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Linear Technology Electronic Components Datasheet

LTC2369IDE-18 Datasheet

Pseudo-Differential Unipolar SAR ADC

No Preview Available !

FEATURES
n 1.6Msps Throughput Rate
n ±2.5LSB INL (Max)
n Guaranteed 18-Bit No Missing Codes
n Low Power: 18mW at 1.6Msps, 18μW at 1.6ksps
n 96.5dB SNR (Typ) at fIN = 2kHz
n 120dB 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
LTC2369-18
18-Bit, 1.6Msps, Pseudo-
Differential Unipolar SAR
ADC with 96.5dB SNR
DESCRIPTION
The LTC®2369-18 is a low noise, low power, high speed
18-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2369-18 has a 0V
to VREF pseudo-differential unipolar input range with VREF
ranging from 2.5V to 5.1V. The LTC2369-18 consumes only
18mW and achieves ±2.5LSB INL maximum, no missing
codes at 18 bits with 96.5dB SNR.
The LTC2369-18 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 1.6Msps
throughput with no cycle latency makes the LTC2369-18
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2369-18 automatically
powers 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
5.1Ω
VDD
OVDD
CHAIN
IN+
RDL/SDI
10nF
LTC2369-18
IN
SDO
SCK
BUSY
REF
GND
CNV
2.5V TO 5.1V
236918 TA01a
47μF
(X5R, 0805 SIZE)
SAMPLE CLOCK
32k Point FFT fS = 1.6Msps, fIN = 2kHz
0
SNR = 96.5dB
–20
THD = –127dB
SINAD = 96.5dB
–40
SFDR = 134dB
–60
–80
–100
–120
–140
–160
–180
0
100 200 300 400 500 600 700 800
FREQUENCY (kHz)
236918 TA01b
236918fa
1


Linear Technology Electronic Components Datasheet

LTC2369IDE-18 Datasheet

Pseudo-Differential Unipolar SAR ADC

No Preview Available !

LTC2369-18
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
LTC2369C ................................................ 0°C to 70°C
LTC2369I .............................................–40°C to 85°C
LTC2369H.......................................... –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
CHAIN 1
VDD 2
GND 3
IN+ 4
IN5
GND 6
REF 7
REF 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 w 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
VDD 2
GND 3
IN+ 4
IN5
GND 6
REF 7
REF 8
16 GND
15 OVDD
14 SDO
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
LTC2369CMS-18#PBF
LTC2369CMS-18#TRPBF 236918
16-Lead Plastic MSOP
0°C to 70°C
LTC2369IMS-18#PBF
LTC2369IMS-18#TRPBF 236918
16-Lead Plastic MSOP
–40°C to 85°C
LTC2369HMS-18#PBF LTC2369HMS-18#TRPBF 236918
16-Lead Plastic MSOP
–40°C to 125°C
LTC2369CDE-18#PBF
LTC2369CDE-18#TRPBF 23698
16-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LTC2369IDE-18#PBF
LTC2369IDE-18#TRPBF 23698
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/
236918fa
2


Part Number LTC2369IDE-18
Description Pseudo-Differential Unipolar SAR ADC
Maker Linear Technology
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