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Linear Technology Electronic Components Datasheet

LTC2309CF Datasheet

12-Bit SAR ADC

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LTC2309
8-Channel, 12-Bit SAR ADC
with I2C Interface
Features
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 I2C 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
Applications
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
Description
The LTC®2309 is a low noise, low power, 8-channel, 12-bit
successive approximation ADC with an I2C 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
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 ×
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
LTC2309 ideal for battery-operated and portable applica-
tions, while the 2-wire I2C 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.
BLOCK DIAGRAM
5V
0.1µF
10µF
CH0
CH1
CH2
CH3
ANALOG INPUTS
0V TO 4.096V UNIPOLAR CH4
±2.048V BIPOLAR CH5
CH6
CH7
COM
ANALOG
INPUT
MUX
VDD
LTC2309
+
12-BIT
SAR ADC
I2C
PORT
INTERNAL
2.5V REF
AD1
AD0
SCL
SDA
VREF
2.2µF
GND
0.1µF
REFCOMP
10µF
2309 TA01
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
0
Integral Nonlinearity
vs Output Code
1024
2048
3072
OUTPUT CODE
4096
2309 G01
2309fd



Linear Technology Electronic Components Datasheet

LTC2309CF Datasheet

12-Bit SAR ADC

No Preview Available !

LTC2309
Absolute Maximum Ratings (Notes 1, 2)
Supply Voltage
VDD........................................................... –0.3V to 6V
Analog Input Voltage (Note 3)
CH0-CH7, COM, VREF ,
REFCOMP..................... (GND – 0.3V) to (VDD + 0.3V)
Digital Input Voltage
(Note 3)............................ (GND – 0.3V) to (VDD + 0.3V)
Digital Output Voltage...... (GND – 0.3V) to (VDD + 0.3V)
Power Dissipation............................................... 500mW
Operating Temperature Range
LTC2309C................................................ 0°C to 70°C
LTC2309I..............................................–40°C to 85°C
LTC2309H.......................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSSOP............................................................... 300°C
Pin Configuration
TOP VIEW
24 23 22 21 20 19
CH3 1
CH4 2
CH5 3
CH6 4
CH7 5
COM 6
18 GND
17 SDA
16 SCL
25
15 AD1
14 AD0
13 VDD
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm s 4mm) PLASTIC QFN
TJMAX = 150°C, θJA = 37°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
REFCOMP 1
GND 2
VDD 3
AD0 4
AD1 5
SCL 6
SDA 7
GND 8
GND 9
VDD 10
20 VREF
19 COM
18 CH7
17 CH6
16 CH5
15 CH4
14 CH3
13 CH2
12 CH1
11 CH0
F PACKAGE
20-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJA = 90°C/W, θJC = 20°C/W
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2309CUF#PBF
LTC2309CUF#TRPBF
2309
24-Lead (4mm × 4mm) Plastic QFN 0°C to 70°C
LTC2309IUF#PBF
LTC2309IUF#TRPBF
2309
24-Lead (4mm × 4mm) Plastic QFN –40°C to 85°C
LTC2309CF#PBF
LTC2309CF#TRPBF
LTC2309F
20-Lead Plastic TSSOP
0°C to 70°C
LTC2309IF#PBF
LTC2309IF#TRPBF
LTC2309F
20-Lead Plastic TSSOP
–40°C to 85°C
LTC2309HF#PBF
LTC2309HF#TRPBF
LTC2309F
20-Lead Plastic TSSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2309fd



Part Number LTC2309CF
Description 12-Bit SAR ADC
Maker Linear
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LTC2309CF Datasheet PDF






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