LTC2378-20 반도체 회로 부품 판매점
Low Power SAR ADC
|
|
 Linear Technology |
FEATURES
n 1Msps Throughput Rate
n ±0.5ppm INL (Typ)
n Guaranteed 20-Bit No Missing Codes
n Low Power: 21mW at 1Msps, 21µW at 1ksps
n 104dB SNR (Typ) at fIN = 2kHz
n –125dB THD (Typ) at fIN = 2kHz
n Digital Gain Compression (DGC)
n Guaranteed Operation to 85°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. Patents Pending. Protected by U.S. Patents, including
7705765, 7961132, 8319673.
LTC2378-20
20-Bit, 1Msps, Low Power
SAR ADC with 0.5ppm INL
DESCRIPTION
The LTC®2378-20 is a low noise, low power, high speed
20-bit successive approximation register (SAR) ADC.
Operating from a 2.5V supply, the LTC2378-20 has a
±VREF fully differential input range with VREF ranging from
2.5V to 5.1V. The LTC2378-20 consumes only 21mW and
achieves ±2ppm INL maximum, no missing codes at 20
bits with 104dB SNR.
The LTC2378-20 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
throughput with no cycle latency makes the LTC2378-20
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2378-20 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
The LTC2378-20 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
+
10Ω
6800pF
VDD OVDD CHAIN
IN+
RDL/SDI
SDO
3300pF
LTC2378-20
SCK
–
10Ω
IN–
6800pF
REF
BUSY
CNV
GND REF/DGC
2.5V TO 5.1V
237820 TA01
47µF
(X7R, 1210 SIZE)
SAMPLE CLOCK
VREF
For more information www.linear.com/LTC2378-20
Integral Nonlinearity vs Output Code
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
0
262144 524288 786432 1048576
OUTPUT CODE
237820 TA02
237820fa
1
LTC2378-20
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)
REF/DGC Input (Note 3)..... (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
LTC2378C................................................. 0°C to 70°C
LTC2378I..............................................–40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
CHAIN
VDD
GND
IN+
IN–
GND
REF
REF/DGC
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/DGC 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
LTC2378CMS-20#PBF
LTC2378CMS-20#TRPBF 237820
16-Lead Plastic MSOP
0°C to 70°C
LTC2378IMS-20#PBF
LTC2378IMS-20#TRPBF 237820
16-Lead Plastic MSOP
–40°C to 85°C
LTC2378CDE-20#PBF
LTC2378CDE-20#TRPBF 23780
16-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LTC2378IDE-20#PBF
LTC2378IDE-20#TRPBF 23780
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/
2
For more information www.linear.com/LTC2378-20
237820fa
|
PDF 파일 내의 페이지 : 총 28 페이지
제조업체: Linear Technology
( linear )
LTC2378-20 data
데이터시트 다운로드 :
[ LTC2378-20.PDF ]
[ LTC2378-20 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
