Datasheet

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

General Description

The MAX5413/MAX5414/MAX5415 is a family of dual

linear taper digital potentiometers. Each device has two

3-terminal potentiometers. The MAX5413/MAX5414/

MAX5415 operate from +2.7V to +5.5V single-supply

voltages and use an ultra-low 0.1µA supply current.

These devices also provide glitchless switching

between resistor taps, as well as a convenient power-

on reset (POR) that sets the wiper to the midscale posi-

tion at power-up. Each potentiometer consists of a fixed

resistor with a wiper contact that is digitally controlled

through a 3-wire serial interface and has 256 tap points.

It performs the same function as a discrete potentiome-

ter or variable resistor.

These parts are ideal for applications requiring digitally

controlled resistors. Three resistance values are avail-

able: 10kΩ (MAX5413), 50kΩ (MAX5414), and 100kΩ

(MAX5415). A nominal resistor temperature coefficient

of 35ppm/°C end-to-end and 5ppm/°C ratiometric make

the MAX5413/MAX5414/MAX5415 ideal for applications

requiring low temperature-coefficient variable resistors,

such as adjustable-gain circuit configurations.

The MAX5413/MAX5414/MAX5415 are available in a 14-

pin TSSOP package. Each device is guaranteed over the

extended industrial temperature range (-40°C to +85°C).

Applications

Mechanical Potentiometer Replacement

Low-Drift Programmable Gain Amplifier (PGA)

Volume Control

LCD Screen Adjustment

Adjustable Voltage Reference

Programmable Filters, Delays, Time Constant

Impedance Matching

Features

♦ 14-Pin TSSOP Small-Footprint Package

♦ 256 Tap Positions

♦ Ultra-Low 0.1µA Supply Current

♦ +2.7V to +5.5V Single-Supply Operation

♦ Two Independent Potentiometers in a Package

♦ Low End-to-End Temperature Coefficient

35ppm/°C

♦ Low Ratiometric Temperature Coefficient

5ppm/°C

♦ Power-On Reset: Wiper Goes to Midscale

(Position 128)

♦ Glitchless Switching Between Resistor Taps

♦ 3-Wire SPI™-Interface Compatible

♦ 10kΩ/50kΩ/100kΩ Resistor Values

MAX5413/MAX5414/MAX5415

Dual, 256-Tap, Low-Drift, Digital Potentiometers

in 14-Pin TSSOP

________________________________________________________________ Maxim Integrated Products 1

GND

TOP VIEW

MAX5413

MAX5414

MAX5415

N.C.

SCLK

DIN

N.C.

TSSOP

Pin Configuration

Ordering Information

19-1943; Rev 0; 1/01

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART TEMP. RANGE PIN-PACKAGE R (kΩ)

MAX5413EUD -40°C to +85°C 14 TSSOP 10

MAX5414EUD -40°C to +85°C 14 TSSOP 50

MAX5415EUD -40°C to +85°C 14 TSSOP 100

SPI is a trademark of Motorola, Inc.

Summary of content (11 pages)

