AD7450 Differential Input, 1 MSPS, 12-BIT SAR ADC

The AD7450 is a 12-bit, high speed, low power, successive-approximation (SAR) analog-to-digital converter featuring a fully differential analog input. It operates from a single 3 V or 5 V power supply and features throughput rates up to 833 kSPS or 1 MSPS respectively.

This part contains a low-noise, wide bandwidth, differential track and hold amplifier (T/H) which can handle input frequencies in excess of 1 MHz with the –3 dB point being 20 MHz typically. The reference voltage for the AD7450 is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.

The conversion process and data acquisition are controlled using CS and the serial clock allowing the device to interface with Microprocessors or DSPs. The input signals are sampled on the falling edge of CS and the conversion is also initiated at this point. The SAR architecture of this part ensures that there are no pipeline delays.

The AD7450 uses advanced design techniques to achieve very low power dissipation at high throughput rates.

Features and Benefits
  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 3 V and 5 V
  • Low Power at max Throughput Rate:
    - 3.75 mW max at 833 kSPS with 3 V Supplies
    - 9 mW max at 1MSPS with 5 V Supplies
  • Fully Differential Analog Input
  • Flexible Power/Serial Clock Speed Management
  • Variable Reference Input
  • Wide Input Bandwidth: 70dB SINAD at 300kHz Input Frequency
  • No Pipeline Delays
  • High Speed Serial Interface
    - SPI®/QSPI™/MicroWire™/DSP
    Compatible
  • Powerdown Mode: 1µA max
  • Analog to Digital Converters
    Data Sheets
    Documentnote
    AD7450: Differential Input, 1 MSPS 12-Bit ADC in µSOIC-8 and SO-8 Data Sheet (Rev. A)PDF 368 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD7450ARMZ Production8 ld MSOPOTH 50-40 to 85C5.654.74Y
    AD7450ARMZ-REEL7 Production8 ld MSOPREEL 1000-40 to 85C04.74Y
    AD7450ARZ Production8 ld SOICOTH 98-40 to 85C5.654.74Y
    AD7450ARZ-REEL7 Production8 ld SOICREEL 1000-40 to 85C04.74Y
    AD7450BRMZ Production8 ld MSOPOTH 50-40 to 85C6.45.37Y
    AD7450BRZ Production8 ld SOICOTH 98-40 to 85C6.45.37Y
    Reference Materials
    AD7450: Differential Input, 1 MSPS 12-Bit ADC in µSOIC-8 and SO-8 Data Sheet (Rev. A) ad7450
    AD7450参考代码 ad7450
    MS-2210:高速ADC的电源设计 ad9861