LTC2312-14

1

231214fa

For more information www.linear.com/LTC2312-14

TYPICAL APPLICATION

FEATURES

DESCRIPTION

14-Bit, 500ksps Serial

Sampling ADC in TSOT

The LTC®2312-14 is a 14-bit, 500ksps, serial sampling

A/D converter that draws only 3.2mA from a single 3V

or 5V supply. The LTC2312-14 contains an integrated

low drift reference and reference buffer providing a low

cost, high performance (20ppm/°C maximum) and space

saving solution. The LTC2312-14 achieves outstanding

AC performance of 77dB SINAD and –85dB THD while

sampling at 500ksps. The extremely high sample rate-to-

power ratio makes the LTC2312-14 ideal for compact, low

power, high speed systems. The supply current decreases

at lower sampling rates as the device automatically enters

nap mode after conversions.

The LTC2312-14 has a high speed SPI-compatible serial

interface that supports 1.8V, 2.5V, 3V and 5V logic. The

fast 500ksps throughput with no-cycle latency makes

the LTC2312-14 ideally suited for a wide variety of high

speed applications.

Complete 14-/12-Bit Pin-Compatible SAR ADC Family

500ksps

2.5Msps

4.5Msps

5Msps

14-Bit

LTC2312-14 LTC2313-14 LTC2314-14

12-Bit

LTC2312-12 LTC2313-12

LTC2315-12

Power 3V/5V 9mW/15mW 14mW/25mW 18mW/31mW 19mW/32mW

APPLICATIONS

n

500ksps Throughput Rate

n

No Cycle Latency

n

Guaranteed 14-Bit No Missing Codes

n

Single 3V or 5V Supply

n

Low Noise: 77.5dB SNR

n

Low Power: 9mW at 500ksps and 3V Supply

n

Low Drift (20ppm/°C Maximum) 2.048V or 4.096V

Internal Reference

n

Sleep Mode with < 1µA Typical Supply Current

n

Nap Mode with Quick Wake-Up < 1 Conversion

n

Separate 1.8V to 5V Digital I/O Supply

n

High Speed SPI-Compatible Serial I/O

n

Guaranteed Operation from –40°C to 125°C

n

8-Lead TSOT-23 Package

n

Communication Systems

n

High Speed Data Acquisition

n

Handheld Terminal Interface

n

Medical Imaging

n

Uninterrupted Power Supplies

n

Battery Operated Systems

n

Automotive

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.

5V Supply, Internal Reference, 500ksps, 14-Bit Sampling ADC

231214 TA01b

INPUT FREQUENCY (kHz)

0

200

250

100

50

150

0

–20

–40

–60

–80

–100

–120

–140

–160

SNR = 77.5dBFS

SINAD = 77dBFS

THD = –85dB

SFDR = 88dB

SERIAL DATA LINK TO

ASIC, PLD, MPU, DSP

OR SHIFT REGISTERS

ANALOG INPUT

0V TO 4.096V

5V

2.2µF

2.2µF

2.2µF

231214 TA01

GND

REF

SCK

CONV

SDO

LTC2312-14

DIGITAL OUTPUT SUPPLY

1.8V TO 5V