Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - Digital potentiometer linear Non-permanent TSSOP 16

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Dual, 256-Tap, Volatile, Low-Voltage,

Linear Taper Digital Potentiometer

MAX5392

19-5122; Rev 2; 11/10

Ordering Information

Functional Diagram

General Description

The MAX5392 dual, 256-tap, volatile, low-voltage, lin-

ear taper digital potentiometer offers three end-to-end

resistance values of 10kI, 50kI, and 100kI. Operating

from a single +1.7V to +5.5V power supply, the device

provides a low 35ppm/NC end-to-end temperature coef-

ficient. The device features an I

C interface.

The small package size, low supply operating voltage,

low supply current, and automotive temperature range

of the MAX5392 makes the device uniquely suited for

the portable consumer market, battery-backup industrial

applications, and the automotive market.

The MAX5392 is specified over the automotive -40NC to

+125NC temperature range and is available in a 16-pin

TSSOP package.

Applications

Low-Voltage Battery Applications

Portable Electronics

Mechanical Potentiometer Replacement

Offset and Gain Control

Adjustable Voltage References/Linear Regulators

Automotive Electronics

Features

S Dual, 256-Tap Linear Taper Positions

S Single +1.7V to +5.5V Supply Operation

S Low 12µA Quiescent Supply Current

S 10kI, 50kI, 100kI End-to-End Resistance Values

S I

C-Compatible Interface

S Wiper Set to Midscale on Power-Up

S -40NC to +125NC Operating Temperature Range

Note: All devices are specified over the -40°C to +125NC oper-

ating temperature range.

+Denotes a lead(Pb)-free/RoHS-compliant package.

EVALUATION KIT

AVAILABLE

PART PIN-PACKAGE

END-TO-END

RESISTANCE (kI)

MAX5392LAUE+ 16 TSSOP 10

MAX5392MAUE+ 16 TSSOP 50

MAX5392NAUE+ 16 TSSOP 100

LATCH

CHARGE

PUMP

BYP

GND

256 DECODER

HA LA

LATCH

POR

SCL

SDA

MAX5392

Summary of content (16 pages)

