DS1868E-100+T&R datasheet, PDF

Datasheet> All Categories > Analog mixed-signal IC> converter> DS1868E-100+T&R

DS1868E-100+T&R: DescriptionDigital potentiometer IC IC pot digital dual 100k; CategoryAnalog mixed-signal IC converter; File Size275KB，14 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

Download Datasheet Parametric View All

DS1868E-100+T&R Overview

Digital potentiometer IC IC pot digital dual 100k

DS1868E-100+T&R Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	SOIC
package instruction	TSSOP, TSSOP20,.25
Contacts	20
Reach Compliance Code	compli
ECCN code	EAR99
control interface	3-WIRE SERIAL
Converter type	DIGITAL POTENTIOMETER
JESD-30 code	R-PDSO-G20
JESD-609 code	e3
length	6.5 mm
Humidity sensitivity level	1
Number of positions	256
Number of terminals	20
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	TSSOP
Encapsulate equivalent code	TSSOP20,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260
power supply	5 V
Certification status	Not Qualified
resistance law	LINEAR
Maximum seat height	1.1 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
Nominal total resistance	100000 Ω
width	4.4 mm

Preview

Download Datasheet

View All

DS1868

Dual Digital Potentiometer Chip

www.dalsemi.com

FEATURES

Ultra-lowpower consumption, quiet, pumpless

design

Two digitally controlled, 256-position

potentiometers

Serial port provides means for setting and

reading both potentiometers

Resistors can be connected in series to

provide increased total resistance

20-pin TSSOP, 16-pin SOIC, and 14-pin DIP

packages are available.

Resistive elements are temperature

compensated to

±0.3

LSB relative linearity

Standard resistance values:

- DS1868-10

∼

10 kΩ

- DS1868-50

∼

50 kΩ

- DS1868-100

∼

100 kΩ

+5V or ±3V operation

Operating Temperature Range:

- Industrial: -40°C to 85°C

PIN ASSIGNMENT

DNC

RST

CLK

DNC

GND

DNC

OUT

DNC

OUT

W0 RST

L0 CLK

OUT

DQ GND

OUT

20-Pin TSSOP (173-mil)

RST

CLK

GND

DS1868S 16-Pin SOIC (300-mil)

14-Pin DIP (300-mil)

PIN DESCRIPTION

L0, L1

H0, H1

W0, W1

OUT

- Low End of Resistor

- High End of Resistor

- Wiper Terminal of Resistor

- Stacked Configuration Output

RST

- Serial Port Reset Input

- Serial Port Data Input

CLK

- Serial Port Clock Input

OUT

- Cascade Port Output

- +5 Volt Supply

GND

- Ground Connections

- No Internal Connection

- Substrate Bias Voltage

DNC

- Do Not Connect

*All GND pins must be connected to ground.

DESCRIPTION

The DS1868 Dual Digital Potentiometer Chip consists of two digitally controlled solid-state

potentiometers. Each potentiometer is composed of 256 resistive sections. Between each resistive section

and both ends of the potentiometer are tap points which are accessible to the wiper. The position of the

1 of 14

100899

DS1868

wiper on the resistor array is set by an 8-bit value that controls which tap point is connected to the wiper

output. Communication and control of the device is accomplished via a 3-wire serial port interface. This

interface allows the device wiper position to be read or written.

Both potentiometers can be connected in series (or stacked) for an increased total resistance with the same

resolution. For multiple-device, single-processor environments, the DS1868 can be cascaded or daisy

chained. This feature provides for control of multiple devices over a single 3-wire bus.

The DS1868 is offered in three standard resistance values which include 10, 50, and 100 kohm versions.

The part is available in 16-pin SOIC (300-mil), 14-pin DIP, and 20-pin (173-mil) TSSOP packages.

OPERATION

The DS1868 contains two 256-position potentiometers whose wiper positions are set by an 8-bit value.

These two 8-bit values are written to a 17-bit I/O shift register which is used to store the two wiper

positions and the stack select bit when the device is powered. A block diagram of the DS1868 is

presented in Figure 1.

Communication and control of the DS1868 is accomplished through a 3-wire serial port interface that

drives an internal control logic unit. The 3-wire serial interface consists of the three input signals:

RST

CLK, and DQ.

