LTC2326-16
16-Bit, 250ksps, 10ꢀ2ꢁ4
True Bipolar, Pseudo-Differential
Input ADC with 93ꢀ5dB SNR
FeaTures
DescripTion
The LTC®2326-16 is a low noise, high speed 16-bit suc-
cessive approximation register (SAR) ADC with pseudo-
differential inputs. Operating from a single 5V supply, the
LTC2326-16hasa 1ꢀ.2ꢁVtruebipolarinputrange,making
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250ksps Throughput Rate
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±±15LSB INL (Max)
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Guaranteed ±6-Bit No Missing Codes
Pseudo-Differential Inputs
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True Bipolar Input Ranges ±6125V, ±±012ꢀV, ±±215V
it ideal for high voltage applications which require a wide
dynamic range. The LTC2326-16 achieves 1.5LSB INL
maximum, no missing codes at 16 bits with 93.5dB SNR.
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9315dB SNR (Typ) at f = 2kHz
IN
IN
–±±±dB THD (Typ) at f = 2kHz
Guaranteed Operation to 125°C
The LTC2326-16 has an onboard single-shot capable
reference buffer and low drift (2ꢀppm/°C max) 2.ꢀꢁ8V
temperature compensated reference. The LTC2326-16
also has a high speed SPI-compatible serial interface that
supports1.8V,2.5V,3.3Vand5Vlogicwhilealsofeaturing
a daisy-chain mode. The fast 25ꢀksps throughput with
no cycle latency makes the LTC2326-16 ideally suited
for a wide variety of high speed applications. An internal
oscillator sets the conversion time, easing external timing
considerations. The LTC2326-16 dissipates only 28mW
and automatically naps between conversions, leading to
reduced power dissipation that scales with the sampling
rate. A sleep mode is also provided to reduce the power
consumption of the LTC2326-16 to 3ꢀꢀμW for further
power savings during inactive periods.
Single 5V Supply
Low Drift (2ꢀppm/°C Max) 2.ꢀꢁ8V Internal Reference
Onboard Single-Shot Capable Reference Buffer
No Pipeline Delay, No Cycle Latency
1.8V to 5V I/O Voltages
SPI-Compatible Serial I/O with Daisy-Chain Mode
Internal Conversion Clock
Power Dissipation 28mW (Typ)
16-Lead MSOP Package
applicaTions
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Programmable Logic Controllers
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Industrial Process Control
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High Speed Data Acquisition
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Portable or Compact Instrumentation
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 77ꢀ5765, 7961132.
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ATE
Typical applicaTion
32k Point FFT fS = 250ksps,
fIN = 2kHz
0
5V
1.8V TO 5V
SNR = 93.5dB
–20
–40
THD = –113dB
SINAD = 93.4dB
SFDR = –117dB
10µF
2.2µF
0.1µF
+10.24V
–60
+
V
V
OV
DD
DDLBYP DD
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
–10.24V
+
–
–80
LT®1468
IN
–100
–120
–140
–160
–180
LTC2326-16
–
IN
SAMPLE CLOCK
REF
REFBUF
REFIN
GND
232616 TA01a
100nF
47µF
0
25
50
75
100
125
FREQUENCY (kHz)
232616 TA01b
232616fa
1
For more information www.linear.com/LTC2326-16