LTC2368-18 ADC Datasheet

LTC2368-18 Datasheet PDF, Equivalent


Part Number

LTC2368-18

Description

Pseudo Differential Unipolar SAR ADC

Manufacture

Linear

Total Page 24 Pages
Datasheet
Download LTC2368-18 Datasheet


LTC2368-18
FEATURES
n 1Msps Throughput Rate
n ±2.5LSB INL (Max)
n Guaranteed 18-Bit No Missing Codes
n Low Power: 13.5mW at 1Msps, 13.5µW at 1ksps
n 97dB SNR (Typ) at fIN = 2kHz
n120dB THD (Typ) at fIN = 2kHz
n Guaranteed Operation to 125°C
n 2.5V Supply
n Pseudo-Differential Unipolar Input Range: 0V to 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
LTC2368-18
18-Bit, 1Msps, Pseudo-
Differential Unipolar SAR
ADC with 97dB SNR
DESCRIPTION
The LTC®2368-18 is a low noise, low power, high speed
18-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2368-18 has a 0V
to VREF pseudo-differential unipolar input range with VREF
ranging from 2.5V to 5.1V. The LTC2368-18 consumes
only 13.5mW and achieves ±2.5LSB INL maximum, no
missing codes at 18 bits with 97dB SNR.
The LTC2368-18 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 LTC2368-18 ideally
suited for a wide variety of high speed applications. An
internal oscillator sets the conversion time, easing external
timing considerations. The LTC2368-18 automatically pow-
ers down between conversions, leading to reduced power
dissipation that scales with the sampling rate.
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 7705765.
TYPICAL APPLICATION
2.5V 1.8V TO 5V
VREF
0V
+
LT®6202
10µF
0.1µF
10Ω
IN+
VDD
OVDD
CHAIN
RDL/SDI
10nF
LTC2368-18
SDO
SCK
INBUSY
REF GND CNV
2.5V TO 5.1V
236818 TA01a
47µF
(X5R, 0805 SIZE)
SAMPLE CLOCK
32k Point FFT fS = 1Msps, fIN = 2kHz
0 SNR = 97.2dB
–20 THD = –120dB
SINAD = 97.1dB
–40 SFDR = 120dB
–60
–80
–100
–120
–140
–160
–180
0
100 200 300 400 500
FREQUENCY (kHz)
236818 TA01b
236818f
1

LTC2368-18
LTC2368-18
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
Supply Voltage (VDD)................................................2.8V
Supply Voltage (OVDD).................................................6V
Reference Input (REF)..................................................6V
Analog Input Voltage (Note 3)
IN+, IN..........................(GND – 0.3V) to (REF + 0.3V)
Digital Input Voltage
(Note 3)........................... (GND – 0.3V) to (OVDD + 0.3V)
Digital Output Voltage
(Note 3)........................... (GND – 0.3V) to (OVDD + 0.3V)
Power Dissipation............................................... 500mW
Operating Temperature Range
LTC2368C................................................. 0°C to 70°C
LTC2368I..............................................–40°C to 85°C
LTC2368H........................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
CHAIN
VDD
GND
IN+
IN
GND
REF
REF
1
2
3
4
5
6
7
8
TOP VIEW
17
GND
16 GND
15 OVDD
14 SDO
13 SCK
12 RDL/SDI
11 BUSY
10 GND
9 CNV
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 40°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
CHAIN 1
GVIINDNNDD+–
2
3
4
5
GND 6
REF 7
REF 8
16 GND
15
14
SODVDOD
13 SCK
12 RDL/SDI
11 BUSY
10 GND
9 CNV
MS PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 110°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2368CMS-18#PBF
LTC2368CMS-18#TRPBF 236818
16-Lead Plastic MSOP
0°C to 70°C
LTC2368IMS-18#PBF
LTC2368IMS-18#TRPBF 236818
16-Lead Plastic MSOP
–40°C to 85°C
LTC2368HMS-18#PBF
LTC2368HMS-18#TRPBF 236818
16-Lead Plastic MSOP
–40°C to 125°C
LTC2368CDE-18#PBF
LTC2368CDE-18#TRPBF 23688
16-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LTC2368IDE-18#PBF
LTC2368IDE-18#TRPBF 23688
16-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
236818f
2


Features FEATURES n 1Msps Throughput Rate n ±2 .5LSB INL (Max) n Guaranteed 18-Bit No Missing Codes n Low Power: 13.5mW at 1Msps, 13.5µW at 1ksps n 97dB SNR (Ty p) at fIN = 2kHz n –120dB THD (Typ) a t fIN = 2kHz n Guaranteed Operation to 125°C n 2.5V Supply n Pseudo-Differ ential Unipolar Input Range: 0V to 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-Compat ible Serial I/O with Daisy-Chain Mode n Internal Conversion Clock n 16-Lead MSOP and 4mm × 3mm DFN Packages APPLIC ATIONS n Medical Imaging n High Speed Data Acquisition n Portable or Compac t Instrumentation n Industrial Process Control n Low Power Battery-Operated Instrumentation n ATE LTC2368-18 18-Bi t, 1Msps, PseudoDifferential Unipolar S AR ADC with 97dB SNR DESCRIPTION The LT C®2368-18 is a low noise, low power, h igh speed 18-bit successive approximati on register (SAR) ADC. Operating from a 2.5V supply, the LTC2368-18 has a 0V to VREF pseudo-differential unip.
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