LTC1860/LTC1861

1

18601fa

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

µPower, 12-Bit, 250ksps

1- and 2-Channel ADCs in MSOP

offered in MSOP and SO-8 packages and operate on a single

5V supply. At 250ksps, the supply current is only 850μA.

The supply current drops at lower speeds because the

LTC1860/LTC1861 automatically power down to a typical

supply current of 1nA between conversions. These 12-bit

switched capacitor successive approximation ADCs include

sample-and-holds. The LTC1860 has a differential analog

input with an adjustable reference pin. The LTC1861 offers

a software-selectable 2-channel MUX and an adjustable

reference pin on the MSOP version.

The 3-wire, serial I/O, MSOP or SO-8 package and

extremely high sample rate-to-power ratio make these

ADCs ideal choices for compact, low power, high speed

systems.

These ADCs can be used in ratiometric applications or

with external references. The high impedance analog in-

puts and the ability to operate with reduced spans down

to 1V full scale, allow direct connection to signal sources

in many applications, eliminating the need for external

gain stages.

Single 5V Supply, 250ksps, 12-Bit Sampling ADC

to 2μA at 1ksps

Versions

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

All other trademarks are the property of their respective owners.

Supply Current vs Sampling Frequency

1

2

3

4

8

7

6

5

GND

SCK

SDO

CONV

LTC1860

1860 TA01

ANALOG INPUT

0V TO 5V

5V

1 F

SERIAL DATA LINK TO

ASIC, PLD, MPU, DSP

OR SHIFT REGISTERS

SAMPLING FREQUENCY (kHz)

0.01

1000

100

10

1

0.1

0.01

100

1860 TA02

0.1

1

10

1000