Part A
AD9751ASTZ
ADI公司
- Lifecycle
- Active
- Stock
- 3339 件
- Package
- LQFP-48
- Series
- 資料獲取-數模轉換器（DAC）
Replacement verdict
Compatible functional replacement candidate
The AD9751ASTZ and AD9751ASTRL are functionally equivalent, sharing the same 10-bit 300 MSPS TxDAC core, 48-lead LQFP package, and industrial temperature range; the only distinction is the tape-and-reel packaging of the AD9751ASTRL versus the tray format of the AD9751ASTZ, making them interchangeable for design and production use.
Resolution and Sample Rate
High match
Package Type
High match
Operating Temperature Range
High match
Packaging Format
Validation required
Parts at a glance
Part B
AD9751ASTRL
ADI公司
- Lifecycle
- Active
- Stock
- 5648 件
- Package
- LQFP-48
- Series
- 資料獲取-數模轉換器（DAC）
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9751ASTZ | AD9751ASTRL | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 10 bit | Determines the quantization accuracy of the DAC output; identical resolution means equivalent signal fidelity. |
| Number of DAC Channels | 1 | 1 | Defines how many independent analog outputs are available; both are single-channel, so they are functionally interchangeable. |
| Sampling Rate (Max) | 300 MSPS | 300 MSPS | Sets the maximum update rate of the DAC; matching rates ensure equivalent bandwidth capability in the target design. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Determines the interface to downstream analog circuitry; identical output type allows direct substitution without redesign. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Must match the system power rail; identical ranges confirm the parts are drop-in compatible for power design. |
| Package / Case | 48-LQFP | 48-LQFP | Footprint and pinout compatibility are essential for physical substitutability on the same PCB. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must match the board process; both being surface mount ensures the same manufacturing flow. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Confirms both parts meet the same environmental requirements for the intended application. |
| Packaging / Ordering Format | Tray | Tape & Reel | Affects handling and automated assembly; the reel version suits high-volume pick-and-place lines while the tray suits low-volume or prototyping. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9751ASTZ | AD9751ASTRL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Obsolete |
| Number of Bits | 10 | - |
| Number of D/A Converters | 1 | - |
| Settling Time | 11ns (Typ) | - |
| Output Type | Current - Unbuffered | - |
| Differential Output | Yes | - |
| Data Interface | Parallel | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 3V ~ 3.6V | - |
| Voltage - Supply, Digital | 3V ~ 3.6V | - |
| INL / DNL(LSB) | ±0.3, ±0.2 | - |
| Architecture | Current Source | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What is the difference between AD9751ASTZ and AD9751ASTRL?
Both are the same AD9751 10-bit, 300 MSPS high-speed DAC from Analog Devices in a 48-lead LQFP package. The difference is packaging format: AD9751ASTZ is the standard tray packaging, while AD9751ASTRL is the tape-and-reel version (suffix "RL") intended for automated pick-and-place assembly. The silicon die, electrical specifications, and temperature range are identical.
Are AD9751ASTZ and AD9751ASTRL electrically and functionally interchangeable?
Yes. Both part numbers refer to the same AD9751 device with identical resolution (10-bit), update rate (up to 300 MSPS), supply voltage (3.0 V to 3.6 V), and 48-lead LQFP pinout. They differ only in shipping media (tray vs. tape-and-reel), so they are interchangeable in the target design.
What are the key performance specifications of the AD9751?
The AD9751 is a 10-bit current-output DAC with a maximum update rate of 300 MSPS, operating from a 3.0 V to 3.6 V supply. It features an on-chip 1.2 V reference, a spurious-free dynamic range (SFDR) of approximately 68 dBc at 100 MSPS with a 40 MHz output, and a typical power dissipation of about 155 mW. It includes a 32-bit serial interface for configuration and is specified over the industrial temperature range of -40°C to +85°C.
Which package do AD9751ASTZ and AD9751ASTRL use, and is it RoHS compliant?
Both variants are supplied in a 48-lead LQFP (low-profile quad flat package). The "Z" suffix in AD9751ASTZ and AD9751ASTRL denotes the RoHS-compliant, lead-free (Pb-free) package option per Analog Devices' part numbering convention.
When should I choose the tape-and-reel version AD9751ASTRL over AD9751ASTZ?
Choose AD9751ASTRL when your production line uses automated surface-mount pick-and-place equipment that requires tape-and-reel feeding. Choose AD9751ASTZ (tray) for prototyping, low-volume hand assembly, or when your assembly process is set up for tray-fed components. Both contain the identical device.
What is the maximum update rate and resolution of the AD9751?
The AD9751 provides 10-bit resolution with a maximum update rate of 300 MSPS, making it suitable for high-speed applications such as digital synthesis, communications, and instrumentation. This specification applies equally to AD9751ASTZ and AD9751ASTRL.
What supply voltage and power consumption does the AD9751 require?
The AD9751 operates from a single 3.0 V to 3.6 V supply (nominally 3.3 V) and typically dissipates about 155 mW. It also provides a power-down mode to reduce consumption when the DAC is not active. These parameters are identical for AD9751ASTZ and AD9751ASTRL.