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DS1855X-020

Description
Digital Potentiometer, 2 Func, 20000ohm, 2-wire Serial Control Interface, 256 Positions, PBGA14, 0.100 X 0.100 INCH, FCP-14
CategoryAnalog mixed-signal IC    converter   
File Size549KB,21 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric View All

DS1855X-020 Overview

Digital Potentiometer, 2 Func, 20000ohm, 2-wire Serial Control Interface, 256 Positions, PBGA14, 0.100 X 0.100 INCH, FCP-14

DS1855X-020 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeBGA
package instruction0.100 X 0.100 INCH, FCP-14
Contacts14
Reach Compliance Codenot_compliant
ECCN codeEAR99
Other featuresNONVOLATILE MEMORY; OTHER RESISTOR VALUE IS 10000 OHM WITH 100 TAP POSITION
Nominal bandwidth1 kHz
control interface2-WIRE SERIAL
Converter typeDIGITAL POTENTIOMETER
JESD-30 codeR-PBGA-B14
JESD-609 codee0
length2.338 mm
Number of functions2
Number of positions256
Number of terminals14
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeVFBGA
Encapsulate equivalent codeFLIP CHIP
Package shapeRECTANGULAR
Package formGRID ARRAY, VERY THIN PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)NOT SPECIFIED
power supply3/5 V
Certification statusNot Qualified
resistance lawLINEAR
Maximum resistor tolerance20%
Maximum resistor terminal voltage3.3 V
Minimum resistor terminal voltage-0.3 V
Maximum seat height0.841 mm
Nominal supply voltage3 V
surface mountYES
Nominal temperature coefficient750 ppm/°C
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formBALL
Terminal locationBOTTOM
Maximum time at peak reflow temperatureNOT SPECIFIED
Nominal total resistance20000 Ω
width2.109 mm
Base Number Matches1
DS1855
Dual Nonvolatile Digital Potentiometer
and Secure Memory
FEATURES
Two Linear Taper Potentiometers
DS1855-010 (One 10kΩ, 100 Position
and One 10kΩ, 256 Position)
DS1855-020 (One 10kΩ, 100 Position
and One 20kΩ, 256 Position)
DS1855-050 (One 10kΩ, 100 Position
and One 50kΩ, 256 Position)
DS1855-100 (One 10kΩ, 100 Position
and One 100kΩ, 256 Position)
256 Bytes of EEPROM Memory
Access to Data and Potentiometer Control
via a 2-Wire Interface
External Write-Protect Pin to Protect Data
and Potentiometer Settings
Data and Potentiometer Settings Also Can
Be Write Protected Through Software
Control
Nonvolatile Wiper Storage
Operates from 3V or 5V Supplies
14-Pin TSSOP, 16-Ball CSBGA, and
14-Pin Flip-Chip Packages
Industrial Operating Temperature:
-40ºC to +85ºC
PIN CONFIGURATIONS
SDA
SCL
A0
A1
A2
WP
GND
1
2
3
4
5
6
14
13
12
11
10
9
Vcc
H0
W1
H1
L1
W0
L0
7
8
TSSOP (173 mils)
Top View
A
B
C
D
1
2
3
4
CSBGA (4mm x 4mm)
Flip Chip (100 mils x 100 mils) (Not
Shown)
DESCRIPTION
The DS1855 dual nonvolatile (NV) digital potentiometer and secure memory consists of one 100-position
linear taper potentiometer, one 256-position linear taper potentiometer, 256 bytes of EEPROM memory,
and a 2-wire interface. The DS1855, which features a new software write protect, is an upgrade of the
DS1845. The DS1855 provides an ideal method for setting bias voltages and currents in control
applications using a minimum of circuitry. The EEPROM memory allows a user to store configuration or
calibration data for a specific system or device as well as provide control of the potentiometer wiper
settings. Any type of user information may reside in the first 248 bytes of this memory. The next two
addresses of EEPROM memory are for potentiometer settings and the remaining 6 bytes of memory are
reserved. These reserved and potentiometer registers should not be used for data storage. Access to this
EEPROM is via an industry-standard 2-wire bus. The interface I/O pins consist of SDA and SCL. The
wiper position of the DS1855, as well as EEPROM data, can be write protected through hardware using
the write-protect input pin (WP) or software using the 2-wire interface.
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