AD7452:  Differential Input, 555 kSPS, 12-Bit A/D Converter in 8-Lead SOT-23

The AD7452 is a 12- bit, low power, successive-approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply ...More

AD7452:  Differential Input, 555 kSPS, 12-Bit A/D Converter in 8-Lead SOT-23

Product Description

The AD7452 is a 12- bit, low power, successive-approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply and features throughput rates up to 555 kSPS.

The 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 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 AD7452 uses advanced design techniques to achieve very low power dissipation at high throughput rates.

Features

  • Specified for VDD of 3 V and 5V
  • Low Power at max Throughput Rate:
    - 7.25 mW max at 555 kSPS with 5 V Supplies
    - 3.3 mW max at 555 kSPS with 3 V Supplies
  • Fully Differential Analog Input
  • Wide Input Bandwidth:
    - 70 dB SINAD at 100 kHz Input Frequency
  • Flexible Power/Serial Clock Speed Management
  • No Pipeline Delays
  • High Speed Serial Interface SPI®/QSPI™/MICROWIRE™/DSP Compatible
  • Power-Down Mode: 1 µA max
  • 8 Pin SOT-23 Package

Diagrams

AD7452 Diagram
Functional Block Diagram for AD7452

Specifications

Resolution (Bits) 12bit
T-Put Rate 555kSPS
# Chan 1
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss (max) 7.25mW
Interface Ser,SPI
Ain Range (2Vref) p-p
SNR (dB) n/a
Pkg Type SOT

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