LTC2309 Series

8-Channel, 12-Bit SAR ADC with I2C Interface

Catalog

8-Channel, 12-Bit SAR ADC with I2C Interface

Part	Configuration	Reference Type	Sampling Rate (Per Second)	Supplier Device Package	Number of Inputs	Number of Bits	Architecture	Mounting Type	Input Type	Features	Voltage - Supply, Digital	Number of A/D Converters	Voltage - Supply, Analog	Ratio - S/H:ADC	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case [y]	Package / Case	Package / Case [x]	Data Interface
Analog Devices LTC2309IF#PBF	MUX-S/H-ADC	External Internal	14k	20-TSSOP	8	12 bits	SAR	Surface Mount	Differential Single Ended	Selectable Address	5 V	1	5 V	1:1	85 °C	-40 °C	4.4 mm	20-TSSOP	0.173 in	I2C
Analog Devices LTC2309CUF#TRPBF	MUX-S/H-ADC	External Internal	14k	24-QFN (4x4)	8	12 bits	SAR	Surface Mount	Differential Single Ended	Selectable Address	5 V	1	5 V	1:1	70 °C	0 °C		24-WFQFN Exposed Pad		I2C
Analog Devices LTC2309IUF#TRPBF	MUX-S/H-ADC	External Internal	14k	24-QFN (4x4)	8	12 bits	SAR	Surface Mount	Differential Single Ended	Selectable Address	5 V	1	5 V	1:1	85 °C	-40 °C		24-WFQFN Exposed Pad		I2C
Analog Devices LTC2309CF#PBF	MUX-S/H-ADC	External Internal	14k	20-TSSOP	8	12 bits	SAR	Surface Mount	Differential Single Ended	Selectable Address	5 V	1	5 V	1:1	70 °C	0 °C	4.4 mm	20-TSSOP	0.173 in	I2C

Catalog

8-Channel, 12-Bit SAR ADC with I2C Interface

Key Features

• 12-Bit Resolution

• Low Power: 1.5mW at 1ksps, 35μW Sleep Mode

• 14ksps Throughput Rate

• Low Noise: SNR = 73.4dB

• Guaranteed No Missing Codes

• Single 5V Supply

• 2-Wire I2C Compatible Serial Interface with Nine Addresses Plus One Global for Synchronization

• Fast Conversion Time: 1.3μs

• Internal Reference

• Internal 8-Channel Multiplexer

• Internal Conversion Clock

• Unipolar or Bipolar Input Ranges (Software Selectable)

• Guaranteed Operation from –40°C to 125°C (TSSOP Package)

• 24-Pin 4mm × 4mm QFN and 20-Pin TSSOP Packages

Description

The LTC2309 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 applications, while the 2-wire I2C compatible serial interface makes this ADC a good match for space-constrained systems.ApplicationsIndustrial Process ControlMotor ControlAccelerometer MeasurementsBattery-Operated InstrumentsIsolated and/or Remote Data AcquisitionPower Supply Monitoring