DS3930

DS3930 DALLAS | Alldatasheet

Document overview

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Technical content

Features

♦ Six 256-Position NV Potentiometers ♦ Four General-Purpose NV I/O Pins ♦ 64 Bytes of User EEPROM Memory ♦ 0 to 5.5V on Any Potentiometer Terminal, Independent of VCC ♦ All Six Potentiometers Share a Common Low Side ♦ Potentiometers Separated into Two Groups of Three Potentiometers, Each Sharing a Common High Side ♦ 2-Wire Serial Interface ♦ Wide Supply Range (2.7V to 5.5V) ♦ Up to Eight DS3930s Can Share the Same 2-Wire Bus DS3930 Hex Nonvolatile Potentiometer with I/O and Memory HI 0-2 W2SDA TOP VIEW LO0-5 HI3-5 W4I/O2 I/O1 I/O0 SCL I/O3GND VCC TSSOP DS3930 Pin Configuration SDA GND SCL I/O3 I/O2 I/O1 I/O0 LO0-5 HI0-2 HI3-5 VCC VCC VCC VCC DECOUPLING CAP 0.1µF 2-WIRE INTERFACE 4.7kΩ 4.7kΩ DIGITAL NONVOLATILE I/O DIGITAL NONVOLATILE I/O WIPER TERMINALS WIPER TERMINALS DS3930 Typical Operating Circuit

Ordering Information

Rev 0; 4/03 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. PART PIN-PACKAGE DS3930E 20 TSSOP

Hex Nonvolatile Potentiometer with I/O and Memory ABSOLUTE MAXIMUM RATINGS RECOMMENDED DC OPERATING CONDITIONS (TA = -40° to +85°C) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Voltage on I/O0, I/O1, I/O2, I/O3, SDA, SCL, A0, A1, and A2 Voltage on LO0-5, W0-5, HI0-2, and HI3-5 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V CC (Note 1) +2.7 +5.5 V Input Logic 1 (SDA, SCL, A0, A1, A2, I/O0, I/O1, I/O2, I/O3) VIH 0.7 x VCC VCC + 0.3 V Input Logic 0 (SDA, SCL, A0, A1, A2, I/O0, I/O1, I/O2, I/O3) VIL -0.3 0.3 x VCC V Wiper Current I W -1 +1 mA Potentiometer Terminals (LO0-5, W0-5, HI0-2, and HI3-5) VCC = +2.7V to +5.5V -0.3 +5.5 V DC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +5.5V; TA = -40°C to +85°C, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Leakage I IL -1 +1 µA VOL1 3mA sink current 0 0.4 VLow-Level Output Voltage (SDA, I/O0, I/O1, I/O2, I/O3) VOL2 6mA sink current 0 0.6 V I/O Capacitance C I/O 10 pF I/O Pullup Resistor Value R I/O 3.5 5 7.0 k Ω 3V (Note 2) 160 300Standby Current ISTBY 5V (Note 2) 195 350 µA *This voltage must not exceed 6.0V.

Hex Nonvolatile Potentiometer with I/O and Memory AC ELECTRICAL CHARACTERISTICS (VCC = +2.7V to +5.5V; TA = -40°C to +85°C, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Fast mode 0 400SCL Clock Frequency (Note 3) f SCL Standard mode 0 100 kHz Fast mode 1.3Bus Free Time Between STOP and START Condition (Note 3) tBUF Standard mode 4.7 µs Fast mode 0.6Hold Time (Repeated) START Condition (Notes 3 and 4) tHD:STA Standard mode 4.0 µs Fast mode 1.3Low Period of SCL Clock (Note 3) tLOW Standard mode 4.7 µs Fast mode 0.6High Period of SCL Clock (Note 3) tHIGH Standard mode 4.0 µs ANALOG RESISTOR CHARACTERISTICS (VCC = +2.7V to +5.5V; TA = -40°C to +85°C, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS End-to-End Resistance T A = +25°C (three 50kΩ pots in parallel) 13.2 16.5 19.8 kΩ Wiper Resistance R W 400 1000 Ω Factory Default Wiper Setting FF Hex Factory Default I/O Setting 0F Hex POT-to-POT Matching -1 +1 LSB Differential Linearity -0.5 +0.5 LSB Integral Linearity -1 +1 LSB End-to-End Temperature Coefficient 3 potentiometers in parallel -250 0 +250 ppm/°C Ratiometric Temperature Coefficient 2 ppm/°C

