LTC2341-16
Dual, 16-Bit, 666ksps/ch
Differential SoftSpan ADC with
Wide Input Common Mode Range
DESCRIPTION
FEATURES
TheLTC®2341-16isa16-bit, lownoise2-channelsimulta-
neous sampling successive approximation register (SAR)
ADC with differential, wide common mode range inputs.
Operatingfroma5Vsupplyandusingtheinternalreference
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666ksps per Channel Throughput
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Two Simultaneous Sampling Channels
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1.25LSB INL (Maximum)
Guaranteed 16-Bit, No Missing Codes
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and buffer, both channels of this SoftSpanTM ADC can be
independently configured on a conversion-by-conversion
basis to accept 4.096V, 0V to 4.096V, 2.048V, or 0V
to 2.048V signals. One channel may also be disabled to
increase throughput on the other channel.
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Differential, Wide Common Mode Range Inputs
Per-Channel SoftSpan Input Ranges:
4.096V, 0V to 4.096V, 2.048V, 0V to 2.048V
5V, 0V to 5V, 2.5V, 0V to 2.5V
93.4dB Single-Conversion SNR (Typical)
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−114dB THD (Typical) at f = 2kHz
IN
IN
The wide input common mode range and 105dB CMRR of
the LTC2341-16 analog inputs allow the ADC to directly
digitizeavarietyofsignals,simplifyingsignalchaindesign.
This input signal flexibility, combined with 1.25LSB INL,
no missing codes at 16 bits, and 93.4dB SNR, makes the
LTC2341-16 an ideal choice for many applications requir-
ing wide dynamic range.
105dB CMRR (Typical) at f = 200Hz
Rail-to-Rail Input Overdrive Tolerance
Guaranteed Operation to 125°C
Integrated Reference and Buffer (4.096V)
SPI CMOS (1.8V to 5V) and LVDS Serial I/O
Internal Conversion Clock, No Cycle Latency
74mW Power Dissipation (Typical)
TheLTC2341-16supportspin-selectableSPICMOS(1.8V
to 5V) and LVDS serial interfaces. Either one or two lanes
of data output may be employed in CMOS mode, allowing
the user to optimize bus width and throughput.
32-Lead (5mm × 5mm) QFN Package
APPLICATIONS
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, 7961132, 8319673,
9197235.
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Programmable Logic Controllers
Industrial Process Control
Medical Imaging
High Speed Data Acquisition
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TYPICAL APPLICATION
Integral Nonlinearity vs
5V
0.1µF
1.8V TO 5V
0.1µF
2.2µF
V
Output Code and Channel
CMOS OR LVDS
I/O INTERFACE
1.00
0.75
0.50
0.25
0
±±4.096V RANG
FULLY
DIFFERENTIAL
5V
–
+
FULLY DIFFERENTIAL DRIVE (IN = –IN )
ARBITRARY
V
OV
DD
LVDS/CMOS
DD
DDLBYP
ALL CHANNELS
5V
0V
PD
+
–
IN0
IN0
S/H
S/H
LTC2341-16
0V
5V
0V
SDO0
SDO1
SCKO
SCKI
SDI
CS
BUSY
CNV
16-BIT
SAR ADC
MUX
UNIPOLAR
BIPOLAR
–0.25
–0.50
–0.75
–1.00
5V
0V
+
–
IN1
IN1
SAMPLE
CLOCK
REFBUF
47µF
REFIN
GND
+
–
234116 TA01a
DIFFERENTIAL INPUTS IN /IN WITH
WIDE INPUT COMMON MODE RANGE
0.1µF
TWO SIMULTANEOUS
SAMPLING CHANNELS
–32768
–16384
0
16384
32768
OUTPUT CODE
234116 TA01b
234116f
1
For more information www.linear.com/LTC2341-16
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