DataSheet39.com

LTC2377-18 Datasheet PDF - Linear

Part Number LTC2377-18
Description Low Power SAR ADC
Manufacturers Linear 
Logo Linear Logo 

Preview ( 24 pages )
		
LTC2377-18 datasheet, circuit
FEATURES
n 500ksps Throughput Rate
n ±1.75LSB INL (Max)
n Guaranteed 18-Bit No Missing Codes
n Low Power: 6.8mW at 500ksps, 6.8μW at 500sps
n 102dB SNR (Typ) at fIN = 2kHz
n 124dB THD (Typ) at fIN = 2kHz
n Digital Gain Compression (DGC)
n Guaranteed Operation to 125°C
n 2.5V Supply
n Fully Differential Input Range ±VREF
n VREF 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
APPLICATIONS
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
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.
LTC2377-18
18-Bit, 500ksps, Low Power
SAR ADC with 102dB SNR
DESCRIPTION
The LTC®2377-18 is a low noise, low power, high speed
18-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2377-18 has a
±VREF fully differential input range with VREF ranging from
2.5V to 5.1V. The LTC2377-18 consumes only 6.8mW and
achieves ±1.75LSB INL maximum, no missing codes at
18 bits with 102dB SNR.
The LTC2377-18 has a high speed SPI-compatible se-
rial interface that supports 1.8V, 2.5V, 3.3V and 5V logic
while also featuring a daisy-chain mode. The fast 500ksps
throughput with no cycle latency makes the LTC2377-18
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2377-18 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
The LTC2377-18 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 • VREF
and full-scale code from VREF to 0.9 • VREF. 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.
TYPICAL APPLICATION
2.5V 1.8V TO 5V
10μF
0.1μF
VREF
0V
VREF
0V
+
20Ω
6800pF
VDD OVDD CHAIN
IN+ RDL/SDI
SDO
3300pF
LTC2377-18
SCK
20Ω
IN
6800pF
REF
BUSY
CNV
GND REF/DGC
2.5V TO 5.1V
237718 TA01
47μF
(X5R, 0805 SIZE)
SAMPLE CLOCK
VREF
32k Point FFT fS = 500ksps, fIN = 2kHz
0
SNR = 102.3dB
–20 THD = –124dB
SINAD = 102.2dB
–40 SFDR = 125dB
–60
–80
–100
–120
–140
–160
–180
0
50 100 150 200 250
FREQUENCY (kHz)
237718 TA02
237718f
1

No Preview Available !


1 page
line_dark_gray
LTC2377-18 equivalent
LTC2377-18
ADC TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN TYP
MAX UNITS
tSCK
tSCKH
tSCKL
tSSDISCK
tHSDISCK
SCK Period
SCK High Time
SCK Low Time
SDI Setup Time From SCK
SDI Hold Time From SCK
(Notes 11, 12)
(Note 11)
(Note 11)
l 10
l4
l4
l4
l1
ns
ns
ns
ns
ns
tSCKCH
tDSDO
tHSDO
SCK Period in Chain Mode
SDO Data Valid Delay from SCK
SDO Data Remains Valid Delay from SCK
tSCKCH = tSSDISCK + tDSDO (Note 11)
CL = 20pF (Note 11)
CL = 20pF (Note 10)
l 13.5
l
l1
ns
9.5 ns
ns
tDSDOBUSYL SDO Data Valid Delay from BUSY
tEN Bus Enable Time After RDL
CL = 20pF (Note 10)
(Note 11)
l
l
5 ns
16 ns
tDIS Bus Relinquish Time After RDL
(Note 11)
l 13 ns
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may effect device
reliability and lifetime.
Note 2: All voltage values are with respect to ground.
Note 3: When these pin voltages are taken below ground or above REF or
OVDD, they will be clamped by internal diodes. This product can handle
input currents up to 100mA below ground or above REF or OVDD without
latch-up.
Note 4: VDD = 2.5V, OVDD = 2.5V, REF = 5V, VCM = 2.5V, fSMPL = 500kHz,
REF/DGC = VREF.
Note 5: Recommended operating conditions.
Note 6: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 7: Bipolar zero-scale error is the offset voltage measured from
–0.5LSB when the output code flickers between 00 0000 0000 0000 0000
and 11 1111 1111 1111 1111. Full-scale bipolar error is the worst-case of
–FS or +FS untrimmed deviation from ideal first and last code transitions
and includes the effect of offset error.
Note 8: All specifications in dB are referred to a full-scale ±5V input with a
5V reference voltage.
Note 9: fSMPL = 500kHz, IREF varies proportionately with sample rate.
Note 10: Guaranteed by design, not subject to test.
Note 11: Parameter tested and guaranteed at OVDD = 1.71V, OVDD = 2.5V
and OVDD = 5.25V.
Note 12: tSCK of 10ns maximum allows a shift clock frequency up to
100MHz for rising capture.
0.8*OVDD
tDELAY
0.8*OVDD
0.2*OVDD
0.2*OVDD
tDELAY
0.8*OVDD
0.2*OVDD
50%
tWIDTH
Figure 1. Voltage Levels for Timing Specifications
50%
237718 F01
237718f
5

5 Page
line_dark_gray


Information Total 24 Pages
Download[ LTC2377-18.PDF Datasheet ]

Share Link :

Electronic Components Distributor

SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Element14 Chip One Stop



Featured Datasheets

Part NumberDescriptionManufacturers
LTC2377-16The function is Low Power SAR ADC.Linear Technology
Linear Technology
LTC2377-18The function is Low Power SAR ADC.Linear
Linear

Quick jump to:

LTC2  1N4  2N2  2SA  2SC  74H  ADC  BC  BF  BU  CXA  HCF  IRF  KA  KIA  LA  LM  MC  NE  ST  STK  TDA  TL  UA 


DataSheet39.com is an Online Datasheet PDF Search Site.
It offers a large amount of data sheet, You can free PDF files download.
The updated every day, always provide the best quality and speed.



keyword : LTC2377-18 schematic, LTC2377-18 equivalent, LTC2377-18 pinout

DataSheet39.com   |  2019   |  Privacy Policy |  Contact Us  | New  |  Search