[ADS9234RIRHBR] with SPI interface -- 14-bit, 3.5MSPS, dual-channel, synchronous sampling SAR ADC

 Introduction (TI) ADS9234RIRHBR: 14-bit, 3.5MSPS, dual-channel, Synchronous sampling SAR Analog-to-Digital Converter (ADC)

Explanation

The ADS9234RIRHBR is a pin-compatible high-speed dual-channel synchronous sampling analog-to-digital converter (ADC) with an integrated reference voltage and reference voltage buffer. This device can be operated by a single 5V power supply, supports unipolar and fully differential analog input signals, and has excellent DC and AC specifications. The ADS9234RIRHBR features an analog input frequency of up to 1.5MHz and has excellent AC performance, making it suitable for high-bandwidth data acquisition (DAQ) systems.

The ADS9234RIRHBR supports SPI-compatible serial (enhanced SPI) and byte-wide parallel interfaces, making it easy to be used in conjunction with a variety of microcontrollers, digital signal processors (DSPS), and field programmable gate arrays (FPgas). This device also supports the data averaging function, which can enhance the AC performance in high-noise environments.

The ADS9234RIRHBR is available in a space-saving 5mm × 5mm VQFN package. The rated extended temperature range of ADS9234RIRHBR is from -40 °C to +125°C.

Its main features include:

• High resolution and high throughput:

-ADS9224R: 16-bit, 3MSPS, low latency: 333ns

-ADS9234R: 14-bit, 3.5MSPS, low latency: 285ns

Two unipolar, fully differential synchronous sampling channels

• Excellent DC and AC performance:

-ADS9224R:

-16-bit NMC DNL, ±2LSB maximum INL

-94dB SNR, -109dB THD

It is 88dB SINAD at -1 MHZ

-ADS9234R:

- 14-bit NMC DNL, ±1LSB maximum INL

-85.6 dB SNR, -106 dB THD

It is 84dB SINAD at -1 MHZ

• Feature Integration:

- Internal reference and reference buffer

- An internal REFby2 buffer for setting common-mode

-Data averaging

Enhanced SPI interface for MCU and FPGA:

- Wide reading cycle, data can be read with the help of the MCU

- A clock retimer for data transmission through a digital isolator

-DDR mode applicable to FPGA

- Parallel byte mode for convenient connection

• Extended temperature range: -40 °C to +125°C

Application scenarios

The ADS9234RIRHBR is suitable for various applications that require high-precision analog-to-digital conversion, such as:

• Optical encoders: incremental and absolute encoders

Sonar receiver

• Optical fiber network: EDFA gain control loop

• Power quality measurement

Digital power supply

• I/Q modem

• Medical imaging: CT scanner, MRI scanner

Impedance analyzer

Basic parameters

Product: ADS9234RIRHBR

Digit number: 14

Sampling rate (per second) : 3.5M

Input number: 2

Input type: Differential

Data interface: SPI

Configuration: ADC

Ratio -S /H:ADC: 0:1

Number of A/D converters: 2

Architecture: SAR

Reference types: External, Internal

Voltage - Power supply, simulation: 4.5V to 5.5V

Voltage - Power supply, digital: 1.65V to 5.5V

Feature: Synchronous sampling

Operating temperature: -40°C to 125°C

Package/Shell: 32-VFQFN

Act now to get the exclusive quote for ADS9234RIRHBR!

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