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LTC2471IDD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC2471/LTC2473
1
24713fb
For more information www.linear.com/LTC2471
–50 –10 10–30 50 7030 90
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
1.2520
1.2515
1.2510
1.2505
1.2500
24713 TA01b
1.2480
1.2485
1.2490
1.2495
Typical applicaTion
FeaTures
applicaTions
DescripTion
Selectable 208sps/833sps,
16-Bit I
2
C ΔΣ ADCs with 10ppm/°C
Max Precision Reference
The LTC
®
2471/LTC2473 are small, 16-bit analog-to-digital
converters with an integrated precision reference and
a selectable 208sps or 833sps output rate. They use a
single 2.7V to 5.5V supply and communicate through an
I
2
C Interface. The LTC2471 is single-ended with a 0V to
V
REF
input range and the LTC2473 is differential with a
±V
REF
input range. Both ADCs include a 1.25V integrated
reference with 2ppm/°C drift performance and 0.1% initial
accuracy. The converters are available in a 12-pin DFN
3mm × 3mm package or an MSOP-12 package. They
include an integrated oscillator and perform conversions
with no latency for multiplexed applications. The LTC2471/
LTC2473 include a proprietary input sampling scheme
that reduces the average input current several orders of
magnitude when compared to conventional delta sigma
converters.
Following a single conversion, the LTC2471/LTC2473
automatically power down the converter and can also be
configured to power down the reference. When both the
ADC and reference are powered down, the supply current
is reduced to 200nA.
The LTC2471/LTC2473 include a user selectable 208sps
or 833sps output rate and due to a large oversampling
ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed
anti-aliasing requirements.
V
REF
vs Temperature
n
16-Bit Resolution
n
Internal, High Accuracy Reference—10ppm/°C (Max)
n
Single-Ended (LTC2471) or Differential (LTC2473)
n
Selectable 208sps/833sps Output Rate
n
1mV Offset Error
n
0.01% Gain Error
n
Single Conversion Settling Time Simplifies
Multiplexed Applications
n
Single-Cycle Operation with Auto Shutdown
n
3.5mA (Typ) Supply Current
n
2µA (Max) Sleep Current
n
Internal Oscillator—No External Components
Required
n
I
2
C Interface
n
Small 12-Lead, 3mm × 3mm DFN and MSOP
Packages
n
System Monitoring
n
Environmental Monitoring
n
Direct Temperature Measurements
n
Instrumentation
n
Industrial Process Control
n
Data Acquisition
n
Embedded ADC Upgrades
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation and Easy Drive and No Latency ∆∑ is a trademark of Linear Technology
Corporation. All other trademarks are the property of their respective owners. Protected by U.S.
Patents, including 6208279, 6411242, 7088280, 7164378.
10k
10k
10k
R
SCL
I
2
C
INTERFACE
SDA
0.1µF
0.1µF
2.7V TO 5.5V
10µF
0.1µF
IN
+
REFOUT
REF
–
V
CC
0.1µF
COMP
GND
AO
IN
–
0.1µF
LTC2473
24713 TA01a
LTC2471/LTC2473
2
24713fb
For more information www.linear.com/LTC2471
pin conFiguraTion
absoluTe MaxiMuM raTings
Supply Voltage (V
CC
) ................................... –0.3V to 6V
Analog Input Voltage (V
IN
+
, V
IN
–
,
V
IN
, V
REF
–
, V
COMP
, V
REFOUT
) ..........–0.3V to (V
CC
+ 0.3V)
Digital Voltage (V
SDA
, V
SCL
, V
AO
) ....–0.3V to (V
CC
+ 0.3V)
(Notes 1, 2)
orDer inForMaTion
Storage Temperature Range .................. –65°C to 150°C
Operating Temperature Range
LTC2471C/LTC2473C ............................... 0°C to 70°C
LTC2471I/LTC2473I .............................–40°C to 85°C
LTC2473 LTC2473
TOP VIEW
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
8
9
10
4
5
3
2
1
V
CC
GND
IN
–
IN
+
REF
–
GND
REFOUT
COMP
AO
GND
SCL
SDA