The

RST

control signal is used to enable the 3-wire serial port operation of the device. The

RST

signal is

an active high input and is required to begin any communication to the DS1868. The CLK signal input is

used to provide timing synchronization for data input and output. The DQ signal line is used to transmit

potentiometer wiper settings and the stack select bit configuration to the 17-bit I/O shift register of the

DS1868.

Figure 9(a) presents the 3-wire serial port protocol. As shown, the 3-wire port is inactive when the

RST

signal input is low. Communication with the DS1868 requires the transition of the

RST

input from a low

state to a high state. Once the 3-wire port has been activated, data is entered into the part on the low to

high transition of the CLK signal inputs. Three-wire serial timing requirements are provided in the timing

diagrams of Figure 9(b),(c).

Data written to the DS1868 over the 3-wire serial interface is stored in the 17-bit I/O shift register (see

Figure 2). The 17-bit I/O shift register contains both 8-bit potentiometer wiper position values and the

stack select bit. The composition of the I/O shift register is presented in Figure 2. Bit 0 of the I/O shift

Configuration. Bits 1 through 8 of the I/O shift register contain the potentiometer-1 wiper position value.

Bit 1 will contain the MSB of the wiper setting for potentiometer-1 and bit 8 the LSB for the wiper

setting. Bits 9 through 16 of the I/O shift register contain the value of the potentiometer-0 wiper position

with the MSB for the wiper position occupying bit 9 and the LSB bit 16.

2 of 14

Recommended Resources

Fire pump (dual use and one standby) soft starter control circuit a

Digital answering machine timing circuit

Octal ring counter

TDA1514A power amplifier circuit

555 circuit to prevent loom pattern accidents

Integrated regulated power supply with positive and negative output voltage tracking Part 2

I want information about electromagnetic water meter. Can anyone share it?: Does anyone have information about electromagnetic water meters and gas meters? Please share it with me, or which website has more information on this? I feel like I rarely see posts about meters....; 天天1 Industrial Control Electronics

Only after learning the basics can you start circuit design~: [table=510] [tr][td=680][align=center][align=left] [url=http://www.eechina.com/keyword/%E5%B5%8C%E5%85%A5%E5%BC%8F]Embedded[/url] design is a huge project. Today, let's talk about some precautions in ...; jingcheng FPGA/CPLD

Has anyone used an operating system in a competition?: [i=s]This post was last edited by paulhyde on 2014-9-15 04:03[/i] For example, ucos and the like, it seems that there have not been any questions that are biased towards real-time multitasking. . ....; airqj Electronics Design Contest

Design and implementation of Freescale's intelligent car model starting line recognition method: The design concept and algorithm realization of the parameters of the car model and the track are shown in Figure 1. The main form of the car model's operation is to move within the specified track of...; puddinglove FPGA/CPLD

Share the C language program of FIR filter implemented by MSP430 microcontroller: #include stdio.h #define FRAME180 short int h[19] = {399,-296,-945,-1555,-1503,-285,2112,5061,7503,8450,7503,5061,2112,-285,-1503,-1555,-945,-296,399 }; static short int nBuff[FRAME + 20]; void Lowpas...; 灞波儿奔 Microcontroller MCU

Seeking a solution to expand the Ethernet interface of STM32: The product currently uses STM32F103, and I want to change the communication method to Ethernet. Can you tell me where there is a relevant solution?Thank you!...; daxingxian stm32/stm8

Shortcut: E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF EG EH EI EJ EK EL EM EN EO EP EQ ER ES ET EU EV EW EX EY EZ F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF FG FH FI FJ FK FL FM FN FO FP FQ FR FS FT FU FV FW FX FY FZ G0 G1 G2 G3 G4 G5 G6 G7 G8 G9 GA GB GC GD GE GF GG GH GI GJ GK GL GM GN GO GP GQ GR GS GT GU GV GW GX GZ H0 H1 H2 H3 H4 H5 H6 H7 H8 HA HB HC HD HE HF HG HH HI HJ HK HL HM HN HO HP HQ HR HS HT HU HV HW HX HY HZ I1 I2 I3 I4 I5 I6 I7 IA IB IC ID IE IF IG IH II IK IL IM IN IO IP IQ IR IS IT IU IV IW IX J0 J1 J2 J6 J7 JA JB JC JD JE JF JG JH JJ JK JL JM JN JP JQ JR JS JT JV JW JX JZ K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 KA KB KC KD KE KF KG KH KI KJ KK KL KM KN KO KP KQ KR KS KT KU KV KW KX KY KZ

Popular Components