AD9764 Replacement: GX14S125N Pin-to-Pin Hardware and Software Compatible DAC
GX14S125N is developed as a direct alternative to AD9764 for communication transmit paths and high-speed signal-generation systems. Its compatible pinout, TSSOP-28 package and parallel CMOS interface allow existing 3.3 V AD9764 designs to retain their original PCB and digital control architecture.
The device uses a segmented current-source architecture and integrates an edge-triggered input latch, a 1.25 V temperature-compensated reference and a control amplifier. Its full-scale output current can be adjusted from 2 mA to 20 mA.
GX14S125N as a Direct AD9764 Replacement
GX14S125N is a single-channel, 14-bit current-output DAC supporting update rates of up to 125 MSPS.
For AD9764 systems operating from a 3.3 V supply, GX14S125N provides a direct migration option while retaining the original TSSOP-28 footprint, parallel data bus and output architecture. It is also suitable for new communication and instrumentation designs.
Pin-to-Pin Hardware and Software Compatibility with AD9764
GX14S125N is designed for pin-to-pin hardware compatibility with the TSSOP-28 version of AD9764. Existing PCB footprints, 14-bit parallel CMOS connections, clock signals and differential current-output circuits can be retained in compatible 3.3 V designs.
The device does not require register programming. Existing FPGA, DSP or processor data-output logic and clock-control software can therefore continue to be used without rewriting the digital interface.
AD9764 designs using a 5 V supply should review the power circuit before replacement because GX14S125N operates from 3.0 V to 3.6 V.
GX14S125N vs AD9764: Key Specification Comparison
|
Specification |
AD9764 |
GX14S125N |
|
Resolution |
14-bit |
14-bit |
|
Channels |
1 |
1 |
|
Maximum Update Rate |
125 MSPS |
125 MSPS |
|
DAC Architecture |
Segmented Current Source |
Segmented Current Source |
|
Digital Input Interface |
Parallel CMOS |
Parallel CMOS |
|
Output Configuration |
Single-Ended / Differential |
Single-Ended / Differential |
|
Full-Scale Output Current |
2–20 mA |
2–20 mA |
|
Output Adjustment Range |
20 dB |
20 dB |
|
Supply Voltage |
2.7–5.5 V |
3.0–3.6 V |
|
Internal Reference |
1.20 V |
1.25 V |
|
External Reference Support |
Yes |
Yes |
|
Edge-Triggered Input Latch |
Yes |
Yes |
|
Register Programming |
Not Required |
Not Required |
|
Package |
TSSOP-28 / SOIC-28 |
TSSOP-28 |
|
TSSOP-28 Pin-to-Pin Compatible |
— |
Yes |
|
Direct Replacement in 3.3 V Designs |
— |
Yes |
|
Direct Replacement in 5 V Designs |
— |
Power Review Required |
|
Digital Interface Modification Required |
— |
No |
|
Software Modification Required |
— |
No |
Current-Output DAC Performance and Applications
Key GX14S125N features include:
l 14-bit resolution
l Up to 125 MSPS update rate
l 3.0 V to 3.6 V operation
l 14-bit parallel CMOS input interface
l Segmented current-source architecture
l Differential current outputs supporting single-ended and differential circuits
l Adjustable 2 mA to 20 mA full-scale output current
l Integrated 1.25 V temperature-compensated reference
l External reference support
l More than 10:1 current adjustment range
l TSSOP-28 package
GX14S125N is suitable for communication transmit paths, base stations, fiber-optic gyroscope control systems, waveform generation and instrumentation.
Supply and Technical Support
GXSC can provide samples, pin compatibility verification and technical support for AD9764 replacement projects, including supply-voltage and output-current configuration evaluation.
Request GX14S125N Datasheet and Samples
Contact GXSC to request the GX14S125N datasheet, samples, quotation or technical support for your AD9764 replacement or new DAC design.
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