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参数资料
| 型号： | DC746A |
| 厂商： | Linear Technology |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2412 |
| 软件下载： | QuikEval System |
| 设计资源： | DC746A Design File DC746A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval™ |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 7.5 |
| 数据接口： | MICROWIRE?，串行，SPI? |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2412 |
| 已供物品： | 板 |
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LTC2412
1
2412f
The LTC
2412 is a 2-channel differential input micropower
24-bit No Latency
ΣTM analog-to-digital converter with
an integrated oscillator. It provides 2ppm INL and 0.16ppm
RMS noise over the entire supply range. The two differen-
tial channels are converted alternately with channel ID
included in the conversion results. It uses delta-sigma
technology and provides single conversion settling of the
digital filter. Through a single pin, the LTC2412 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 internal oscillator requires no external frequency
setting components.
The converter accepts 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. The DC
common mode input rejection is better than 140dB.
The LTC2412 communicates through a flexible 3-wire
digital interface which is compatible with SPI and
MICROWIRE
TM protocols.
s
Direct Sensor Digitizer
s
Weight Scales
s
Direct Temperature Measurement
s
Gas Analyzers
s
Strain-Gage Transducers
s
Instrumentation
s
Data Acquisition
s
Industrial Process Control
s
6-Digit DVMs
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
2-Channel Differential Input with Automatic
Channel Selection (Ping-Pong)
s
Low Supply Current: 200
A, 4A in Autosleep
s
Differential Input and Differential Reference with
GND to VCC Common Mode Range
s
2ppm INL, No Missing Codes
s
2.5ppm Full-Scale Error and 0.1ppm Offset
s
0.16ppm Noise, 22.5 Effective Number of Bits
s
No Latency: Digital Filter Settles in a Single Cycle and
Each Channel Conversion is Accurate
s
Internal Oscillator—No External Components
Required
s
110dB Min, 50Hz or 60Hz Notch Filter
s
Narrow SSOP-16 Package
s
Single Supply 2.7V to 5.5V Operation
2-Channel Differential Input
24-Bit No Latency
Σ ADC
No Latency
Σ is a trademark of Linear Technology Corporation.
MICROWIRE is a trademark of National Semiconductor Corporation.
VCC
REF+
FO
CH0+
CH0–
SCK
REF–
CH1+
SDO
GND
CS
114
4
13
3
5
THERMOCOUPLE
6
CH1–
7
12
8, 9, 10, 15, 16
11
2412 TA01
2
= INTERNAL OSC/50Hz REJECTION
= EXTERNAL CLOCK SOURCE
= INTERNAL OSC/60Hz REJECTION
3-WIRE
SPI INTERFACE
1
F
2.7V TO 5.5V
LTC2412
VCC
VIN (V)
–1.5
TUE
(ppm
OF
V
REF
)
–0.5
0.5
1.5
–1.0
0
1.0
–1.5
–0.5
0.5
1.5
2412 TA02
2.5
–2
–2.5
–1
0
1
2
TA = 90°C
TA = –45°C
TA = 25°C
VCC = 5V
REF+ = 5V
REF– = GND
VREF = 5V
VINCM = 2.5V
FO = GND
Total Unadjusted Error vs Input
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
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