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LTC2401IMS#TRPBF

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1
LTC2401/LTC2402
1-/2-Channel 24-Bit µPower
No Latency ∆Σ
TM
ADCs in MSOP-10
■
Weight Scales
■
Direct Temperature Measurement
■
Gas Analyzers
■
Strain Gauge Transducers
■
Instrumentation
■
Data Acquisition
■
Industrial Process Control
No Latency ∆Σ is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
Pseudo Differential Bridge Digitizer
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LTC
®
2401/LTC2402 are 1- and 2-channel 2.7V to 5.5V
micropower 24-bit analog-to-digital converters with an
integrated oscillator, 4ppm INL and 0.6ppm RMS noise.
These ultrasmall devices use delta-sigma technology and
a new digital filter architecture that settles in a single cycle.
This eliminates the latency found in conventional ∆Σ
converters and simplifies multiplexed applications.
Through a single pin, the LTC2401/LTC2402 can be
configured for better than 110dB rejection at 50Hz or
60Hz ±2%, or can be driven by an external oscillator for
a user defined rejection frequency in the range 1Hz to
120Hz. The internal oscillator requires no external fre-
quency setting components.
These converters accept an external reference voltage
from 0.1V to V
CC
. With an extended input conversion
range of –12.5% V
REF
to 112.5% V
REF
(V
REF
= FS
SET
–
ZS
SET
), the LTC2401/LTC2402 smoothly resolve the off-
set and overrange problems of preceding sensors or
signal conditioning circuits.
The LTC2401/LTC2402 communicate through a 2- or
3-wire digital interface that is compatible with SPI and
MICROWIRE
TM
protocols.
■
24-Bit ADCs in Tiny MSOP-10 Packages
■
4ppm INL, No Missing Codes
■
4ppm Full-Scale Error
■
0.5ppm Offset
■
0.6ppm Noise
■
Single Conversion Settling Time for
Multiplexed Applications
■
1- or 2-Channel Inputs
■
Automatic Channel Selection (Ping-Pong) (LTC2402)
■
Zero Scale and Full Scale Set for Reference
and Ground Sensing
■
Internal Oscillator—No External Components Required
■
110dB Min, 50Hz/60Hz Notch Filter
■
Reference Input Voltage: 0.1V to V
CC
■
Live Zero—Extended Input Range Accommodates
12.5% Overrange and Underrange
■
Single Supply 2.7V to 5.5V Operation
■
Low Supply Current (200µA) and Auto Shutdown
ANALOG INPUT RANGE
ZS
SET
– 0.12V
REF
TO
FS
SET
+ 0.12V
REF
(V
REF
= FS
SET
– ZS
SET
)
V
CC
F
O
FS
SET
ZS
SET
SCK
CH1 SDO
GND
CS
REFERENCE VOLTAGE
ZS
SET
+ 0.1V TO V
CC
0V TO FS
SET
– 100mV
CH0
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
3-WIRE
SPI INTERFACE
1µF
110
9
8
7
6
2
3
4
5
2.7V TO 5.5V
LTC2402
24012 TA01
V
CC
V
CC
FS
SET
ZS
SET
SCK
CH0
SDO
F
O
CS
CH1
GND
LTC2402
3-WIRE
SPI INTERFACE
INTERNAL OSCILLATOR
60Hz REJECTION
1
9
2.7V TO 5.5V
8
7
10
6
24012TA02
2
4
3
5
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
2
LTC2401/LTC2402
ORDER PART NUMBER
Consult factory for Military grade parts.
(Notes 1, 2)
Supply Voltage (V
CC
) to GND.......................–0.3V to 7V
Analog Input Voltage to GND ....... –0.3V to (V
CC
+ 0.3V)
Reference Input Voltage to GND .. –0.3V to (V
CC
+ 0.3V)
Digital Input Voltage to GND........ –0.3V to (V
CC
+ 0.3V)
Digital Output Voltage to GND ..... –0.3V to (V
CC
+ 0.3V)
T
JMAX
= 125°C, θ
JA
= 130°C/W
LTC2401CMS
LTC2401IMS
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
UUW
1
2
3
4
5
V
CC
FS
SET
CH1
CH0
ZS
SET
10
9
8
7
6
F
O
SCK
SDO
CS
GND
TOP VIEW
MS10 PACKAGE
10-LEAD PLASTIC MSOP
Operating Temperature Range
LTC2401/LTC2402C ................................ 0°C to 70°C
LTC2401/LTC2402I ............................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART NUMBER
