Datasheet LTC2485 (Analog Devices) - 3

LTC2485
e lecTrical characTerisTics (2x speeD) The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1 ≤ VREF ≤ VCC, –FS ≤ VIN ≤ +FS (Note 5) ● 24 Bits Integral Nonlinearity 5V ≤ VCC ≤ 5.5V, VREF = 5V, VIN(CM) = 2.5V (Note 6) ● 2 10 ppm of VREF 2.7V ≤ VCC ≤ 5.5V, VREF = 2.5V, VIN(CM) = 1.25V (Note 6) 1 Offset Error 2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC (Note 13) ● 0.5 2 mV Offset Error Drift 2.5V ≤ VREF ≤ VCC, GND ≤ IN+ = IN– ≤ VCC 100 nV/°C Positive Full-Scale Error 2.5V ≤ VREF ≤ VCC, IN+ = 0.75VREF, IN– = 0.25VREF ● 25 ppm of VREF Positive Full-Scale Error Drift 2.5V ≤ VREF ≤ VCC, IN+ = 0.75VREF, IN– = 0.25VREF 0.1 ppm of VREF/°C Negative Full-Scale Error 2.5V ≤ VREF ≤ VCC, IN– = 0.75VREF, IN+ = 0.25VREF ● 25 ppm of VREF Negative Full-Scale Error Drift 2.5V ≤ VREF ≤ VCC, IN– = 0.75VREF, IN+ = 0.25VREF 0.1 ppm of VREF/°C Output Noise 5V ≤ VCC ≤ 5.5V, VREF = 5V, GND ≤ IN– = IN+ ≤ VCC 0.84 µVRMS
c onverTer characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Common Mode Rejection DC 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5) ● 140 dB Input Common Mode Rejection 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5) ● 140 dB 50Hz ±2% Input Common Mode Rejection 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5) ● 140 dB 60Hz ±2% Input Normal Mode Rejection 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Notes 5, 7) ● 110 120 dB 50Hz ±2% Input Normal Mode Rejection 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Notes 5, 8) ● 110 120 dB 60Hz ±2% Input Normal Mode Rejection 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Notes 5, 9) ● 87 dB 50Hz/60Hz ±2% Reference Common Mode Rejection DC 2.5V ≤ VREF ≤ VCC, GND ≤ IN– = IN+ ≤ VCC (Note 5) ● 120 140 dB Power Supply Rejection DC VREF = 2.5V, IN– = IN+ = GND 120 dB Power Supply Rejection, 50Hz ±2% VREF = 2.5V, IN– = IN+ = GND (Notes 7, 9) 120 dB Power Supply Rejection, 60Hz ±2% VREF = 2.5V, IN– = IN+ = GND (Notes 8, 9) 120 dB
a nalog inpuT anD reFerence 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
IN+ Absolute/Common Mode IN+ Voltage GND – 0.3V VCC + 0.3V V IN– Absolute/Common Mode IN– Voltage GND – 0.3V VCC + 0.3V V FS Full-Scale of the Differential Input (IN+ – IN–) ● 0.5VREF V LSB Least Significant Bit of the Output Code ● FS/224 VIN Input Differential Voltage Range (IN+ – IN–) ● –FS +FS V VREF Reference Voltage Range (REF+ – REF–) ● 0.1 VCC V 2485fd For more information www.linear.com/LTC2485 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics (Normal Speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference I2C Digital Inputs and Digital Outputs Power Requirements Timing Characteristics I2C Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Package Description Revision History Typical Application Related Parts