Part A
AD9753ASTZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4116 Stückzahl
- Package
- LQFP-48
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9753ASTZ and AD9751ASTRL are both 10-bit high-speed TxDAC digital-to-analog converters from Analog Devices in the same 48-lead LQFP package, sharing core resolution, supply architecture, and interface family. The AD9753ASTZ offers a higher maximum update rate and a wider operating temperature range, while the AD9751ASTRL provides a lower power profile. Both are functionally comparable, but the update-rate and thermal margins should be validated against the target application before substitution.
Resolution and DAC Architecture
High match
Package Type
High match
Maximum Update Rate
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD9751ASTRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5648 Stückzahl
- Package
- LQFP-48
- Series
- Data Acquisition von Digital to Analog Converters (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 | AD9753ASTZ | AD9751ASTRL | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 10 bit | Higher resolution provides finer output quantization and lower quantization noise, directly affecting signal fidelity in the DAC output. |
| Maximum Update Rate | 300 MSPS | 300 MSPS | The maximum clock rate determines the highest achievable output frequency and bandwidth for the DAC. |
| Number of DAC Channels | 1 | 1 | Single-channel configuration defines the device as a single DAC, suitable for I/Q or single-path transmit architectures. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Current output requires an external transformer or op-amp for voltage conversion, affecting the analog front-end design. |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | Supply voltage compatibility ensures the part can be used in the same low-voltage digital and analog rails. |
| Package / Case | 48-LQFP | 48-LQFP | Package footprint and pinout determine board-level drop-in compatibility and thermal layout. |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Industrial temperature range ensures reliable operation across the same environmental conditions. |
| Data Interface | Parallel | Parallel | Parallel input interface affects the digital host connection and required pin count for data transfer. |
| INL / DNL | ±0.5 LSB INL (typ) | ±0.5 LSB INL (typ) | Integral and differential nonlinearity indicate static accuracy and monotonicity of the DAC transfer function. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9753ASTZ | AD9751ASTRL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | - |
| 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) | ±0.5, ±0.4 | - |
| Architecture | Current Source | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the AD9753ASTZ and AD9751ASTRL?
The AD9753ASTZ is a 12-bit, 300 MSPS TxDAC+ digital-to-analog converter, while the AD9751ASTRL is a 10-bit, 300 MSPS TxDAC+ DAC. Both are pin-compatible members of the same Analog Devices TxDAC+ family and share the same 48-lead LQFP package, but they differ in resolution (12-bit vs 10-bit) and therefore in INL/DNL, SNR, and SFDR performance specifications.
Are the AD9753ASTZ and AD9751ASTRL pin-compatible?
Yes. Both devices are offered in the same 48-lead LQFP (ST-48) package with the same pinout, which allows the AD9751ASTRL to be used as a drop-in lower-resolution alternative to the AD9753ASTZ on a common PCB footprint, provided the system performance requirements are met.
What is the maximum update rate of these DACs?
Both the AD9753ASTZ and AD9751ASTRL are specified for a maximum update rate of 300 MSPS, making them suitable for high-speed transmit applications such as wireless base stations, cable modem termination systems, and broadband communications.
What is the resolution difference and how does it affect performance?
The AD9753ASTZ provides 12-bit resolution, whereas the AD9751ASTRL provides 10-bit resolution. The higher resolution of the AD9753ASTZ yields lower quantization noise, better INL/DNL, and higher SNR/SFDR, which is important in wideband or high-dynamic-range transmit signal chains. The AD9751ASTRL offers a lower-cost option where 10-bit resolution is sufficient.
Do both parts support the same digital input interface?
Yes. Both devices use a CMOS-compatible parallel input interface with the same data bus width and timing architecture within the TxDAC+ family, so the digital interface and clocking scheme are consistent between the two parts.
What is the difference between the ASTZ and ASTRL ordering codes?
The "ASTZ" suffix on AD9753ASTZ denotes a 48-lead LQFP package in a lead-free (Pb-free) RoHS-compliant tray format. The "ASTRL" suffix on AD9751ASTRL denotes the same 48-lead LQFP package in lead-free RoHS-compliant tape-and-reel format. The difference is packaging and shipping format, not device function.
Can the AD9751ASTRL directly replace the AD9753ASTZ in an existing design?
Because both parts share the same package, pinout, supply requirements, and 300 MSPS update rate, the AD9751ASTRL can physically replace the AD9753ASTZ. However, the reduction from 12-bit to 10-bit resolution changes INL, DNL, SNR, and SFDR, so the system's dynamic performance budget must be re-validated before substitution.