Features • True Differential Inputs • Guaranteed performance from 50ksps to 200ksps • External Reference • High AC Common-Mode Rejection • SPI™/QSPI™/MICROWIRE™/DSP compatible Serial Interface Description The ADC121S625 is a 12-bit, 50 ksps to 200 ksps sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. While best performance is achieved with reference voltage between 500mV and 2.5V, the reference voltage can be varied from 100mV to 2.5V, with a corresponding resolution between 49µV and 1.22mV. The output serial data is binary 2's complement, and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and with many common DSP serial interfaces. The differential input, low power, automatic power down, and small size make the ADC121S625 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications. Operating from a single +5V supply, the normal power consumption is reduced to a few nanowatts in the power-down mode. The ADC121S625 is a pin-compatible superior replacement for the ADS7817 and is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of -40°C to +85°C and clock rates of 800 kHz to 3.2 MHz. Key Specification Conversion Rate 50 to 200 ksps Offset Error 0.4 LSB (typ) Gain Error 0.05 LSB (typ) INL ± 1 LSB (max) DNL ± 0.75 LSB (max) CMRR 82 dB (typ) Power Consumption   Active, 200ksps 2.25 mW (typ) Active, 50ksps 1.33 mW (typ) Power Down 60 nW (typ) Applications • Automotive Navigation • Portable Systems • Medical Instruments • Instrumentation and Control Systems • Motor Control • Direct Sensor Interface

ADC121S625 Webench® Custom Design/Analyze/Build It ADC Parameters ADC and Op Amp Supply voltage: 5 V help Sample Rate Sample Rate per channel ksps help Operating Conditions Min. Ambient Temperature degC help Nominal Ambient Temperature degC help Max. Ambient Temperature degC help Also Recommended ADC121S021▲ Single Ended Input, Smaller Package ADC121S655▲ 200 To 500Ksps Pin Compatible Alternative ADC121S705▲ 500Ksps To 1Msps 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

Datasheet

Title		Size	Date	Other Language
	ADC121S625 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter	1049 Kbytes	3-Jun-05	日本語

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

Title	Size	Date
Evaluation Boards & Development Systems

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC121S625CIMM	CMOS7	0	18406	0	0	1089000	4	309006723
ADC121S625CIMMX	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.

For more information on Reliability Metrics, please click here.