ISL21400IU8Z-TK datasheet(1/17 Pages) RENESAS

部品番号	ISL21400IU8Z-TK

部品情報	Programmable Temperature Slope Voltage Reference

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FN8091 Rev 3.00

Page 1 of 17

March 31, 2011

FN8091

Rev 3.00

March 31, 2011

ISL21400

Programmable Temperature Slope Voltage Reference

DATASHEET

The ISL21400 features a precision voltage reference

combined with a temperature sensor whose output voltage

varies linearly with temperature. The precision 1.20V

reference has a very low temperature coefficient (tempco),

and its output voltage is scaled by an internal DAC (VREF) to

produce a temperature stable output voltage that is

programmable from 0V to 1.20V. The output voltage from the

temperature sensor (VTS) is summed with VREF to produce

a temperature dependent output voltage.

The slope of the VTS portion of the output voltage can be

programmed to be positive or negative in the range

-2.1mV/°C to +2.1mV/°C. A programmable gain amplifier

(PGA) sums the VTS and the VREF voltages and provides

gains of 1x, 2x, and 4x to scale the output up to 4.8V and the

slope to ±8.4mV/°C.

The VREF and VTS terms are programmable with 8 bits of

resolution via an I2C bus and the values are stored in

non-volatile registers. The PGA gain is also set via the I2C

bus and the value is stored in a non-volatile register.

Non-volatile memory storage assures the programmed

settings are retained on power-down, eliminating the need

for software initialization at device power-up.

Temperature Characteristics Curve

Features

• Programmable reference voltage

• Programmable temperature slope

• Programmable Gain Amplifier

• Non-volatile storage of programming registers

•I2C serial interface

• 2% total accuracy over temperature and VCC range

• 200µA typical active supply current

• Operating temperature range = -40°C to +85°C

• 8 Ld MSOP package

• Pb-free (RoHS compliant)

Applications

• RF power amplifier bias compensation

• LCD bias compensation

• Laser diode bias compensation

• Sensor bias and linearization

• Data acquisition systems

• Variable DAC reference

• Amplifier biasing

Pinout

ISL21400

(8 LD MSOP)

TOP VIEW

0.0

0.5

1.0

1.5

2.0

2.5

3.0

-40

-15

10

35

60

85

TEMPERATURE (°C)

TS = 0

TS = 255

TS = 127

TS = 0

TS = 127

TS = 255

AV = 2

AV = 1

Pin Descriptions

MSOP

SYMBOL

DESCRIPTION

1

A2

Hardwire slave address pin for I2C serial bus

2

A1

Hardwire slave address pin for I2C serial bus

3

A0

Hardwire slave address pin for I2C serial bus

4VSS

Ground pin

5

SCL

Serial bus clock input

6

SDA

Serial bus data input/output

7

VOUT

Output voltage

8VCC

Device power supply

A2

VCC

1

2

3

4

SDA

SCL

8

7

6

5

A0

VOUT

VSS

A1

同様の部品番号 - ISL21400IU8Z-TK

メーカー	部品番号	データシート	部品情報
Intersil Corporation	ISL21400IU8Z-TK	424Kb / 17P	Programmable Temperature Slope Voltage Reference

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同様の説明 - ISL21400IU8Z-TK

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