Electrical Specifications Subject to Change
LTC2380-16
16-Bit, 2Msps, Low Power
SAR ADC with 96dB SNR
FEATURES
DESCRIPTION
The LTC®2380-16 is a low noise, low power, high speed
16-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2380-16 has a
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2Msps Throughput Rate
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±±0.6Sꢀ IN6 ꢁMaꢂx
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Guaranteed 1.-ꢀit No Missing Codes
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6ow Power: 19mW at 2Msps, 19μW at 2ksps
V
REF
fully differential input range with V ranging from
REF
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9.dꢀ SNR ꢁtypx at f = 2kHz
2.5V to 5.1V. The LTC2380-16 consumes only 19mW and
achieves 0.6LSꢀ ꢁIL maximum, no missing codes at
16-bits with 96dꢀ SIR.
IN
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–117dꢀ THD ꢁtypx at f = 2kHz
IN
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Digital Gain Compression ꢁDGCx
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Guaranteed Operation to 125°C
The LTC2380-16 has a high speed SPꢁ-compatible serial
interface that supports 1.8V, 2.5V, 3.3V and 5V logic while
alsofeaturingadaisychainmode.Thefast2Mspsthrough-
put with no cycle latency makes the LTC2380-16 ideally
suited for a wide variety of high speed applications. An
internaloscillatorsetstheconversiontime,easingexternal
timingconsiderations.TheLTC2380-16automaticallypow-
ers down between conversions, leading to reduced power
dissipation that scales with the sampling rate.
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2.5V Supply
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Fully Differential ꢁnput Range V
REF
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n
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V
ꢁnput Range from 2.5V to 5.1V
REF
Io Pipeline Delay, Io Cycle Latency
1.8V to 5V ꢁ/O Voltages
SPꢁ-Compatible Serial ꢁ/O with Daisy-Chain Mode
ꢁnternal Conversion Clock
16-pin MSOP and 4mm × 3mm DFI Packages
The LTC2380-16 features a unique digital gain compres-
sion(DGC)function,whicheliminatesthedriveramplifier’s
negative supply while preserving the full resolution of the
ADC. When enabled, the ADC performs a digital scaling
APPLICATIONS
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Medical ꢁmaging
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High Speed Data Acquisition
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Portable or Compact ꢁnstrumentation
ꢁndustrial Process Control
function that maps zero-scale code from 0V to 0.1 • V
REF
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and full-scale code from V
to 0.9 • V . For a typical
REF
REF
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Low Power ꢀattery-Operated ꢁnstrumentation
reference voltage of 5V, the full-scale input range is now
0.5V to 4.5V, which provides adequate headroom for
powering the driving amplifier from a single 5.5V supply.
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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.
TYPICAL APPLICATION
32k Point FFT fS = 2Msps, fIN = 2kHz
0
2.5V 1.8V TO 5V
10μF
SIR = 96.4dꢀ
–20
–40
THD = –119dꢀ
SꢁIAD = 96.3dꢀ
SFDR = 122dꢀ
0.1μF
–60
V
OV
DD
CHAꢁI
RDL/SDꢁ
SDO
SCK
ꢀUSY
CIV
DD
3300pF
3300pF
3300pF
V
V
REF
20Ω
20Ω
+
–
–80
ꢁI
0V
–100
–120
–140
–160
–180
LTC2380-16
REF
ꢁI
SAMPLE CLOCK
0V
V
REF/DGC
REF
REF
GID
REF
238016 TA01
2.5V TO 5.1V
47μF
(X5R, 0805 SꢁZE)
0
100 200 300 400 500 600 700 800 900 1000
FREQUEICY (kHz)
238016 TA02
238016p
1