Linear Technology LTC2381CMS-16, 2.5V 16-bit 250Ksps Serial SPI SAR ADC. Req DC718 or DC590 DC1571A-C DC1571A-C Scheda Tecnica
Codici prodotto
DC1571A-C
LTC2381-16
1
238116f
TYPICAL APPLICATION
FEATURES
DESCRIPTION
16-Bit, 250ksps, Low Power
SAR ADC with Serial Interface
The LTC
®
2381-16 is a low noise, low power, high speed
16-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2381-16 has a
±2.5V fully differential input range. The LTC2381-16
consumes only 3.25mW and achieves ±2LSB INL max,
no missing codes at 16-bits and 92dB SNR.
Operating from a 2.5V supply, the LTC2381-16 has a
±2.5V fully differential input range. The LTC2381-16
consumes only 3.25mW and achieves ±2LSB INL max,
no missing codes at 16-bits and 92dB SNR.
The LTC2381-16 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 250ksps
throughput with no cycle latency makes the LTC2381-16
ideally suited for a wide variety of high speed applica-
tions. An internal oscillator sets the conversion time,
easing external timing considerations. The LTC2381-16
automatically powers down between conversions, lead-
ing to reduced power dissipation that scales with the
sampling rate.
interface that supports 1.8V, 2.5V, 3.3V and 5V logic
while also featuring a daisychain mode. The fast 250ksps
throughput with no cycle latency makes the LTC2381-16
ideally suited for a wide variety of high speed applica-
tions. An internal oscillator sets the conversion time,
easing external timing considerations. The LTC2381-16
automatically powers down between conversions, lead-
ing to reduced power dissipation that scales with the
sampling rate.
The LTC2381-16 features a proprietary sampling
architecture that enables the ADC to begin acquiring the
next sample during the current conversion. The resulting
extended acquisition time of 3.25μs allows the use of
extremely low power ADC drivers.
architecture that enables the ADC to begin acquiring the
next sample during the current conversion. The resulting
extended acquisition time of 3.25μs allows the use of
extremely low power ADC drivers.
32k Point FFT f
S
= 250ksps, f
IN
= 20kHz
APPLICATIONS
n
250ksps Throughput Rate
n
±2LSB INL (Max)
n
Guaranteed 16-Bit No Missing Codes
n
Low Power: 3.25mW at 250ksps, 13μW at 1ksps
n
92dB SNR (typ) at f
IN
= 20kHz
n
Extended Acquisition Time of 3.25μs Allows Use of
Lower Power Drivers
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
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
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.
Technology Corporation. All other trademarks are the property of their respective owners.
FREQUENCY (kHz)
0
25
50
75
100
125
–180
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
238116 TA02a
SNR = 91.8dB
THD = –106dB
SINAD = 91.6dB
SFDR = 107dB
THD = –106dB
SINAD = 91.6dB
SFDR = 107dB
LT6350
ANALOG INPUT
0V TO 2.5V
SINGLE-ENDED-
TO-DIFFERENTIAL
DRIVER
50Ω
100Ω
100Ω
50Ω
3300pF
10μF
0.1μF
2.5V
REF
GND
1.8V TO 5V
SAMPLE CLOCK
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
LTC2381-16
IN
+
V
DD
OV
DD
IN
–
2.5V
47μF
(X5R, 0805 SIZE)
(X5R, 0805 SIZE)
238116 TA01