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參數(shù)資料
| 型號： | LTWV |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 24-Bit No Latency ADC with Differential Input and Reference in MSOP |
| 中文描述： | 24位不具有差動輸入和ADC的參考延遲，采用MSOP |
| 文件頁數(shù)： | 1/40頁 |
| 文件大?。?/td> | 503K |
| 代理商： | LTWV |
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LTC2411/LTC2411-1
24-Bit No Latency
Σ
TM
ADC
with Differential Input and
Reference in MSOP
DESCRIPTIOU
1
The LTC
2411/LTC2411-1 are 2.7V to 5.5V micropower
24-bit differential
Σ
analog-to-digital converters with an
integrated oscillator, 2ppm INL and 0.29ppm RMS noise.
They use delta-sigma technology and provide single cycle
settling time for multiplexed applications. Through a
single pin, the LTC2411 can be configured for better than
110dB differential mode rejection at 50Hz or 60Hz
±
2%,
and the LTC2411-1 can provide better than 87dB input
differential mode rejection over the range of 49Hz to
61.2Hz, or they can be driven by an external oscillator for
a user-defined rejection frequency. The LTC2411 and
LTC2411-1 are identical when driven by an external
oscillator. The internal oscillator requires no external
frequency setting components.
The converters accept 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 –0.5V
REF
to 0.5V
REF
.
The reference common mode voltage, V
REFCM
, and the
input common mode voltage, V
INCM
, may be indepen-
dently set anywhere within the GND to V
CC
range of the
LTC2411/LTC2411-1. The DC common mode input rejec-
tion is better than 140dB.
The LTC2411/LTC2411-1 communicate through a flexible
3-wire digital interface that is compatible with SPI and
MICROWIRE
TM
protocols.
, 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.
I
Direct Sensor Digitizer
I
Weight Scales
I
Direct Temperature Measurement
I
Gas Analyzers
I
Strain Gauge Transducers
I
Instrumentation
I
Data Acquisition
I
Industrial Process Control
I
6-Digit DVMs
I
24-Bit ADC in an MS10 Package
I
Low Supply Current (200
μ
A in Conversion Mode
and 4
μ
A in Autosleep Mode)
I
Differential Input and Differential Reference
with GND to V
CC
Common Mode Range
I
2ppm INL, No Missing Codes
I
4ppm Full-Scale Error and 1ppm Offset
I
0.29ppm Noise
I
No Latency: Digital Filter Settles in a Single Cycle.
Each Conversion Is Accurate, Even After an
Input Step
I
Single Supply 2.7V to 5.5V Operation
I
Internal Oscillator—No External Components
Required
I
110dB Min, Pin Selectable 50Hz/60Hz Notch Filter
(LTC2411)
I
Simultaneous 50Hz/60Hz Rejection (LTC2411-1)
FEATURES
APPLICATIU
TYPICAL APPLICATIO
2.7V TO 5.5V
U
V
CC
F
O
REF
+
REF
–
SCK
IN
+
IN
–
GND
SDO
CS
1
10
2
3
9
4
5
6
8
7
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG INPUT RANGE
–0.5V
REF
TO 0.5V
REF
= INTERNAL OSC/50Hz REJECTION (LTC2411)
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION (LTC2411)
= SIMULTANEOUS 50Hz/60Hz REJECTION (LTC2411-1)
3-WIRE
SPI INTERFACE
1
μ
F
LTC2411/
LTC2411-1
2411 TA01
V
CC
LTC2411/
LTC2411-1
IN
+
IN
–
REF
+
V
CC
REF
–
V
CC
GND
F
O
1
μ
F
SCK
3-WIRE
SPI
INTERFACE
SDO
2411 TA02
CS
9
2
1
6
10
4
5
3
8
7
BRIDGE
IMPEDANCE
100
TO 10k
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