3 MSPS 12-Bit A/D Converter in TSOT and MSOP Packages

The AD7274 is a 12-bit, high speed, low power, successive-approximation ADC. The part operates from a single 2.35V to 3.6 V power supply and features throughput rates up to 3 MSPS. The part contains a low-noise, wide bandwidth track/hold amplifier which can handle input frequencies in excess of 30 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. The conversion rate is determined by the SCLK. There are no pipeline delays associated with the part.

The AD7274 uses advanced design techniques to achieve very low power dissipation at high throughput rates.

The reference for the part is applied externally and can be in the range of 1.2 V to VDD. This allows the widest dynamic input range to the ADC.

Applications

* Battery-Powered Systems

* Personal Digital Assistants

* Medical Instruments

* Mobile Communications

* Instrumentation and Control Systems

* Data Acquisition Systems

* High-Speed Modems

* Optical Sensors

All Members of the AD727x Family

Part #

Resolution (Bits)

Package Type

Price

AD7274

12

8-LEAD TSOT/MSOP

$6.50

AD7276

12

6-LEAD TSOT/8-LEAD MSOP

$6.25

AD7277

10

6-LEAD TSOT/8-LEAD MSOP

$3.60

AD7273

10

8-LEAD TSOT/MSOP

$3.75

AD7278

8

6-LEAD TSOT/8-LEAD MSOP

$1.85

* Fast Throughput Rate: 3 MSPS

* Specified for VDD of 2.35 V to 3.6 V

* Low Power: 13.5 mW at 3 MSPS with 3 V Supplies

* Wide Input Bandwidth: 70 dB SNR at 1 MHz Input Frequency

* Flexible Power/Serial Clock Speed Management