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| 型号： | DC1444A-B |
| 厂商： | Linear Technology |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | BOARD SAR ADC LTC2305 |
| 软件下载： | QuikEval System |
| 设计资源： | DC1444A Design File DC1444A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval™ |
| ADC 的数量： | 2 |
| 位数： | 12 |
| 采样率（每秒）： | 14k |
| 数据接口： | I²C，串行 |
| 在以下条件下的电源（标准）： | 1.5mW @ 1kSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | LTC2305 |
| 已供物品： | 板 |
| 相关产品： | LTC2305IMS#TRPBF-ND - IC ADC 12-BIT 2CHN 12-MSOP LTC2305IDE#TRPBF-ND - IC ADC 12-BIT 2CHN 12-DFN LTC2305IDE#PBF-ND - IC ADC 12-BIT 2CHN 12-DFN LTC2305HMS#TRPBF-ND - IC ADC 12-BIT 2CHN 12-MSOP LTC2305HMS#PBF-ND - IC ADC 12-BIT 2CHN 12-MSOP LTC2305CMS#TRPBF-ND - IC ADC 12-BIT 2CHN 12-MSOP LTC2305CMS#PBF-ND - IC ADC 12-BIT 2CHN 12-MSOP LTC2305CDE#TRPBF-ND - IC ADC 12-BIT 2CHN 12-DFN LTC2305CDE#PBF-ND - IC ADC 12-BIT 2CHN 12-DFN LTC2305IMS#PBF-ND - IC ADC 12BIT I2C 12-MSOP |
LTC2301/LTC2305
1
23015fb
BLOCK DIAGRAM
FEATURES
APPLICATIONS
DESCRIPTION
1-/2-Channel, 12-Bit ADCs
with I2C Compatible Interface
The LTC2301/LTC2305 are low noise, low power,
1-/2-channel, 12-bit successive approximation ADCs
with an I2C compatible serial interface. These ADCs include
an internal reference and a fully differential sample-and-
hold circuit to reduce common mode noise. The LTC2301/
LTC2305 operate from an internal clock to achieve a fast
1.3μs conversion time.
The LTC2301/LTC2305 operate from a single 5V supply
and draw just 300μA at a throughput rate of 1ksps. The
ADC enters nap mode when not converting, reducing the
power dissipation.
The LTC2301/LTC2305 are available in small 12-pin
4mm × 3mm DFN and 12-pin MSOP packages. The in-
ternal 2.5V reference further reduces PCB board space
requirements.
The low power consumption and small size make the
LTC2301/LTC2305 ideal for battery operated and portable
applications, while the 2-wire I2C compatible serial interface
makes these ADCs a good match for space-constrained
systems.
12-Bit I2C ADC Family
Input Channels
1
2
8
Part Number
LTC2301
LTC2305
LTC2309
Integral Nonlinearity vs Output Code (LTC2305)
n 12-Bit Resolution
n Low Power: 1.5mW at 1ksps, 35μW Sleep Mode
n 14ksps Throughput Rate
n Internal Reference
n Low Noise: SNR = 73.5dB
n Guaranteed No Missing Codes
n Single 5V Supply
n 2-wire I2C Compatible Serial Interface with 9
Addresses Plus One Global for Synchronization
n Fast Conversion Time: 1.3μs
n 1-Channel (LTC2301) and 2-Channel (LTC2305)
Versions
n Unipolar or Bipolar Input Ranges (Software
Selectable)
n Internal Conversion Clock
n Guaranteed Operation from –40°C to 125°C
(MSOP Package)
n 12-Pin 4mm × 3mm DFN and 12-Pin MSOP
Packages
n Industrial Process Control
n Motor Control
n Accelerometer Measurements
n Battery Operated Instruments
n Isolated and/or Remote Data Acquisition
n Power Supply Monitoring
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
23015 TA01a
+
–
12-BIT
SAR ADC
ANALOG
INPUT
MUX
ANALOG INPUT
0V TO 4.096V UNIPOLAR
±2.048V BIPOLAR
I2C
PORT
INTERNAL
2.5V REF
0.1μF
10μF
2.2μF
VREF
REFCOMP
SCL
SDA
AD1
AD0
CH0(IN+)
CH1(IN+)
PIN NAMES IN PARENTHESES
REFER TO LTC2301
10μF
0.1μF
VDD
LTC2301
LTC2305
GND
5V
OUTPUT CODE
0
INL
(LSB)
1.00
0.75
0.25
–0.25
–0.75
0.50
0.00
–0.50
–1.00
2048
1024
3072
23015 TA01b
4096
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