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PDF MAX5417 Data sheet ( Hoja de datos )
| Número de pieza | MAX5417 | |
| Descripción | 256-Tap Nonvolatile I2C-Interface Digital Potentiometers | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3185; Rev 3; 3/09
www.DataSheet4U.com
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
General Description
The MAX5417/MAX5418/MAX5419 nonvolatile, linear-
taper, digital potentiometers perform the function of a
mechanical potentiometer by replacing 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 I2C-compatible serial interface
allows communication at data rates up to 400kbps, mini-
mizing board space and reducing interconnection com-
plexity 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.
Applications
Mechanical Potentiometer Replacement
Low-Drift Programmable-Gain Amplifiers
Volume Control
Liquid-Crystal Display (LCD) Contrast Control
Features
♦ Power-On Recall of Wiper Position from
Nonvolatile Memory
♦ Tiny 3mm x 3mm 8-Pin TDFN Package
♦ 35ppm/°C End-to-End Resistance Temperature
Coefficient
♦ 5ppm/°C Ratiometric Temperature Coefficient
♦ 50kΩ/100kΩ/200kΩ Resistor Values
♦ Fast I2C-Compatible Serial Interface
♦ 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
Functional Diagram
VDD
GND
8-BIT 8
SHIFT
REGISTER
8-BIT 8
LATCH
256-
POSITION
256
DECODER
SDA
SCL
A0
I2C POR
INTERFACE
8-BIT
NV
MEMORY
MAX5417
MAX5418
MAX5419
H
W
L
PART
TEMP RANGE
MAX5417LETA
-40°C to +85°C
MAX5417META*
-40°C to +85°C
MAX5417NETA*
-40°C to +85°C
MAX5417PETA*
-40°C to +85°C
MAX5418LETA
-40°C to +85°C
MAX5418META*
-40°C to +85°C
MAX5418NETA*
-40°C to +85°C
MAX5418PETA*
-40°C to +85°C
MAX5419LETA
-40°C to +85°C
MAX5419META*
-40°C to +85°C
MAX5419NETA*
-40°C to +85°C
MAX5419PETA*
-40°C to +85°C
*Future product—contact factory for availability.
**Exposed pad.
Ordering Information/Selector Guide
I2C ADDRESS
010100A0
010101A0
010110A0
010111A0
010100A0
010101A0
010110A0
010111A0
010100A0
010101A0
010110A0
010111A0
R (kΩ)
50
50
50
50
100
100
100
100
200
200
200
200
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**
TOP MARK
AIB
ALS
ALT
ALU
AIC
ALV
ALW
ALX
AID
ALY
ALZ
AMA
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
www.DataSheet4U.com
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
(VDD = +5V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
DNL 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
0
32 64 96 128 160 192 224 256
TAP POSITION
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
0
32 64 96 128 160 192 224 256
TAP POSITION
WIPER RESISTANCE vs. TAP POSITION
700
VDD = 2.7V
600 ISRC = 50µA
500
400
300
200
100
0
0 32 64 96 128 160 192 224 256
TAP POSITION
WIPER TRANSIENT AT POWER-ON
MAX5417 toc04
VDD
2V/div
W
1V/div
4µs/div
CL = 10pF
TAP = 128
H = VDD
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-40
-15 10 35 60
TEMPERATURE (°C)
85
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
1.0
0.8
0.6
0.4
0.2
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
WIPER RESISTANCE vs. TEMPERATURE
700
600
VDD = 2.7V
500
400 VDD = 3.0V
300 VDD = 4.5V
200 VDD = 5.25V
100
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
_______________________________________________________________________________________ 5
5 Page 
www.
256-Tap, Nonvolatile, I2C-Interface,
Digital Potentiometers
D
CONTROL BYTE IS STORED ON RECEIPT OF STOP CONDITION
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
D15 D14 D13 D12 D11 D10 D9 D8
S SLAVE ADDRESS
0A
CONTROL BYTE
AP
NOP/W
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
Figure 7. Command Byte Received
HOW CONTROL BYTE AND DATA BYTE MAP INTO
MAX5417/MAX5418/MAX5419 REGISTERS
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
D15 D14 D13 D12 D11 D10 D9 D8
ACKNOWLEDGE FROM
MAX5417/MAX5418/MAX5419
D7 D6 D5 D4 D3 D2 D1 D0
S SLAVE ADDRESS
0A
CONTROL BYTE
A
DATA BYTE
A
P
NOP/W
1 BYTE
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. The bytes received after the command
byte are the data bytes. The 1st data byte goes into the
internal register of the MAX5417/MAX5418/MAX5419 as
selected by the command byte (Figure 8).
Command Byte
Use the command byte to select the source and desti-
nation of the wiper data (nonvolatile or volatile memory
registers) and swap data between nonvolatile and
volatile memory registers (see Table 2).
Command Descriptions
VREG: The data byte writes to the volatile memory reg-
ister and the wiper position updates with the data in the
volatile memory register.
NVREG: The data byte writes to the nonvolatile memo-
ry register. The wiper position is unchanged.
NVREGxVREG: Data transfers from the nonvolatile
memory register to the volatile memory register (wiper
position updates).
VREGxNVREG: Data transfers from the volatile memo-
ry register into the nonvolatile memory register.
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX5417.PDF ] | |
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