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參數(shù)資料
| 型號： | LTCVX |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Serial 12-Bit/14-Bit, 3.5Msps Sampling ADCs with Shutdown |
| 中文描述： | 串行12-Bit/14-Bit，3.5Msps采樣ADC，帶有關(guān)斷 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 232K |
| 代理商： | LTCVX |
1
LTC2355-12/LTC2355-14
Serial 12-Bit/14-Bit, 3.5Msps
Sampling ADCs with Shutdown
2355f
APPLICATIU
FEATURES
DESCRIPTIO
U
BLOCK DIAGRA
W
■
3.5Msps Conversion Rate
■
74.2dB SINAD at 14-Bits, 71.1dB SINAD at 12-Bits
■
Low Power Dissipation: 18mW
■
3.3V Single Supply Operation
■
2.5V Internal Bandgap Reference can be Overdriven
■
3-Wire SPI-Compatible Serial Interface
■
Sleep (13
μ
W) Shutdown Mode
■
Nap (4mW) Shutdown Mode
■
80dB Common Mode Rejection
■
0V to 2.5V Unipolar Input Range
■
Tiny 10-Lead MSOP Package
■
Communications
■
Data Acquisition Systems
■
Uninterrupted Power Supplies
■
Multiphase Motor Control
■
Multiplexed Data Acquisition
■
RFID
THD, 2nd, 3rd and SFDR
vs Input Frequency
The LTC
2355-12/LTC2355-14 are 12-bit/14-bit, 3.5Msps
serial ADCs with differential inputs. The devices draw only
5.5mA from a single 3.3V supply and come in a tiny 10-lead
MSOP package. A Sleep shutdown feature further reduces
power consumption to 13
μ
W. The combination of speed,
low
power and tiny package makes the LTC2355-12/
LTC2355-14 suitable for high speed, portable applications.
The 80dB common mode rejection allows users to elimi-
nate ground loops and common mode noise by measuring
signals differentially from the source.
The devices convert 0V to 2.5V unipolar inputs differentially.
The absolute voltage swing for A
IN+
and A
IN–
extends from
ground to the supply voltage.
The serial interface sends out the conversion results during
the 16 clock cycles following a CONV rising edge for
compatibility with standard serial interfaces. If two addi-
tional clock cycles for acquisition time are allowed after the
data stream in between conversions, the full sampling rate
of 3.5Msps can be achieved with a 63MHz clock.
–
+
1
2
7
3
4
S & H
GND
EXPOSED PAD
LTC2355-14
V
REF
10
μ
F
A
IN–
A
IN+
14-BIT ADC
3.3V
10
μ
F
14
1
8
10
9
THREE-
STATE
SERIAL
OUTPUT
PORT
2.5V
REFERENCE
TIMING
LOGIC
V
DD
SDO
CONV
SCK
2355 TA01
5
6
11
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FREQUENCY (MHz)
0.1
–80
T
–74
–68
–62
–56
1
10
100
2355 G02
–86
–92
–98
–104
–110
–50
THD
2nd
3rd
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