MAX5477 MAXIM [Maxim Integrated Products], MAX5477 Datasheet
MAX5477
Available stocks
Related parts for MAX5477
MAX5477 Summary of contents
Page 1
... The MAX5477/MAX5478/MAX5479 provide three nomi- nal resistance values: 10kΩ (MAX5477), 50kΩ (MAX5478), or 100kΩ (MAX5479). The nominal resistor temperature coefficient is 35ppm/°C end-to-end and 5ppm/°C ratiometric. The low temperature coefficient ...
Page 2
... INL (Note 2) (Note 2) R0 and R1 set to same code (all codes MAX5477 MAX5478 MAX5479 MAX5477 MAX5478 MAX5479 INL 3V, MAX5477, guaranteed DD monotonic V = 3V, MAX5478 3V, MAX5479 and R1 set to same code (all codes (Note ...
Page 3
Dual, 256-Tap, Nonvolatile, I ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.25V GND +25°C.) (Note 1) PARAMETER SYMBOL DIGITAL INPUTS Input High Voltage (Note 5) Input Low Voltage Output Low Voltage ...
Page 4
... Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor unconnected and L_ = GND. For V = +5V, the wiper is driven with 400µA (MAX5477), 80µA (MAX5478), or 40µA (MAX5479). For V DD the wiper is driven with 200µA (MAX5477), 40µA (MAX5478), or 20µA (MAX5479). ...
Page 5
... CODE 2 C-Interface, TAP-TO-TAP SWITCHING TRANSIENT MAX5477/78/79 toc03 MAX5478 C = 10pF FROM TAP 00 TO TAP 04 1µs/div WIPER TRANSIENT AT POWER-ON MAX5477/78/79 toc06 V DD 2V/div W_ 1V/div MAX5479 TAP = 128 2µs/div INTEGRAL NONLINEARITY vs. CODE (VRM MODE) 0.3 MAX5478 0.2 0 ...
Page 6
Dual, 256-Tap, Nonvolatile, I Digital Potentiometers (V = +5V GND +25°C, unless otherwise noted DIFFERENTIAL NONLINEARITY vs. CODE (VRM MODE) 0.10 MAX5478 0.08 0.06 0.04 0.02 0 -0.02 -0.04 ...
Page 7
Dual, 256-Tap, Nonvolatile +5V GND +25°C, unless otherwise noted MIDSCALE WIPER RESPONSE vs. FREQUENCY (MAX5478 50pF -5 ...
Page 8
... C Serial-Interface Timing Diagram Detailed Description The MAX5477/MAX5478/MAX5479 contain two resistor arrays with 255 elements in each array. The MAX5477 has a total end-to-end resistance of 10kΩ, the MAX5478 has an end-to-end resistance of 50kΩ, and the MAX5479 has an end-to-end resistance of 100kΩ. ...
Page 9
... An address byte, a command byte, and 8 data bits program the wiper position for each potentiometer. The and L_ terminals of the MAX5477/MAX5478/ MAX5479 are similar to the two end terminals of a WIPER mechanical potentiometer. The MAX5477/MAX5478/ MAX5479 feature power-on reset circuitry that loads the ...
Page 10
... SLAVE ADDRESS open-drain drivers. Each transmission consists of a START (S) condition 0101000 (Figure 3) sent by a master, followed by the 0101001 MAX5477/MAX5478/MAX5479 7-bit slave address plus 0101010 the NOP/W bit (Figure 4), 1 command byte and 1 data 0101011 byte, and finally a STOP (P) condition (Figure 3). ...
Page 11
... The 1st byte of information is the command byte. The bytes received after the command byte are the data bytes. The 1st data byte goes into the internal register of the MAX5477/MAX5478/MAX5479 as select the command byte (Figure 8). Use the command byte to select the source and desti- ...
Page 12
... Standby ing and gain to the resistor-divider network made by the potentiometer (Figure fixed resistor and a variable resistor (see Figure 10). Figure 11 shows the MAX5477/MAX5478/MAX5479 in a 1st-order programmable application filter. Adjust the gain of the filter with R with R . Use the following equations to calculate the ...
Page 13
... GND LB Connect the high and low terminals of one potentiome- ter of a MAX5477 between the NULL inputs of a MAX410 and the wiper to the op amp’s positive supply to nullify the offset voltage over the operating tempera- ture range. Install the other potentiometer in the feed- back path to adjust the gain of the MAX410 (Figure 12) ...
Page 14
Dual, 256-Tap, Nonvolatile, I Digital Potentiometers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages 0.10 C NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ...
Page 15
Dual, 256-Tap, Nonvolatile, I (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely ...