LTC2391-16
1
239116fa
TYPICAL APPLICATION
DESCRIPTION
16-Bit, 250ksps SAR ADC
with 94dB SNR
The LTC
®
2391-16 is a low noise, high speed 16-bit suc-
cessive approximation register (SAR) ADC. Operating
from a single 5V supply, the LTC2391-16 supports a large
±4.096V fully differential input range, making it ideal for
high performance applications which require maximum
dynamic range. The LTC2391-16 achieves ±2LSB INL
max, no missing codes at 16-bits and 94dB SNR (typ).
The LTC2391-16 includes a precision internal reference
with a guaranteed 0.5% initial accuracy and a ±20ppm/°C
(max) temperature coeffi cient. Fast 250ksps throughput
with no cycle latency in both parallel and serial interface
modes makes the LTC2391-16 ideally suited for a wide
variety of high speed applications. An internal oscillator
sets the conversion time, easing external timing con-
siderations. The LTC2391-16 dissipates only 95mW at
250ksps, while both nap and sleep power-down modes are
provided to further reduce power during inactive periods.
FEATURES
APPLICATIONS
n
250ksps Throughput Rate
n
±2LSB INL (Max)
n
Guaranteed 16-Bit No Missing Codes
n
94dB SNR (Typ) at f
IN
= 20kHz
n
Guaranteed Operation to 125°C
n
Single 5V Supply
n
1.8V to 5V I/O Voltages
n
95mW Power Dissipation
n
±4.096V Differential Input Range
n
Internal Reference (20ppm/°C Max)
n
No Pipeline Delay, No Cycle Latency
n
Parallel and Serial Interface
n
Internal Conversion Clock
n
48-Lead 7mm × 7mm LQFP and QFN Packages
n
Medical Imaging
n
High Speed Data Acquisition
n
Digital Signal Processing
n
Industrial Process Control
n
Instrumentation
n
ATE
16k Point FFT f
S
= 250ksps,
f
IN
= 20kHz
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.
5V
0.1μF10μF
5V
0.1μF10μF
SER/PAR
BYTESWAP
OB/2C
CS
RD
BUSY
PARALLEL
OR
SERIAL
INTERFACE
OGND
239116 TA01
IN
–
IN
+
2200pF
249Ω
249Ω
ANALOG INPUT
0V TO 4.096V
SINGLE-ENDED-
TO-DIFFERENTIAL
DRIVER
GNDRESETCNVST PD
SAMPLE CLOCK
REFOUTREFIN
AVP DVP
LTC2391-16
OVP
1.8V TO 5V
16 BIT
VCM
1μF10μF
4.7μF
LT6350
FREQUENCY (kHz)
0
–180
AMPLITUDE (dBFS)
–160
–120
–100
–80
50
100
125
0
239116 G08
–140
25 75
–60
–40
–20
SNR = 94dB
THD –103dB
SINAD = 93.5dB
SFDR = 104dB