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AD7298-1 8-Channel, 1 MSPS, 10-Bit SAR ADC

The AD7298-1 offers a programmable sequencer, which enables the selection of a preprogrammable sequence of channels for conversion. The device has an on-chip, 2.5 V reference that can be disabled to allow the use of an external reference. The device offers a 4-wire serial interface compatible with SPI and DSP interface standards. The AD7298-1 uses advanced design techniques to achieve very low power dissipation at high throughput rates. The part also offers flexible power/throughput rate management options. The part is offered in a 20-lead LFCSP package. PRODUCT HIGHLIGHTS Ideally Suited to Monitoring System Variables in a Variety of Systems. This includes telecommunications, and process and industrial control. High Throughput Rate of 1 MSPS with Low Power Consumption. Eight Single-Ended Inputs with a Channel Sequencer. A consecutive sequence of channels can be selected on which the ADC cycles and converts.

The AD7298-1 is a 10-bit, high speed, low power, 8-channel, successive approximation ADC. The part operates from a single 3.3 V power supply and features throughput rates up to 1 MSPS. The device contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 30 MHz.

The AD7298-1 offers a programmable sequencer, which enables the selection of a preprogrammable sequence of channels for conversion. The device has an on-chip, 2.5 V reference that can be disabled to allow the use of an external reference.

The device offers a 4-wire serial interface compatible with SPI and DSP interface standards.

The AD7298-1 uses advanced design techniques to achieve very low power dissipation at high throughput rates. The part also offers flexible power/throughput rate management options. The part is offered in a 20-lead LFCSP package.

PRODUCT HIGHLIGHTS

• Ideally Suited to Monitoring System Variables in a Variety of Systems. This includes telecommunications, and process and industrial control.
• High Throughput Rate of 1 MSPS with Low Power Consumption.
• Eight Single-Ended Inputs with a Channel Sequencer. A consecutive sequence of channels can be selected on which the ADC cycles and converts.

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Reference Materials

• Tutorials：MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design
• Tutorials：Integrated SAR ADC Family in 4mm x 4mm Package
• Tutorials：MT-031: Grounding Data Converters and Solving the Mystery of "AGND" and "DGND"
• Technical Articles：MS-2210: Designing Power Supplies for High Speed ADC
• Technical Articles：MS-1779: Nine Often Overlooked ADC Specifications