LTC1197 Linear Technology, LTC1197 Datasheet

LTC1197

Manufacturer Part Number

LTC1197

Description

10-Bit/ 500ksps ADCs in MSOP with Auto Shutdown

Manufacturer

Linear Technology

Datasheet

1.LTC1197.pdf (28 pages)

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Download datasheet (447Kb)

FEATURE

TYPICAL

PPLICATI

8-Pin MSOP and SO Packages

10-Bit Resolution at 500ksps

Single Supply: 5V or 3V

Low Power at Full Speed:

Auto Shutdown Reduces Power Linearly

at Lower Sample Rates

10-Bit Upgrade to 8-Bit LTC1196/LTC1198

SPI and MICROWIRE

Low Cost

High Speed Data Acquisition

Portable or Compact Instrumentation

Low Power or Battery-Operated Instrumentation

0V TO 2.7V RANGE

ANALOG INPUT

25mW Typ at 5V

2.2mW Typ at 2.7V

Single 2.7V Supply, 250ksps, 10-Bit Sampling ADC

PPLICATI

+IN

– IN

GND

LTC1197L

CLK

OUT

REF

Compatible Serial I/O

1 F

1197/99 TA01

2.7V

SERIAL DATA LINK TO

ASIC, PLD, MPU, DSP

OR SHIFT REGISTERS

The LTC

10-bit A/D converters with sampling rates up to 500kHz.

They have 2.7V (L) and 5V versions and are offered in

8-pin MSOP and SO packages. Power dissipation is typi-

cally only 2.2mW at 2.7V (25mW at 5V) during full speed

operation. The automatic power down reduces supply

current linearly as sample rate is reduced. These 10-bit,

switched-capacitor, successive approximation ADCs in-

clude a sample-and-hold. The LTC1197/LTC1197L have a

differential analog input with an adjustable reference pin.

The LTC1199/LTC1199L offer a software-selectable

2-channel MUX.

The 3-wire serial I/O, MSOP and SO-8 packages, 2.7V

operation and extremely high sample rate-to-power ratio

make these ADCs ideal choices for compact, low power

high speed systems.

These circuits can be used in ratiometric applications or

with external references. The high impedance analog

inputs and the ability to operate with reduced spans below

1V full scale (LTC1197/LTC1197L) allow direct connec-

tion to signal sources in many applications, eliminating

the need for gain stages.

MICROWIRE is a trademark of National Semiconductor Corporation.

, LTC and LT are registered trademarks of Linear Technology Corporation.

ESCRIPTIO

MSOP with Auto Shutdown

10000

1000

100

0.1

1197/LTC1197L/LTC1199/LTC1199L are

Supply Current vs Sampling Frequency

0.01

10-Bit, 500ksps ADCs in

0.1

SAMPLING FREQUENCY (kHz)

LTC1197/LTC1197L

LTC1199/LTC1199L

CLK

= 7.2MHz

CLK

= 5V

= 2.7V

= 3.5MHz

100

1197/99 G03

1000

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