Hex Nonvolatile Potentiometer with I/O and Memory Note 1: All voltages are referenced to ground. Note 2: ISTBY specified for VCC equal 3.0V and 5.0V, SDA = SCL = VCC, and I/O0 = I/O1 = I/O2 = I/O3 = A0 = A1 = A2 = GND. Note 3: A fast-mode device can be used in a standard-mode system, but the requirement tSU:DAT > 250ns must then be met. This is automatically the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to the SDA line tRMAX + tSU:DAT = 1000ns +250ns = 1250ns before the SCL line is released. Note 4: After this period, the first clock pulse is generated. Note 5: The maximum tHD:DAT has only to be met if the device does not stretch the LOW period (tLOW) of the SCL signal. Note 6: A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the VIH MIN of the SCL sig- nal) in order to bridge the undefined region of the falling edge of SCL. Note 7: CB—total capacitance of one bus line in picofarads, timing referenced to 0.9V CC and 0.1VCC. Note 8: EEPROM write begins after a STOP condition occurs. AC ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +5.5V; TA = -40°C to +85°C, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Fast mode 0 0.9Data Hold Time (Notes 3, 5, 7) tHD:DAT Standard mode 0 0.9 µs Fast mode 100Data Setup Time (Note 3) tSU:DAT Standard mode 250 ns Fast mode 0.6Start Setup Time (Note 3) t SU:STA Standard mode 4.7 µs Fast mode 20 + 0.1CB 300Rise Time of Both SDA and SCL Signals (Note 7) tR Standard mode 20 + 0.1CB 1000 ns Fast mode 20 + 0.1CB 300Fall Time of Both SDA and SCL Signals (Note 7) tF Standard mode 20 + 0.1CB 300 ns Fast mode 0.6Setup Time for STOP Condition tSU:STO Standard mode 4.0 µs Capacitive Load for Each Bus CB (Note 7) 400 pF EEPROM Write Time t W (Note 8) 5 20 ms EEPROM CHARACTERISTICS (VCC = +2.7V to +5.5V; TA = -40°C to +85°C, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Writes +70°C 50,000

Hex Nonvolatile Potentiometer with I/O and Memory VOLTAGE DIVIDER % CHANGE FROM +25°C vs. TEMPERATURE DS3930 toc06 TEMPERATURE (°C) RESISTANCE % CHANGE (FROM +25°C) 8060-20 0 20 40 -0.15 -0.10 -0.05 0.05 0.10 0.15 0.20 -0.20 -40 100 HI = VCC LO0-5 = GND POSITION 127 END-TO-END RESISTANCE % CHANGE FROM +25°C vs. TEMPERATURE DS3930 toc05 TEMPERATURE (°C) RESISTANCE % CHANGE (FROM +25°C) 806020 400-20 -0.80 -0.60 -0.40 -0.20 0.20 0.40 0.60 0.80 1.00 -1.00 -40 100

