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參數資料
| 型號： | LTC2351-14 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Channel, 14-Bit, 1.5Msps Simultaneous Sampling ADC with Shutdown |
| 中文描述： | 通道，14位，1.5Msps的同時采樣ADC，帶有關斷 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 279K |
| 代理商： | LTC2351-14 |
1
LTC2351-14
235114f
6 Channel, 14-Bit, 1.5Msps
Simultaneous Sampling ADC
with Shutdown
DESCRIPTIO
U
The LTC
2351-14 is a 14-bit, 1.5Msps ADC with six
simultaneously sampled differential inputs. The device
draws only 5.5mA from a single 3V supply, and comes in
a tiny 32-pin (5mm
×
5mm) QFN package. A SLEEP
shutdown mode further reduces power consumption to
12
μ
W. The combination of low power and tiny package
makes the LTC2351-14 suitable for portable applications.
The LTC2351-14 contains six separate differential inputs
that are sampled simultaneously on the rising edge of the
CONV signal. These six sampled inputs are then
converted at a rate of 250ksps per channel.
The 83dB common mode rejection allows users to
eliminate ground loops and common mode noise by
measuring signals differentially from the source.
The device converts 0V to 2.5V unipolar inputs differen-
tially, or
±
1.25V bipolar inputs also differentially,
depending on the state of the BIP pin. Any analog input
may swing rail-to-rail as long as the differential input
range is maintained.
The conversion sequence can be abbreviated to convert
fewer than six channels, depending on the logic state of
the SEL2, SEL1 and SEL0 inputs.
The serial interface sends out the six conversion results in
96 clocks for compatibility with standard serial interfaces.
■
1.5Msps ADC with 6 Simultaneously Sampled
Differential Inputs
■
250ksps Throughput per Channel
■
75dB SINAD
■
Low Power Dissipation: 16.5mW
■
3V Single Supply Operation
■
2.5V Internal Bandgap Reference, Can be Overdriven
with External Reference
■
3-Wire SPI-Compatible Serial Interface
■
Internal Conversion Triggered by CONV
■
SLEEP (12
μ
W) Shutdown Mode
■
NAP (4.5mW) Shutdown Mode
■
0V to 2.5V Unipolar, or
±
1.25V Bipolar Differential
Input Range
■
83dB Common Mode Rejection
■
Tiny 32-Pin (5mm
×
5mm) QFN Package
■
Multiphase Power Measurement
■
Multiphase Motor Control
■
Data Acquisition Systems
■
Uninterruptable Power Supplies
APPLICATIOU
FEATURES
BLOCK DIAGRA
W
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6084440, 6522187.
–
+
4
5
25
24
–
+
7
6
9
12
13
16
19
8
CH0
–
CH0
+
CH1
–
CH1
+
10
11
–
+
14
15
CH2
–
CH2
+
CH3
–
CH3
+
–
+
17
18
–
+
20
21
S AND H
S AND H
S AND H
S AND H
S AND H
CH4
–
CH4
+
CH5
–
CH5
+
MUX
V
REF
10
μ
F
BIP
SEL2 SEL1 SEL0
GND
2.5V
REFERENCE
1.5Msps
14-BIT ADC
14-BIT LATCH 5
14-BIT LATCH 4
14-BIT LATCH 3
14-BIT LATCH 2
14-BIT LATCH 1
14-BIT LATCH 0
10
μ
F
3V
V
CC
V
DD
26
29
23
22
33
27
28
2
1
SD0
0.1
μ
F
3
OV
DD
3V
32
SCK
31
DGND
OGND
30
CONV
THREE-
STATE
SERIAL
OUTPUT
PORT
TIMING
LOGIC
235114 TA01
–
+
S AND H
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