Datasheet LTC2435, LTC2435-1 (Analog Devices) - 5

LTC2435/LTC2435-1
TiMing characTerisTics The
l
denotes 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 ● 5 2000 kHz tHEO External Oscillator High Period ● 0.25 200 µs tLEO External Oscillator Low Period ● 0.25 200 µs tCONV Conversion Time (LTC2435) FO = 0V ● 65.6 66.9 68.3 ms FO = VCC ● 78.7 80.3 81.9 ms External Oscillator (Note 11) ● 10278/fEOSC (in kHz) ms Conversion Time (LTC2435-1) FO = 0V ● 72 73.5 75 ms External Oscillator (Note 11) ● 10278/fEOSC (in kHz) ms f ISCK Internal SCK Frequency Internal Oscillator (Note 10), LTC2435 19.2 kHz Internal Oscillator (Note 10), LTC2435-1 17.5 kHz External Oscillator (Notes 10, 11) fEOSC/8 kHz DISCK Internal SCK Duty Cycle (Note 10) ● 45 55 % fESCK External SCK Frequency Range (Note 9) ● 2000 kHz tLESCK External SCK Low Period (Note 9) ● 250 ns tHESCK External SCK High Period (Note 9) ● 250 ns tDOUT_ISCK Internal SCK 24-Bit Data Output Time Internal Oscillator (Notes 10, 12), LTC2435 ● 1.22 1.25 1.28 ms Internal Oscillator (Notes 10, 12), LTC2435-1 ● 1.34 1.37 1.40 ms External Oscillator (Notes 10, 11) ● 192/fEOSC (in kHz) ms tDOUT_ESCK External SCK 24-Bit Data Output Time (Note 9) ● 24/fESCK (in kHz) ms t1 CS ↓ to SDO Low Z ● 0 200 ns t2 CS ↑ to SDO High Z ● 0 200 ns t3 CS ↓ to SCK ↓ (Note 10) ● 0 200 ns t4 CS ↓ to SCK ↑ (Note 9) ● 50 ns tKQMAX SCK ↓ to SDO Valid ● 220 ns tKQMIN SDO Hold After SCK ↓ (Note 5) ● 15 ns t5 SCK Set-Up Before CS ↓ ● 50 ns t6 SCK Hold After CS ↓ ● 50 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
FO = VCC (internal oscillator) or fEOSC = 128000Hz ±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:
The converter is in external SCK mode of operation such that reliability and lifetime. the SCK pin is used as digital input. The frequency of the clock signal
Note 2:
All voltage values are with respect to GND. driving SCK during the data output is fESCK and is expressed in kHz.
Note 3:
VCC = 2.7 to 5.5V unless otherwise specified.
Note 10:
The converter is in internal SCK mode of operation such that V the SCK pin is used as digital output. In this mode of operation the REF = REF+ – REF–, VREFCM = (REF+ + REF–)/2; V SCK pin has a total equivalent load capacitance C IN = IN+ – IN–, VINCM = (IN+ + IN–)/2. LOAD = 20pF.
Note 4:
F
Note 11:
The external oscillator is connected to the F O pin tied to GND or to VCC or to external conversion clock O pin. The external source with f oscillator frequency, f EOSC = 153600Hz 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 FO = 0V or FO = VCC. a straight line passing through the actual endpoints of the transfer
Note 13:
The output noise includes the contribution of the internal curve. The deviation is measured from the center of the quantization calibration operations. band.
Note 14:
Refer to Offset Accuracy and Drift in the Applications
Note 7:
F Information section. O = 0V (internal oscillator) or fEOSC = 153600Hz ± 2% (external oscillator) for the LTC2435 or fEOSC = 139800Hz ±2% for the LTC2435-1. 24351fc For more information www.linear.com/LTC2435 5 Document Outline Features Description Applications Typical Applications Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics 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 Applications Information Package Description Revision History Typical Application Related Parts