LTC1277 Series

12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown

Catalog

12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown

Part	Package / Case [custom]	Package / Case	Package / Case [custom]	Data Interface	Operating Temperature [Max]	Operating Temperature [Min]	Number of Inputs	Input Type	Supplier Device Package	Sampling Rate (Per Second)	Reference Type	Number of Bits	Mounting Type	Ratio - S/H:ADC	Architecture	Voltage - Supply, Analog	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Configuration	Number of A/D Converters
Analog Devices LTC1277ISW#PBF	7.5 mm	24-SOIC	0.295 in	Parallel	85 °C	-40 °C	1	Differential Single Ended	24-SOIC	100k	External Internal	12 bits	Surface Mount	1:1	SAR	5 V	-2.45 V	5.25 V	5.25 V	2.7 V	S/H-ADC	1
Analog Devices LTC1277CSW#PBF	7.5 mm	24-SOIC	0.295 in	Parallel	70 °C	0 °C	1	Differential Single Ended	24-SOIC	100k	External Internal	12 bits	Surface Mount	1:1	SAR	5 V	-2.45 V	5.25 V	5.25 V	2.7 V	S/H-ADC	1
Analog Devices LTC1277CSW#TRPBF	7.5 mm	24-SOIC	0.295 in	Parallel	70 °C	0 °C	1	Differential Single Ended	24-SOIC	100k	External Internal	12 bits	Surface Mount	1:1	SAR	5 V	-2.45 V	5.25 V	5.25 V	2.7 V	S/H-ADC	1

Catalog

12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown

Key Features

• Low Power Dissipation: 10mW

• Sample Rate: 100ksps

• Samples Inputs Beyond Nyquist, 72dB S/(N + D) and 82dB THD at fIN= 100kHz

• Single Supply 5V or ±5V Operation

• Power Shutdown to 1µA in Sleep Mode

• 180µA Nap Mode (LTC1277) with Instant Wake-Up

• Internal Reference Can Be Overdriven

• Internal Synchronized Clock

• 0V to 4.096V or ±2.048V Input Ranges (1mV/LSB)

• 24-Lead SOL Package

Description

The LTC1274/LTC1277 are 8µs sampling 12-bit A/D converters which draw only 2mA (typ) from single 5V or ±5V supplies. These easy-to-use devices come complete with a 2µs sample-and-hold, a precision reference and an internally trimmed clock. Unipolar and bipolar conversion modes add to the flexibility of the ADCs.Two power-down modes are available in the LTC1277. In Napmode, the LTC1277 draws only 180µA and the instant wake-up from Nap mode allows the LTC1277 to be powered down even during brief inactive periods. In Sleep mode only 1µA will be drawn. A REFRDY signal is used to show the ADC is ready to sample after waking up from Sleep mode. The LTC1274 also provides the Sleep mode and REFRDY signal.The A/D converters convert 0V to 4.096V unipolar inputs from a single 5V supply or ±2.048V bipolar inputs from ±5V supplies.The LTC1274 has a single-ended input and a 12-bit parallel data format. The LTC1277 offers a differential input and a 2-byte read format. The bipolar mode is formatted as 2’s complement for the LTC1274 and offset binary for the LTC1277.ApplicationsBattery-Powered Portable SystemsHigh Speed Data Acquisition for PCsDigital Signal ProcessingMultiplexed Data Acquisition SystemsAudio and Telecom ProcessingSpectrum Analysis