Linear Technology LTC2378-16 with LTC6655-5/LT6350: 16-Bit, 1Msps, SAR ADC with 97dB SNR. Req DC718 or DC590 DC1783A-B DC1783A-B Ficha De Dados
Códigos do produto
DC1783A-B
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
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-
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
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property of their respective owners.