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부품번호 | MAX5395 기능 |
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기능 | Low-Voltage Linear Taper Digital Potentiometer | ||
제조업체 | Maxim Integrated | ||
로고 | |||
전체 17 페이지수
MAX5395
Single, 256-Tap Volatile, I2C, Low-Voltage Linear
Taper Digital Potentiometer
General Description
The MAX5395 single, 256-tap volatile, low-voltage
linear taper digital potentiometer offers three end-to-
end resistance values of 10kΩ, 50kΩ, and 100kΩ.
Potentiometer terminals are independent of supply for
voltages up to 5.25V with single-supply operation from
1.7V to 5.5V (charge pump enabled). User-controlled
shutdown modes allow the H, W, or L terminal to be
opened with the wiper position set to zero-code, mid-
code, full-code, or the value contained in the wiper
register. Ultra-low-quiescent supply current (< 1µA) can
be achieved for supply voltages between 2.6V and 5.5V
by disabling the internal charge pump and not allowing
potentiometer terminals to exceed the supply voltage by
more than 0.3V. The MAX5395 provides a low 50ppm/°C
end-to-end temperature coefficient and features an I2C
serial interface.
The small package size, low operating supply voltage,
low supply current, and automotive temperature range
of the MAX5395 make the device uniquely suited for the
portable consumer market, battery-backup industrial
applications, and automotive market.
The MAX5395 is available in a lead-free, 8-pin TDFN
(2mm x 2mm) package. The device operates over the
-40°C to +125°C automotive temperature range.
Ordering Information appears at end of data sheet.
Features
S Single Linear Taper 256-Tap Positions
S 10kI, 50kI, and 100kI End-to-End Resistance
S 1.7V to 5.5V Extended Single Supply
S 0 to 5.25V H, W, L Operating Voltage Independent
of VDD
S 1µA (typ) Supply Current in Low-Power Mode
S ±1.0 LSB INL, ±0.5 LSB DNL (max) Wiper Accuracy
S Power-On Sets Wiper to Midscale
S 50ppm/NC End-to-End Temperature Coefficient
S 5ppm/NC Ratiometric Temperature Coefficient
S -40NC to +125NC Operating Temperature Range
S 2mm x 2mm, 8-Pin TDFN Package
S I2C-Compatible Serial Interface
Applications
Portable Electronics
System Calibration
Battery-Powered Systems
Automotive Electronics
Mechanical Potentiometer Replacement
Typical Operating Circuit
ADDR0
SDA
SCL
VDD 1.7V TO 5.5V
(CHARGE PUMP ENABLED) H
MAX5395
I2C
INTERFACE
W
+5V
VS
MAX4250
VO
GND L
R1
VO/ VS = 1 + RMAX5395/R1
For related parts and recommended products to use with this part, refer to: www.maximintegrated.com/MAX5395.related
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6393; Rev 1; 9/12
http://www.Datasheet4U.com
MAX5395
Single, 256-Tap Volatile, I2C, Low-Voltage Linear
Taper Digital Potentiometer
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 1.7V to 5.5V, VH = VDD, VL = GND, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = 1.8V,
TA = +25°C.) (Note 2)
PARAMETER
Hold Time for START Condition
SCL High Time
SCL Low Time
Data Setup Time
Data Hold Time
SDA, SCL Rise Time
SDA, SCL Fall Time
Setup Time for STOP Conditions
Bus Free Time Between STOP
and START Conditions
SYMBOL
tHD:STA
tHIGH
tLOW
tSU:DAT
tHD:DAT
tR
tF
tSU:STO
tBUF
CONDITIONS
MIN TYP MAX UNITS
0.6 µs
0.6 µs
1.3 µs
100 ns
0 µs
0.3 µs
0.3 µs
0.6 µs
1.3 µs
Pulse-Suppressed Spike Width
Capacitive Load for Each Bus
tSP
CB
50 ns
400 pF
Note 2: All devices are production tested at TA = +25°C and are guaranteed by design and characterization for TA = -40°C to
+125°C.
Note 3: DNL and INL are measured with the potentiometer configured as a voltage-divider with VH = 5.25V (QP enabled) or VDD
(QP disabled) and VL = GND. The wiper terminal is unloaded and measured with an ideal voltmeter.
Note 4: R-DNL and R-INL are measured with the potentiometer configured as a variable resistor (Figure 1). H is unconnected and
L = GND.
For charge pump enabled, VDD = 1.7V to 5.5V, the wiper terminal is driven with a source current of 400µA for the 10kΩ
configuration, 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration.
For charge pump disabled and VDD = 5.5V, the wiper terminal is driven with a source current of 400µA for the 10kΩ
configuration, 80µA for the 50kΩ configuration, and 40µA for the 100kΩ configuration.
