参数资料
型号: LTC1865AIMS
元件分类: ADC
英文描述: Analog to Digital Converter
中文描述: 模数转换器
文件页数: 1/20页
文件大小: 278K
代理商: LTC1865AIMS
1
LTC1864/LTC1865
18645f
APPLICATIO S
U
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
Power, 16-Bit, 250ksps
1- and 2-Channel ADCs in MSOP
Single 5V Supply, 250ksps, 16-Bit Sampling ADC
Supply Current vs Sampling Frequency
The LTC
1864/LTC1865 are 16-bit A/D converters that are
offered in MSOP and SO-8 packages and operate on a
single 5V supply. At 250ksps, the supply current is only
850
A. The supply current drops at lower speeds because
the LTC1864/LTC1865 automatically power down
between conversions. These 16-bit switched capacitor
successive approximation ADCs include sample-and-holds.
The LTC1864 has a differential analog input with an
adjustable reference pin. The LTC1865 offers a software-
selectable 2-channel MUX and an adjustable reference pin
on the MSOP version.
The 3-wire, serial I/O, small MSOP or SO-8 package and
extremely high sample rate-to-power ratio make these
ADCs ideal choices for compact, low power, high speed
systems.
These ADCs can be used in ratiometric applications or
with external references. The high impedance analog
inputs and the ability to operate with reduced spans down
to 1V full scale, allow direct connection to signal sources
in many applications, eliminating the need for external
gain stages.
s
16-Bit 250ksps ADCs in MSOP Package
s
Single 5V Supply
s
Low Supply Current: 850
A (Typ)
s
Auto Shutdown Reduces Supply Current
to 2
A at 1ksps
s
True Differential Inputs
s
1-Channel (LTC1864) or 2-Channel (LTC1865)
Versions
s
SPI/MICROWIRE
TM Compatible Serial I/O
s
16-Bit Upgrade to 12-Bit LTC1286/LTC1298
s
Pin Compatible with 12-Bit LTC1860/LTC1861
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
High Speed Data Acquisition
s
Portable or Compact Instrumentation
s
Low Power Battery-Operated Instrumentation
s
Isolated and/or Remote Data Acquisition
1
2
3
4
8
7
6
5
VREF
IN+
IN
GND
VCC
SCK
SDO
CONV
LTC1864
1864 TA01
ANALOG INPUT
0V TO 5V
5V
1
F
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTERS
SAMPLING FREQUENCY (kHz)
0.01
SUPPLY
CURRENT
(
A)
1000
100
10
1
0.1
0.01
100
1864 TA02
0.1
1
10
1000
MICROWIRE is a trademark of National Semiconductor Corporation.
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