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Linear Technology Electronic Components Datasheet

LTC2376CMS-20 Datasheet

Low Power SAR ADC

No Preview Available !

Features
nn 250ksps Throughput Rate
nn ±0.5ppm INL (Typ)
nn Guaranteed 20-Bit No Missing Codes
nn Low Power: 5.3mW at 250ksps, 5.3µW at 250sps
nn 104dB SNR (Typ) at fIN = 2kHz
nn –125dB THD (Typ) at fIN = 2kHz
nn Digital Gain Compression (DGC)
nn Guaranteed Operation to 85°C
nn 2.5V Supply
nn Fully Differential Input Range ±VREF
nn VREF Input Range from 2.5V to 5.1V
nn No Pipeline Delay, No Cycle Latency
nn 1.8V to 5V I/O Voltages
nn SPI-Compatible Serial I/O with Daisy-Chain Mode
nn Internal Conversion Clock
nn 16-Lead MSOP and 4mm × 3mm DFN Packages
Applications
nn Medical Imaging
nn High Speed Data Acquisition
nn Portable or Compact Instrumentation
nn Industrial Process Control
nn Low Power Battery-Operated Instrumentation
nn 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.
LTC2376-20
20-Bit, 250ksps, Low Power
SAR ADC with 0.5ppm INL
Description
The LTC®2376-20 is a low noise, low power, high speed
20-bit successive approximation register (SAR) ADC. Op-
erating from a 2.5V supply, the LTC2376-20 has a ±VREF
fully differential input range with VREF ranging from 2.5V
to 5.1V. The LTC2376-20 consumes only 5.3mW and
achieves ±2ppm INL maximum, no missing codes at 20
bits with 104dB SNR.
The LTC2376-20 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 250ksps
throughput with no cycle latency makes the LTC2376-20
ideally suited for a wide variety of high speed applications.
An internal oscillator sets the conversion time, easing exter-
nal timing considerations. The LTC2376-20 automatically
powers down between conversions, leading to reduced
power dissipation that scales with the sampling rate.
The LTC2376-20 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
LTC2376-20
SCK
10Ω
IN
6800pF
REF
BUSY
CNV
GND REF/DGC
2.5V TO 5.1V
237620 TA01
47µF
(X7R, 1210 SIZE)
SAMPLE CLOCK
VREF
For more information www.linear.com/LTC2376-20
Integral Nonlinearity vs Output Code
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–524288
–262144
0
262144 524288
OUTPUT CODE
237620 TA02
237620fb
1


Linear Technology Electronic Components Datasheet

LTC2376CMS-20 Datasheet

Low Power SAR ADC

No Preview Available !

LTC2376-20
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
LTC2376C................................................. 0°C to 70°C
LTC2376I..............................................–40°C to 85°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/DGC 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
VDD 2
GND 3
IN+ 4
IN5
GND 6
REF 7
REF/DGC 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 http://www.linear.com/product/LTC2376-20#orderinfo
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2376CMS-20#PBF LTC2376CMS-20#TRPBF 237620
16-Lead Plastic MSOP
0°C to 70°C
LTC2376IMS-20#PBF
LTC2376IMS-20#TRPBF 237620
16-Lead Plastic MSOP
–40°C to 85°C
LTC2376CDE-20#PBF
LTC2376CDE-20#TRPBF 23760
16-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LTC2376IDE-20#PBF
LTC2376IDE-20#TRPBF 23760
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.
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/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
237620fb
2
For more information www.linear.com/LTC2376-20


Part Number LTC2376CMS-20
Description Low Power SAR ADC
Maker Linear Technology
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