Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - Digital potentiometer linear Non-permanent TDFN 8 EP

General Description

The MAX5395 single, 256-tap volatile, low-voltage

linear taper digital potentiometer offers three end-to-

end resistance values of 10kΩ, 50kΩ, and 100kΩ.

Potentiometer terminals are independent of supply for

voltages up to 5.25V with single-supply operation from

1.7V to 5.5V (charge pump enabled). User-controlled

shutdown modes allow the H, W, or L terminal to be

opened with the wiper position set to zero-code, mid-

code, full-code, or the value contained in the wiper

be achieved for supply voltages between 2.6V and 5.5V

by disabling the internal charge pump and not allowing

potentiometer terminals to exceed the supply voltage by

more than 0.3V. The MAX5395 provides a low 50ppm/°C

end-to-end temperature coefficient and features an I

serial interface.

The small package size, low operating supply voltage,

low supply current, and automotive temperature range

of the MAX5395 make the device uniquely suited for the

portable consumer market and battery-backup industrial

applications.

The MAX5395 is available in a lead-free, 8-pin TDFN

(2mm x 2mm) package. The device operates over the

-40°C to +125°C automotive temperature range.

Features

● Single Linear Taper 256-Tap Positions

● 10kΩ, 50kΩ, and 100kΩ End-to-End Resistance

● 1.7V to 5.5V Extended Single Supply

● 0 to 5.25V H, W, L Operating Voltage Independent of

● 1μA (typ) Supply Current in Low-Power Mode

● ±1.0 LSB INL, ±0.5 LSB DNL (max) Wiper Accuracy

● Power-On Sets Wiper to Midscale

● 50ppm/°C End-to-End Temperature Coefficient

● 5ppm/°C Ratiometric Temperature Coefficient

● -40°C to +125°C Operating Temperature Range

● 2mm x 2mm, 8-Pin TDFN Package

● I

C-Compatible Serial Interface

Applications

● Portable Electronics

● System Calibration

● Battery-Powered Systems

● Mechanical Potentiometer Replacement

Ordering Information appears at end of data sheet.

19-6393; Rev 2; 11/14

INTERFACE

1.7V TO 5.5V

(CHARGE PUMP ENABLED)

+5V

MAX5395

MAX4250

GND

= 1 + R

MAX5395

SDA

SCL

ADDR0

MAX5395 Single, 256-Tap Volatile, I

C, Low-Voltage Linear

Taper Digital Potentiometer

Typical Operating Circuit

Summary of content (17 pages)

