Datasheet ADT7316, ADT7317, ADT7318 (Analog Devices) - 3

link to page 6 link to page 6 link to page 7 link to page 5 link to page 5 link to page 5
ADT7316/ADT7317/ADT7318 SPECIFICATIONS
Temperature ranges for A version: –40°C to +120°C. VDD = 2.7 V to 5.5 V, GND = 0 V, REFIN = 2.25 V, unless otherwise noted.
Table 1. Parameter1 Min Typ Max Unit Conditions/Comments
DAC DC PERFORMANCE2, 3 ADT7318 Resolution 8 Bits Relative Accuracy ±0.15 ±1 LSB Differential Nonlinearity ±0.02 ±0.25 LSB Guaranteed monotonic over all codes. ADT7317 Resolution 10 Bits Relative Accuracy ±0.5 ±4 LSB Differential Nonlinearity ±0.05 ±0.5 LSB Guaranteed monotonic over all codes. ADT7316 Resolution 12 Bits Relative Accuracy ±2 ±16 LSB Differential Nonlinearity ±0.02 ±0.9 LSB Guaranteed monotonic over all codes. Offset Error ±0.4 ±2 % of FSR Gain Error ±0.4 ±2 % of FSR Lower Dead Band 20 65 mV Lower dead band exists only if offset error is negative. See Figure 2. Upper Dead Band 60 100 mV Upper dead band exists if VREF = VDD and offset plus gain error is positive. See Figure 3. Offset Error Drift −12 ppm of FSR/°C Gain Error Drift −5 ppm of FSR/°C DC Power Supply Rejection Ratio −60 dB ∆VDD = ±10%. DC Crosstalk 200 μV See Figure 6. THERMAL CHARACTERISTICS Internal reference used. Averaging on. INTERNAL TEMPERATURE SENSOR Accuracy at VDD = 3.3 V ±10% ±1.5 °C TA = 85°C. ±0.5 ±3 °C TA = 0°C to +85°C. ±2 ±5 °C TA = −40°C to +120°C. Accuracy at VDD = 5 V ±5% ±2 ±3 °C TA = 0°C to +85°C. ±3 ±5 °C TA = −40°C to +120°C. Resolution 10 Bits Equivalent to 0.25°C. Long-Term Drift 0.25 °C Drift over 10 years if part is operated at 55°C. EXTERNAL TEMPERATURE SENSOR External transistor = 2N3906. Accuracy at VDD = 3.3 V ±10% ±1.5 °C TA = +85°C. ±3 °C TA = 0°C to +85°C. ±5 °C TA = −40°C to +120°C. Accuracy at VDD = 5 V ±5% ±2 ±3 °C TA = 0°C to +85°C. ±3 ±5 °C TA = −40°C to +120°C. Resolution 10 Bits Equivalent to +0.25°C. Output Source Current 180 μA High level. 11 μA Low level. Thermal Voltage Output 8-Bit DAC Output Resolution 1 °C Scale Factor 8.79 mV/°C 0 V to VREF output. TA = −40°C to +120°C. 17.58 mV/°C 0 V to 2 VREF output. TA = −40°C to +120°C. 10-Bit DAC Output Resolution 0.25 °C Scale Factor 2.2 mV/°C 0 V to VREF output. TA = −40°C to +120°C. 4.39 mV/°C 0 V to 2 VREF output. TA= −40°C to +120°C. Rev. B | Page 3 of 44 Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS FUNCTIONAL BLOCK DIAGRAM DAC AC CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER-UP CALIBRATION CONVERSION SPEED FUNCTIONAL DESCRIPTION—VOLTAGE OUTPUT DIGITAL-TO-ANALOG CONVERTERS DIGITAL-TO-ANALOG SECTION RESISTOR STRING DAC EXTERNAL REFERENCE INPUTS OUTPUT AMPLIFIER THERMAL VOLTAGE OUTPUT Negative Temperatures Positive Temperatures FUNCTIONAL DESCRIPTION—MEASUREMENT TEMPERATURE SENSOR VDD MONITORING ON-CHIP REFERENCE ROUND ROBIN MEASUREMENT SINGLE-CHANNEL MEASUREMENT TEMPERATURE MEASUREMENT METHOD Internal Temperature Measurement External Temperature Measurement TEMPERATURE VALUE FORMAT Temperature Conversion Formula INTERRUPTS REGISTERS REGISTER DESCRIPTIONS SERIAL INTERFACE SERIAL INTERFACE SELECTION I2C SERIAL INTERFACE Writing to the ADT7316/ADT7317/ADT7318 Writing to the Address Pointer Register for a Subsequent Read Writing Data to a Register Reading Data from the ADT7316/ADT7317/ADT7318 SPI SERIAL INTERFACE Write Operation Read Operation SMBUS/SPI INT/ SMBUS Alert Response LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE