Features • True Differential Inputs • Guaranteed performance from 500 kSPS to 1 MSPS • External Reference • Wide Input Common-Mode Voltage Range • SPI™/QSPI™/MICROWIRE™/DSP compatible Serial Interface Description The ADC121S705 is a 12-bit, 500 kSPS to 1 MSPS sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. The reference voltage can be varied from 1.0V to VA, with a corresponding resolution between 244µV and VA divided by 4096. The output serial data is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many common DSP serial interfaces. The differential input, low power consumption, and small size make the ADC121S705 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications. Operating from a single 5V supply, the supply current when operating at 1 MSPS is typically 2.3 mA. The supply current drops down to 0.3 µA typically when the ADC121S705 enters power-down mode. The ADC121S705 is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of −40°C to +105°C and clock rates of 8 MHz to 16 MHz. Key Specification Conversion Rate 500 kSPS to 1 MSPS INL ± 0.95 LSB (max) DNL ± 0.95 LSB (max) Offset Error ± 3.0 LSB (max) Gain Error ± 6.5 LSB (max) SINAD 69.5 dB (min) Power Consumption at VA = 5V  Active, 1 MSPS 11.5 mW (typ)  Active, 500 kSPS 9.0 mW (typ)  Power-Down 1.5 µW (typ) Applications • Automotive Navigation • Portable Systems • Medical Instruments • Instrumentation and Control Systems • Motor Control • Direct Sensor Interface

Also Recommended ADC121S101▲ Single Ended Input, Smaller Package ADC121S625▲ 50 To 200Ksps Pin Compatible Alternative ADC121S655▲ 200 To 500Ksps Pin Compatible Alternative MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

	Block Diagram click for larger image
Typical Performance *click for larger image Spectral Response

Datasheet

Title		Size	Date	Other Language
	ADC121S705 12-Bit, 500 kSPS to 1 MSPS, Differential Input, Micro Power A/D Converter	536 Kbytes	12-Mar-07

Featured Application Notes

Title		Size	Date	Other Language
	AN-1261: Application Note 1261 Power Supply Effects on Noise Performance	78 Kbytes	16-Mar-07	中文

More Application Notes

Title		Size	Date	Other Language
	AN-1261: Application Note 1261 Power Supply Effects on Noise Performance	78 Kbytes	16-Mar-07	中文

Design Tools

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Evaluation Boards & Development Systems

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC121S705CIMM	CMOS7	0	18406	0	0	1089000	4	309006723
ADC121S705CIMMX	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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