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Linear Technology Electronic Components Datasheet

LTC2305 Datasheet

(LTC2301 / LTC2305) 12-Bit ADCs

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LTC2301/LTC2305
1-/2-Channel, 12-Bit ADCs
with I2C Compatible Interface
FEATURES
DESCRIPTION
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
www.DataShneetS4Uin.cgolme 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
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
The LTC®2301/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 Famly
Input Channels
1
Part Number
LTC2301
2
LTC2305
8
LTC2309
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
BLOCK DIAGRAM
5V
10μF
0.1μF
CH0(IN+)
ANALOG INPUT
0V TO 4.096V UNIPOLAR CH1(IN+)
±2.048V BIPOLAR
LTC2301
LTC2305
ANALOG
INPUT
MUX
VDD
+
12-BIT
SAR ADC
I2C
PORT
INTERNAL
2.5V REF
AD1
AD0
SCL
SDA
VREF
2.2μF
PIN NAMES IN PARENTHESES
REFER TO LTC2301
GND
23015 TA01a
0.1μF
Integral Nonlinearity vs Output Code (LTC2305)
1.00
0.75
0.50
0.25
0.00
–0.25
–0.50
–0.75
REFCOMP
10μF
–1.00
0
1024
2048
3072
4096
OUTPUT CODE
23015 TA01b
23015f
1


Linear Technology Electronic Components Datasheet

LTC2305 Datasheet

(LTC2301 / LTC2305) 12-Bit ADCs

No Preview Available !

LTC2301/LTC2305
ABSOLUTE MAXIMUM RATINGS (Notes 1,2)
Supply Voltage (VDD) ................................ –0.3V to 6.0V
Analog Input Voltage
CH0(IN+), CH1(IN), REF,
REFCOMP .....................(GND – 0.3V) to (VDD + 0.3V)
Digital Input Voltage..........(GND – 0.3V) to (VDD + 0.3V)
Digital Output Voltage .......(GND – 0.3V) to (VDD + 0.3V)
Power Dissipation ...............................................500mW
Operating Temperature Range
LTC2301C/LTC2305C ............................... 0°C to 70°C
LTC2301I/LTC2305I.............................. –40°C to 85°C
LTC2301H/LTC2305H (Note 13)......... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
www.DataShPeeIt4NU.cComONFIGURATION
LTC2305
TOP VIEW
GND 1
SDA 2
SCL 3
GND 4
CH0 5
CH1 6
12 AD0
11 AD1
10 VDD
13
9 GND
8 REFCOMP
7 VREF
LTC2305
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
GND 1
SDA 2
SCL 3
GND 4
CH0 5
CH1 6
12 AD0
11 AD1
10 VDD
9 GND
8 REFCOMP
7 VREF
MS PACKAGE
12-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 130°C/W
LTC2301
TOP VIEW
GND 1
SDA 2
SCL 3
GND 4
IN+ 5
IN6
12 AD0
11 AD1
13 10 VDD
9 GND
8 REFCOMP
7 VREF
LTC2301
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
GND 1
SDA 2
SCL 3
GND 4
IN+ 5
IN6
12 AD0
11 AD1
10 VDD
9 GND
8 REFCOMP
7 VREF
MS PACKAGE
12-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 130°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC2301CDE#PBF
LTC2301IDE#PBF
LTC2305CDE#PBF
LTC2305IDE#PBF
LTC2301CMS#PBF
LTC2301IMS#PBF
LTC2301HMS#PBF
LTC2305CMS#PBF
TAPE AND REEL
LTC2301CDE#TRPBF
LTC2301IDE#TRPBF
LTC2305CDE#TRPBF
LTC2305IDE#TRPBF
LTC2301CMS#TRPBF
LTC2301IMS#TRPBF
LTC2301HMS#TRPBF
LTC2305CMS#TRPBF
PART MARKING*
2301
2301
2305
2305
2301
2301
2301
2305
2
PACKAGE DESCRIPTION
12-Lead (3mm × 4mm) Plastic DFN
12-Lead (3mm × 4mm) Plastic DFN
12-Lead (3mm × 4mm) Plastic DFN
12-Lead (3mm × 4mm) Plastic DFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
23015f


Part Number LTC2305
Description (LTC2301 / LTC2305) 12-Bit ADCs
Maker Linear Technology Corporation
Total Page 24 Pages
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