DS4305 Maxim Integrated Products, Inc., DS4305 Datasheet

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DS4305

Manufacturer Part Number
DS4305
Description
Ds4305, Ds4305k Electronically Programmable Voltage Reference
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The DS4305 is a nonvolatile (NV) electronically pro-
grammable voltage reference. The reference voltage is
programmed in-circuit during factory calibration/
programming. Programming the reference voltage,
V
V
voltage level indefinitely, even if the device is power
cycled. The DS4305 replaces current cumbersome fac-
tory adjustment arrangements with a low-cost solution
that can be adjusted using automated techniques. In
addition, the DS4305 has the ability to be readjusted
after the unit has been fully assembled and tested. This
results in a much more flexible manufacturing arrange-
ment, lower inventory costs, and a quicker time-to-market.
Rev 1; 8/06
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.
OUT
IN
REFERENCE
VOLTAGE
SHUNT
and toggling the adjust pin (ADJ) to lock the V
, is as simple as applying the desired voltage on
Power-Supply Calibration
Threshold Setting
Offset Nulling
Bias Adjusting
Power Amps
Pressure Bridges
Factory-Calibrated Equipment
EXISTING SOLUTION
Typical Operating Circuit
HAND-SELECTED
0.1% RESISTOR
OR MECHANICAL POT
REFERENCE
VOLTAGE
General Description
V
CC
GND
V
CC
DS4305 SOLUTION
Applications
V
ACCESS FOR
AUTOMATED
ALIGNMENT
______________________________________________ Maxim Integrated Products
DS4305
IN
ADJ
V
OUT
Electronically Programmable
REFERENCE
VOLTAGE
OUT
o Precise Electronically Adjustable Voltage
o Enables Automated Factory Trimming of Devices
o Can be Adjusted to Within ±1.5mV
o Wide Adjustable Output Voltage Range Within
o Low Temperature Coefficient
o ±1mA of Output-Current Drive
o NV Memory Stores the Voltage Indefinitely
o Output Short-Circuit Protection
o Low Cost
o Low Power Consumption
o 4.0V to 5.5V Single-Supply Operation
o Small 5-Lead SOT23 Package
o -40°C to +125°C Temperature Operation
o DS4305K Evaluation Kit is Available
+Denotes lead-free package.
DS4305R+T&R
Reference
Needing Voltage Adjustment
300mV of the Supply Rails
TOP VIEW
PART
Voltage Reference
GND
ADJ
V
-40°C to +125°C
IN
TEMP RANGE
1
2
3
Ordering Information
SOT23
DS4305
Pin Configuration
5
4
PIN-
PACKAGE
5 SOT23
V
V
CC
OUT
Features
MARK
4305+
SOT
1

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DS4305 Summary of contents

Page 1

... The DS4305 replaces current cumbersome fac- tory adjustment arrangements with a low-cost solution that can be adjusted using automated techniques. In addition, the DS4305 has the ability to be readjusted after the unit has been fully assembled and tested. This results in a much more flexible manufacturing arrange- ment, lower inventory costs, and a quicker time-to-market ...

Page 2

Electronically Programmable Voltage Reference ABSOLUTE MAXIMUM RATINGS Voltage on V Relative to GND ...........................-0.5V to +6. ADJ, and V Voltage OUT Relative to GND ...-0. 0.5V), not to exceed +6.0V CC Operating ...

Page 3

... OUT ST Note 5: EEPROM programming time is the hold time required after the DS4305 has completed self-adjustment before V can be removed or before ADJ can be toggled low once again. Note 6: Turn-on time is defined as the time required for V applied. Note 7: V not loaded. ...

Page 4

... T = +125°C A -300 T = -40°C A -400 T = +85°C A -500 -600 4.0 4.3 4.6 4.9 5.2 SUPPLY VOLTAGE (V) DS4305 OUTPUT NOISE (0.1Hz TO 10Hz) 300 200 100 0 -100 -200 OUT -300 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 TIME (s) DS4305 LOAD TRANSIENT (V = 3.0V 5.0V) OUT CC DS4305 toc12 +1mA I OUT -1mA V OUT AC-COUPLED 300mV/div 5.5 4.0 ...

Page 5

... T = +25°C, unless otherwise noted DS4305 LINE TRANSIENT (V = 3.0V) OUT 5. 4.0V V OUT AC-COUPLED 300mV/div DS4305 V ADJUST TRANSIENT OUT (V = 0.3V TO 4.0V 2V/div ADJ 1V/div V OUT Electronically Programmable Typical Operating Characteristics (continued) DS4305 toc13 1.1V/div = 5.0V) CC DS4305 toc15 1.010 1.008 1.006 1.004 1.002 1.00 0.998 ...

Page 6

... The DS4305 output voltage can be adjusted over almost the entire operating supply range of the device, and it can be precisely set to with- in ±1.5mV. A graphical description of the DS4305 is provided in the block diagram. During factory calibration, a simple adjustment proce- dure must be followed. This entire procedure includes ...

Page 7

... The DS4305 replaces this cum- bersome arrangement with a solution that is capable of being adjusted by automated techniques. An additional benefit of the DS4305 is the ability to provide a much lower voltage (down to 300mV) than is possible with pin, (2) control the IN shunt voltage references ...

Page 8

... Dallas Semiconductor Corporation. Heaney TRANSISTOR COUNT: 6016 SUBSTRATE CONNECTED TO GROUND Package Information For the latest package outline information www.maxim-ic.com/DallasPackInfo. CC Pages changed at Rev1: 1 Title changes—all pages is a registered trademark of Maxim Integrated Products, Inc. Chip Topology Revision History ...

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