AD7298 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor

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 Ideally suited to monitoring system variables in a variety of systems including telecommunications, process and industrial control. High Throughput rate of 1Msps per channel 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. Integrated temperature sensor with 0.25°C resolution.

The AD7298 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
  • Ideally suited to monitoring system variables in a variety of systems including telecommunications, process and industrial control.
  • High Throughput rate of 1Msps per channel 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.
  • Integrated temperature sensor with 0.25°C resolution.
Features and Benefits
  • 12 bit SAR ADC
    8 single-ended inputs
    Channel sequencer functionality
    Fast throughput of 1Msps
    Analog Input Range 0 to 2.5V
  • 12-bit temperature-to-digital converter
  • Temperature sensor accuracy of ±1°C
  • Temperature range: −40°C to +125°C
  • Specified for VDD of 2.8 V to 3.6V
  • Logic Voltage VDRIVE = 1.65V to 3.6V
  • Power-down current : <10 μA
  • Internal 2.5V Reference
  • Internal Power on Reset
  • High speed serial interface SPI
  • 20-lead LFCSP
Analog to Digital Converters
IBIS Models
Software & Systems Requirements
Data Sheets
Documentnote
AD7298: 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor Data Sheet (Rev. B)PDF 1382 kB
Application Notes
Documentnote
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. B)PDF 401 kB
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)PDF 299 kB
User Guides
Documentnote
UG-254: Evaluation Board for the AD7298 8-Channel, 1 MSPS, 12-Bit SAR ADC with Temperature SensorPDF 759 kB
Technical Books
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7298BCPZ Production20 ld LFCSP 4x4mm (2.6EP)OTH 490-40 to 125C4.593.9Y
AD7298BCPZ-RL7 Production20 ld LFCSP 4x4mm (2.6EP)REEL 1500-40 to 125C03.9Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7298SDZEvaluation Board59Y
EVAL-SDP-CB1ZEvaluation Board99Y
Reference Materials
AD7298:8通道、1 MSPS、12位SAR ADC,内置温度传感器 (Rev. B) ad7298
AD7298: 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor Data Sheet (Rev. B) ad7298
AD7298 IBIS Models ad7298
AD7298 评估软件 ad7298
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. B) ad7476
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0) ad7476
AN-931: 了解PulSAR ADC支持电路 (Rev. 0) ad7476
UG-254: Evaluation Board for the AD7298 8-Channel, 1 MSPS, 12-Bit SAR ADC with Temperature Sensor ad7298
Integrated SAR ADC Family in 4mm x 4mm Package ad7298
MT-031: 实现数据转换器的接地并解开AGND和DGND的谜团 ad6672
MT-002: 奈奎斯特准则对数据采样系统设计有何意义 ad6672
SAR ADC & Driver Quick-Match Guide ad7476
Analog-to-Digital Converter and Drivers ICs Solutions Bulletin, Volume 10,... ad7986
MS-2210:高速ADC的电源设计 ad9861
MS-1779:九项常被忽略的ADC技术规格 ad6672