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LTC2439-1IGN Datasheet

  • LTC2439-1IGN

  • 8-/16-Channel 16-Bit No Latency Delta-Sigma ADC

  • 291.32KB

  • 28頁

  • LINER

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LTC2439-1
8-/16-Channel
16-Bit No Latency
鈭單?/div>
TM
ADC
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
16-Channel Single-Ended or 8-Channel Differential
Inputs
Low Supply Current (200碌A, 4碌A in Autosleep)
Rail-to-Rail Differential Input/Reference
16-Bit No Missing Codes
1
碌
V RMS Noise, 16-ENOBS Independent of V
REF
Very Low Transition Noise: Less Than 0.02LSB
Operates with a Reference as Low as 100mV with
1.5碌V LSB Step Size
Guaranteed Modulator Stability and Lock-Up
Immunity for Any Input and Reference Conditions
Single Supply 2.7V to 5.5V Operation
Internal Oscillator鈥擭o External Components
Required
87dB Min, 50Hz and 60Hz Simultaneous Notch Filter
Pin Compatible with the 24-Bit LTC2418
28-Lead SSOP Package
The LTC
廬
2439-1 is a 16-channel (8-differential)
micropower 16-bit
鈭單?/div>
analog-to-digital converter. It op-
erates from 2.7V to 5.5V and includes an integrated
oscillator, 0.12LSB INL and 1碌V RMS noise. It uses delta-
sigma technology and provides single cycle settling time
for multiplexed applications. Through a single pin, the
LTC2439-1 can be configured for better than 87dB differ-
ential mode rejection at 50Hz and 60Hz
鹵2%,
or it can be
driven by an external oscillator for a user-defined rejec-
tion frequency. The internal oscillator requires no external
frequency setting components.
The LTC2439-1 accepts any external differential reference
voltage from 0.1V to V
CC
for flexible ratiometric and remote
sensing measurement applications. It can be configured
to take 8 differential channels or 16 single-ended channels.
The full-scale bipolar input range is from 鈥?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 between GND and V
CC
. The DC common mode
input rejection is better than 140dB.
The LTC2439-1 communicates through a flexible
4-wire digital interface that 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 Gauge Transducers
Instrumentation
Data Acquisition
Industrial Process Control
TYPICAL APPLICATIO
21 CH0
22 CH1
鈥?/div>
鈥?/div>
鈥?/div>
28 CH7
1 CH8
鈥?/div>
鈥?/div>
鈥?/div>
8 CH15
10 COM
12 REF
鈥?/div>
15
GND
2.7V TO 5.5V
REF
+
V
CC
F
O
MINIMUM RESOLVABLE SIGNAL (碌V)
11
9
19
1碌F
= EXTERNAL OSCILLATOR
= 50Hz and 60Hz REJECTION
THERMOCOUPLE
16-CHANNEL
MUX
+
鈥?/div>
DIFFERENTIAL
16-BIT
鈭單?/div>
ADC
SDI
SCK
SDO
CS
20
18
17
16
4-WIRE
SPI INTERFACE
LTC2439-1
241418 TA01a
U
Minimum Resolvable
Signal vs V
REF
90
80
70
60
50
40
30
20
10
0
5
4
3
V
REF
(V)
24361 TA02
*FOR V
REF
= 0.4V RESOLUTION IS LIMITED BY STEP SIZE
1
2
0
U
U
24391f
1

LTC2439-1IGN 產(chǎn)品屬性

  • LTC2439-1

  • 49

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 模數(shù)轉換器

  • -

  • 16

  • 6.8

  • MICROWIRE?，串行，SPI?

  • 1

  • 1mW

  • 單電源

  • -40°C ~ 85°C

  • 表面貼裝

  • 28-SSOP（0.154"，3.90mm 寬）

  • 28-SSOP

  • 管件

  • 16 個單端，雙極；8 個差分，雙極

  • DC790A-ND - BOARD DELTA SIGMA ADC LTC2439-1

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