LTC2470/LTC2472

1

24702f

–50

–10

10

–30

50

70

30

90

TEMPERATURE (°C)

1.2520

1.2515

1.2510

1.2505

1.2500

24702 TA01b

1.2480

1.2485

1.2490

1.2495

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Selectable 250sps/1ksps,

16-Bit ΔΣ ADCs with 10ppm/°C

Max Precision Reference

converters with an integrated precision reference and

a selectable 250sps or 1ksps output rate. They use a

single 2.7V to 5.5V supply and communicate through a

SPI Interface. The LTC2470 is single-ended with a 0V to

reference with 2ppm/°C drift performance and 0.1% initial

accuracy. The converters are available in a 12-pin DFN

3mm × 3mm package or an MSOP-12 package. They

include an integrated oscillator and perform conver-

sions with no latency for multiplexed applications. The

LTC2470/LTC2472 include a proprietary input sampling

scheme that reduces the average input current several

orders of magnitude when compared to conventional

delta sigma converters.

Following a single conversion, the LTC2470/LTC2472

automatically power down the converter and can also be

configured to power down the reference. When both the

ADC and reference are powered down, the supply current

is reduced to 200nA.

The LTC2470/LTC2472 include a user selectable 250sps

or 1ksps output rate and due to a large oversampling

ratio (8,192 at 250sps and 2,048 at 1ksps) have relaxed

anti-aliasing requirements.

Applications

Required

Packages

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Protected by U.S. Patents, including 6208279, 6411242, 7088280, 7164378.

10k

10k

10k

R

SCK

SPI

INTERFACE

SDO

CS

0.1μF

0.1μF

2.7V TO 5.5V

10μF

0.1μF

REFOUT

0.1μF

COMP

GND

0.1μF

LTC2472

24702 TA01a