↓ l 50 ns t6 SCK Hold After CS↓ l 50 ns t7 SDI Setup Before SCK↑ (Note 5) l 100 ns t8 SDI Hold After SCK↑ (Note 5) l 100 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
60Hz mode (internal oscillator) or fEOSC = 307.2kHz ±2% may cause permanent damage to the device. Exposure to any Absolute (external oscillator). Maximum Rating condition for extended periods may affect device
Note 9:
Simultaneous 50Hz/60Hz mode (internal oscillator) or reliability and lifetime fEOSC = 280kHz ±2% (external oscillator).
Note 2:
All voltage values are with respect to GND.
Note 10:
The SCK can be configured in external SCK mode or internal SCK
Note 3:
VCC = 2.7V to 5.5V unless otherwise specified. mode. In external SCK mode, the SCK pin is used as digital input and the V driving clock is f REFCM = VREF/2, FS = 0.5VREF ESCK. In internal SCK mode, the SCK pin is used as digital V output and the output clock signal during the data output is f IN = IN+ – IN–, VIN(CM) = (IN+ + IN–)/2 ISCK.
Note 4:
Use internal conversion clock or external conversion clock source
Note 11:
The external oscillator is connected to the fO pin. The external with f oscillator frequency, f EOSC = 307.2kHz unless otherwise specified. EOSC, is expressed in kHz.
Note 5:
Guaranteed by design, not subject to test.
Note 12:
The converter uses the internal oscillator.
Note 6:
Integral nonlinearity is defined as the deviation of a code from a
Note 13:
The output noise includes the contribution of the internal straight line passing through the actual endpoints of the transfer curve. calibration operations. The deviation is measured from the center of the quantization band.
Note 14:
Guaranteed by design and test correlation.
Note 7:
50Hz mode (internal oscillator) or f
Note 15:
Refer to Applications Information section for performance EOSC = 256kHz ±2% (external oscillator). vs data rate graphs.
Note 16:
For VCC < 3V, VIH is 2.5V for pin fO. 2484ff For more information www.linear.com/LTC2484 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics (Normal Speed) Pin Configuration Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference Digital Inputs and Digital Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Timing Diagrams Applications Information Package Description Revision History Typical Application Related Parts
Ti Ming characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fEOSC External Oscillator Frequency Range (Note 15) l 10 1000 kHz tHEO External Oscillator High Period l 0.125 100 µs tLEO External Oscillator Low Period l 0.125 100 µs tCONV_1 Conversion Time for 1x Speed Mode 50Hz Mode l 157.2 160.3 163.5 ms 60Hz Mode l 131.0 133.6 136.3 ms Simultaneous 50Hz/60Hz Mode l 144.1 146.9 149.9 ms External Oscillator l 41036/fEOSC (in kHz) ms tCONV_2 Conversion Time for 2x Speed Mode 50Hz Mode l 78.7 80.3 81.9 ms 60Hz Mode l 65.6 66.9 68.2 ms Simultaneous 50Hz/60Hz Mode l 72.2 73.6 75.1 ms External Oscillator l 20556/fEOSC (in kHz) ms fISCK Internal SCK Frequency Internal Oscillator (Note 10) 38.4 kHz External Oscillator (Notes 10, 11) fEOSC/8 kHz DISCK Internal SCK Duty Cycle (Note 10) l 45 55 % fESCK External SCK Frequency Range (Note 10) l 4000 kHz tLESCK External SCK Low Period (Note 10) l 125 ns tHESCK External SCK High Period (Note 10) l 125 ns tDOUT_ISCK Internal SCK 32-Bit Data Output Time Internal Oscillator (Notes 10, 12) l 0.81 0.83 0.85 ms External Oscillator (Notes 10, 11) l 256/fEOSC (in kHz) ms tDOUT_ESCK External SCK 32-Bit Data Output Time (Note 10) l 32/fESCK (in kHz) ms t1 CS↓ to SDO Low l 0 200 ns t2 CS↑ to SDO Hi-Z l 0 200 ns t3 CS↓ to SCK↓ (Note 10) l 0 200 ns t4 CS↓ to SCK↑ (Note 10) l 50 ns tKQMAX SCK↓ to SDO Valid l 200 ns tKQMIN SDO Hold After SCK↓ (Note 5) l 15 ns t5 SCK Set-Up Before CS↓ l 50 ns t6 SCK Hold After CS↓ l 50 ns t7 SDI Setup Before SCK↑ (Note 5) l 100 ns t8 SDI Hold After SCK↑ (Note 5) l 100 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
60Hz mode (internal oscillator) or fEOSC = 307.2kHz ±2% may cause permanent damage to the device. Exposure to any Absolute (external oscillator). Maximum Rating condition for extended periods may affect device
Note 9:
Simultaneous 50Hz/60Hz mode (internal oscillator) or reliability and lifetime fEOSC = 280kHz ±2% (external oscillator).
Note 2:
All voltage values are with respect to GND.
Note 10:
The SCK can be configured in external SCK mode or internal SCK
Note 3:
VCC = 2.7V to 5.5V unless otherwise specified. mode. In external SCK mode, the SCK pin is used as digital input and the V driving clock is f REFCM = VREF/2, FS = 0.5VREF ESCK. In internal SCK mode, the SCK pin is used as digital V output and the output clock signal during the data output is f IN = IN+ – IN–, VIN(CM) = (IN+ + IN–)/2 ISCK.
Note 4:
Use internal conversion clock or external conversion clock source
Note 11:
The external oscillator is connected to the fO pin. The external with f oscillator frequency, f EOSC = 307.2kHz unless otherwise specified. EOSC, is expressed in kHz.
Note 5:
Guaranteed by design, not subject to test.
Note 12:
The converter uses the internal oscillator.
Note 6:
Integral nonlinearity is defined as the deviation of a code from a
Note 13:
The output noise includes the contribution of the internal straight line passing through the actual endpoints of the transfer curve. calibration operations. The deviation is measured from the center of the quantization band.
Note 14:
Guaranteed by design and test correlation.
Note 7:
50Hz mode (internal oscillator) or f
Note 15:
Refer to Applications Information section for performance EOSC = 256kHz ±2% (external oscillator). vs data rate graphs.
Note 16:
For VCC < 3V, VIH is 2.5V for pin fO. 2484ff For more information www.linear.com/LTC2484 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics (Normal Speed) Pin Configuration Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference Digital Inputs and Digital Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Timing Diagrams Applications Information Package Description Revision History Typical Application Related Parts
