Linear Technology DC1337A - LTC2309: 12-bit, 8-channel SAR ADC with I²C I/F, req DC590 DC1337A DC1337A Ficha De Dados
Códigos do produto
DC1337A
LTC2309
2309fd
BLOCK DIAGRAM
FeAtuRes
AppLICAtIOns
DesCRIptIOn
8-Channel, 12-Bit SAR ADC
with I
2
C Interface
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
Integral Nonlinearity
vs Output Code
n
12-Bit Resolution
n
Low Power: 1.5mW at 1ksps, 35µW Sleep Mode
n
14ksps Throughput Rate
n
Low Noise: SNR = 73.4dB
n
Guaranteed No Missing Codes
n
Single 5V Supply
n
2-Wire I
2
C Compatible Serial Interface with Nine
Addresses Plus One Global for Synchronization
n
Fast Conversion Time: 1.3µs
n
Internal Reference
n
Internal 8-Channel Multiplexer
n
Internal Conversion Clock
n
Unipolar or Bipolar Input Ranges (Software Selectable)
n
Guaranteed Operation from –40°C to 125°C
(TSSOP Package)
n
24-Pin 4mm
× 4mm QFN and 20-Pin TSSOP Packages
The LTC
®
2309 is a low noise, low power, 8-channel, 12-bit
successive approximation ADC with an I
2
C compatible
serial interface. This ADC includes an internal reference
and a fully differential sample-and-hold circuit to reduce
common mode noise. The LTC2309 operates from an
internal clock to achieve a fast 1.3µs conversion time.
The LTC2309 operates from a single 5V supply and
The LTC2309 operates from a single 5V supply and
draws just 300µA at a throughput rate of 1ksps. The
ADC enters nap mode when not converting, reducing
the power dissipation.
The LTC2309 is available in both a small 24-pin 4mm
The LTC2309 is available in both a small 24-pin 4mm
×
4mm QFN and a 20-pin TSSOP package. The internal 2.5V
reference and 8-channel multiplexer further reduce PCB
board space requirements.
The low power consumption and small size make the
The low power consumption and small size make the
LTC2309 ideal for battery-operated and portable applica-
tions, while the 2-wire I
2
C compatible serial interface makes
this ADC a good match for space-constrained systems.
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Easy Drive is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
2309 TA01
I
2
C
PORT
ANALOG
INPUT
MUX
ANALOG INPUTS
0V TO 4.096V UNIPOLAR
±2.048V BIPOLAR
REFCOMP
INTERNAL
2.5V REF
V
DD
5V
GND
LTC2309
0.1
µ
F
12-BIT
SAR ADC
+
–
2.2
µ
F
10
µ
F
0.1
µ
F
10
µ
F
V
REF
SDA
SCL
AD1
AD0
AD0
OUTPUT CODE
0
INL (LSB)
0
0.25
0.50
4096
2309 G01
–0.25
–0.50
–1.00
1024
2048
3072
–0.75
1.00
0.75