PAGE 1
9-5122; Rev 2; 11/10 TION KIT EVALUA BLE A IL A V A Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer Features The MAX5392 dual, 256-tap, volatile, low-voltage, linear taper digital potentiometer offers three end-to-end resistance values of 10kI, 50kI, and 100kI. Operating from a single +1.7V to +5.5V power supply, the device provides a low 35ppm/NC end-to-end temperature coefficient. The device features an I2C interface.
PAGE 2
MAX5392 Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70NC) 16-Pin TSSOP (derate 11.1mW/NC above +70NC)....888.9mW Operating Temperature Range . ...................... -40NC to +125NC Junction Temperature .....................................................+150NC Storage Temperature Range............................. -65NC to +150NC Lead Temperature (soldering, 10s).................................
PAGE 3
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer (VDD = +1.7V to +5.5V, VH_ = VDD, VL_ = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +1.8V, TA = +25NC.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AC PERFORMANCE Crosstalk (Note 5) -3dB Bandwidth Code = 80H, 10pF load, VDD = 1.
PAGE 4
MAX5392 Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer ELECTRICAL CHARACTERISTICS (continued) (VDD = +1.7V to +5.5V, VH_ = VDD, VL_ = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +1.8V, TA = +25NC.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN Data Setup Time tSU:DAT 100 Data Hold Time tHD:DAT 0 TYP MAX ns Fs SDA, SCL Rise Time tR 0.3 SDA, SCL Fall tF 0.
PAGE 5
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer SUPPLY CURRENT vs. TEMPERATURE VDD = 2.6V 10 VDD = 1.8V 100 25 VDD = 2.6V 10 20 15 VDD = 1.8V 0 10 1 -40 -20 -10 5 20 35 50 65 80 95 110 125 0 2.7 3.2 3.7 4.2 4.7 VDD (V) RESISTANCE (W_-TO-L_) vs. TAP POSITION (10kI) RESISTANCE (W_-TO-L_) vs. TAP POSITION (50kI) RESISTANCE (W_-TO-L_) vs.
PAGE 6
Typical Operating Characteristics (continued) (VDD = 1.8V, TA = +25°C, unless otherwise noted.) VARIABLE RESISTOR DNL vs. TAP POSITION (50kI) 0.06 0.08 0.06 0.8 0.6 0.4 0.02 0.02 0.2 0 -0.02 INL (LSB) 0.04 DNL (LSB) 0.04 0 -0.02 0 -0.2 -0.04 -0.04 -0.4 -0.06 -0.06 -0.6 -0.08 -0.08 IWIPER = 30µA -0.10 -0.8 IWIPER = 15µA -0.10 51 102 153 204 255 0 51 102 153 204 255 0 102 153 204 TAP POSITION TAP POSITION VARIABLE RESISTOR INL vs.
PAGE 7
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer VOLTAGE-DIVIDER INL vs. TAP POSITION (100kI) VOLTAGE-DIVIDER INL vs. TAP POSITION (50kI) 0.3 MAX5392 toc20 0.4 0.4 0.3 0.2 0.2 0.1 0.1 INL (LSB) INL (LSB) 0.5 MAX5392 toc19 0.5 0 -0.1 0 -0.1 -0.2 -0.2 -0.3 -0.3 -0.4 -0.4 -0.5 -0.
PAGE 8
Typical Operating Characteristics (continued) (VDD = 1.8V, TA = +25°C, unless otherwise noted.) VDD = 5V 0 GAIN (dB) GAIN (dB) 0 -10 VDD = 5V 0 VDD = 1.8V -10 10 GAIN (dB) VDD = 5V 10 MAX5392 toc25 10 MIDSCALE FREQUENCY RESPONSE (100kI) -10 VDD = 1.8V VDD = 1.8V -20 -20 -20 VIN = 1VP-P CW = 10pF VIN = 1VP-P CW = 10pF VIN = 1VP-P CW = 10pF -30 0.1 1 10 100 1000 10,000 -30 0.01 0.1 1 10 1000 10,000 100 FREQUENCY (kHz) FREQUENCY (kHz) CROSSTALK vs.
PAGE 9
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer TOP VIEW HA 1 + 16 VDD WA 2 15 N.C. LA 3 14 SCL HB 4 WB 5 13 SDA MAX5392 12 A0 LB 6 11 A1 BYP 7 10 A2 I.C. 8 9 GND TSSOP Pin Description PIN NAME FUNCTION 1 HA Resistor A High Terminal. The voltage at HA can be higher or lower than the voltage at LA. Current can flow into or out of HA. 2 WA Resistor A Wiper Terminal 3 LA Resistor A Low Terminal.
PAGE 10
MAX5392 Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer Detailed Description The MAX5392 dual, 256-tap, volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kI, 50kI, and 100kI. The potentiometer consists of 255 fixed resistors in series between terminals H_ and L_. The potentiometer wiper, W_, is programmable to access any one of the 256 tap points on the resistor string.
PAGE 11
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer START and STOP Conditions SCL and SDA remain high when the interface is inactive. A master controller signals the beginning of a transmission with a START condition by transitioning SDA from high to low while SCL is high. The master controller issues a STOP condition by transitioning the SDA from low to high while SCL is high, after finishing communicating with the slave. The bus is then free for another transmission. See Figure 2.
PAGE 12
MAX5392 Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer CLOCK PULSE FOR ACKNOWLEDGMENT START CONDITION SCL 1 2 8 9 NOT ACKNOWLEDGE SDA ACKNOWLEDGE Figure 6. Acknowledge ACKNOWLEDGE HOW CONTROL BYTE AND DATA BYTE MAP INTO DEVICE REGISTERS D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 ACKNOWLEDGE S 0 A SLAVE ADDRESS A A COMMAND BYTE P 1 DATA BYTE NOP/W Figure 7.
PAGE 13
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer CYCLE NUMBER COMMAND BYTE 2 3 4 5 6 7 8 A6 A5 A4 A3 A2 A1 A0 W 9 ACK (A) DATA BYTE 10 11 12 13 14 15 16 17 R7 R6 R5 R4 R3 R2 R1 R0 18 ACK (A) 19 20 21 22 23 24 25 26 D7 D6 D5 D4 D3 D2 D1 D0 REG A 0 1 0 1 A2 A1 A0 0 0 0 0 1 0 0 0 1 D7 D6 D5 D4 D3 D2 D1 D0 REG B 0 1 0 1 A2 A1 A0 0 0 0 0 1 0 0 1 0 D7 D6 D5 D4 D3 D2 D1 D0 REG A AND B 0
PAGE 14
MAX5392 Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer Adjustable Voltage Reference Figure 11 shows an adjustable voltage reference circuit using a potentiometer as a voltage-divider. Variable Gain Current to Voltage Converter Figure 12 shows a variable gain current to voltage converter using a potentiometer as a variable resistor. Programmable Filter Figure 15 shows a programmable filter using a dual potentiometer.
PAGE 15
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer WA WB VIN LB LA HA HB VOUT R3 VOUT R1 HA WA HB R2 WB LA LB Figure 15. Programmable Filter Figure 16. Offset Voltage Adjustment Circuit Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only.
PAGE 16
Dual, 256-Tap, Volatile, Low-Voltage, Linear Taper Digital Potentiometer MAX5392 Revision History REVISION NUMBER REVISION DATE 0 1/10 Initial release 1 4/10 Added Soldering Temperature in Absolute Maximum Ratings; corrected code in Conditions of -3dB Bandwidth specification in Electrical Characteristics 2, 3 2 11/10 Changed Electrical Characteristics heading and corrected Figures 9, 12, 14, 15, 16 2, 3, 4, 13, 14, 15 DESCRIPTION PAGES CHANGED — Maxim cannot assume responsibility for use of