Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - Digital potentiometer linear Non-permanent TSSOP 14

General Description

The MAX5389 dual, 256-tap, volatile, low-voltage linear

taper digital potentiometer offers three end-to-end resis-

tance values of 10kΩ, 50kΩ, and 100kΩ. Operating from

a single +2.6V to +5.5V power supply, the device provides

a low 35ppm/°C end-to-end temperature coefficient. The

MAX5389 features an up/down interface.

The small package size, low supply operating voltage,

low supply current, and automotive temperature range

of the MAX5389 make the device uniquely suited for the

portable consumer market and battery backup industrial

applications.

The MAX5389 is specified over the automotive -40°C to

+125°C temperature range and is available in a 14-pin

TSSOP package.

Applications

● Audio Mixing

● Mechanical Potentiometer Replacement

● Low-Drift Programmable Filters and Ampliers

● Adjustable Voltage References/Linear Regulators

● Programmable Delays and Time Constants

● Low-Voltage Battery Applications

Features

● Dual, 256-Tap Linear Taper Positions

● Single +2.6V to +5.5V Supply Operation

● Low (< 1μA) Quiescent Supply Current

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

● Up/Down Interface

● Power-On Sets Wiper to Midscale

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

19-5141; Rev 3; 9/14

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

operating temperature range

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

PART PIN-PACKAGE

END-TO-END

RESISTANCE (kΩ)

MAX5389LAUD+ 14 TSSOP 10

MAX5389MAUD+ 14 TSSOP 50

MAX5389NAUD+ 14 TSSOP 100

U/D

LATCH

256 DECODER

WA LA

POR

UDA

UDB

LATCH

GND

CSA

CSB

INCB

INCA

MAX5389

MAX5389 Dual, 256-Tap, Volatile, Low-Voltage

Linear Taper Digital Potentiometer

Functional Diagram

Ordering Information

EVALUATION KIT AVAILABLE

Summary of content (13 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer General Description Features The MAX5389 dual, 256-tap, volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +2.6V to +5.5V power supply, the device provides a low 35ppm/°C end-to-end temperature coefficient. The MAX5389 features an up/down interface.
PAGE 2
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Absolute Maximum Ratings VDD to GND.............................................................-0.3V to +6V H_, W_, L_ to GND..................................... -0.3V to the lower of (VDD + 0.3V) and +6V All Other Pins to GND..............................................-0.3V to +6V Continuous Current into H_, W_, and L_ MAX5389L.......................................................................... ±5mA MAX5389M........
PAGE 3
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Electrical Characteristics (continued) (VDD = +2.6V to +5.5V, VH_ = VDD, VL_ = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AC PERFORMANCE Crosstalk -3dB Bandwidth Total Harmonic Distortion Plus Noise BW THD+N Wiper Settling Time (Note 6) tS (Note 5) -90 MAX5389L Code = 80H, 10pF load, MAX5389M VDD = +2.
PAGE 4
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer H N.C. W L W L Figure 1. Voltage-Divider and Variable Resistor Configurations Typical Operating Characteristics (VDD = +5V, TA = +25°C, unless otherwise noted.) VDD = 5V 0.7 0.6 0.5 0.4 VDD = 2.6V 0.3 0.2 0.9 0.8 0.7 100 VDD = 2.6V 10 0.5 0.4 0.2 0.1 RESISTANCE (W-TO-L) vs. TAP POSITION (10kΩ) RESISTANCE (W-TO-L) vs.
PAGE 5
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Typical Operating Characteristics (continued) (VDD = +5V, TA = +25°C, unless otherwise noted.) VDD = 5V 110 90 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 WIPER VOLTAGE (V) VARIABLE-RESISTOR DNL vs. TAP POSITION (50kΩ) 0.10 IWIPER = 80µA 0.08 -0.3 0 -0.02 -0.04 -0.06 -0.4 -0.08 -0.10 -40 -25 -10 5 20 35 50 65 80 95 110 125 1.0 0.06 0.6 INL (LSB) DNL (LSB) 0.2 0 -0.02 0 -0.04 -0.4 -0.06 -0.06 -0.6 -0.
PAGE 6
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Typical Operating Characteristics (continued) (VDD = +5V, TA = +25°C, unless otherwise noted.) 0.08 0.06 0.4 0.3 0.04 0.2 0.02 0.02 0.1 0 -0.02 INL (LSB) 0.04 DNL (LSB) 0 -0.02 0 -0.1 -0.04 -0.04 -0.2 -0.06 -0.06 -0.3 -0.08 -0.08 -0.4 -0.10 0 102 153 204 -0.10 255 102 153 204 255 -0.5 0 51 102 153 204 255 TAP POSITION VOLTAGE-DIVIDER INL vs. TAP POSITION (50kΩ) VOLTAGE-DIVIDER INL vs.
PAGE 7
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Typical Operating Characteristics (continued) (VDD = +5V, TA = +25°C, unless otherwise noted.) TAP-TO-TAP SWITCHING TRANSIENT (CODE 127 TO 128) 50kΩ TAP-TO-TAP SWITCHING TRANSIENT (CODE 127 TO 128) 100kΩ MAX5389 toc22 POWER-ON WIPER TRANSIENT (CODE 0 TO 128) MAX5389 toc23 MAX5389 toc24 VW-L 20mV/div VW-L 20mV/div OUTPUT W 2V/div INC 5V/div 400ns/div 1µs/div 2µs/div MIDSCALE FREQUENCY RESPONSE CROSSTALK vs.
PAGE 8
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Pin Configuration TOP VIEW CSA 1 + 14 CSB UDA 2 13 INCA UDB 3 VDD 4 12 INCB MAX5389 11 GND WA 5 10 WB HA 6 9 HB LA 7 8 LB Pin Description PIN NAME FUNCTION 1 CSA Active-Low Register A Chip-Select Input. Drive CSA low to change wiper position WA through INCA and UDA. 2 UDA Register A Up/Down Control Input. With UDA low, a high-to-low transition at INCA decrements the WA position towards LA.
PAGE 9
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Detailed Description The MAX5389 dual, 256-tap, volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. 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 10
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Applications Information Adjustable Dual Linear Regulator Variable Gain Amplifier Figure 3 shows a potentiometer adjusting the gain of a noninverting amplifier. Figure 4 shows a potentiometer adjusting the gain of an inverting amplifier. Figure 5 shows an adjustable dual linear regulator using a dual potentiometer as two variable resistors.
PAGE 11
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Variable Gain Current to Voltage Converter Programmable Filter LCD Bias Control Offset Voltage Adjustment Circuit Figure 7 shows a variable gain current to voltage converter using a potentiometer as a variable resistor. Figure 8 shows a positive LCD bias control circuit using a potentiometer as a voltage-divider. Figure 10 shows a programmable filter using a dual potentiometer.
PAGE 12
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Process Information PROCESS: BiCMOS +5V WA LA HA Package Information VOUT HB WB For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
PAGE 13
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 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; corrected Table 1 and Figure 5 2 11/10 Updated Electrical Characteristics table globals, updated drawings for optimal circuit operation 3 9/14 Removed automotive reference from