LTC2383-16 Datasheet, PDF (1/24 Pages) Linear Technology – 16-Bit, 1Msps, Low Power SAR ADC with Serial Interface

LTC2383-16
16-Bit, 1Msps, Low Power
SAR ADC with Serial Interface
FEATURES
n _{1Msps Throughput Rate}
n _{±2LSB INL (Max)}
n _{Guaranteed 16-Bit No Missing Codes}
n _{Low Power: 13mW at 1Msps, 13μW at 1ksps}
n _{92dB SNR (typ) at fIN = 20kHz}
n _{Guaranteed Operation to 125°C}
n _{2.5V Supply}
n _{Fully Differential Input Range ±2.5V}
n _{External 2.5V Reference Input}
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-pin MSOP and 4mm × 3mm DFN Packages}
APPLICATIONS
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
DESCRIPTION
The LTC^®2383-16 is a low noise, low power, high speed
16-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2383-16 has a
±2.5V fully differential input range. The LTC2383-16
consumes only 13mW and achieves ±2LSB INL max, no
missing codes at 16-bits and 92dB SNR.
The LTC2383-16 has a high speed SPI-compatible serial
interface that supports 1.8V, 2.5V, 3.3V and 5V logic
while also featuring a daisychain mode. The fast 1Msps
throughput with no cycle latency makes the LTC2383-16
ideally suited for a wide variety of high speed applica-
tions. An internal oscillator sets the conversion time,
easing external timing considerations. The LTC2383-16
automatically powers down between conversions, lead-
ing to reduced power dissipation that scales with the
sampling rate.
LTC238X-16 SAR ADC Family
PART NUMBER
RESOLUTION
SPEED
POWER
LTC2383-16
16
1Msps
13mW
LTC2382-16
16
500ksps
6.5mW
LTC2381-16
16
250ksps 3.25mW
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
ANALOG INPUT
0V TO 2.5V
50Ω
LT6350
50Ω
SINGLE-ENDED-
TO-DIFFERENTIAL
DRIVER
2.5V 1.8V TO 5V
10μF
0.1μF
100Ω
3300pF
100Ω
V_DD
IN⁺
OV_DD
LTC2383-16
IN^–
REF
GND
2.5V
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
23816 TA01
47μF
(X5R, 0805 SIZE)
SAMPLE CLOCK
32k Point FFT f_S = 1Msps, f_IN = 20kHz
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
SNR = 92.2dB
THD = –106.2dB
SINAD = 92dB
SFDR = 110.4dB
100 200 300 400 500
FREQUENCY (kHz)
238316 TA02
238316f
1