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Linear Technology Electronic Components Datasheet

LTC2483 Datasheet

16-Bit ADC

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LTC2483
16-Bit ∆Σ ADC with Easy Drive
Input Current Cancellation and I2C Interface
FEATURES
Easy Drive Technology Enables Rail-to-Rail Inputs
with Zero Differential Input Current
Directly Digitizes High Impedance Sensors with
Full Accuracy
600nV RMS Noise, Independent of VREF
www.DataSheetG4UN.cDomto VCC Input/Reference Common Mode Range
2-Wire I2C Interface
Simultaneous 50Hz/60Hz Rejection
2ppm (0.25LSB) INL, No Missing Codes
1ppm Offset and 15ppm Full-Scale Error
No Latency: Digital Filter Settles in a Single Cycle
Single Supply 2.7V to 5.5V Operation
Internal Oscillator
Six Addresses Available and One Global Address for
Synchronization
Available in a Tiny (3mm × 3mm) 10-Lead
DFN Package
U
APPLICATIO S
Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Strain Gauge Transducers
Instrumentation
Industrial Process Control
DVMs and Meters
DESCRIPTIO
The LTC®2483 combines a 16-bit plus sign No Latency∆ΣTM
analog-to-digital converter with patented Easy DriveTM tech-
nology and I2C digital interface. 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 LTC2483 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 noise level is 600nV RMS independent of VREF.
This allows direct digitization of low level signals with 16-
bit accuracy. The LTC2483 includes an on-chip trimmed
oscillator, eliminating the need for external crystals or
oscillators and provides 87dB rejection of 50Hz and 60Hz
line frequency noise. Absolute accuracy and low drift are
automatically maintained through continuous, transpar-
ent, offset and full-scale calibration.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No Latency ∆Σ and Easy Drive are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Patent Pending.
TYPICAL APPLICATIO
VCC
1µF
10k
SENSE
10k
IDIFF = 0
1µF
REF+
VIN+
VCC
LTC2483
VIN–
GND
REF
SCL 2-WIRE
SDA I2C INTERFACE
CA0/F0
CA1
2483 TA01
6 ADDRESSES
+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 ()
2483 TA02
2483f
1


Linear Technology Electronic Components Datasheet

LTC2483 Datasheet

16-Bit ADC

No Preview Available !

LTC2483
ABSOLUTE AXI U RATI GS
(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
LTC2483C ................................................... 0°C to 70°C
LTC2483I ................................................ – 40°C to 85°C
www.DataShSeetot4rUa.gcoemTemperature Range ................ – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
REF+ 1
VCC
REF
IN+
IN
2
3
4
5
10 CA0/F0
9 CA1
11 8 GND
7 SDA
6 SCL
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
ORDER PART NUMBER
LTC2483CDD
LTC2483IDD
DD PART MARKING*
LBSR
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Notes 3, 4)
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Resolution (No Missing Codes)
Integral Nonlinearity
Offset Error
Offset Error Drift
Positive Full-Scale Error
Positive Full-Scale Error Drift
Negative Full-Scale Error
Negative Full-Scale Error Drift
Total Unadjusted Error
Output Noise
0.1 VREF VCC, –FS VIN +FS (Note 5)
16
Bits
5V VCC 5.5V, VREF = 5V, VIN(CM) = 2.5V (Note 6)
2.7V VCC 5.5V, VREF = 2.5V, VIN(CM) = 1.25V (Note 6)
2.5V VREF VCC, GND IN+ = INVCC (Note 13)
2.5V VREF VCC, GND IN+ = INVCC
2.5V VREF VCC, IN+ = 0.75VREF, IN= 0.25VREF
2 10 ppm of VREF
1 ppm of VREF
0.5 2.5
µV
10 nV/°C
25 ppm of VREF
2.5V VREF VCC, IN+ = 0.75VREF, IN= 0.25VREF
2.5V VREF VCC, IN= 0.75VREF, IN+ = 0.25VREF
2.5V VREF VCC, IN= 0.75VREF, IN+ = 0.25VREF
0.1 ppm of
VREF/°C
25 ppm of VREF
0.1 ppm of
VREF/°C
5V VCC 5.5V, VREF = 2.5V, VIN(CM) = 1.25V (Note 6)
5V VCC 5.5V, VREF = 5V, VIN(CM) = 2.5V (Note 6)
2.7V VCC 5.5V, VREF = 2.5V, VIN(CM) = 1.25V (Note 6)
5V VCC 5.5V, VREF = 5V, GND IN= IN+ VCC (Note 12)
15 ppm of VREF
15 ppm of VREF
15 ppm of VREF
0.6 µVRMS
2483f
2


Part Number LTC2483
Description 16-Bit ADC
Maker Linear Technology
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LTC2483 Datasheet PDF






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