General Description
The MAX5432–MAX5435 nonvolatile, linear-taper, digi-tal potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire rial interface. Each device performs the same function as a discrete potentiometer or a variable resis-tor and has 32 tap points.
The MAX5432–MAX5435 feature an internal, nonvolatile,electrically erasable programmable read-only memory (EEPROM) that returns the wiper to its previously stored position at power-up. The fast-mode I 2C †-compatible rial interface allows communication at data rates up to 400kbps, minimizing board space and reducing inter-connection complexity. Each device is available with one of four factory-pret I 2C address (e the Selector Guide ).
U the MAX5432–MAX5435 in applications requiring digitally controlled resistors. Two resistance values are available (50k Ωand 100k Ω) in a voltage-divider or vari-able resistor configuration. The nominal resistor temper-ature coefficient is 35ppm/°C end-to-end, and only 5ppm/°C ratiometric, making the devices ideal for applications requiring a low-temperature-coefficient variable resistor such as low-drift, programmable-gain amplifier circuit configurations.
The MAX5432/MAX5433 are available in a 3mm x 3mm 8-pin TDFN package and the MAX5434/MAX5
435 are avail-able in a 6-pin thin SOT23 package. The MAX5432–MAX5435 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) Screen Adjustment
Features
♦Tiny 3mm x 3mm 8-Pin TDFN and 6-Pin Thin SOT23 Packages ♦Power-On Recall of Wiper Position from Nonvolatile Memory
♦35ppm/°C End-to-End Resistance Temperature Coefficient
♦5ppm/°C Ratiometric Temperature Coefficient ♦50k Ω/100k ΩResistor Values
♦Fast 400kbps I 2C-Compatible Serial Interface ♦500nA (typ) Static Supply Current ♦+2.7V to +5.25V Single-Supply Operation ♦32 Tap Positions
♦±0.15 LSB INL (typ), ±0.15 LSB DNL (typ)
MAX5432–MAX5435
32-Tap, Nonvolatile, I 2C, Linear, Digital
Potentiometers
________________________________________________________________Maxim Integrated Products 1
Ordering Information
19-3511; Rev 1; 12/04
For pricing, delivery, and ordering information,plea contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at
†Purcha of I 2C components from Maxim Integrated Products,
Inc., or one of its sublicend Associated Companies, conveys a licen under the Philips I 2C Patent Rights to u the com-ponents in an I 2C system, provided that the system conforms to the I 2C Standard Specification as defined by Philips.
Selector Guide appears at end of data sheet.
*Future product—contact factory for availability.**EP = Expod pad.
Pin Configurations
爱的风帆M A X 5432–M A X 5435
32-Tap, Nonvolatile, I 2C, Linear, Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
Stress beyond tho listed under “Absolute Maximum Ratings” may cau permanent damage to the device. The are stress ratings only, and functional operation of the device at the or any other conditions beyond tho indicated in the operational ctions of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
V DD -0.3V to +6.0V SDA, SCL -0.3V to +6.0V A0, H, L, and W -0.3V to (V DD + 0.3V)Maximum Continuous Current into H, L, and W
±1.3mA ±0.6mA Input/Output ±50mA
Continuous Power Dissipation (T A = +70°C)
6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C)....727mW 8-Pin TDFN (derate 18.2mW/°C above +70°C)......1454.5mW Operating Temperature Range ...........................-40°C to +85°C Junctio
+150°C Storage -60°C to +150°C Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
MAX5432–MAX5435
32-Tap, Nonvolatile, I 2C, Linear, Digital
Potentiometers
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)
(V = +2.7V to +5.25V, V = V , V = GND, T = -40°C to +85°C, unless otherwi noted. Typical values are at V = +5V, T =
有内涵高冷霸气的句子M A X 5432–M A X 5435
32-Tap, Nonvolatile, I 2C, Linear, Digital Potentiometers 4_______________________________________________________________________________________
TIMING CHARACTERISTICS (continued)
(V DD = +2.7V to +5.25V, V H = V DD , V L = GND, T A = -40°C to +85°C, unless otherwi noted. Typical values are at V DD = +5V, T A =+25°C.) (Figures 1 and 2) (Note 1)
Typical Operating Characteristics
(V DD = +5V, T A = +25°C, unless otherwi noted.)
00.3
0.9
0.6
1.21.5
-40
10
-15
35
60
85
STANDBY SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
S U P P L Y C U R R E N T (µA )
00.2
0.6
0.4
0.81.0
2.5
3.5
3.0
4.0
4.5
5.0
5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
S U P P L Y C U R R E N T (µA )
02135
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
DIGITAL INPUT VOLTAGE (V)
S U P P L
Y C U R R E N T (µA )
1000
0.1
110
100
4Note 2:The DNL and INL are measured with the potentiometer configured as a variable resistor. For the 3-terminal potentiometers
(MAX5432/MAX5433), H is unconnected and L = GND. At V DD = 5V, W is driven with a source current of 80µA for the 50k Ωconfiguration, and 40µA for the 100k Ωconfiguration. At V DD = 3V, W is driven with a source current of 40µA for the 50k Ωconfiguration, and 20µA for the 100k Ωconfiguration.
