參數(shù)資料
型號： DC790A
廠商： Linear Technology
文件頁數(shù)： 1/28頁
文件大?。?/td> 0K
描述： BOARD DELTA SIGMA ADC LTC2439-1
軟件下載： QuikEval System
設(shè)計資源： DC790A Design File
DC790A Schematic
標(biāo)準(zhǔn)包裝： 1
系列： QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 6.8
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
工作溫度： 0°C ~ 70°C
已用 IC / 零件： LTC2439-1
已供物品： 板
相關(guān)產(chǎn)品： LTC2439-1CGN#PBF-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1IGN#PBF-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1CGN#TRPBF-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1IGN#TRPBF-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1CGN-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1IGN-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1IGN#TR-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1CGN#TR-ND - IC ADC 16BIT 16CH MCRPWR 28SSOP
LTC2439-1
1
24391fa
8-/16-Channel
16-Bit No Latency
ΣTM ADC
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
The LTC
2439-1 is a 16-channel (8-differential)
micropower 16-bit
Σ analog-to-digital converter. It op-
erates from 2.7V to 5.5V and includes an integrated
oscillator, 0.12LSB INL and 1
VRMSnoise.Itusesdelta-
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
±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 VCC 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 – 0.5VREF to
0.5VREF.Thereferencecommonmodevoltage,VREFCM,and
the input common mode voltage, VINCM, may be indepen-
dently set between GND and VCC. 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.
■ Direct Sensor Digitizer
■ Weight Scales
■ Direct Temperature Measurement
■ Gas Analyzers
■ Strain Gauge Transducers
■ Instrumentation
■ Data Acquisition
■ Industrial Process Control
, LTC and LT are registered trademarks of Linear Technology Corporation.
■ 16-Channel Single-Ended or 8-Channel Differential
Inputs
■ Low Supply Current (200
A, 4A in Autosleep)
■ Rail-to-Rail Differential Input/Reference
■ 16-Bit No Missing Codes
■ 1
V RMS Noise, 16-ENOBS Independent of VREF
■ Very Low Transition Noise: Less Than 0.02LSB
■ Operates with a Reference as Low as 100mV with
1.5
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—No External Components
Required
■ 87dB Min, 50Hz and 60Hz Simultaneous Notch Filter
■ Pin Compatible with the 24-Bit LTC2418
■ 28-Lead SSOP Package
No Latency
Σ is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Minimum Resolvable
Signal vs VREF
SDI
SCK
SDO
CS
FO
REF+
VCC
9
11
2.7V TO 5.5V
20
18
17
16
19
1
F
COM
REF –
GND
10
THERMOCOUPLE
12
15
DIFFERENTIAL
16-BIT
Σ ADC
+
–
241418 TA01a
4-WIRE
SPI INTERFACE
LTC2439-1
= EXTERNAL OSCILLATOR
= 50Hz and 60Hz REJECTION
CH0
CH1
21
22
CH7
CH8
28
1
CH15
8
16-CHANNEL
MUX
VREF (V)
0
*FOR VREF = 0.4V RESOLUTION IS LIMITED BY STEP SIZE
0
MINIMUM
RESOLVABLE
SIGNAL
(
V)
10
30
40
50
2
4
5
90
24361 TA02
20
13
60
70
80
DESCRIPTIO
U
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