Linear Technology DC1186A - LTC2308: 12-bit, 8-channel SAR ADC with SPI I/F, (req DC590 for DC, DC890 for AC apps) DC118 DC1186A 数据表
产品代码
DC1186A
LTC2308
1
2308fb
FREQUENCY (kHz)
0
–140
MAGNITUDE (dB)
–120
–100
–80
0
–40
100
150
250
–20
–60
–130
–110
–90
–10
–50
–30
–70
50
200
2308 TA01b
f
SMPL
= 500kHz
SINAD = 73.6dB
THD = –89.5dB
THD = –89.5dB
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Low Noise, 500ksps,
8-Channel, 12-Bit ADC
The LTC
®
2308 is a low noise, 500ksps, 8-channel, 12-bit
ADC with an SPI/MICROWIRE compatible serial interface.
This ADC includes an internal reference and a fully differ-
ential sample-and-hold circuit to reduce common mode
noise. The internal conversion clock allows the external
serial output data clock (SCK) to operate at any frequency
up to 40MHz.
This ADC includes an internal reference and a fully differ-
ential sample-and-hold circuit to reduce common mode
noise. The internal conversion clock allows the external
serial output data clock (SCK) to operate at any frequency
up to 40MHz.
The LTC2308 operates from a single 5V supply and draws
just 3.5mA at a sample rate of 500ksps. The auto-shutdown
feature reduces the supply current to 200μA at a sample
rate of 1ksps.
just 3.5mA at a sample rate of 500ksps. The auto-shutdown
feature reduces the supply current to 200μA at a sample
rate of 1ksps.
The LTC2308 is packaged in a small 24-pin 4mm × 4mm
QFN. The internal 2.5V reference and 8-channel multiplexer
further reduce PCB board space requirements.
QFN. The internal 2.5V reference and 8-channel multiplexer
further reduce PCB board space requirements.
The low power consumption and small size make the
LTC2308 ideal for battery operated and portable appli-
cations, while the 4-wire SPI compatible serial interface
makes this ADC a good match for isolated or remote data
acquisition systems.
LTC2308 ideal for battery operated and portable appli-
cations, while the 4-wire SPI compatible serial interface
makes this ADC a good match for isolated or remote data
acquisition systems.
8192 Point FFT, f
IN
= 1kHz
n
12-Bit Resolution
n
500ksps Sampling Rate
n
Low Noise: SINAD = 73.3dB
n
Guaranteed No Missing Codes
n
Single 5V Supply
n
Auto-Shutdown Scales Supply Current with Sample
Rate
n
Low Power: 17.5mW at 500ksps
0.9mW
Nap
Mode
35μW
Sleep
Mode
n
Internal Reference
n
Internal 8-Channel Multiplexer
n
Internal Conversion Clock
n
SPI/MICROWIRE
TM
Compatible Serial Interface
n
Unipolar or Bipolar Input Ranges (Software Selectable)
n
Separate Output Supply OV
DD
(2.7V to 5.25V)
n
24-Pin 4mm × 4mm QFN Package
n
High Speed Data Acquisition
n
Industrial Process Control
n
Motor Control
n
Accelerometer Measurements
n
Battery Operated Instruments
n
Isolated and/or Remote Data Acquisition
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
SDI
SDO
SCK
CONVST
2308 TA01
SERIAL
PORT
ANALOG
INPUT
MUX
CH0-CH7
ANALOG INPUTS
0V TO 4.096V UNIPOLAR
±2.048V BIPOLAR
REFCOMP
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP
OR SHIFT REGISTER
ASIC, PLD, MPU, DSP
OR SHIFT REGISTER
INTERNAL
2.5V REF
LTC2308
AV
DD
DV
DD
OV
DD
GND
0.1μF
2.7V TO 5.25 V
5V
12-BIT
500ksps
ADC
+
–
2.2μF
0.1μF
0.1μF
10μF
10μF
10μF
0.1μF
V
REF
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
All other trademarks are the property of their respective owners.