Note 3:The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = V DD and L = GND
(MAX5432/MAX5433 only). The wiper terminal is unloaded and measured with an ideal voltmeter.
Note 4:Full-scale error is defined as Note 5:Zero-scale error is defined as
Note 6:The wiper resistance is the worst value measured by injecting the currents given in Note 2 into W with L = GND.
R W = (V W - V H ) / I W .
Note 7:The device draws current in excess of the specified supply current when the digital inputs are driven with voltages between
(V DD - 0.5V) and (GND + 0.5V). See the Supply Current vs. Digital Input Voltage graph in the Typical Operating Characteristics .
Note 8:Wiper is at midscale with a 10pF capacitive load. Potentiometer t to midscale, L = GND, an AC source is applied to H,
and the output is measured as 3dB lower than the DC W/H value in dB.
Note 9:This is measured from the STOP pul to the time it takes the output to reach 50% of the output step size (divider mode). It
亲爱的汉修先生is measured with a maximum external capacitive load of 10pF.
Note 10:The programming current exists only during NV writes (12ms typ).
Note 11:Digital timing is guaranteed by design and characterization, and is not production tested.
Note 12:An appropriate bus pullup resistance must be lected depending on board capacitance. Refer to the I 2C-bus specifica-tion document linked to this web address: www./acrobat/literature/9398/39340011.pdf
Note 13:The idle time begins from the initiation of the stop pul.
MAX5432–MAX5435
32-Tap, Nonvolatile, I 2C, Linear, Digital
Potentiometers
_______________________________________________________________________________________5
1.00.5
-0.5
-1.0
-40
10
-15
35
怎么用键盘关机60
85飞机英文怎么读
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
TEMPERATURE (°C)
E N D -T O -E N D R E S I S T A N C E C H A N G E ( %)
1.0
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0.5
-0.5
-
1.0
-40
10
-15
35
苏州医保查询
60
85
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
TEMPERATURE (°C)
E N D -T O -E N D R E S I S T A N C E % C H A N G E
1µs/div
TAP-TO-TAP SWITCHING TRANSIENT
(0 TO MIDSCALE, C L = 10pF)
V W 1V/div
SDA 2V/div
50k Ω
1µs/div
TAP-TO-TAP SWITCHING TRANSIENT
(0 TO MIDSCALE, C L = 10pF)
V W 1V/div
SDA 2V/div
100k Ω
10µs/div
WIPER TRANSIENT AT POWER-ON
V W 1V/div V DD 2V/div
50k Ω
10µs/div
MIDSCALE WIPER TRANSIENT
AT POWER-ON
V W 1V/div
V DD 2V/div
MAX5432–35 toc09
100k Ω
MIDSCALE WIPER RESPONSE
vs. FREQUENCY (MAX5432)
FREQUENCY (kHz)
G A I N (d B )
100101
-15-12-9-6-30-18
0.1
1000
C W = 10pF
C W = 33pF
-18
-12-15-6-3-9
00.11101001000MIDSCALE WIPER RESPONSE vs. FREQUENCY (MAX5433)
FREQUENCY (kHz)
G A I N (d B )
C W = 10pF
C W = 33pF
100300200500600400700
081241620242831
WIPER RESISTANCE vs. TAP POSITION
(MAX5432)
M A X 5432–35 t o c 12
TAP POSITION
R E S I S T A N C E (Ω)V DD = 3V
Typical Operating Characteristics (continued)
(V DD = +5V, T A = +25°C, unless otherwi noted.)
M A X 5432–M A X 5435
32-Tap, Nonvolatile, I 2C, Linear, Digital Potentiometers 6_______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V DD = +5V, T A = +25°C, unless otherwi noted.)
0100300200500600400700
8
12
4
16
20
24
28WIPER RESISTANCE vs. TAP POSITION
(MAX5433)
TAP POSITION
R E S I S T A N C E (Ω)31
100300200500600400700
081241620242831
WIPER RESISTANCE vs. TAP POSITION
(MAX5432)
TAP POSITION
R E S I S T A N C E (Ω)0100
300200500600400700
8
12
4
16
20
24
28WIPER RESISTANCE vs. TAP POSITION
(MAX5433)
TAP POSITION
R E S I S T A N C E (Ω)31
020104090301200
8
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4
16
20
2428W-TO-L RESISTANCE vs. TAP POSITION
TAP POSITION W -T O -L R E S I S T A N C E (k Ω)
1101008060507031-0.5
-0.3-0.4-0.1
-0.20.100.20.40.30.5081241620242831RESISTANCE DNL vs. TAP POSITION
TAP POSITION R E S I S T A N C E D N L (L S B )
-0.5
-0.3-0.4-0.1-0.20.1
00.20.40.30.5
081241620242831
RESISTANCE INL vs. TAP POSITION
TAP POSITION
R E S I S T A N C E I N L (L S B )