MS10 PART MARKING
LTC2402CMS
LTC2402IMS
LTMD
LTME
MS10 PART MARKING
LTMB
LTMC
T
JMAX
= 125°C, θ
JA
= 130°C/W
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution ● 24 Bits
No Missing Codes Resolution 0.1V ≤ FS
SET
≤ V
CC
, ZS
SET
= 0V (Note 5) ● 24 Bits
Integral Nonlinearity FS
SET
= 2.5V, ZS
SET
= 0V (Note 6) ● 2 10 ppm of V
REF
FS
SET
= 5V, ZS
SET
= 0V (Note 6) ● 4 15 ppm of V
REF
Offset Error 2.5V ≤ FS
SET
≤ V
CC
, ZS
SET
= 0V ● 0.5 2 ppm of V
REF
Offset Error Drift 2.5V ≤ FS
SET
≤ V
CC
, ZS
SET
= 0V 0.01 ppm of V
REF
/°C
Full-Scale Error 2.5V ≤ FS
SET
≤ V
CC
, ZS
SET
= 0V ● 4 10 ppm of V
REF
Full-Scale Error Drift 2.5V ≤ FS
SET
≤ V
CC
, ZS
SET
= 0V 0.04 ppm of V
REF
/°C
Total Unadjusted Error FS
SET
= 2.5V, ZS
SET
= 0V 5 ppm of V
REF
FS
SET
= 5V, ZS
SET
= 0V 10 ppm of V
REF
Output Noise V
IN
= 0V (Note 13) 3 µV
RMS
Normal Mode Rejection 60Hz ±2% (Note 7) ● 110 130 dB
Normal Mode Rejection 50Hz ±2% (Note 8) ● 110 130 dB
Power Supply Rejection, DC FS
SET
= 2.5V, ZS
SET
= 0V, V
IN
= 0V 100 dB
Power Supply Rejection, 60Hz ±2% FS
SET
= 2.5V, ZS
SET
= 0V, V
IN
= 0V, (Notes 7, 15) 110 dB
Power Supply Rejection, 50Hz ±2% FS
SET
= 2.5V, ZS
SET
= 0V, V
IN
= 0V, (Notes 8, 15) 110 dB
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
REF
= FS
SET
– ZS
SET
. (Notes 3, 4)
CONVERTER CHARACTERISTICS
U
1
2
3
4
5
V
CC
FS
SET
V
IN
NC
ZS
SET
10
9
8
7
6
TOP VIEW
MS10 PACKAGE
10-LEAD PLASTIC MSOP
F
O
SCK
SDO
CS
GND
3
LTC2401/LTC2402
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage 2.7V ≤ V
CC
≤ 5.5V ● 2.5 V
CS, F
O
2.7V ≤ V
CC
≤ 3.3V 2.0 V
V
IL
Low Level Input Voltage 4.5V ≤ V
CC
≤ 5.5V ● 0.8 V
CS, F
O
2.7V ≤ V
CC
≤ 5.5V 0.6 V
V
IH
High Level Input Voltage 2.7V ≤ V
CC
≤ 5.5V (Note 9) ● 2.5 V
SCK 2.7V ≤ V
CC
≤ 3.3V (Note 9) 2.0 V
V
IL
Low Level Input Voltage 4.5V ≤ V
CC
≤ 5.5V (Note 9) ● 0.8 V
SCK 2.7V ≤ V
CC
≤ 5.5V (Note 9) 0.6 V
I
IN
Digital Input Current 0V ≤ V
IN
≤ V
CC
● –10 10 µA
CS, F
O
I
IN
Digital Input Current 0V ≤ V
IN
≤ V
CC
(Note 9) ● –10 10 µA
SCK
C
IN
Digital Input Capacitance 10 pF
CS, F
O
C
IN
Digital Input Capacitance (Note 9) 10 pF
SCK
V
OH
High Level Output Voltage I
O
= –800µA ● V
CC
– 0.5 V
SDO
V
OL
Low Level Output Voltage I
O
= 1.6mA ● 0.4 V
SDO
V
OH
High Level Output Voltage I
O
= –800µA (Note 10) ● V
CC
– 0.5 V
SCK
V
OL
Low Level Output Voltage I
O
= 1.6mA (Note 10) ● 0.4 V
SCK
I
OZ
High-Z Output Leakage ● –10 10 µA
SDO
DIGITAL I PUTS A D DIGITAL OUTPUTS
UU
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply Voltage ● 2.7 5.5 V
I
CC
Supply Current
Conversion Mode CS = 0V (Note 12)
● 200 300 µA
Sleep Mode CS = V
CC
(Note 12) ● 20 30 µA
POWER REQUIRE E TS
WU
The ● denotes specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
The ● denotes specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. (Note 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range (Note 14) ● ZS
SET
– 0.12V
REF
FS
SET
+ 0.12V
REF
V
FS
SET
Full-Scale Set Range ● 0.1 + ZS
SET
V
CC
V
ZS
SET
Zero-Scale Set Range ● 0FS
SET
– 0.1 V
C
S(IN)
Input Sampling Capacitance 10 pF
C
S(REF)
Reference Sampling Capacitance 15 pF
I
IN(LEAK)
Input Leakage Current CS = V
CC
● –10 1 10 nA
I
REF(LEAK)
Reference Leakage Current V
REF
= 2.5V, CS = V
CC
● –12 1 12 nA
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
REF
= FS
SET
– ZS
SET
. (Note 3)
A ALOG I PUT A D REFERE CE
UU
U
U
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LTC2401IMS#TRPBF

Mfr. #:
Buy LTC2401IMS#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 24-Bit Power Delta-Sigma ADC
Lifecycle:
New from this manufacturer.
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