LTC2480 16-Bit ADC Datasheet

LTC2480 Datasheet, PDF, Equivalent


Part Number

LTC2480

Description

16-Bit ADC

Manufacture

Linear Technology

Total Page 30 Pages
Datasheet
Download LTC2480 Datasheet


LTC2480
LTC2480
16-Bit ∆Σ ADC with Easy Drive
Input Current Cancellation
FEATURES
DESCRIPTION
n Extended Temperature Range of –40°C to 125°C
n Easy Drive Technology Enables Rail-to-Rail Inputs
with Zero Differential Input Current
n Directly Digitizes High Impedance Sensors with
Full Accuracy
n Programmable Gain from 1 to 256
n GND to VCC Input/Reference Common Mode Range
n Programmable 50Hz, 60Hz or Simultaneous
50Hz/60Hz Rejection Mode
n 2ppm (0.25LSB) INL, No Missing Codes
n 1ppm Offset and 15ppm Full-Scale Error
n Selectable 2x Speed Mode (15Hz Using Internal
Oscillator)
n No Latency: Digital Filter Settles in a Single Cycle
n Single Supply 2.7V to 5.5V Operation
n Internal Oscillator
n Available in a Tiny (3mm × 3mm) 10-Lead
DFN Package and 10-Lead MSOP Package
APPLICATIONS
n Direct Sensor Digitizer
n Weight Scales
n Direct Temperature Measurement
n Strain Gauge Transducers
n Instrumentation
n Industrial Process Control
n DVMs and Meters
The LTC®2480 combines a 16-bit plus sign No Latency
∆Σ™ analog-to-digital converter with patented Easy Drive™
technology. The patented sampling scheme eliminates
dynamic input current errors and the shortcomings of on-
chip buffering through automatic cancellation of differential
input current. This allows large external source impedances
and input signals, with rail-to-rail input range to be directly
digitized while maintaining exceptional DC accuracy.
The LTC2480 includes on-chip programmable gain and
an oscillator. The LTC2480 can be configured to provide a
programmable gain from 1 to 256 in 8 steps, measure an
external signal or internal temperature sensor and reject
line frequencies. 50Hz, 60Hz or simultaneous 50Hz/60Hz
line frequency rejection can be selected as well as a 2x
speed-up mode.
The LTC2480 allows a wide common mode input range
(0V to VCC) independent of the reference voltage. The
reference can be as low as 100mV or can be tied directly
to VCC. The LTC2480 includes an on-chip trimmed oscil-
lator eliminating the need for external crystals or oscil-
lators. Absolute accuracy and low drift are automatically
maintained through continuous, transparent, offset and
full-scale calibration.
L, LT, LTC and LTM, Linear Technology and the Linear logo are registered trademarks and
No Latency ∆Σ and Easy Drive are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Patents pending.
TYPICAL APPLICATION
VCC
0.1µF
10k
SENSE
IDIFF = 0
10k 0.1µF
VIN+ VREF
VCC
LTC2480
VIN–
GND
fO
1µF
SDI
SDO
SCK
CS
2480 TA01
4-WIRE
SPI INTERFACE
+FS Error vs RSOURCE at IN+ and IN
80 VCC = 5V
60
40
VVVRIINNE+–F
=
=
=
5V
3.75V
1.25V
fO = GND
20 TA = 25°C
0
CIN = 1µF
–20
–40
–60
–80
1
10 100 1k 10k 100k
RSOURCE (Ω)
2480 TA04
For more information www.linear.com/LTC2480
2480fe
1

LTC2480
LTC2480
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
Supply Voltage (VCC) to GND....................... –0.3V to 6V
Analog Input Voltage to GND........ –0.3V to (VCC + 0.3V)
Reference Input Voltage to GND... –0.3V to (VCC + 0.3V)
Digital Input Voltage to GND......... –0.3V to (VCC + 0.3V)
Digital Output Voltage to GND....... –0.3V to (VCC + 0.3V)
Operating Temperature Range
LTC2480C................................................ 0°C to 70°C
LTC2480I ............................................ –40°C to 85°C
LTC2480H ......................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
SDI
VCC
VREF
IN+
IN
1
2
3
4
5
10 fO
11
GND
9 SCK
8 GND
7 SDO
6 CS
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
SDI 1
VCC 2
VRINE+F
3
4
IN5
TOP VIEW
10 fO
9 SCK
8 GND
7 SDO
6 CS
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 120°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2480CDD#PBF
LTC2480IDD#PBF
LTC2480CDD#TRPBF
LTC2480IDD#TRPBF
LBJY
LBJY
10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN
0°C to 70°C
–40°C to 85°C
LTC2480CMS#PBF
LTC2480CMS#TRPBF LTCWB
10-Lead Plastic MSOP
0°C to 70°C
LTC2480IMS#PBF
LTC2480IMS#TRPBF
LTCWB
10-Lead Plastic MSOP
–40°C to 85°C
LTC2480HDD#PBF
LTC2480HDD#TRPBF
LBJY
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LTC2480HMS#PBF
LTC2480HMS#TRPBF LTCWB
10-Lead Plastic MSOP
–40°C to 125°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/
2480fe
2 For more information www.linear.com/LTC2480


Features LTC2480 16-Bit ∆Σ ADC with Easy Drive Input Current Cancellation FEATURES DESCRIPTION n Extended Temperature Ra nge of –40°C to 125°C n Easy Drive Technology Enables Rail-to-Rail Inputs with Zero Differential Input Curren t n Directly Digitizes High Impedance Sensors with Full Accuracy n Program mable Gain from 1 to 256 n GND to VCC Input/Reference Common Mode Range n Pr ogrammable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode n 2ppm (0.25 LSB) INL, No Missing Codes n 1ppm Offs et and 15ppm Full-Scale Error n Select able 2x Speed Mode (15Hz Using Internal Oscillator) n No Latency: Digital Fil ter Settles in a Single Cycle n Single Supply 2.7V to 5.5V Operation n Inter nal Oscillator n Available in a Tiny ( 3mm × 3mm) 10-Lead DFN Package and 1 0-Lead MSOP Package APPLICATIONS n Dir ect Sensor Digitizer n Weight Scales n Direct Temperature Measurement n Str ain Gauge Transducers n Instrumentation n Industrial Process Control n DVMs and Meters The LTC®2480 combine.
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