3 POTS IN PARALLEL

MEASURED FROM HI0-2 TO LO0-5 WIPER VOLTAGE vs. POWER-UP VOLTAGE DS3930 toc04 POWER-UP VOLTAGE (V) WIPER VOLTAGE (V) 0.5 1.0 1.5 2.0 2.5 3.0 0 5.0 HI = 5V, LO = GND POSITION 127 EEPROM RECALL FOLLOWS VCC CHANGES TO PROGRAMMED VALUE ONCE EEPROM IS RECALLED ACTIVE SUPPLY CURRENT vs. SCL FREQUENCY DS3930 toc03 SCL FREQUENCY (kHz) SUPPLY CURRENT (µA) 300200100 260 320 380 440 500 560 620 680 740 200 0 400 VCC = 5V VCC = 3V SDA = VCC WIPER VOLTAGE vs. WIPER SETTING DS3930 toc02 SETTING (DEC) VOLTAGE (V) 25020015010050 0 300 HI = 5V LO = GND SUPPLY CURRENT vs. TEMPERATURE DS3930 toc01 TEMPERATURE (°C) SUPPLY CURRENT (µA) 806040200-20 140 160 180 200 220 120 -40 100 VCC = 5V VCC = 3V SDA = SCL = 5V Typical Operating Characteristics (VCC = 5.0V; TA = +25°C, unless otherwise specified.) ALL POTS DNL (LSB) DS3930 toc08 POSITION (DEC) DNL (LSB) 225200150 17550 75 100 12525 -0.08 -0.06 -0.04 -0.02 0.02 0.04 0.06 0.08 0.10 -0.10 0 250 POTS 1, 3, 5 INL (LSB) DS3930 toc09 POSITION (DEC) INL (LSB) 225200150 17550 75 100 12525 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.5 -0.5 0 250 POTS 0, 2, 4, INL (LSB) DS3930 toc07 POSITION (DEC) INL (LSB) 225200150 17550 75 100 12525 -0.4 -0.3 -0.2 -0.1 0.1 0.2 0.3 0.4 0.5 -0.5 0 250

1A 0 Address Input. The address input pins determine the 2-wire address of the device. 2A 1 Address Input 3A 2 Address Input 4 SDA 2-Wire Serial Data I/O. This pin is for serial data transfer to and from the device. 5 SCL 2-Wire Serial Clock Input. The serial clock input is used to clock data into and out of the device.

6 I/O0 General-Purpose NV I/O Pin

7 I/O1 General-Purpose NV I/O Pin

8 I/O2 General-Purpose NV I/O Pin

10 GND Ground

11 I/O 3 General-Purpose NV I/O Pin

12 W 5 Wiper Terminal of Potentiometer 5

13 W 4 Wiper Terminal of Potentiometer 4

14 W 3 Wiper Terminal of Potentiometer 3

15 HI 3-5

High-End Terminal of Potentiometers 3 to 5. This is the common high-side terminal of potentiometers 3, 4, and 5.

16 LO 0-5

Low-End Terminal of the Potentiometers. This is the common low-side terminal of all six potentiometers.

17 W 2 Wiper Terminal of Potentiometer 2

18 W 1 Wiper Terminal of Potentiometer 1

19 W 0 Wiper Terminal of Potentiometer 0

20 HI 0-2

High-End Terminal of Potentiometers 0 to 2. This is the common high-side terminal of potentiometers 0, 1, and 2. DS3930 Hex Nonvolatile Potentiometer with I/O and Memory

EEPROM registers through the 2-wire interface.

64 BYTES OF

Figure 1. DS3930 Functional Diagram

ROM, the number of writes is limited. The memory map is shown in Table 2. Table 2. Memory Map

11 Pullup disabled (HI-Z)

Table 1. I/O Pin Truth Table

acknowledges with a ninth bit. defined. The DS3930 works in both modes. generate the stop condition. byte, a not acknowledge can be returned. next serial transfer, the bus is not released. and handled as in the slave receiver mode. lowing the start condition from the master device. The slave address consists of a 4-bit control code. Figure 4. Slave Address

Hex Nonvolatile Potentiometer with I/O and Memory Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circu it patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Wiper Resistance One difference between digital potentiometers and mechanical potentiometers is the wiper resistance. The wiper resistance (R W) is a result of the interconnecting materials on the IC between the internal resistive ele- ments and the wiper pin. This can be modeled by using an ideal potentiometer, with a resistance of R W con- nected between the ideal wiper and wiper terminal of the digital potentiometer. Chip Information TRANSISTOR COUNT: 27,000 SUBSTRATE CONNECTED TO GROUND.

Package Information

For the latest package outline information, go to www.maxim-ic.com/DallasPackInfo.