ADV7127JRZ240

Digital To Analog Converters Overview

The ADV7127JRZ240 is a high-speed, monolithic CMOS digital-to-analog converter (DAC) designed for video applications. It features a 10-bit resolution and supports throughput rates up to 240 MSPS. The device operates on a single 5 V or 3.3 V supply and includes an internal voltage reference circuit. It provides complementary current outputs capable of driving doubly terminated 75 Ω loads directly. The component utilizes TTL-compatible parallel inputs and is housed in a 24-lead thin shrink small outline package (TSSOP).

Digital To Analog Converters Feature Summary

• 240 MSPS maximum throughput rate with 10-bit resolution.
• RS-343A and RS-170 compatible analog output levels.
• Integrated internal voltage reference circuit.
• Low power standby and power-down modes.

Digital To Analog Converters Applications

• Digital video systems (e.g., 1600 × 1200 at 100 Hz).
• High resolution color graphics displays.
• Video signal reconstruction circuits.
• Direct digital synthesis (DDS) systems.

Digital To Analog Converters Procurement Notes

Verify the specific suffix '240' against the manufacturer's ordering guide to confirm the speed grade and package variant. Ensure the design accounts for the 24-lead TSSOP thermal requirements and PCB layout guidelines for analog ground separation. Confirm that the system clock frequency does not exceed the specified limits for the selected operating temperature range.

Digital To Analog Converters Selection Notes

Select this component when a single-channel, high-speed video DAC is required. The device supports both 5 V and 3.3 V logic interfaces via TTL-compatible inputs. Designers must account for the pipeline delay of one clock cycle between data input and analog output. Ensure the RSET resistor value is calculated correctly to achieve the desired full-scale output current based on the chosen supply voltage.

Digital To Analog Converters Part Context

This part belongs to the ADV7127 series of high-speed video DACs from Analog Devices. The 'JR' designation indicates the industrial temperature range (-40°C to +85°C), while 'RUZ' specifies the 24-lead TSSOP package. The '240' suffix denotes the 240 MHz speed grade capability.

Digital To Analog Converters Replacement Considerations

The ADV7127JRUZ is a direct functional equivalent within the same family. For triple-channel requirements, consider the ADV7123 series. Single-channel alternatives with different pinouts or speeds may require schematic redesign.

Digital To Analog Converters FAQ

What is the typical pipeline delay of the ADV7127?

The ADV7127 has a fixed pipeline delay of 1.0 clock cycle between the rising edge of the clock latching the data and the corresponding analog output transition.

How is the full-scale output current adjusted?

The full-scale output current is determined by connecting a resistor (RSET) between the RSET pin and ground. The relationship is defined as IOUT(mA) = 7968 * VREF(V) / RSET(Ω).

Can the ADV7127 drive a standard 75 Ω monitor directly?

Yes, the differential current outputs can directly drive a doubly terminated 75 Ω coaxial cable, developing RS-343A video levels across the load without additional buffering.