Linear Technology LTC2380-16 with LTC6655-5/LT6350: 16-Bit, 2Msps, SAR ADC with 96dB SNR. Req DC718 or DC590 DC1783A-A DC1783A-A 数据表

LTC2380-16

1

238016fa

16-Bit, 2Msps, Low Power 

SAR ADC with 96.2dB SNR

The LTC

®

2380-16 is a low noise, low power, high speed 

16-bit successive approximation register (SAR) ADC. 
Operating from a 2.5V supply, the LTC2380-16 has a 
±V

REF

 fully differential input range with V

REF

 ranging from 

2.5V to 5.1V. The LTC2380-16 consumes only 19mW and 
achieves ±0.6LSB INL maximum, no missing codes at 
16 bits with 96.2dB SNR.

The LTC2380-16 has a high speed SPI-compatible serial 
interface that supports 1.8V, 2.5V, 3.3V and 5V logic while 
also featuring a daisy-chain mode. The fast 2Msps through-
put with no cycle latency makes the LTC2380-16 ideally 
suited for a wide variety of high speed applications. An 
internal oscillator sets the conversion time, easing external 
timing considerations. The LTC2380-16 automatically pow-
ers down between conversions, leading to reduced power 
dissipation that scales with the sampling rate.

The LTC2380-16 features a unique digital gain compres-
sion (DGC) function, which eliminates the driver amplifier’s 
negative supply while preserving the full resolution of the 
ADC. When enabled, the ADC performs a digital scaling 
function that maps zero-scale code from 0V to 0.1 • V

REF

 

and full-scale code from V

REF

 to 0.9 • V

REF

. For a typical 

reference voltage of 5V, the full-scale input range is now 
0.5V to 4.5V, which provides adequate headroom for 
powering the driving amplifier from a single 5.5V supply.

n

  2Msps Throughput Rate

n

  ±0.6LSB INL (Max)

n

  Guaranteed 16-Bit No Missing Codes

n

  Low Power: 19mW at 2Msps, 19μW at 2ksps

n

  96.2dB SNR (typ) at f

n

  –117dB THD (typ) at f

n

  Digital Gain Compression (DGC)

n

  Guaranteed Operation to 125°C

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 2.5V Supply

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  Fully Differential Input Range ±V

REF

n

  V

REF

 Input Range from 2.5V to 5.1V

n

  No Pipeline Delay, No Cycle Latency

n

  1.8V to 5V I/O Voltages

n

  SPI-Compatible Serial I/O with Daisy-Chain Mode

n

  Internal Conversion Clock

n

  16-Lead MSOP and 4mm 

× 3mm DFN Packages

n

 Medical Imaging

n

  High Speed Data Acquisition

n

  Portable or Compact Instrumentation

n

  Industrial Process Control

n

  Low Power Battery-Operated Instrumentation

n

 ATE

FREQUENCY (kHz)

0 100 200 300 400

1000

900

800

700

600

500

–180

AMPLITUDE (dBFS)

–60

–40

–20

–80

–100

–120

–140

–160

0

238016 TA02

SNR = 96.4dB
THD = –119dB
SINAD = 96.3dB
SFDR = 122dB

V

REF

20Ω

V

REF

0V

V

REF

0V

20Ω

3300pF

3300pF

3300pF

SAMPLE CLOCK

238016 TA01

10μF

0.1μF

2.5V

REF

1.8V TO 5V

2.5V TO 5.1V

47μF
(X5R, 0805 SIZE)

REF

GND

CHAIN

RDL/SDI

SDO

SCK

BUSY

CNV

REF/DGC

LTC2380-16

V

DD

OV

DD

IN

+

IN

–

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and 
SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property 
of their respective owners. Protected by U.S. Patents including 7705765.