6
7
13
GND
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) PCB GROUND CONNECTION
1
2
3
4
5
6
REFOUT
COMP
AO
GND
SCL
SDA
12
11
10
9
8
7
V
CC
GND
IN
–
IN
+
REF
–
GND
TOP VIEW
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 130°C/W
LTC2471 LTC2471
TOP VIEW
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
12
11
8
9
10
4
5
3
2
1
V
CC
GND
GND
IN
REF
–
GND
REFOUT
COMP
AO
GND
SCL
SDA
6
7
13
GND
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 13) PCB GROUND CONNECTION
1
2
3
4
5
6
REFOUT
COMP
AO
GND
SCL
SDA
12
11
10
9
8
7
V
CC
GND
GND
IN
REF
–
GND
TOP VIEW
MS PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 130°C/W
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2471CDD#PBF LTC2471CDD#TRPBF LFPW 12-Lead Plastic (3mm × 3mm) DFN 0°C to 70°C
LTC2471IDD#PBF LTC2471IDD#TRPBF LFPW 12-Lead Plastic (3mm × 3mm) DFN –40°C to 85°C
LTC2471CMS#PBF LTC2471CMS#TRPBF 2471 12-Lead Plastic MSOP 0°C to 70°C
LTC2471IMS#PBF LTC2471IMS#TRPBF 2471 12-Lead Plastic MSOP –40°C to 85°C
LTC2473CDD#PBF LTC2473CDD#TRPBF LFPX 12-Lead Plastic (3mm × 3mm) DFN 0°C to 70°C
LTC2473IDD#PBF LTC2473IDD#TRPBF LFPX 12-Lead Plastic (3mm × 3mm) DFN –40°C to 85°C
LTC2473CMS#PBF LTC2473CMS#TRPBF 2473 12-Lead Plastic MSOP 0°C to 70°C
LTC2473IMS#PBF LTC2473IMS#TRPBF 2473 12-Lead Plastic MSOP –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/
LTC2471/LTC2473
3
24713fb
For more information www.linear.com/LTC2471
elecTrical characTerisTics
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution 16 Bits
Integral Nonlinearity Output Rate 208sps (Note 4)
Output Rate 833sps (Note 4)
l
l
2
8
8.5
16
LSB
LSB
Offset Error
l
±1 ±2.5 mV
Offset Error Drift 0.05 LSB/°C
Gain Error
l
±0.01 ±0.25 % of FS
Gain Error Drift
l
0.15 LSB/°C
Transition Noise 3 µV
RMS
Power Supply Rejection DC 80 dB
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
analog inpuTs
The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage
l
2.7 5.5 V
I
CC
Supply Current
Conversion
Conversion
Nap
Sleep
LTC2473 (Note 8)
LTC2471 (Note 8)
(Note 8)
(Note 8)
l
l
l
l
3.5
2.5
800
0.2
5
4
1500
2
mA
mA
µA
µA
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
+
Positive Input Voltage Range LTC2473
l
0 V
REF
V
V
IN
–
Negative Input Voltage Range LTC2473
l
0 V
REF
V
V
IN
Input Voltage Range LTC2471
l
0 V
REF
V
V
OR
+
, V
UR
+
Overrange/Underrange Voltage, IN
+
V
IN
–
= 0.625V 8 LSB
V
OR
–
, V
UR
–
Overrange/Underrange Voltage, IN– V
IN
+
= 0.625V 8 LSB
C
IN
IN
+
, IN
–
, IN Sampling Capacitance 0.35 pF
I
DC_LEAK(IN
+
, IN
–
, IN)
IN
+
, IN
–
DC Leakage Current (LTC2473)
IN DC Leakage Current (LTC2471)
V
IN
= GND (Note 8)
V
IN
= V
CC
(Note 8)
l
l
–10
–10
±1
±1
10
10
nA
nA
I
CONV
Input Sampling Current (Notes 5, 8) 50 nA
V
REF
Reference Output Voltage
l
1.247 1.25 1.253 V
Reference Voltage Coefficient (Note 9)
C-Grade
I-Grade
l
±2
±5
±10
ppm/°C
ppm/°C
Reference Line Regulation 2.7V ≤ V
CC
≤ 5.5V –90 dB
Reference Short-Circuit Current V
CC
= 5.5, Forcing Output to GND (Note 8)
l
35 mA
COMP Pin Short-Circuit Current V
CC
= 5.5, Forcing Output to GND (Note 8)
l
200 µA
Reference Load Regulation 2.7V ≤ V
CC
≤ 5.5V, I
OUT
= 100μA Sourcing 3.5 mV/mA
Reference Output Noise Density C
COMP
= 0.1μF, C
REFOUT
= 0.1μF, At f =
1ksps
30 nV/√Hz
power requireMenTs
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LTC2471IDD#PBF

Mfr. #:
Buy LTC2471IDD#PBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC Selectable 208Hz/833Hz, Single-Ended, 16-Bit delta sigma ADC with 10ppm/deg C Max Reference and I2C Interface
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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