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  4. LTC2378-16 with LTC6655-5/LT6350: 16-Bit, 1Msps, SAR ADC with 97dB SNR. Req DC718 or DC590 DC1783A-B
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Linear Technology LTC2378-16 with LTC6655-5/LT6350: 16-Bit, 1Msps, SAR ADC with 97dB SNR. Req DC718 or DC590 DC1783A-B DC1783A-B Scheda Tecnica

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LTC2378-16
1
237816f
Typical applicaTion
FeaTures
DescripTion
16-Bit, 1Msps, Low Power 
SAR ADC with 97dB SNR
The LTC
®
2378-16 is a low noise, low power, high speed 
16-bit successive approximation register (SAR) ADC. Op-
erating from a 2.5V supply, the LTC2378-16 has a ±V
REF
 
fully differential input range with V
REF
 ranging from 2.5V 
to 5.1V. The LTC2378-16 consumes only 13.5mW and 
achieves ±0.5LSB INL maximum, no missing codes at 
16 bits with 97dB SNR.
The LTC2378-16 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 1Msps through-
put with no cycle latency makes the LTC2378-16 ideally 
suited for a wide variety of high speed applications. An 
internal oscillator sets the conversion time, easing external 
timing considerations. The LTC2378-16 automatically pow-
ers down between conversions, leading to reduced power 
dissipation that scales with the sampling rate.
The LTC2378-16 features a unique digital gain compres-
sion (DGC) function, which eliminates the driver amplifier’s 
negative supply while preserving the full resolution of the 
ADC. When enabled, the ADC performs a digital scaling 
function that maps zero-scale code from 0V to 0.1 • V
REF
 
and full-scale code from V
REF
 to 0.9 • V
REF
. For a typical 
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.
32k Point FFT f
S
 = 1Msps, f
IN
 = 2kHz
applicaTions
n
  1Msps Throughput Rate
n
  ±0.5LSB INL (Max)
n
  Guaranteed 16-Bit No Missing Codes
n
  Low Power: 13.5mW at 1Msps, 13.5µW at 1ksps
n
  97dB SNR (Typ) at f
IN
 = 2kHz
n
 –122dB THD (Typ) at f
IN
 = 2kHz
n
  Digital Gain Compression (DGC)
n
  Guaranteed Operation to 125°C
n
  2.5V Supply
n
  Fully Differential Input Range ±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
FREQUENCY (kHz)
0
100
200
300
500
400
–180
AMPLITUDE (dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237816 TA02
SNR = 97.2dB
THD = –121.7dB
SINAD = 97.1dB
SFDR = 128dB
20Ω
V
REF
0V
V
REF
0V
20Ω
3300pF
6800pF
6800pF
–
+
V
REF
SAMPLE CLOCK
237816 TA01
10µF
0.1µF
2.5V
REF
1.8V TO 5V
2.5V TO 5.1V
47µF
(X5R, 0805 SIZE)
REF
GND
CHAIN
RDL/SDI
SDO
SCK
BUSY
CNV
REF/DGC
LTC2378-16
V
DD
OV
DD
IN
+
IN
–
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.