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LTC2486CDE#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36
LTC2486
1
2486fe
For more information www.linear.com/LTC2486
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
16-Bit 2-/4-Channel ΔS ADC
with PGA and Easy Drive
Input Current Cancellation
The LT C
®
2486 is a 4-channel (2-channel differential),
16-bit, No Latency ΔS™ ADC with 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 rail-to-
rail input signals to be directly digitized while maintaining
exceptional DC accuracy.
The LTC2486 includes programmable gain, a high accuracy
temperature sensor, and an integrated oscillator. This de
-
vice can be configured to measure an external signal (from
combinations
of 4 analog input channels operating in single
ended or differential modes) or its internal temperature
sensor. It can be programmed to reject line frequencies of
50Hz, 60Hz, or simultaneous 50Hz/60Hz, provide a pro
-
grammable gain
from
1 to 256 in 8 steps, and configured to
double its output rate. The integrated temperature sensor
offers 1/2°C resolution and 2°C absolute accuracy.
The LTC2486 allows a wide common mode input range
(0V to V
CC
), independent of the reference voltage. Any
combination of single-ended or differential inputs can
be selected and the first conversion after a new channel
selection is valid.
L, LT , LT C , LT M , Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. No Latency ΔS and Easy Drive are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Data Acquisition System with Temperature Compensation
n
Up to 2 Differential or 4 Single-Ended Inputs
n
Easy Drive Technology Enables Rail-to-Rail Inputs
with Zero Differential Input Current
n
Directly Digitizes High Impedance Sensors with
Full Accuracy
n
600nV RMS Noise
n
Programmable Gain from 1 to 256
n
Integrated High Accuracy Temperature Sensor
n
GND to V
CC
Input/Reference Common Mode Range
n
Programmable 50Hz, 60Hz, or Simultaneous
50Hz/60Hz Rejection Mode
n
2ppm INL, No Missing Codes
n
1ppm Offset and 15ppm Full-Scale Error
n
2x Speed Mode/Reduced Power Mode (15Hz Using
Internal Oscillator and 80µA at 7.5Hz Output)
n
No Latency: Digital Filter Settles in a Single Cycle,
Even After a New Channel is Selected
n
Single Supply 2.7V to 5.5V Operation (0.8mW)
n
Internal Oscillator
n
Tiny 4mm × 3mm DFN Package
n
Direct Sensor Digitizer
n
Direct Temperature Measurement
n
Instrumentation
n
Industrial Process Control
Absolute Temperature Error
SDI
SCK
SDO
CS
f
O
REF
+
V
CC
2.7V TO 5.5V
10µF
COM
REF
–
16-BIT ∆Σ ADC
WITH EASY-DRIVE
4-CHANNEL
MUX
TEMPERATURE
SENSOR
IN
+
IN
–
2486 TA01a
4-WIRE
SPI INTERFACE
CH0
CH1
CH3
CH2
0.1µF
OSC
TEMPERATURE (°C)
–55 –30 –5
ABSOLUTE ERROR (°C)
5
4
3
2
1
–4
–3
–2
–1
0
120
95704520
2486 TA01b
–5
LTC2486
2
2486fe
For more information www.linear.com/LTC2486
ELECTRICAL CHARACTERISTICS (NORMAL SPEED)
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
) ................................... –0.3V to 6V
Analog Input Voltage
(CH0
to
CH3, COM) ................... –0.3V to (V
CC
+ 0.3V)
REF
+
, REF
–
................................ –0.3V to (V
CC
+ 0.3V)
Digital Input Voltage......................–0.3V to (V
CC
+ 0.3V)
Digital Output Voltage ...................–0.3V to (V
CC
+ 0.3V)
Operating Temperature Range
LTC24
86C
................................................ 0°C to 70°C
LTC2486I
.............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
(Notes 1, 2)
The
l denotes the specifications which
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1V ≤ V
REF
≤ V
CC
, –FS ≤ V
IN
≤ +FS (Note 5) 16 Bits
Integral Nonlinearity 5V ≤ V
CC
≤ 5.5V, V
REF
= 5V, V
IN(CM)
= 2.5V (Note 6)
2.7V ≤ V
CC
≤ 5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.25V (Note 6)
l
2
1
20 ppm of V
REF
ppm of V
REF
Offset Error 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 14)
l
0.5 5 µV
