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LTC2400CS8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40
1
LTC2400
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
24-Bit µPower
No Latency ∆Σ
TM
ADC in SO-8
■
Weight Scales
■
Direct Temperature Measurement
■
Gas Analyzers
■
Strain-Gage Transducers
■
Instrumentation
■
Data Acquisition
■
Industrial Process Control
■
6-Digit DVMs
Total Unadjusted Error vs Output Code
■
24-Bit ADC in SO-8 Package
■
4ppm INL, No Missing Codes
■
4ppm Full-Scale Error
■
Single Conversion Settling Time
for Multiplexed Applications
■
0.5ppm Offset
■
0.3ppm Noise
■
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
The LTC
®
2400 is a 2.7V to 5.5V micropower 24-bit
converter with an integrated oscillator, 4ppm INL and
0.3ppm RMS noise. It uses delta-sigma technology and
provides single cycle settling time for multiplexed appli-
cations. Through a single pin the LTC2400 can be config-
ured for better than 110dB rejection at 50Hz or 60Hz ±2%,
or it 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 frequency
setting components.
The converter accepts any external reference voltage from
0.1V to V
CC
. With its extended input conversion range of
–12.5% V
REF
to 112.5% V
REF
, the LTC2400 smoothly
resolves the offset and overrange problems of preceding
sensors or signal conditioning circuits.
The LTC2400 communicates through a flexible 3-wire
digital interface which is compatible with SPI and
MICROWIRE
TM
protocols.
V
CC
F
O
V
REF
SCK
V
IN
SDO
GND CS
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUT RANGE
–0.12V
REF
TO 1.12V
REF
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
3-WIRE
SPI INTERFACE
1µF
2.7V TO 5.5V
LTC2400
2400 TA01
V
CC
OUTPUT CODE (DECIMAL)
0 8,338,608 16,777,215
LINEARITY ERROR (ppm)
2400 TA02
10
8
6
4
2
0
–2
–4
–6
–8
–10
V
CC
= 5V
V
REF
= 5V
T
A
= 25°C
F
O
= LOW
, LTC and LT are registered trademarks of Linear Technology Corporation.
No Latency ∆Σ is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
2
LTC2400
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range (Note 14) ● –0.125 • V
REF
1.125 • V
REF
V
V
REF
Reference Voltage Range ● 0.1 V
CC
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
● –10 1 10 nA
ORDER PART NUMBER
Consult factory for Military grade parts.
S8 PART MARKING
(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)
Operating Temperature Range
LTC2400C ............................................... 0°C to 70°C
LTC2400I............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
T
JMAX
= 125°C, θ
JA
= 130°C/W
LTC2400CS8
LTC2400IS8
2400
2400I
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) 0.1V ≤ V
REF
≤ V
CC
, (Note 5) ● 24 Bits
Integral Nonlinearity V
REF
= 2.5V (Note 6) ● 2 10 ppm of V
REF
V
REF
= 5V (Note 6) ● 4 15 ppm of V
REF
Offset Error 2.5V ≤ V
REF
≤ V
CC
● 0.5 2 ppm of V
REF
Offset Error Drift 2.5V ≤ V
REF
≤ V
CC
0.01 ppm of V
REF
/°C
Full-Scale Error 2.5V ≤ V
REF
≤ V
CC
● 4 10 ppm of V
REF
Full-Scale Error Drift 2.5V ≤ V
REF
≤ V
CC
0.02 ppm of V
REF
/°C
Total Unadjusted Error V
REF
= 2.5V 5 ppm of V
REF
V
REF
= 5V 10 ppm of V
REF
Output Noise V
IN
= 0V (Note 13) 1.5 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 V
REF
= 2.5V, V
IN
= 0V 100 dB
Power Supply Rejection, 60Hz ±2% V
REF
= 2.5V, V
IN
= 0V, (Notes 7, 15) 110 dB
Power Supply Rejection, 50Hz ±2% V
REF
= 2.5V, 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. (Notes 3, 4)
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
UUW
CONVERTER CHARACTERISTICS
U
A ALOG I PUT A D REFERE CE
UU
U
U
1
2
3
4
8
7
6
5
TOP VIEW
F
O
SCK
SDO
CS
V
CC
V
REF
V
IN
GND
S8 PACKAGE
8-LEAD PLASTIC SO
3
LTC2400
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
– 0.5V V
SDO
V
OL
Low Level Output Voltage I
O
= 1.6mA ● 0.4V V
SDO
V
OH
High Level Output Voltage I
O
= –800µA (Note 10) ● V
CC
– 0.5V V
SCK
V
OL
Low Level Output Voltage I
O
= 1.6mA (Note 10) ● 0.4V V
SCK
I
OZ
High-Z Output Leakage ● –10 10 µA
SDO
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
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
The ● denotes specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. (Note 3)
DIGITAL I PUTS A D DIGITAL OUTPUTS
UU
POWER REQUIRE E TS
WU
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LTC2400CS8#PBF

Mfr. #:
Buy LTC2400CS8#PBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 24-B Pwr No Lat Delta-Sigma ADC in SO-
Lifecycle:
New from this manufacturer.
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