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ADC122S021CIMMX Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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ADC122S021CIMMX Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 19 page  ADC122S021 2 Channel, 200 KSPS 12-Bit A/D Converter General Description The ADC122S021 is a low-power, two-channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface. Unlike the conventional practice of specifying performance at a single sample rate only, the ADC122S021 is fully speci- fied over a sample rate range of 50 kSPS to 200 kSPS. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit. It can be configured to accept one or two input signals at inputs IN1 and IN2. The output serial data is straight binary, and is compatible with several standards, such as SPI™, QSPI™, MICROW- IRE, and many common DSP serial interfaces. The ADC122S021 operates with a single supply that can range from +2.7V to +5.25V. Normal power consumption using a +3V or +5V supply is 2.2 mW and 7.9 mW, respec- tively. The power-down feature reduces the power consump- tion to just 0.14 µW using a +3V supply, or 0.32 µW using a +5V supply. The ADC122S021 is packaged in an 8-lead MSOP package. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed. Features n Specified over a range of sample rates. n Two input channels n Variable power management n Single power supply with 2.7V - 5.25V range Key Specifications n DNL +0.4 / −0.2 LSB (typ) n INL ± 0.35 LSB (typ) n SNR 72.0 dB (typ) n Power Consumption — 3V Supply 2.2 mW (typ) — 5V Supply 7.9 mW (typ) Applications n Portable Systems n Remote Data Acquisition n Instrumentation and Control Systems Pin-Compatible Alternatives by Resolution and Speed All devices are fully pin and function compatible. Resolution Specified for Sample Rate Range of: 50 to 200 kSPS 200 to 500 kSPS 500 kSPS to 1 MSPS 12-bit ADC122S021 ADC122S051 ADC122S101 10-bit ADC102S021 ADC102S051 ADC102S101 8-bit ADC082S021 ADC082S051 ADC082S101 Connection Diagram 20124605 Ordering Information Order Code Temperature Range Description Top Mark ADC122S021CIMM −40˚C to +85˚C 8-Lead MSOP Package X18C ADC122S021CIMMX −40˚C to +85˚C 8-Lead MSOP Package, Tape & Reel X18C ADC122S021EVAL Evaluation Board TRI-STATE® is a trademark of National Semiconductor Corporation QSPI™ and SPI™ are trademarks of Motorola, Inc. April 2005 © 2005 National Semiconductor Corporation DS201246 www.national.com |
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