1

LTC1864L/LTC1865L

sn18645L 18645Lfs

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

µPower, 3V, 16-Bit, 150ksps

1- and 2-Channel ADCs in MSOP

Single 3V Supply, 150ksps, 16-Bit Sampling ADC

Supply Current vs Sampling Frequency

The LTC

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

single 3V supply. At 150ksps, the supply current is only

450µA. The supply current drops at lower speeds because

the LTC1864L/LTC1865L automatically power down

between conversions. These 16-bit switched capacitor

successive approximation ADCs include sample-and-holds.

The LTC1864L has a differential analog input with an

external reference pin. The LTC1865L offers a software-

selectable 2-channel MUX and an external reference pin on

the MSOP version.

The 3-wire, serial I/O, small 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

inputs 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.

to 10µA at 1ksps

Versions

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

■

Low Power Battery-Operated Instrumentation

1

2

3

4

8

7

6

5

GND

SCK

SDO

CONV

LTC1864L

1864 TA01

ANALOG INPUT

0V TO 3V

3V

1µF

SERIAL DATA LINK TO

ASIC, PLD, MPU, DSP

OR SHIFT REGISTERS

MICROWIRE is a trademark of National Semiconductor Corporation.

SAMPLING FREQUENCY (kHz)

0.1

1

10

100

1000

0.01

1

10

1000

1864L/65L TA02

0.1

100

CONV LOW = 2µs