MAX5417 MAXIM [Maxim Integrated Products], MAX5417 Datasheet

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MAX5417

Manufacturer Part Number
MAX5417
Description
256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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The MAX5417/MAX5418/MAX5419 nonvolatile, linear-
taper, digital potentiometers perform the function of a
mechanical potentiometer, but replace the mechanics
with a simple 2-wire digital interface, allowing communi-
cation with multiple devices. Each device performs the
same function as a discrete potentiometer or variable
resistor and has 256 tap points.
The devices feature an internal, nonvolatile EEPROM
used to store the wiper position for initialization during
power-up. The fast-mode I
face allows communication at data rates up to 400kbps,
minimizing board space and reducing interconnection
complexity in many applications. Each device is available
with one of four factory-preset addresses (see the
Selector Guide) and features an address input for a total
of eight unique address combinations.
The MAX5417/MAX5418/MAX5419 provide three nomi-
nal resistance values: 50kΩ (MAX5417), 100kΩ
(MAX5418), or 200kΩ (MAX5419). The nominal resistor
temperature coefficient is 35ppm/°C end-to-end, and
only 5ppm/°C ratiometric. This makes the devices ideal
for applications requiring a low-temperature-coefficient
variable resistor, such as low-drift, programmable gain-
amplifier circuit configurations.
The MAX5417/MAX5418/MAX5419 are available in a
3mm x 3mm 8-pin TDFN package, and are specified
over the extended -40°C to +85°C temperature range.
19-3185; Rev 2; 8/04
*Future product—contact factory for availability.
**Exposed pad.
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.
MAX5417LETA
MAX5417META*
MAX5417NETA*
MAX5417PETA*
MAX5418LETA
MAX5418META*
MAX5418NETA*
MAX5418PETA*
MAX5419LETA
MAX5419META*
MAX5419NETA*
MAX5419PETA*
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifiers
Volume Control
Liquid-Crystal Display (LCD) Contrast Control
PART
________________________________________________________________ Maxim Integrated Products
General Description
2
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
C™-compatible serial inter-
256-Tap, Nonvolatile, I
Applications
I
2
C ADDRESS
010100A
010101A
010110A
010111A
010100A
010101A
010110A
010111A
010100A
010101A
010110A
010111A
Ordering Information/Selector Guide
0
0
0
0
0
0
0
0
0
0
0
0
♦ Power-On Recall of Wiper Position from
♦ Tiny 3mm x 3mm 8-Pin TDFN Package
♦ 35ppm/°C End-to-End Resistance Temperature
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 50kΩ/100kΩ/200kΩ Resistor Values
♦ Fast I
♦ 500nA (typ) Static Supply Current
♦ Single-Supply Operation: +2.7V to +5.25V
♦ 256 Tap Positions
♦ ±0.5 LSB DNL in Voltage-Divider Mode
♦ ±0.5 LSB INL in Voltage-Divider Mode
I
Purchase of I
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I
ponents in an I
to the I
Pin Configuration appears at end of data sheet.
Digital Potentiometers
2
C is a trademark of Phillips Corp.
GND
Nonvolatile Memory
Coefficient
SDA
SCL
V
DD
A
0
2
C Standard Specification as defined by Philips.
2
C-Compatible Serial Interface
R (kΩ)
INTERFACE
100
100
100
100
200
200
200
200
REGISTER
50
50
50
50
2
SHIFT
8-BIT
C components from Maxim Integrated Products,
I
2
2
C
C system, provided that the system conforms
8
POR
PIN-PACKAGE
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
8 TDFN-EP**
MEMORY
2
Functional Diagram
LATCH
2
8-BIT
8-BIT
NV
C Patent Rights to use these com-
C-Interface,
8
POSITION
DECODER
MAX5417
MAX5418
MAX5419
256-
256
Features
TOP MARK
AMA
ALW
ALU
ALS
ALT
ALV
ALX
ALY
ALZ
AIB
AIC
AID
H
W
L
1

Related parts for MAX5417

MAX5417 Summary of contents

Page 1

... This makes the devices ideal for applications requiring a low-temperature-coefficient variable resistor, such as low-drift, programmable gain- amplifier circuit configurations. The MAX5417/MAX5418/MAX5419 are available in a 3mm x 3mm 8-pin TDFN package, and are specified over the extended -40°C to +85°C temperature range. Mechanical Potentiometer Replacement ...

Page 2

... TC R MAX5417_, 50Ω MAX5418_, 100kΩ MAX5419_, 200kΩ MAX5417_, 50kΩ MAX5418_, 100kΩ MAX5419_, 200kΩ INL 3V, MAX5417_, 50kΩ, DD guaranteed monotonic DNL V = 3V, MAX5418_, 100kΩ DD MAX5419_, 200kΩ 5.25V (Note ...