PAGE 1
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 General Description Features The MAX5395 single, 256-tap volatile, low-voltage linear taper digital potentiometer offers three end-toend resistance values of 10kΩ, 50kΩ, and 100kΩ. Potentiometer terminals are independent of supply for voltages up to 5.25V with single-supply operation from 1.7V to 5.5V (charge pump enabled).
PAGE 2
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Absolute Maximum Ratings (All voltages referenced to GND.) VDD .........................................................................-0.3V to +6V H, W, L (charge pump enabled) ...........................-0.3V to +5.5V H, W, L (charge pump disabled)................... -0.3V to the lower of (VDD + 0.3V) or +6V ADDR0...................... -0.3V to the lower of (VDD + 0.3V) or +6V All Other Pins ..........................
PAGE 3
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Electrical Characteristics (continued) (VDD = 1.7V to 5.5V, VH = VDD, VL = GND, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = 1.8V, TA = +25°C.
PAGE 4
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Electrical Characteristics (continued) (VDD = 1.7V to 5.5V, VH = VDD, VL = GND, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = 1.8V, TA = +25°C.) (Note 2) PARAMETER Hold Time for START Condition SYMBOL CONDITIONS MIN TYP MAX UNITS tHD:STA 0.6 µs SCL High Time tHIGH 0.6 µs SCL Low Time tLOW 1.
PAGE 5
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Typical Operating Characteristics (VDD = 1.8V, TA = +25°C, unless otherwise noted.) 25 20 15 10 5 -40 -25 -10 5 20 35 50 65 80 95 110 125 4 MAX5395 toc03 15 TA = -40°C 10 5 0 5 5 4 3 2 1.70 2.65 3.60 4.55 5.
PAGE 6
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Typical Operating Characteristics (continued) (VDD = 1.8V, TA = +25°C, unless otherwise noted.
PAGE 7
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Typical Operating Characteristics (continued) (VDD = 1.8V, TA = +25°C, unless otherwise noted.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 0.16 900 800 VOLTAGE (nVRMS) 0.12 0.10 10kΩ 50kΩ 0.06 10kΩ 600 500 400 300 200 0.04 100 100kΩ 0.1 0.01 1 10 0 100 0.50 0.75 VARIABLE-RESISTOR DNL vs. TAP POSITION (10kΩ) 0.3 0.3 0.1 DNL (LSB) 0.2 0.1 DNL (LSB) 0.2 0 0 -0.1 0 -0.2 -0.2 -0.3 -0.
PAGE 8
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Typical Operating Characteristics (continued) (VDD = 1.8V, TA = +25°C, unless otherwise noted.) 0.3 0.1 0.1 -0.1 DNL (LSB) 0.2 0.1 DNL (LSB) 0.2 0 0 -0.1 0 -0.1 -0.2 -0.2 -0.2 -0.3 -0.3 -0.3 -0.4 -0.4 -0.4 -0.5 -0.5 32 64 96 128 160 192 224 256 0.3 32 64 96 -0.5 128 160 192 224 256 64 96 128 160 192 224 256 TAP POSITION VOLTAGE-DIVIDER INL vs.
PAGE 9
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Pin Configuration TOP VIEW GND 2 ADDR0 3 8 H + L 1 7 W MAX5395 6 VDD EP SDA 4 5 SCL TDFN Pin Description PIN NAME FUNCTION 1 L Low Terminal. The voltage at L can be greater than or less than the voltage at H. Current can flow into or out of L. 2 GND 3 ADDR0 4 SDA I2C Serial Data Input 5 SCL I2C Clock Input 6 VDD Power Supply 7 W Wiper Terminal 8 H High Terminal.
PAGE 10
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Functional Diagram MAX5395 L H GND W ADDRO SDA VDD I2C SCL INTERFACE Detailed Description The MAX5395 single, 256-tap volatile, low-voltage linear taper digital potentiometer offers three end-toend resistance values of 10kΩ, 50kΩ, and 100kΩ. Potentiometer terminals are independent of supply for voltages up to +5.25V with single-supply operation from 1.7V to 5.5V (charge pump enabled).
PAGE 11
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 I2C START and STOP Conditions SDA and SCL idle high when the bus is not in use. A master initiates communication by issuing a START condition. A START condition is a high-to-low transition on SDA with SCL high. A STOP condition is a low-to-high transition on SDA while SCL is high (Figure 2). A START condition from the master signals the beginning of a transmission to the MAX5395.
PAGE 12
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 In read mode, the master pulls down SDA during the 9th clock cycle to acknowledge receipt of data from the MAX5395. An acknowledge is sent by the master after each read byte to allow data transfer to continue. A notacknowledge is sent when the master reads the final byte of data from the MAX5395, followed by a STOP condition. I2C Slave Address Table 1.
PAGE 13
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 read and an acknowledge clock. The master has control of the SCL line but the MAX5395 takes over the SDA line. The final byte in the frame contains the register data readback followed by a STOP condition. If additional bytes beyond those required to read back the requested data are provided, the MAX5395 will continue to read back ones.
PAGE 14
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Table 3.
PAGE 15
MAX5395 Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer SD_L_WREG Command Opens the L terminal and maintains the wiper at the wiper register location. Writes cannot be made to the wiper register while shutdown mode is engaged. Clearing shutdown mode will close the L terminal and allow wiper register to be written. A RST will also deassert shutdown mode and return the wiper to midscale (0x80). This command does not affect the charge-pump status.
PAGE 16
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Ordering Information PIN-PACKAGE INTERFACE TAPS END-TO-END RESISTANCE (kΩ) MAX5395LATA+T 8 TDFN-EP* I2C 256 10 MAX5395MATA+T 8 TDFN-EP* I2C 256 50 MAX5395NATA+T 8 TDFN-EP* I2C 256 100 PART Note: All devices operate over the -40°C to +125°C temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Chip Information PROCESS: BiCMOS www.maximintegrated.
PAGE 17
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer MAX5395 Revision History REVISION NUMBER REVISION DATE 0 7/12 Initial release — 1 9/12 Revised the Absolute Maximum Ratings 2 2 11/14 Removed automotive references from data sheet DESCRIPTION PAGES CHANGED 1, 10 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.