x60250 Intersil Corporation, x60250 Datasheet

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x60250

Manufacturer Part Number
x60250
Description
Micro Power Programmable Voltage Reference
Manufacturer
Intersil Corporation
Datasheet
Micro Power Programmable Voltage
Reference
FEATURES
• 1.25V 1.0%, 20ppm/°C Tempco Reference
• Adjustable to ±0.25% Over the 0 to 1.25V Range
• 8 bit, 100kΩ XDCP on-chip
• Programmable Resolution of 4.9mV (255 steps)
• Extra Matched 100kΩ Resistor Available for
• 2.7V to 5.5V Supply Range
• 2-Wire Interface for Programming Reference
• Low Supply Current: 12µA in Normal Mode
• 8-pin TSSOP Package
• Programmable Reference
• NV Memory
• Pb-Free Plus Anneal Available (RoHS Compliant)
IC BLOCK DIAGRAM
Increased Resolution Over a Smaller Range
Setting
®
1
SCL
SDA
Data Sheet
V
CC
Reference
1-888-INTERSIL or 1-888-468-3774
Interface
1.25V
Serial
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
GND
V
REFOUT
Pwr On Recall
Digital Wiper
PROGRAMMABLE VOLTAGE
REFERENCE APPLICATIONS
• Sensor Bias
• Variable DAC reference
• Linear Voltage Regulators
• DC/DC converters
• Voltage comparators
• Motor controllers
• Amplifier biasing
DESCRIPTION
The
compensated voltage reference with a Intersil Digitally
Controlled Potentiometer (XDCP) to provide a precision
adjustable reference with a range of 0.0V to 1.25V. The
device includes a serial bus interface to enable in-circuit
programming of the reference voltage.
The XDCP contains a resistor chain with 255 taps to
provide 8 bits of digital adjustment to the reference
voltage. Non-volatile storage retains the digital wiper
setting, for permanent reference programming. An
additional matched 100kΩ resistor is available to
increase resolution of the output voltage while retaining
accuracy.
PROM
September 14, 2005
Control
EE
Intersil
All other trademarks mentioned are the property of their respective owners.
V
|
REFL
Intersil (and design) is a registered trademark of Intersil Americas Inc.
100K
X60250
Copyright Intersil Americas Inc. 2005. All Rights Reserved
100kΩ
combines
V
R
OUT
1
a
X60250
FN8146.1
temperature

Related parts for x60250

x60250 Summary of contents

Page 1

... CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X60250 FN8146.1 combines a temperature V ...

Page 2

... PART MARKING X60250V8I 60250 I X60250V8IZ (Note) 60250I Z NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020 ...

Page 3

... Short Circuit Current SC Sourcing Sinking C Load Capacitance L 3 X60250 COMMENTS Absolute Maximum Ratings indicate limits beyond which permanent damage to the device and impaired reliability may occur. These are stress ratings provided for information only and functional operation of the CC +0.3V device at these or any other conditions beyond those ...

Page 4

... OL V Output High Voltage OH C Output Load L EEPROM PARAMETERS (Erase at V Parameter Write Cycle Endurance CAPACITANCE Symbol C Input/Output capacitance (SDA) IN/OUT C Input capacitance (SCL X60250 Limits (1) Min. Typ. Max. AC Parameters 100 200 250 100 115 5000 600 1200 ±0.2 ± ...

Page 5

... SDA and SCL Fall Time F Cb Capacitive load for each bus line TIMING DIAGRAMS Bus Timing t t BUF F SCL t t SU:DAT SU:STA t HD:STA SDA IN SDA OUT 5 X60250 10ns V x 0.5 CC 2.3kΩ and 100 Parameter (2) (2) (2) (2) (2, 3) ( ...

Page 6

... It is the minimum cycle time to be allowed for any nonvolatile write by the user, unless Acknowledge Polling is used. (5) Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change divided by the temperature range; in this case, -40°C to +85°C = 125°C. TCOref = [Max V(V OUT / (1.25V × 125° X60250 ACK Parameter (2) (2) (2) Parameter Min. ( ...

Page 7

... X60250 wiper currents and thus only a small output voltage error. If the X60250 is used with the wiper connected produce a current source, care must be taken to avoid exceeding the maximum output current of the reference (typically 400µA). ...

Page 8

... X60250 REGISTER BIT MAP Addr (MSB (MSB REGISTER DESCRIPTIONS Reg Nonvolatile Description wiper setting OUT 1 Y General Purpose data storage register 7 N Status register REGISTER 0 (NONVOLATILE) This register is used to hold the DCP wiper position, which is given by: Code × ...

Page 9

... X60250 BUS INTERFACE INFORMATION Figure 1. Slave Address, Word Address, and Data Bytes - Write Mode Device Identifier Figure 2. Slave Address, Word Address, and Data Bytes - Read Mode Device Identifier X60250 Slave Address ...

Page 10

... X60250 BUS INTERFACE INFORMATION Slave Address, Address Byte, and Data Byte The byte communication format for the serial bus is shown in Figure 1 on the previous page. The first byte, BYTE 0, defines the device identifier, 0101 in the upper half; and the device slave address in the low half of the byte ...

Page 11

... Figure 4. Acknowledge Response From Receiver SCL from Master Data Output from Transmitter Data Output from Receiver Start Figure 5. Valid Data Changes on the SDA Bus SCL SDA 11 X60250 Figure 3. Valid Start and Stop Conditions SCL SDA 1 Data Stable Data Change Data Stable Start Stop 8 9 ...

Page 12

... Master SDA Bus Signals From The Slave *Note: The X60250 will respond to either 000 or 001 slave addresses. Byte Write For a write operation, the device requires the Slave Address Byte and the Word Address Bytes. This gives the master access to any one of the words in the array. ...

Page 13

... Vcc (V) Vref Output Voltage Noise, 0.1Hz to 10Hz INL 0.50 0.40 0.30 0.20 0.10 0.00 -0.10 -0.20 -0.30 -0.40 -0. 100 Tap Position 13 X60250 1.2550 1.2540 Refout 1.2530 1.2520 +25 deg C 1.2510 1.2500 -40 deg C 1.2490 1.2480 1.2470 1.2460 1.2450 0. 100 50.00E-6 Refout (-40C) 45.00E-6 Refout (25C) Refout (85C) 40 ...

Page 14

... REFOUT V OUT 1.25V 100K Reference R 1 100K V GND REFL 14 X60250 Power On Settling Time Figure 9. Using Auxilliary Resistor V REFOUT 1.25V Reference grounded. 1 GND Reducing Output Noise The output noise voltage of the reference is typically 200µV rms in the 10kHz bandwidth. An advantage of the Adjusted ...

Page 15

... Reference R 1 100K V GND REFL 15 X60250 Higher Reference Voltages This should If a reference voltage higher than 1.25V is required, then an opamp can be added to amplify the V There are many micropower opamps available, such the LMV341, which can produce an output at very close ...

Page 16

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 16 X60250 8-Lead Plastic, TSSOP, Package Code V8 .025 (.65) BSC .169 (4.3) ...

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