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Part: MAX5405
Category:
Analog & Mixed-Signal Processing
-> Potentiometers
Description: Dual, 256-Tap, Low-Drift, Digital Potentiometers in 10- Max
Company: Maxim Integrated Products
Datasheet: Download MAX5405 datasheet File size : 667 kB
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Datasheet text preview:
19-1934; Rev 1; 4/01
Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX
General Description
The MAX5403/MAX5404/MAX5405 is a family of dual linear taper digital potentiometers. Each device has one 3-terminal potentiometer and one 2-terminal variable resistor (Figure 1). The MAX5403/MAX5404/MAX5405 operate from +2.7V to +5.5V single-supply voltages and use an ultra-low supply current of 0.1µA. These d e v i c e s also provide glitchless switching between resistors taps as well as a convenient power-on reset (POR) that sets the wiper to the midscale position at power-up. The 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 potentiometer or variable resistor. These parts are ideal for applications requiring digitally controlled resistors. Three resistance values are available: 10k (MAX5403), 50k (MAX5404), and 100k (MAX5405). A nominal resistor-temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C ratiometric make the MAX5403/MAX5404/MAX5405 ideal for applications requiring low temperature-coefficient variable resistors, such as adjustable-gain circuit configurations. The MAX5403/MAX5404/MAX5405 are available in a 10pin µMAX package. Each device is guaranteed over the extended industrial temperature range (-40°C to +85°C). o 256-Tap Positions o Ultra Low 0.1µA Supply Current o +2.7V to +5.5V Single-Supply Operation o Low End-To-End Temperature Coefficient: 35ppm/°C o Low Ratiometric Temperature Coefficient: 5ppm/°C o Power-On Reset: Wiper Goes to Midscale (Position 128) o Glitchless Switching Between Resistor Taps o 3-Wire SPITM -Interface Compatible o 10k/50k/100k Resistor Values
Features
o 10-Pin µMAX Small Footprint Package
MAX5403/MAX5404/MAX5405
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
PART MAX5403EUB MAX5404EUB MAX5405EUB
Ordering Information
TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 10 µMAX 10 µMAX 10 µMAX R (k) 10 50 100
Pin Configuration
TOP VIEW
GND 1 LB HB WB 2 3 4 5 10 LA 9 WA VDD SCLK DIN
MAX5403 MAX5404 MAX5405
8 7 6
SPI is a registered trademark of Motorola, Inc.
CS
µMAX
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX MAX5403/MAX5404/MAX5405
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) 10-Pin µMAX (derate 5.6mW/°C above +70°C) ..444mW Operating Temperature Range ...-40°C to +85°C Junction Temperature ......+150°C Storage Temperature Range .....-65°C to +150°C Lead Temperature (soldering, 10s) .........+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(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 Resolution Integral Nonlinearity (Notes 1, 2) Differential Nonlinearity (Notes 1, 2) End-to-End Resistor Tempco Ratiometric Resistor Tempco Full-Scale Error Zero-Scale Error Full-Scale Error Zero-Scale Error Full-Scale Error Zero-Scale Error DC PERFORMANCE (Variable Resistor Mode) Resolution N MAX5403 (Pot A) VDD = +5V Integral Nonlinearity (Notes 1, 3) INL MAX5403 (Pot B) MAX5404 MAX5405 MAX5403 (Pot A) VDD = +3V MAX5403 (Pot B) MAX5404 MAX5405 Differential Nonlinearity (Notes 1, 3) DNL VDD = +5V VDD = +3V VDD = +5V VDD = +3V MAX5403 MAX5404/MAX5405 50 30 275 550 8 ±2.5 ±1 ±1 ±1 ±4.5 ±3 ±1.5 ±1.5 ±1/2 LSB LSB Bits MAX5403 MAX5403 MAX5404 MAX5404 MAX5405 MAX5405 SYMBOL N INL DNL TCR 35 5 -8 +8 -1.6 +1.6 -0.8 +0.8 CONDITIONS MIN 8 ±1/2 ±1/2 TYP MAX UNITS Bits LSB LSB ppm/°C ppm/°C LSB LSB LSB LSB LSB LSB DC PERFORMANCE (Voltage Divider Mode)
DC PERFORMANCE (Resistor Characteristics) Wiper Resistance (Note 4) Wiper Capacitance RW CW pF
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Dual 256-Tap, Low-Drift, Digital Potentiometers in 10-µMAX
ELECTRICAL CHARACTERISTICS (continued)
(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 End-to-End Resistance DIGITAL INPUTS Input High Voltage Input Low Voltage Input Leakage Current Input Capacitance TIMING CHARACTERISTICS (ANALOG) MAX5403 Wiper-Settling Time tS MAX5404 MAX5405 TIMING CHARACTERISTICS (DIGITAL) (Note 5) Maximum SCLK Frequency SCLK Clock Period SCLK Pulse Width High SCLK Pulse Width Low CS Fall to SCLK Rise Setup Time SCLK Rise to CS Rise Hold Time DIN Setup Time DIN Hold Time SCLK Rise to CS Fall Delay CS Rise to SCLK Rise Hold CS Pulse Width High POWER SUPPLIES Supply Voltage Supply Current VDD IDD CS = SCLK = DIN = VDD VDD = +5V VDD = +2.7V 2.7 0.8 0.1 5.5 5 V µA µA tCP tCH tCL tCSS tCSH tDS tDH tCS0 tCS1 tCSW 10 100 40 40 40 0 40 0 10 40 100 MHz ns ns ns ns ns ns ns ns ns ns 100 325 650 ns 5 VIH VIL 0.7 VDD 0.3 VDD ±1.0 V V µA pF SYMBOL MAX5403 RHL MAX5404 MAX5405 CONDITIONS MIN 7.5 37.5 75 TYP 10 50 100 MAX 12.5 62.5 125 k UNITS
MAX5403/MAX5404/MAX5405
Note 1: Linearity is defined in terms of the HX to LX code-dependent resistance. Note 2: The DNL and INL are measured with the potentiometer configured as a voltage divider with HX = VDD and LX = 0. The wiper terminal is unloaded and measured with an ideal voltmeter. Note 3: The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometer (Pot A), HA is unconnected and LA = 0. For the 2-terminal potentiometer (Pot B), only LB = 0. At VDD = +5V, the wiper terminal is driven with a source current of 400µA for the 10k configuration, 80µA for the 50k configuration, and 40µA for the 100k configuration. At VDD = +3V, 200µA/40µA/20µA for 10k/50k/100k configuration respectively. Note 4: The wiper resistance is the worst value measured by injecting into WX, a current IW = VDD / RHL. Note 5: Digital timing is guaranteed by design.
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