鈭單?/div>
TM
ADC in SO-8
FEATURES
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DESCRIPTIO
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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鈥擭o External Components
Required
110dB Min, 50Hz/60Hz Notch Filter
Reference Input Voltage: 0.1V to V
CC
Live Zero鈥擡xtended Input Range Accommodates
12.5% Overrange and Underrange
Single Supply 2.7V to 5.5V Operation
Low Supply Current (200碌A(chǔ)) and Auto Shutdown
The LTC
廬
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
鹵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
鈥?2.5% 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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
No Latency
鈭單?/div>
is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
APPLICATIO S
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Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain-Gage Transducers
Instrumentation
Data Acquisition
Industrial Process Control
6-Digit DVMs
TYPICAL APPLICATIO
2.7V TO 5.5V
1碌F
V
CC
LTC2400
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG
INPUT RANGE
鈥?.12V
REF
TO 1.12V
REF
V
REF
SCK
F
O
Total Unadjusted Error vs Output Code
10
V
CC
8
LINEARITY ERROR (ppm)
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
6
4
2
0
鈥?
鈥?
鈥?
鈥?
V
IN
GND
SDO
CS
3-WIRE
SPI INTERFACE
2400 TA01
鈥?0
0
8,338,608
OUTPUT CODE (DECIMAL)
16,777,215
2400 TA02
U
V
CC
= 5V
V
REF
= 5V
T
A
= 25擄C
F
O
= LOW
U
U
1
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