MAX5477 查看數據表（PDF） - Maxim Integrated
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MAX5477 Datasheet PDF : 16 Pages
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Dual, 256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
SDA, SCL, VDD to GND .........................................-0.3V to +6.0V
All Other Pins to GND.................................-0.3V to (VDD + 0.3V)
Maximum Continuous Current into H_, L_, and W_
MAX5477......................................................................±5.0mA
MAX5478......................................................................±1.3mA
MAX5479......................................................................±0.6mA
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN (derate 17.5mW/°C above +70°C) .......1398mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θJA) ........57.2°C/W
Junction-to-Case Thermal Resistance (θJC) ................40°C/W
TSSOP
Junction-to-Ambient Thermal Resistance (θJA) ......100.4°C/W
Junction-to-Case Thermal Resistance (θJC) ................30°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +5.25V, H_ = VDD, L_ = GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VDD = +5V,
TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
Resolution
256
Integral Nonlinearity
INL
(Note 3)
Differential Nonlinearity
DNL (Note 3)
Dual Code Matching
R0 and R1 set to same code (all codes)
TYP
MAX UNITS
±1
±0.5
±1
Taps
LSB
LSB
LSB
End-to-End Resistance
Temperature Coefficient
TCR
70
ppm/°C
Ratiometric Resistance
Temperature Coefficient
10
ppm/°C
MAX5477
Full-Scale Error
MAX5478
MAX5479
MAX5477
Zero-Scale Error
MAX5478
MAX5479
DC PERFORMANCE (VARIABLE-RESISTOR MODE)
Integral Nonlinearity (Note 4)
INL
VDD = 3V
VDD = 5V
MAX5477
Differential Nonlinearity (Note 4)
DNL MAX5478
MAX5479
-4
-0.6
LSB
-0.3
4
0.6
LSB
0.3
±3
LSB
±1.5
±1
±1
LSB
±1
2 _______________________________________________________________________________________
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