Linear Technology LTC2369-18 with LTC6655-5/LT6202: 18-Bit, 1.6Msps, Pseudo-Differential Unipolar SAR ADC with 96.5dB SNR. Req DC718 or DC DC1813A-E 数据表
产品代码
DC1813A-E
LTC2369-18
1
236918fa
18-Bit, 1.6Msps, Pseudo-
Differential Unipolar SAR
ADC with 96.5dB SNR
TYPICAL APPLICATION
FEATURES
DESCRIPTION
The LTC
®
2369-18 is a low noise, low power, high speed
18-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2369-18 has a 0V
to V
Operating from a 2.5V supply, the LTC2369-18 has a 0V
to V
REF
pseudo-differential unipolar input range with V
REF
ranging from 2.5V to 5.1V. The LTC2369-18 consumes only
18mW and achieves ±2.5LSB INL maximum, no missing
codes at 18 bits with 96.5dB SNR.
18mW and achieves ±2.5LSB INL maximum, no missing
codes at 18 bits with 96.5dB SNR.
The LTC2369-18 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 1.6Msps
throughput with no cycle latency makes the LTC2369-18
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2369-18 automatically
powers down between conversions, leading 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 daisy-chain mode. The fast 1.6Msps
throughput with no cycle latency makes the LTC2369-18
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2369-18 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
32k Point FFT f
S
= 1.6Msps, f
IN
= 2kHz
APPLICATIONS
n
1.6Msps Throughput Rate
n
±2.5LSB INL (Max)
n
Guaranteed 18-Bit No Missing Codes
n
Low Power: 18mW at 1.6Msps, 18μW at 1.6ksps
n
96.5dB SNR (Typ) at f
IN
= 2kHz
n
–120dB THD (Typ) at f
IN
= 2kHz
n
Guaranteed Operation to 125°C
n
2.5V Supply
n
Pseudo-Differential Unipolar Input Range: 0V to 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
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.
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.
5.1Ω
V
REF
0V
10nF
–
+
SAMPLE CLOCK
236918 TA01a
10μF
0.1μF
2.5V
REF
1.8V TO 5V
2.5V TO 5.1V
47μF
(X5R, 0805 SIZE)
(X5R, 0805 SIZE)
REF
GND
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
LTC2369-18
LT
®
6202
V
DD
OV
DD
IN
+
IN
–
FREQUENCY (kHz)
0
100 200 300 400
800
700
600
500
–180
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
236918 TA01b
SNR = 96.5dB
THD = –127dB
SINAD = 96.5dB
SFDR = 134dB
THD = –127dB
SINAD = 96.5dB
SFDR = 134dB