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LTC2452CTS8#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LTC2452
1
2452fd
For more information www.linear.com/LTC2452
Typical applicaTion
FeaTures
applicaTions
DescripTion
Ultra-Tiny, Differential, 16-Bit
∆
Σ ADC with SPI Interface
The LT C
®
2452 is an ultra-tiny, fully differential, 16-bit,
analog-to-digital converter. The LTC2452 uses a single
2.7V to 5.5V supply and communicates through an SPI
interface. The ADC is available in an 8-pin, 3mm
×
2mm
DFN package or TSOT-23 package. It includes an integrated
oscillator that does not require any external components.
It uses a delta-sigma modulator as a converter core and
has no latency for multiplexed applications. The LTC2452
includes a proprietary input sampling scheme that reduces
the average input sampling current several orders of
magnitude when compared to conventional delta-sigma
converters. Additionally, due to its architecture, there is
negligible current leakage between the input pins.
The LTC2452 can sample at 60 conversions per second,
and due to the very large oversampling ratio, has extremely
relaxed anti-aliasing requirements. The LTC2452 includes
continuous internal offset and full-scale calibration algo
-
rithms which are
transparent to the user, ensuring accuracy
over time and over the operating temperature range. The
converter has an external REF pin and the differential input
voltage range can extend up to ±V
REF
.
Following a single conversion, the LTC2452 can automati-
cally
enter a sleep mode and reduce its supply current to
less
than 0.2µA. If the user reads the ADC once a second,
the LTC2452 consumes an average of less than 50µW
from a 2.7V supply.
Integral Nonlinearity, V
CC
= 3V
n
±V
CC
Differential Input Range
n
16-Bit Resolution (Including Sign), No Missing
Codes
n
2LSB Offset Error
n
4LSB Full-Scale Error
n
60 Conversions Per Second
n
Single Conversion Settling Time for Multiplexed
Applications
n
Single-Cycle Operation with Auto Shutdown
n
800µA Supply Current
n
0.2µA Sleep Current
n
Internal Oscillator—No External Components
Required
n
SPI Interface
n
Ultra-Tiny 3mm × 2mm DFN and TSOT-23 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 , LT C , LT M, Linear Technology and the Linear logo are registered trademarks and No
Latency ∆Σ 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.
DIFFERENTIAL INPUT VOLTAGE (V)
–3
INL (LSB)
1
3
2452 TA01b
–1
0
2
–2
–3
–1–2
1 2
0
3
T
A
= –45°C, 25°C, 90°C
10k
10k
10k
R
CS
3-WIRE SPI
INTERFACE
SCK
SDO
0.1µF
0.1µF 10µF
2.7V TO 5.5V
0.1µF
IN
+
REF V
CC
GND
IN
–
LTC2452
2452 TA01a
LTC2452
2
2452fd
For more information www.linear.com/LTC2452
pin conFiguraTion
absoluTe MaxiMuM raTings
Supply Voltage (V
CC
) ................................... –0.3V to 6V
Analog Input Voltage (V
IN
+
, V
IN
–
) .–0.3V to (V
CC
+ 0.3V)
Reference Voltage (V
REF
) .............. –0.3V to (V
CC
+ 0.3V)
Digital Voltage (V
SDO
, V
SCK
, V
CS
) .–0.3V to (V
CC
+ 0.3V)
(Notes 1, 2)
TOP VIEW
9
DD8 PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
5
6
7
8
4
3
2
1SCK
GND
REF
V
CC
SDO
CS
IN
+
IN
–
C/I GRADE T
JMAX
= 125°C, θ
JA
= 76°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
SCK 1
GND 2
REF 3
V
CC
4
8 SDO
7 CS
6 IN
+
5 IN
–
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
C/I GRADE T
JMAX
= 125°C, θ
JA
= 140°C/W
orDer inForMaTion
elecTrical characTerisTics
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) (Note 3)
l
16 Bits
Integral Nonlinearity (Note 4)
l
1 10 LSB
Offset Error
l
2 10 LSB
Offset Error Drift 0.02 LSB/°C
Gain Error
l
0.01 0.02 % of FS
Gain Error Drift 0.02 LSB/°C
Transition Noise 2.2 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)
Lead Free Finish
TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2452CDDB#TRMPBF LTC2452CDDB#TRPBF LDNJ 8-Lead Plastic (3mm × 2mm) DFN 0°C to 70°C
LTC2452IDDB#TRMPBF LTC2452IDDB#TRPBF LDNJ 8-Lead Plastic (3mm × 2mm) DFN –40°C to 85°C
LTC2452CTS8#TRMPBF LTC2452CTS8#TRPBF LTDPK 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2452ITS8#TRMPBF LTC2452ITS8#TRPBF LTDPK 8-Lead Plastic TSOT-23 –40°C to 85°C
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LT C Marketing for parts specified with wider operating temperature ranges.
Consult LT C Marketing for information on 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/
Storage Temperature Range .................. –65°C to 150°C
Operating Temperature Range
LTC2452C ................................................ 0°C to 70°C
LTC2452I .............................................–40°C to 85°C
LTC2452
3
2452fd
For more information www.linear.com/LTC2452
analog inpuTs anD reFerences
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
Sleep
CS = GND (Note 6)
CS = V
CC
(Note 6)
l
l
800
0.2
1200
0.6
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
l
0 V
REF
V
V
IN
–
Negative Input Voltage Range
l
0 V
REF
V
V
REF
Reference Voltage Range
l
2.5 V
CC
V
V
OR
+
+ V
UR
+
Overrange + Underrange Voltage, IN
+
V
REF
= 5V, V
IN
–
= 2.5V (See Figure 3) 31 LSB
V
OR
–
+ V
UR
–
Overrange + Underrange Voltage, IN– V
REF
= 5V, V
IN
+
= 2.5V (See Figure 3) 31 LSB
C
IN
IN
+
, IN
–
Sampling Capacitance 0.35 pF
I
DC_LEAK(IN
+
)
IN
+
DC Leakage Current V
IN
= GND (Note 10)
V
IN
= V
CC
(Note 10)
l
l
–10
–10
1
1
10
10
nA
nA
I
DC_LEAK(IN
–
)
IN
–
DC Leakage Current V
IN
= GND (Note 10)
V
IN
= V
CC
(Note 10)
l
l
–10
–10
1
1
10
10
nA
nA
I
DC_LEAK(REF)
REF DC Leakage Current V
REF
= 3V (Note 10)
l
–10 1 10 nA
I
CONV
Input Sampling Current (Note 5) 50 nA
The l denotes the specifications which apply over the full
operating temperature range,otherwise specifications are at T
A
= 25°C. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage
l
V
CC
– 0.3 V
V
IL
Low Level Input Voltage
l
0.3 V
I
IN
Digital Input Current
l
–10 10 µA
C
IN
Digital Input Capacitance 10 pF
V
OH
High Level Output Voltage I
O
= –800µA
l
V
CC
– 0.5 V
V
OL
Low Level Output Voltage I
O
= 1.6mA
l
0.4 V
I
OZ
Hi-Z Output Leakage Current
l
–10 10 µA
DigiTal inpuTs anD DigiTal ouTpuTs
power requireMenTs
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

LTC2452CTS8#TRMPBF

Mfr. #:
Buy LTC2452CTS8#TRMPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 16-bit 60Hz SPI Differential Ultra-Tiny Delta Sigma ADC
Lifecycle:
New from this manufacturer.
Delivery:
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