ds3908nt-r Maxim Integrated Products, Inc., ds3908nt-r Datasheet

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ds3908nt-r

Manufacturer Part Number
ds3908nt-r
Description
Ds3908 Dual 64-position Nonvolatile Digital Potentiometer With Buffered Output
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS3908NT-R.pdf (11 pages)
The DS3908 contains two nonvolatile digital poten-
tiometers with programmable-gain amplifiers buffering
the wiper outputs. The potentiometer position and
amplifier gain are controlled through an I
ble serial bus. The DS3908 operates in both 3.3V and
5V systems and features a write-protect pin that locks
the position of the potentiometers and gain registers. Up
to eight DS3908s can be placed on a single I
Rev 0; 4/06
I
Associated Companies, conveys a license under the Philips I
that the system conforms to the I
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.
2
C is a trademark of Philips Corp. Purchase of I
V
CC
Pin-Diode Biasing
Power-Supply Calibration
Cell Phones and PDAs
Portable Electronics
SDA
SCL
WP
A0
A1
A2
INTERFACE
Typical Operating Circuit
DS3908
I
2
C
General Description
POT0
POT1
Potentiometer with Buffered Outputs
2
Dual, 64-Position Nonvolatile Digital
C Standard Specification as defined by Philips.
PGA0
PGA1
Applications
______________________________________________ Maxim Integrated Products
H0
V0
L0
H1
V1
L1
2
C*-compati-
2
2
REFERENCE
C bus.
NV ADJUSTABLE
REFERENCE
VOLTAGE
C components from Maxim Integrated Products, Inc., or one of its sublicensed
NV ADJUSTABLE
REFERENCE
VOLTAGE
VOLTAGE
2
C Patent Rights to use these components in an I
o Two 64-Position Linear Taper Potentiometers
o Integral Wiper Buffering Amplifiers with
o 100kΩ Potentiometer End-to-End Resistance
o Low Potentiometer Temperature Coefficient
o Nonvolatile Wiper and Gain Storage
o I
o Write-Protect Pin Prevents Accidental Field
o 3V to 5.5V Supply Voltage Range
o -40°C to +85°C Operating Temperature Range
o 14-Pin TDFN Package
+Denotes lead-free package.
DS3908N+
Selectable Gains of 1V/V, 2V/V, or 4V/V
Reprogramming
2
TOP VIEW
C-Compatible Interface
PART
GND
SDA
SCL
WP
A0
A1
A2
1
2
3
4
5
6
7
TDFN (3mm x 3mm)
-40°C to +85°C
TEMP RANGE
Ordering Information
DS3908
Pin Configuration
2
C system, provided
14 V
13
12 V1
11
10
9
8
PIN-PACKAGE
14 TDFN
Features
H1
L1
H0
V0
L0
CC
1

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ds3908nt-r Summary of contents

Page 1

... NV ADJUSTABLE V0 REFERENCE VOLTAGE ADJUSTABLE V1 REFERENCE VOLTAGE components from Maxim Integrated Products, Inc., or one of its sublicensed 2 C Patent Rights to use these components ______________________________________________ Maxim Integrated Products Features Ordering Information TEMP RANGE PIN-PACKAGE -40°C to +85°C 14 TDFN Pin Configuration SDA ...

Page 2

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs ABSOLUTE MAXIMUM RATINGS Voltage SDA, and SCL Relative to GND .....-0.5V to +6.0V CC Voltage on A0, A1, A2, L0, L1, H0, H1, and WP Relative to GND................-0.5V to ...

Page 3

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs PROGRAMMABLE-GAIN AMPLIFIER CHARACTERISTICS (V = +3.0V to +5.5V -40°C to +85°C PARAMETER SYMBOL Common-Mode Input Voltage Gain Output Voltage Range Power-Supply Rejection Ratio Output Source Current I OUT:SOURCE ...

Page 4

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs NONVOLATILE MEMORY CHARACTERISTICS (V = +3.0V to +5.5V.) CC PARAMETER SYMBOL EEPROM Write Cycles Note 1: All voltages are referenced to ground. Note 2: I specified assuming control pins are connected as ...

Page 5

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs (T = +25°C, unless otherwise noted.) A NORMALIZED POT END-END RESISTANCE vs. TEMPERATURE 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -40 - ...

Page 6

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs SDA SCL INTERFACE GND Detailed Description The DS3908 contains two nonvolatile digital poten- tiometers with programmable-gain amplifiers buffering ...

Page 7

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs Slave Address and Address Pins 2 The DS3908’ slave address is determined by the state of the A0, A1, and A2 address pins as shown in the ...

Page 8

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs When writing to the DS3908, the potentiometer will adjust to the new setting once it has acknowledged the new data that is being written, and the EEPROM (used to make the setting ...

Page 9

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs Serial Interface Description The following terminology is commonly used to describe data transfers: Master Device: The master device controls the slave devices on the bus. The ...

Page 10

Dual, 64-Position Nonvolatile Digital Potentiometer with Buffered Outputs Byte Read: A byte read is an 8-bit information transfer from the slave to the master plus a 1-bit ACK or NACK from the master to the slave. The 8 bits of ...

Page 11

... ACK ACK START For the latest package outline information www.maxim-ic.com/DallasPackInfo. Printed USA is a registered trademark of Maxim Integrated Products, Inc. = Potentiometer Integral Non-Linearity (LSB (0.6 / 63) x (2.0V - 0.5V) = 0.014V = 2.0V/V x 9mV = 0.018V = PotVoltage x Gain = 0.0929V ...

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