PAGE 1
9-1943; Rev 0; 1/01 Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP Features ♦ 14-Pin TSSOP Small-Footprint Package ♦ 256 Tap Positions ♦ Ultra-Low 0.1µA Supply Current ♦ +2.7V to +5.
PAGE 2
MAX5413/MAX5414/MAX5415 Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V DIN, SCLK, CS .........................................................-0.3V to +6V HX, LX, WX to GND ........................................-0.3V to (VDD +0.3) Maximum Continuous Current into HX, LX, and WX............±1mA Continuous Power Dissipation (TA = +70°C) 14-Pin TSSOP (derate 9.1mW/°C above +70°C) .
PAGE 3
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP (VDD = +5V, unless otherwise noted. VH = VDD, VL = 0, TA = TMIN to TMAX. Typical values are at VDD = +5V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS Input High Voltage VIH Input Low Voltage VIL 0.7 x VDD V Input Leakage Current Input Capacitance 0.3 x VDD V ±1.
PAGE 4
Typical Operating Characteristics (VDD = +5.0V, TA = +25°C, unless otherwise noted.) 240 220 VDD = +5V 200 VDD = +3V 320 300 280 VDD = +5V 260 240 220 180 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 320 300 280 260 240 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 WIPER VOLTAGE (V) WIPER RESISTANCE vs. INPUT CODE (10kΩ) WIPER RESISTANCE vs. INPUT CODE (50kΩ) WIPER RESISTANCE vs.
PAGE 5
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP VARIABLE RESISTOR INL vs. INPUT CODE (50kΩ) DNL (LSB) -0.04 -0.06 -0.08 -0.10 -0.12 -0.14 -0.16 0 32 64 96 -0.20 0 32 96 128 160 192 224 256 0 0.10 0.02 160 192 224 0.07 0.06 256 0.05 0.00 -0.05 0.04 0.03 0.02 0.01 -0.10 0.00 128 0.08 DNL (LSB) INL (LSB) 0.03 96 VOLTAGE-DIVIDER DNL vs. INPUT CODE (50kΩ) 0.05 0.04 64 INPUT CODE (DECIMAL) MAX5413 toc14 0.15 0.01 0.00 -0.15 -0.01 -0.01 -0.20 -0.
PAGE 6
Typical Operating Characteristics (continued) (VDD = +5.0V, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. LOGIC INPUT VOLTAGE MAX5413 toc19 VDD = +5V 0.1 0.01 VDD = +3V VDD = +5V 0.8 SUPPLY CURRENT (µA) 1 SUPPLY CURRENT (mA) 1.0 MAX5413 toc20 SUPPLY CURRENT vs. TEMPERATURE 10 0.6 0.4 VDD = +3V 0.2 0.001 0.0001 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0.
PAGE 7
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP PIN NAME FUNCTION 1 GND 2 LB Low Terminal of Resistor B 3 HB High Terminal of Resistor B Wiper Terminal of Resistor B Ground 4 WB 5, 6, 10 N.C. 7 CS SPI Chip Select 8 DIN SPI Serial Data Input 9 SCLK 11 VDD Power Supply, +2.7V to +5.5V. Connect a 0.1µF capacitor to GND.
PAGE 8
MAX5413/MAX5414/MAX5415 Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP POT REGISTER LOADED CS SCLK 1ST CLOCK PULSE DIN A0 D7 9TH CLOCK PULSE D6 D5 D4 D3 D2 D1 MSB D0 LSB TIME Figure 2. Potentiometer Serial Data Timing Circuit CS ••• tCSO tCSS tCL SCLK tCSW tCS1 tCH tCP tCSH ••• tDS tDH ••• DIN Figure 3.
PAGE 9
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP B0 (A0) DATA WORD B1 (D7) B2 (D6) B3 (D5) B4 (D4) B5 (D3) B6 (D2) B7 (D1) B8 (D0) (MSB) (LSB) First Bit In Last Bit In Figure 4. Serial Data Format VCC R3 VIN HX VOUT WX +5V LX MAX5413 MAX5414 MAX5415 R2 HX V0 MAX4250 WX MAX5413 MAX5414 MAX5415 V0 / IS = R3 (1 + R2/R1) + R2 LX Figure 5.
PAGE 10
MAX5413/MAX5414/MAX5415 Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP Chip Information +5V VIN OUT VOREF TRANSISTOR COUNT: 8689 PROCESS: BiCMOS HX ADJ MAX5413 MAX5414 MAX5415 WX GND LX VOREF = 12.3kV ✕ Ω / (100kΩ ✕ C / 255) FOR MAX5413 VOREF = 61.5kV ✕ Ω / (50kΩ ✕ C / 255) FOR MAX5414 VOREF = 123kV ✕ Ω / (100kΩ ✕ C / 255) FOR MAX5415 WHERE C IS ANY CODE BEING WRITTEN TO A DEVICE. Figure 7.
PAGE 11
Dual, 256-Tap, Low-Drift, Digital Potentiometers in 14-Pin TSSOP TSSOP,NO PADS.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.