LTC2382-16
16-Bit, 500ksps, Low Power
SAR ADC with Serial Interface
FEATURES
nn 500ksps Throughput Rate
nn ±2LSB INL (Max)
nn Guaranteed 16-Bit No Missing Codes
nn Low Power: 6.5mW at 500ksps, 13µW at 1ksps
nn 92dB SNR (Typ) at fIN = 20kHz
nn Extended Acquisition Time of 1.25µs Allows Use of
Lower Power Drivers
nn Guaranteed Operation to 125°C
nn 2.5V Supply
nn Fully Differential Input Range ±2.5V
nn External 2.5V Reference Input
nn No Pipeline Delay, No Cycle Latency
nn 1.8V to 5V I/O Voltages
nn SPI-Compatible Serial I/O with Daisy-Chain Mode
nn Internal Conversion Clock
nn 16-Pin MSOP and 4mm × 3mm DFN Packages
APPLICATIONS
nn Medical Imaging
nn High Speed Data Acquisition
nn Portable or Compact Instrumentation
nn Industrial Process Control
nn Low Power Battery-Operated Instrumentation
nn ATE
DESCRIPTION
The LTC®2382-16 is a low noise, low power, high speed
16-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2382-16 has a
±2.5V fully differential input range. The LTC2382-16
consumes only 6.5mW and achieves ±2LSB INL max, no
missing codes at 16-bits and 92dB SNR.
The LTC2382-16 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 500ksps
throughput with no cycle latency makes the LTC2382-16
ideally suited for a wide variety of high speed applicat ions.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2382-16 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
The LTC2382-16 features a proprietary sampling archi-
tecture that enables the ADC to begin acquiring the next
sample during the current conversion. The resulting
extended acquisition time of 1.25µs allows the use of
extremely low power ADC drivers.
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.
TYPICAL APPLICATION
2.5V 1.8V TO 5V
ANALOG INPUT
0V TO 2.5V
50Ω
LT6350
50Ω
SINGLE-ENDED-
TO-DIFFERENTIAL
DRIVER
10µF
0.1µF
100Ω
3300pF
100Ω
IN+
VDD
OVDD
LTC2382-16
IN–
REF
GND
2.5V
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
238216 TA01
47µF
(X5R, 0805 SIZE)
SAMPLE CLOCK
For more information www.linear.com/LTC2382-16
32k Point FFT fS = 500ksps, fIN = 20kHz
0
SNR = 92.2dB
–20
THD = –106dB
SINAD = 92dB
–40
SFDR = 107dB
–60
–80
–100
–120
–140
–160
–180
0
50 100 150 200 250
FREQUENCY (kHz)
238216 TA02a
238216fa
1
