AD7298

8通道， 1MSPS ， 12位SAR ADC ，内置温度传感器 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor

Product Details

The is a 12-bit, high speed, low power, 8-channel, successive approximation ADC with an internal temperature sensor. 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 offers a programmable sequencer, which enables the selection of a pre-programmable 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 AD7298 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 AD7298 includes a high accuracy band gap temperature sensor, which is monitored and digitized by the 12-bit ADC to give a resolution of 0.25°C. The device offers a 4-wire serial interface compatible with SPI and DSP interface standards.

The AD7298 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**

1. Ideally suited to monitoring system variables in a variety of systems including telecommunications, process and industrial control.

2. High Throughput rate of 1Msps per channel with Low Power Consumption.

3. Eight Single-Ended Inputs with a Channel Sequencer. A consecutive sequence of channels can be selected on which the ADC cycles and converts.

4. Integrated temperature sensor with 0.25°C resolution.

### Features and Benefits

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12 bit SAR ADC

8 single-ended inputs

Channel sequencer functionality

Fast throughput of 1Msps

Analog Input Range 0 to 2.5V

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12-bit temperature-to-digital converter

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Temperature sensor accuracy of ±1°C

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Temperature range: −40°C to +125°C

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Specified for VDD of 2.8 V to 3.6V

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Logic Voltage VDRIVE = 1.65V to 3.6V

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Power-down current : <10 μA

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Internal 2.5V Reference

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Internal Power on Reset

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High speed serial interface SPI

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20-lead LFCSP