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参数资料
| 型号： | LT2435IGN#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | 1-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件页数： | 1/40页 |
| 文件大小： | 458K |
| 代理商： | LT2435IGN#PBF |
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LTC2435/LTC2435-1
1
24351fb
■ 2
× Speed Up Version of the LTC2430: 15Hz Output
Rate, 60Hz Notch—LTC2435; 13.75Hz Output Rate,
Simultaneous 50Hz/60Hz Notch—LTC2435-1
■ Differential Input and Differential Reference with
GND to VCC Common Mode Range
■ 3ppm INL, No Missing Codes
■ 10ppm Gain Error
■ 0.8ppm Noise
■ Single Conversion Settling Time for Multiplexed
Applications
■ Internal Oscillator—No External Components
Required
■ Single Supply 2.7V to 5.5V Operation
■ Low Supply Current (200
μA,4μA in Auto Sleep)
■ 20-Bit ADC in Narrow SSOP-16 Package
(SO-8 Footprint)
The LTC
2435/2435-1 are 2.7V to 5.5V micropower
20-bit differential
ΔΣ analog to digital converters with
integrated oscillator, 3ppm INL and 0.8ppm RMS noise.
They use delta-sigma technology and provide single cycle
settling time for multiplexed applications. Through a
single pin, the LTC2435 can be configured for better than
110dB input differential mode rejection at 50Hz or 60Hz
±2%, or it can be driven by an external oscillator for a user
defined rejection frequency. The LTC2435-1 can be con-
figured for better than 87dB input differential mode rejec-
tion over the range of 49Hz to 61.2Hz (50Hz and 60Hz
±2% simultaneously). The internal oscillator requires no
external frequency setting components.
The converters accept any external differential reference
voltage from 0.1V to VCC for flexible ratiometric and
remote sensing measurement configurations. The full-
scale differential input range is from – 0.5VREF to 0.5VREF.
The reference common mode voltage, VREFCM, and the
input common mode voltage, VINCM, may be indepen-
dently set anywhere within the GND to VCC range of the
LTC2435/LTC2435-1. The DC common mode input rejec-
tion is better than 120dB.
The LTC2435/LTC2435-1 communicate through a flexible
3-wire digital interface which is compatible with SPI and
MICROWIRE
TM protocols.
20-Bit No Latency
ΔΣTM
ADCs with Differential Input and
Differential Reference
No Latency
ΔΣ is a trademark of Linear Technology Corporation.
Protected by U.S. Patents including 6140950, 6169506.
VCC
FO
REF+
REF–
SCK
IN+
IN–
SDO
GND
CS
214
3
4
13
5
6
12
1, 7, 8, 9, 10, 15, 16
11
REFERENCE
VOLTAGE
0.1V TO VCC
ANALOG INPUT RANGE
–0.5VREF TO 0.5VREF
= INTERNAL OSC/50Hz REJECTION (LTC2435)
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION (LTC2435)
= INTERNAL 50Hz/60Hz REJECTION (LTC2435-1)
3-WIRE
SPI INTERFACE
1
μF
2.7V TO 5.5V
LTC2435/
LTC2435-1
2435 TA01
VCC
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO S
U
APPLICATIO S
U
■
Direct Sensor Digitizer
■ Weight Scales
■ Direct Temperature Measurement
■
Gas Analyzers
■ Strain Gage Transducers
■ Instrumentation
■
Data Acquisition
■ Industrial Process Control
■ 6-Digit DVMs
10
8
6
4
2
0
–2
–4
–6
–8
–10
INPUT VOLTAGE (V)
–2.5
–1.5
–0.5
0.5
1.5
2435 G04
2.5
FO = GND
VCC = 5V
VREF = 5V
VINCM = VINCM = 2.5V
TA = –45°C
TA = 25°C
TA = 85°C
INL
(ppm
OF
V
REF
)
Integral Nonlinearity vs Input
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
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