For charge pump disabled and VDD = 2.6V, the wiper terminal is driven with a source current of 200µA for the 10kΩ
configuration, 40µA for the 50kΩ configuration, and 20µA for the 100kΩ configuration.
Note 5: The wiper resistance is the maximum value measured by injecting the currents given in Note 4 into W with L = GND.
RW = (VW - VH)/IW.
Note 6: Measured at W with H driven with a 1kHz, 0V to VDD amplitude tone and VL = GND. Wiper at midscale with a 10pF load.
Note 7: Wiper-settling time is the worst-case 0-to-50% rise time, measured between tap 0 and tap 127. H = VDD, L = GND, and
the wiper terminal is loaded with 10pF capacitance to ground.
Note 8: Digital Inputs at VDD or GND.
Note 9: An unconnected condition on the ADDR0 pin is sensed via a pullup and pulldown operation. For proper operation, the
ADDR0 pin should be tied to VDD, GND, or left unconnected with minimal capacitance.
Note 10: Digital timing is guaranteed by design and characterization, and is not production tested.
H
W
L
Figure 1. Voltage-Divider and Variable Resistor Configurations
Maxim Integrated
N.C.
W
L
4
http://www.Datasheet4U.com
4페이지 MAX5395
Single, 256-Tap Volatile, I2C, Low-Voltage Linear
Taper Digital Potentiometer
Typical Operating Characteristics (continued)
(VDD = 1.8V, TA = +25NC, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
0.20
0.18
0.16
0.14
0.12
0.10
0.08 10kI 50kI
0.06
0.04
0.02
0
0.01
100kI
0.1 1 10
FREQUENCY (kHz)
100
CHARGE-PUMP FEEDTHROUGH AT W
1000
900
800 50kI 100kI
700
600 10kI
500
400
300
200
100
0
0.50 0.75 1.00 1.25 1.50 1.75 2.00
FREQUENCY (MHz)
VARIABLE-RESISTOR DNL
vs. TAP POSITION (10kI)
0.5
0.4 VDD = 1.8V, VH = 5.0V, CHARGE PUMP ON
0.3
VDD = 2.6V, VH = 2.6V, CHARGE PUMP OFF
VDD = 5.0V, VH = 5.0V, CHARGE PUMP OFF
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
32 64 96 128 160 192 224 256
TAP POSITION
VARIABLE-RESISTOR DNL
vs. TAP POSITION (50kI)
0.5
0.4 VDD = 1.8V, VH = 5.0V, CHARGE PUMP ON
0.3
VDD = 2.6V, VH = 2.6V, CHARGE PUMP OFF
VDD = 5.0V, VH = 5.0V, CHARGE PUMP OFF
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
32 64 96 128 160 192 224 256
TAP POSITION
VARIABLE-RESISTOR DNL
vs. TAP POSITION (100kI)
0.5
0.4 VDD = 1.8V, VH = 5.0V, CHARGE PUMP ON
0.3
VDD = 2.6V, VH = 2.6V, CHARGE PUMP OFF
VDD = 5.0V, VH = 5.0V, CHARGE PUMP OFF
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
32 64 96 128 160 192 224 256
TAP POSITION
VARIABLE-RESISTOR INL
vs. TAP POSITION (10kI)
0.5
0.4
VDD = 2.6V,
VH = 2.6V,
0.3 CHARGE
PUMP OFF
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
VDD = 1.8V, VH = 5.0V, CHARGE PUMP ON
VDD = 5.0V, VH = 5.0V, CHARGE PUMP OFF
-0.5
0 32 64 96 128 160 192 224 256
TAP POSITION
VARIABLE-RESISTOR INL
vs. TAP POSITION (50kI)
0.5
0.4
0.3
0.2 VDD = 2.6V, VH = 2.6V, CHARGE PUMP OFF
0.1
0
-0.1
-0.2
-0.3 VDD = 1.8V, VH = 5.0V, CHARGE PUMP ON
-0.4 VDD = 5.0V, VH = 5.0V, CHARGE PUMP OFF
-0.5
0
32 64 96 128 160 192 224 256
TAP POSITION
VARIABLE-RESISTOR INL
vs. TAP POSITION (100kI)
0.5
0.4
VDD = 1.8V, VH = 5.0V, CHARGE PUMP ON
VDD = 2.6V, VH = 2.6V, CHARGE PUMP OFF
0.3 VDD = 5.0V, VH = 5.0V, CHARGE PUMP OFF
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
32 64 96 128 160 192 224 256
TAP POSITION
Maxim Integrated
7
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |