MAX5395 MAXIM [Maxim Integrated Products], MAX5395 Datasheet

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MAX5395

Manufacturer Part Number
MAX5395
Description
Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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 I
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
For related parts and recommended products to use with this part, refer to:
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.
Single, 256-Tap Volatile, I
appears at end of data sheet.
General Description
ADDR0
SDA
SCL
V
DD
GND
(CHARGE PUMP ENABLED)
INTERFACE
I
2
1.7V TO 5.5V
C
MAX5395
Taper Digital Potentiometer
2
C
H
L
www.maxim-ic.com/MAX5395.related
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
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 I
V
O
of V
2
2
/ V
W
C-Compatible Serial Interface
S
C, Low-Voltage Linear
= 1 + R
DD
Portable Electronics
System Calibration
Battery-Powered Systems
Automotive Electronics
Mechanical Potentiometer Replacement
MAX5395
V
S
R1
/R
Typical Operating Circuit
1
MAX4250
+5V
V
O
MAX5395
Applications
19-6393; Rev 0; 7/12
Features
1

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MAX5395 Summary of contents

Page 1

... 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° ...

Page 2

... Charge pump enabled, 1.7V < Charge pump disabled, 2.6V < Low-Voltage Linear = +70NC) A MIN TYP 256 -1.0 -0 GND < 5.5V -0.5 DD MAX5395M -0.5 MAX5395N MAX5395L -1.0 < 5.5V DD MAX5395M MAX5395N MAX5395L < 5.5V -1.0 DD MAX5395M -1.0 MAX5395N MAX5395L -1.5 -0.5 < 5. < 5.5V DD MAX5395 = 1.8V, DD MAX UNITS Tap +1.0 LSB +0.5 LSB 5 ppm/°C LSB +0.5 LSB +0.5 +1.0 +1.0 +1.0 LSB +1.5 +0 ...

Page 3

... V IH 1.7V < V < 2.6V DD 2.6V < V < 5. 1.7V < V < 2. (Note 9) PUR PD f SCL t SU:STA MAX5395 C, Low-Voltage Linear MIN TYP -25 1600 10kΩ 340 50kΩ 165 100kΩ 0.035 190 10kΩ 400 50kΩ 664 100kΩ 600 1.7 < ...

Page 4

... Low-Voltage Linear MIN TYP 0.6 0.6 1.3 100 0 0.6 1.3 50 400 = 5.25V (QP enabled (Figure 1 unconnected and = GND. Wiper at midscale with a 10pF load MAX5395 = 1.8V, DD MAX UNITS µs µs µs ns µs 0.3 µs 0.3 µs µs µ -40° GND, and DD 4 ...

Page 5

... TAP POSITION WIPER RESISTANCE vs. WIPER VOLTAGE 1.8V 4.5 5.0 0 0.5 1.0 1.5 2.0 2.5 3.0 WIPER VOLTAGE (V) MAX5395 C, Low-Voltage Linear SUPPLY CURRENT vs. INPUT VOLTAGE +125°C A (LOW-HIGH 3.3V DD (HIGH-LOW 1. -40° (LOW-HIGH) ...

Page 6

... POWER-ON TRANSIENT (100k V W-L 1V/div V DD 1V/div 10µs/div MIDSCALE FREQUENCY RESPONSE (100kI - 10pF -30 10M 0.01k 0.1k 1k 10k 100k FREQUENCY (Hz) ) Ω MAX5395 toc11 V W-L 10mV/div V SCL 2V/div ) Ω MAX5395 toc12c V W-L 1V/div V DD 1V/div 10M 6 ...

Page 7

... 2.6V 0 5.0V 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 192 224 256 MAX5395 2.00 = 5.0V, CHARGE PUMP 2.6V, CHARGE PUMP OFF H = 5.0V, CHARGE PUMP OFF H 96 128 160 192 224 256 TAP POSITION = 5.0V, CHARGE PUMP 2.6V, CHARGE PUMP OFF H = 5.0V, CHARGE PUMP OFF H 96 128 160 192 224 ...

Page 8

... CHARGE PUMP 0 2.6V 2.6V, CHARGE PUMP OFF 5.0V 5.0V, CHARGE PUMP OFF DD H 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 256 128 160 TAP POSITION MAX5395 VOLTAGE-DIVIDER DNL vs. TAP POSITION (100kI) 0 1.8V 5.0V, CHARGE PUMP 0 2.6V 2.6V, CHARGE PUMP OFF 5.0V 5.0V, CHARGE PUMP OFF DD H 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 192 ...

Page 9

... High Terminal. The voltage at H can be greater than or less than the voltage at L. Current can flow into out of H. — EP Exposed Pad. Internally connected to GND. Connect to ground Low-Voltage Linear Taper Digital Potentiometer TOP VIEW GND MAX5395 3 V ADDR0 SDA 4 SCL 5 TDFN FUNCTION , GND, or open. DD MAX5395 Pin Configuration Pin Description 9 ...

Page 10

... Each transmit sequence is framed by a START (S) or Repeated START (Sr) condition and a STOP (P) condi- tion. Each word transmitted to the MAX5395 is 8 bits long and is followed by an acknowledge clock pulse. A master reading data from the MAX5395 must transmit the proper slave address followed by a series of nine SCL pulses for each byte of data requested ...

Page 11

... The aborted MAX5395 I have no effect on the part. In write mode, the acknowledge bit (ACK clocked 9th bit that the MAX5395 uses to handshake receipt of each byte of data as shown in pulls down SDA during the entire master-generated 9th clock pulse if the previous byte is successfully received. ...

Page 12

... Repeated START condition and a STOP condition. Each word is 8 bits long and is followed by an acknowledge clock pulse as shown in the address of the MAX5395 with R indicate a write. The second byte contains the register that read back. There is a Repeated START condition, ...

Page 13

... Single, 256-Tap Volatile read and an acknowledge clock. The master has con- trol of the SCL line but the MAX5395 takes over the SDA line. The final byte in the frame contains the register data readback followed by a STOP condition. If additional bytes beyond those required to read back the requested data are provided, the MAX5395 will continue to read back ones ...

Page 14

... Clearing shutdown mode will return the wiper to the position contained in the wiper register and close the H terminal. A RST will also deassert shutdown mode and return the wiper to midscale (0x80). This command does not affect the charge-pump status. MAX5395 DATA BYTE ...

Page 15

... This is the power-on default condition. Low supply voltage is 1.7V. Returns the device to power-on default conditions. Resets the wiper register to midscale (0x80), enables charge pump, and deasserts any shutdown modes. SD_L_FULL Command MAX5395 C, Low-Voltage Linear QP_OFF Command QP_ON Command SD_W Command RST Command ...

Page 16

... RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE PACKAGE TYPE CODE 8 TDFN-EP T822+2 MAX5395 END-TO-END RESISTANCE (kI 100 OUTLINE LAND NO. ...

Page 17

... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2012 Maxim Integrated Products 2 C, Low-Voltage Linear Taper Digital Potentiometer DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products Inc. MAX5395 Revision History PAGES CHANGED — 17 ...

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