Offset Error Drift 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
10 nV/°C
Positive Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.75V
REF
, IN
–
= 0.25V
REF
l
32 ppm of V
REF
Positive Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.75V
REF
, IN
–
= 0.25V
REF
0.1 ppm of V
REF
/°C
Negative Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.25V
REF
, IN
–
= 0.75V
REF
l
32 ppm of V
REF
Negative Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.25V
REF
, IN
–
= 0.75V
REF
0.1 ppm of V
REF
/°C
Total Unadjusted Error 5V ≤ V
CC
≤ 5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.25V
5V ≤ V
CC
≤ 5.5V, V
REF
= 5V, V
IN(CM)
= 2.5V
2.7V ≤ V
CC
≤ 5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.25V
15
15
15
ppm of V
REF
ppm of V
REF
ppm of V
REF
Output Noise 5.5V < V
CC
< 2.7V, 2.5V ≤ V
REF
≤ V
CC
,
GND ≤ IN
+
= IN
–
≤ V
CC
(Note 13)
0.6 µV
RMS
Internal PTAT Signal T
A
= 27°C (Note 14) 27.8 28.0 28.2 mV
Internal PTAT Temperature Coefficient 93.5 µV/°C
Programmable Gain
l
1 256
PIN CONFIGURATION
1
2
3
4
5
6
7
14
13
12
11
10
9
8
REF
–
REF
+
V
CC
CH3
CH2
CH1
CH0
F
O
SDI
SCK
CS
SDO
GND
COM
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
15
T
JMAX
= 125°C, θ
JA
= 37°C/W
EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2486CDE#PBF LTC2486CDE#TRPBF 2486
14-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LTC2486IDE#PBF LTC2486IDE#TRPBF 2486
14-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 LT C 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/
LTC2486
3
2486fe
For more information www.linear.com/LTC2486
ELECTRICAL CHARACTERISTICS (2X SPEED)
The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1V ≤ V
REF
≤ V
CC
, –FS ≤ V
IN
≤ +FS (Note 5) 16 Bits
Integral Nonlinearity 5V ≤ V
CC
≤ 5.5V, V
REF
= 5V, V
IN(CM)
= 2.5V (Note 6)
2.7V ≤ V
CC
≤5.5V, V
REF
= 2.5V, V
IN(CM)
= 1.25V (Note 6)
l
l
2
1
20 ppm of V
REF
ppm of V
REF
Offset Error 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 14)
l
0.2 2 mV
Offset Error Drift 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
100 nV/°C
Positive Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.75V
REF
, IN
–
= 0.25V
REF
l
32 ppm of V
REF
Positive Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.75V
REF
, IN
–
= 0.25V
REF
0.1 ppm of V
REF
/°C
Negative Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.25V
REF
, IN
–
= 0.75V
REF
l
32 ppm of V
REF
Negative Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
, IN
+
= 0.25V
REF
, IN
–
= 0.75V
REF
0.1 ppm of V
REF
/°C
Output Noise 2.7V ≤ V
CC
≤ 5.5V, 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
0.85 µV
RMS
Programmable Gain
l
1 128
CONVERTER CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Common Mode Rejection DC 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
140 dB
Input Common Mode Rejection 50Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
140 dB
Input Common Mode Rejection 60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
140 dB
Input Normal Mode Rejection 50Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 7)
l
110 120 dB
Input Normal Mode Rejection 60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 8)
l
110 120 dB
Input Normal Mode Rejection 50Hz/60Hz ±2% 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Notes 5, 9)
l
87 dB
Reference Common Mode Rejection DC 2.5V ≤ V
REF
≤ V
CC
, GND ≤ IN
+
= IN
–
≤ V
CC
(Note 5)
l
120 140 dB
Power Supply Rejection DC V
REF
= 2.5V, IN
+
= IN
–
= GND 120 dB
Power Supply Rejection, 50Hz ±2% V
REF
= 2.5V, IN
+
= IN
–
= GND (Notes 7, 9) 120 dB
Power Supply Rejection, 60Hz ±2% V
REF
= 2.5V, IN
+
= IN
–
= GND (Notes 8, 9) 120 dB
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LTC2486CDE#TRPBF

Mfr. #:
Buy LTC2486CDE#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 16-bit, 4-ch Delta Sigma ADC w/ Temp Sensor PGA
Lifecycle:
New from this manufacturer.
Delivery:
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