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LTC1043 Datasheet

  • LTC1043

  • 2-Channel Differential Input 16-Bit No Latency DS ADC

  • 293.49KB

  • 28頁

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LTC2436-1
2-Channel Differential Input
16-Bit No Latency
鈭單?/div>
ADC
FEATURES
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
2-Channel Differential Input with Automatic
Channel Selection (Ping-Pong)
Low Supply Current: 200碌A(chǔ), 4碌A(chǔ) in Autosleep
Differential Input and Differential Reference with
GND to V
CC
Common Mode Range
0.12LSB INL, No Missing Codes
0.16LSB Full-Scale Error and 0.006LSB Offset
800nV RMS Noise, Independent of V
REF
No Latency: Digital Filter Settles in a Single Cycle and
Each Channel Conversion is Accurate
Internal Oscillator鈥擭o External Components
Required
87dB Min, 50Hz and 60Hz Notch Filter
Narrow SSOP-16 Package
Single Supply 2.7V to 5.5V Operation
Pin Compatible with the 24-Bit LTC2412
The LTC
廬
2436-1 is a 2-channel differential input mi-
cropower 16-bit No Latency
鈭單?/div>
TM
analog-to-digital con-
verter with an integrated oscillator. It provides 0.5LSB
INL and 800nV RMS noise independent of V
REF
. The two
differential channels convert alternately with a channel
identification included in the conversion result. It uses
delta-sigma technology and provides single conversion
settling of the digital filter. Through a single pin, the
LTC2436-1 can be configured for better than 87dB input
differential mode rejection at 50Hz and 60Hz
鹵2%,
or it
can be driven by an external oscillator for a user defined
rejection frequency. The internal oscillator requires no
external frequency setting components.
The converter accepts any external differential reference
voltage from 0.1V to V
CC
for flexible ratiometric and
remote sensing measurement configurations. The full-
scale differential input range is from 鈥?0.5 鈥?V
REF
to 0.5 鈥?/div>
V
REF
. The reference common mode voltage, V
REFCM
, and
the input common mode voltage, V
INCM
, may be indepen-
dently set anywhere between GND and V
CC
. The DC
common mode input rejection is better than 140dB.
The LTC2436-1 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
s
s
s
s
s
s
s
s
Direct Sensor Digitizer
Weight Scales
Direct Temperature Measurement
Gas Analyzers
Strain-Gage Transducers
Instrumentation
Data Acquisition
Industrial Process Control
TYPICAL APPLICATIO
5V REF
1碌F
4.9k
(100mV)
100鈩?/div>
1
2
4
V
CC
EFFECTIVE RESOLUTION (碌V)*
F
O
14
REF
+
CH0
+
LTC2436-1
CH0
鈥?/div>
REF
鈥?/div>
CH1
+
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/SIMULTANEOUS
50Hz/60Hz REJECTION
50
40
30
20
10
0
0
5
4
3
2
V
REF
(V)
24361 TA02
*COMBINES EFFECTS OF PEAK-TO-PEAK NOISE
AND 16-BIT STEP SIZE (V
REF
/2
16
)
1
5
THERMOCOUPLE
3
6
7
8, 9, 10, 15, 16
SCK
SDO
CS
13
12
11
3-WIRE
SPI INTERFACE
CH1
鈥?/div>
GND
24361 TA01
U
Effective Resolution vs V
REF
90
80
70
60
U
U
24361f
1

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