Page 3

... Digital inputs = V or GND +25°C A During nonvolatile write; digital inputs = V or GND (Note -40°C to +85°C, unless otherwise noted. Typical values are CONDITIONS MAX5417_ t MAX5418_ IL MAX5419_ f SCL t SU-STA t HD-STA t HIGH t LOW 2 C-Interface, = +5V +25°C.) ...

Page 4

Nonvolatile, I Digital Potentiometers TIMING CHARACTERISTICS (continued +2.7V to +5.25V GND +25°C. See Figures 1 and 2.) (Note 7) PARAMETER SYMBOL Data Setup Time t SU-DAT Data Hold ...

Page 5

... Digital Potentiometers Typical Operating Characteristics INL vs. TAP POSITION 0.25 VOLTAGE-DIVIDER MODE 0.20 0.15 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -0.25 256 128 160 192 TAP POSITION MAX5417 toc04 V DD 2V/div W 1V/div C = 10pF L TAP = 128 700 600 500 400 300 200 100 C-Interface, WIPER RESISTANCE vs. TAP POSITION 700 ...

Page 6

... FREQUENCY (Hz) 1.00 0.75 0.50 0.25 -0.25 -0.50 -0.75 -1.00 160 192 224 256 0.3 0.2 0.1 -0.1 -0.2 -0.3 160 192 224 256 INL vs. TAP POSITION (MAX5417) 3.0 VARIABLE-RESISTOR MODE 2 2. 50µA SRC 2.0 1.5 1.0 0.5 0 -0.5 -1.0 100k 128 160 192 TAP POSITION INL vs. TAP POSITION (MAX5419) VARIABLE-RESISTOR MODE 10µA ...

Page 7

... MAX5417 TAP = 128 -5 C -10 - 50pF L -20 -25 -30 256 1 10 100 FREQUENCY (kHz 10pF L 1000 MAX5417 toc20 SDA 2V/div W 10mV/div MAX5418 C = 10pF L FROM TAP 127 TO TAP 128 C-Interface, MIDSCALE WIPER RESPONSE vs. FREQUENCY (MAX5418) 0 MAX5418 TAP = 128 -5 = 10pF L -10 ...

Page 8

... SU-STA Sr The MAX5417/MAX5418/MAX5419 contain a resistor array with 255 resistive elements. The MAX5417 has a total end-to-end resistance of 50kΩ, the MAX5418 has an end-to-end resistance of 100kΩ, and the MAX5419 has an end-to-end resistance of 200kΩ. The MAX5417/MAX5418/MAX5419 allow access to the high, ...

Page 9

... Eight data bits, an address byte, and a con- trol byte program the wiper position. The H and L termi- nals of the MAX5417/MAX5418/MAX5419 are similar to the two end terminals of a mechanical potentiometer. The MAX5417/MAX5418/MAX5419 feature power-on reset circuitry that loads the wiper position from non- volatile memory at power-up ...

Page 10

... Acknowledge slave address is the a write command and high for a no-operation command. The MAX5417/MAX5418/MAX5419 are available in one of four possible slave addresses (Table 1). The first 4 bits (MSBs) of the MAX5417/MAX5418/MAX5419 slave addresses are always 0101. The next 2 bits are factory programmed (see Table 1). Connect the A0 input to either GND or V device addresses for a part ...

Page 11

... NOP/W Figure 8. Command and Single Data Byte Received Message Format for Writing A write to the MAX5417/MAX5418/MAX5419 consists of the transmission of the device’s slave address with the 8th bit set to zero, followed by at least 1 byte of infor- mation (Figure 7). The 1st byte of information is the command byte ...

Page 12

... When the device is not being programmed, it goes into standby mode and power consumption is typically 500nA. Applications Information The MAX5417/MAX5418/MAX5419 are intended for cir- cuits requiring digitally controlled adjustable resis- tance, such as LCD contrast control (where voltage biasing adjusts the display contrast), or for programma- ble filters with adjustable gain and/or cutoff frequency ...

Page 13

... W L Connect the high and low terminals of one potentiometer of a MAX5417 between the NULL inputs of a MAX410 and the wiper to the op amp’s positive supply to nullify the offset voltage over the operating temperature range. Install the other potentiometer in the feedback path to adjust the gain of the MAX410 (see Figure 13) ...

Page 14

Nonvolatile, I Digital Potentiometers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) D PIN 1 INDEX AREA NUMBER OF LEADS SHOWN ARE FOR REFERENCE ...

Page 15

Nonvolatile, I (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 2.90 3.10 E 2.90 3.10 ...

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