ADI’s ad9253 is a four channel 14 bit 125msps analog-to-digital converter (ADC) integrated with sample and hold circuit. It has the characteristics of low power consumption, small size and easy to use. The operating voltage is 1.8V, the power of each channel is 110MW at 125msps rate, SNR = 74 dB, SFDR = 90 DBC, DNL= ± 75 LSB, full power analog bandwidth 650MHz, conversion output resolution, mainly used in ultrasonic imager, high speed sampling, general and multi-function radio receiver and test equipment. This paper introduces the ad9253 product highlights and main features, function positioning and ad9253ce01a evaluation board main features, circuit diagram and material list.

The ad9253 is a four channel, 14 bit, 80 MSPs / 105 MSPs / 125 MSPs analog-to-digital converter (ADC) with on-chip sample and hold circuit, designed to achieve low-cost, low-power, small size and low-cost design. Easy to use. The product runs at a conversion rate of up to 125 MSPs and is optimized for critical applications in small package sizes for excellent dynamic performance and low power consumption.

The ADC requires 1.8 V single power supply and LVPECL – / CMOS – full performance operation / LVDS compatible sample rate clock. In many applications, no external references or driver components are required.

ADC automatically multiplies the sample rate clock by the appropriate LVDS serial data rate. A data clock output (DCO) for capturing data on the output and a frame clock output (FCO) for signaling new output bytes are provided. Single channel power down is supported. When all channels are disabled, the power consumption is usually less than 2 MW. ADC includes several functions designed to maximize flexibility and minimize system cost, such as programmable output clock and data alignment, and digital test pattern generation. Available digital test modes include built-in deterministic and pseudo-random modes, as well as custom user-defined test modes input through the serial port interface (SPI).

The ad9253 is packaged in 48 lead lfcsp conforming to ROHS standard. The rated temperature range is − 40 ℃ to + 85 ℃ industrial temperature range. This product is protected by American patent.

Ad9253 product highlights:

Small footprint. Four ADCs are packaged in a small, space saving package.

Low power of 110 MW / channel at 125 MSPs with scalable power options.

Compatible with 12 bit four channel ADC ad9633 pin.

Easy to use. Data clock output (DCO) frequency up to 500 MHz, and support double data rate (DDR) operation.

User flexibility. SPI control provides a wide range of flexibility to meet specific system requirements.

Main features of ad9253

1.8 V power supply

Low power: 110 MW per channel at 125 MSPs with scalable Power Options

SNR = 74 dB (to Nyquist)

SFDR = 90 DBC (to Nyquist)

DNL = ± 75 LSB (typical value); INL = ± 2.0 LSB (typical value)

Serial LVDS (ansi-644 by default) and low power, low signal options (similar to IEEE 1596.3)

650 MHz full power analog bandwidth

2 V input voltage range

Serial port control

Full chip and single channel power down mode

Flexible bit orientation

Build in and custom digital test pattern generation

Multichip synchronization and clock divider

Programmable output clock and data alignment

Programmable output resolution

standby mode

Ad9253 application:

Medical ultrasound

High speed imaging

Orthogonal radio receiver

Diversity radio receiver

Test equipment

Performance characteristics and application analysis of four channel 14 bit 125msps ADC ad9253

Figure 1. Ad9253 function

Prompt ad9253ce01a evaluation board

Ad9253ce01a is an evaluation board for ad9253-125 and ad9633-125, four channel 14 bit and 12 bit ADCs. The reference design provides all the supporting circuits needed to operate the device in various modes and configurations. It is designed to interface directly with hsc-adc-evalc data capture card to allow users to download captured data for analysis. Visual analog software package is used for hardware interface with devices, allowing users to download captured data for analysis using user-friendly graphical interface. The SPI controller software package is also compatible with this hardware and allows users to access the SPI programmable functions of ad9253 and ad9633. User guide ug-328 provides documentation and instructions for configuring devices for performance evaluation in the laboratory( Wiki website)

The ad9253 and ad9633 data books provide additional information about device configuration and performance, which should be consulted when using these tools. All documents and visual analog and SPI controllers are available on the high speed ADC evaluation board page.

Figure 2. Outline drawing of ad9253ce01a evaluation board

Main features of ad9253ce01a evaluation board:

AD9253 / AD9633

Full function evaluation board of SPI interface for setting and controlling

External, on-board oscillator or ad9517 clock option

Balun / transformer or amplifier input driver option

On board LDO regulators require a single external 6 V, 2 a DC supply

VisualAnalog ® And SPI controller software interface

Figure 3. Circuit diagram of ad9253ce01a evaluation board (1)

Figure 4. Circuit diagram of ad9253ce01a evaluation board (2)

Figure 5. Circuit diagram of ad9253ce01a evaluation board (3)

Figure 6. Circuit diagram of ad9253ce01a evaluation board (4)

Figure 7. Circuit diagram of ad9253ce01a evaluation board (5)

Figure 8. Circuit diagram of ad9253ce01a evaluation board (6)

Figure 9. Circuit diagram of ad9253ce01a evaluation board (7)

Figure 10. Circuit diagram of ad9253ce01a evaluation board (8)

Figure 11. Circuit diagram of ad9253ce01a evaluation board (9)

Figure 12. Circuit diagram of ad9253ce01a evaluation board (10)

Editor in charge: GT

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