LTC2389-18 Series

18-Bit, 2.5Msps SAR ADC with Pin-Configurable Analog Input Range and 99.8dB SNR

Catalog

18-Bit, 2.5Msps SAR ADC with Pin-Configurable Analog Input Range and 99.8dB SNR

Part	Ratio - S/H:ADC	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Voltage - Supply, Analog	Reference Type	Voltage - Supply, Digital	Architecture	Configuration	Supplier Device Package	Sampling Rate (Per Second)	Number of Inputs	Data Interface	Mounting Type	Number of Bits	Features	Input Type	Number of A/D Converters
Analog Devices LTC2389HLX-16#PBF	1:1	125 °C	-40 °C	48-LQFP	5 V	External Internal	5 V	SAR	S/H-ADC	48-LQFP (7x7)	2.5 M	1	Parallel SPI	Surface Mount	16	Selectable Address	Differential Pseudo-Differential	1
Analog Devices LTC2389IUK-18#TRPBF	1:1	85 °C	-40 °C	48-WFQFN Exposed Pad	5 V	External Internal	5 V	SAR	S/H-ADC	48-QFN (7x7)	2.5 M	1	Parallel SPI	Surface Mount		Selectable Address	Differential Pseudo-Differential	1
Analog Devices LTC2389IUK-18#PBF	1:1	85 °C	-40 °C	48-WFQFN Exposed Pad	5 V	External Internal	5 V	SAR	S/H-ADC	48-QFN (7x7)	2.5 M	1	Parallel SPI	Surface Mount		Selectable Address	Differential Pseudo-Differential	1
Analog Devices LTC2389CUK-18#PBF	1:1	70 °C	0 °C	48-WFQFN Exposed Pad	5 V	External Internal	5 V	SAR	S/H-ADC	48-QFN (7x7)	2.5 M	1	Parallel SPI	Surface Mount		Selectable Address	Differential Pseudo-Differential	1
Analog Devices LTC2389ILX-16#PBF	1:1	85 °C	-40 °C	48-LQFP	5 V	External Internal	5 V	SAR	S/H-ADC	48-LQFP (7x7)	2.5 M	1	Parallel SPI	Surface Mount	16	Selectable Address	Differential Pseudo-Differential	1
Analog Devices LTC2389HLX-18#PBF	1:1	125 °C	-40 °C	48-LQFP	5 V	External Internal	5 V	SAR	S/H-ADC	48-LQFP (7x7)	2.5 M	1	Parallel SPI	Surface Mount		Selectable Address	Differential Pseudo-Differential	1

Catalog

18-Bit, 2.5Msps SAR ADC with Pin-Configurable Analog Input Range and 99.8dB SNR

Key Features

• 2.5Msps Throughput Rate

• ±3LSB INL (Max)

• Guaranteed 18-Bit, No Missing Codes

• Pin-Configurable Analog Input Range:±4.096V Fully Differential0V to 4.096V Pseudo-Differential Unipolar±2.048V Pseudo-Differential Bipolar

• ±4.096V Fully Differential

• 0V to 4.096V Pseudo-Differential Unipolar

• ±2.048V Pseudo-Differential Bipolar

• 99.8dB (Fully Differential)/95.2dB (Pseudo Differential) SNR (Typ) at fIN= 2kHz

• –116dB (Fully Differential)/–112dB (Pseudo Differential) THD (Typ) at fIN= 2kHz

• Guaranteed Operation to 125°C

• Single 5V Supply

• Internal 20ppm/°C (Max) Reference

• Internal Reference Buffer

• 162.5mW Power Dissipation at 2.5Msps

• No Pipeline Delay, No Cycle Latency

• 1.8V to 5V I/O Voltages

• Parallel and Serial I/O Interface

• 48-pin 7mm × 7mm LQFP and QFN Packages

Description

The LTC2389-18 is a low noise, high speed 18-bit successive approximation register (SAR) ADC. Operating from a single 5V supply, the LTC2389-18 supports pin-configurable fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) analog input ranges, allowing it to interface with multiple signal chain formats without requiring additional level translation or signal conditioning. The LTC2389-18 achieves ±3LSB INL (maximum), no missing codes at 18-bits, and 99.8dB (fully differential)/95.2dB (pseudo differential) SNR (typical).The LTC2389-18 includes a precision internal 4.096V reference, with a guaranteed 0.5% initial accuracy and a ±20ppm/°C (maximum) temperature coefficient, as well as an internal reference buffer. Fast 2.5Msps throughput with no cycle latency in the parallel interface modes makes the LTC2389-18 ideally suited for a wide variety of high speed applications. An internal oscillator sets the conversion time, easing external timing considerations. The LTC2389-18 dissipates only 162.5mW at 2.5Msps, while both nap and sleep power-down modes are provided to further reduce power consumption during inactive periods.ApplicationsMedical ImagingHigh Speed, Wide Dynamic Range Data AcquisitionIndustrial Process ControlInstrumentationATE