Part A
AD9761ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7536 PCS
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9761ARSZ and AD9764ARRL are both dual-channel 14-bit current-output DACs from Analog Devices, sharing a common functional architecture and similar digital interface, making the AD9764ARRL a viable functional replacement candidate for the AD9761ARSZ. However, the two parts differ in package footprint, maximum update rate, and supply voltage range, so designers must validate board layout, timing margin, and power rail compatibility before substituting one for the other in an existing design.
Resolution and Channel Count
High match
Package Type
Validation required
Maximum Update Rate
Validation required
Supply Voltage Range
Validation required
Parts at a glance
Part B
AD9764ARRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3748 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - 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 | AD9761ARSZ | AD9764ARRL | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 14 bit | Resolution determines the number of discrete output levels; a 14-bit DAC provides 16x finer quantization than a 10-bit DAC, directly affecting signal fidelity and dynamic range. |
| Number of DAC Channels | 2 | 1 | Channel count determines whether the device can drive dual (I/Q) signal paths; a dual DAC suits quadrature transmit architectures, while a single DAC suits single-channel paths. |
| Update Rate (Max) | 40 MSPS | 125 MSPS | Maximum update rate sets the highest sample clock the DAC can accept, which bounds the achievable output bandwidth and suitability for high-speed signal synthesis. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output topology determines the external interface circuitry required; both are current-output DACs needing an external op-amp or transformer to convert to a voltage or drive a load. |
| Supply Voltage | 3.0 V to 5.5 V | 2.7 V to 5.5 V | Supply range affects compatibility with the system rail; a wider low-voltage range allows operation from lower rails, impacting power and level-shifting requirements. |
| Package / Mounting | 28-SSOP | 28-SSOP | Package and footprint determine board layout compatibility; matching packages allow a drop-in layout change, while differing pinouts require redesign. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Temperature range indicates environmental robustness; identical industrial ranges mean both suit the same operating environments. |
| Data Interface | Parallel | Parallel | Interface type determines the digital host connection; both use a parallel bus, so the FPGA/controller interface style is compatible. |
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 | AD9761ARSZ | AD9764ARRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC+® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 10 | 14 |
| Number of D/A Converters | - | 1 |
| Settling Time | 35ns (Typ) | 35ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| INL / DNL(LSB) | - | ±2.5, ±1.5 |
| Architecture | Current Source | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Base Product Number | AD9761 | - |
| Number of D / A Converters | 2 | - |
| INL / DNL (LSB) | ±0.7, ±0.5 | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD9761ARSZ and AD9764ARRL?
The AD9761ARSZ is a dual-channel 10-bit 40 MSPS TxDAC+ with integrated 2x interpolation filters and on-chip voltage reference, housed in a 28-lead SSOP. The AD9764ARRL is a single-channel 14-bit 125 MSPS TxDAC+ in a 28-lead SOIC (tape and reel packaging). They differ in resolution (10-bit vs 14-bit), channel count (dual vs single), maximum update rate (40 MSPS vs 125 MSPS), and package type.
Are the AD9761ARSZ and AD9764ARRL pin-compatible?
No. The AD9761ARSZ uses a 28-lead SSOP package while the AD9764ARRL uses a 28-lead SOIC package. The pinouts and functions differ because the AD9761 integrates dual DAC channels with interpolation filters, whereas the AD9764 is a single-channel DAC. They are not direct drop-in replacements.
What is the maximum update rate of each device?
The AD9761ARSZ supports a maximum update rate of 40 MSPS per channel. The AD9764ARRL supports a maximum update rate of 125 MSPS. The higher throughput of the AD9764 makes it suitable for higher-bandwidth single-channel applications.
What resolution does each DAC provide?
The AD9761ARSZ provides 10-bit resolution on each of its two DAC channels. The AD9764ARRL provides 14-bit resolution on its single DAC channel, offering finer quantization and lower quantization noise for demanding single-channel signal synthesis.
Do both parts include on-chip interpolation filters?
No. The AD9761ARSZ integrates 2x interpolation filters on each channel, which simplifies reconstruction filtering and reduces the required input data rate. The AD9764ARRL does not include on-chip interpolation filters; it is a straight single-channel DAC that converts input data at the full update rate.
What are the typical applications for each device?
The AD9761ARSZ is typically used in dual-channel transmit paths such as base station quadrature modulation, where its dual DACs and 2x interpolation simplify the signal chain. The AD9764ARRL is used in high-speed single-channel applications such as direct digital synthesis, instrumentation, and communications transmitters requiring 14-bit resolution at up to 125 MSPS.
Can the AD9761ARSZ be used as a substitute for the AD9764ARRL in an existing design?
No, not directly. Substitution would require redesign because the devices differ in resolution (10-bit vs 14-bit), channel count (dual vs single), maximum update rate (40 MSPS vs 125 MSPS), interpolation (integrated vs none), and package footprint (SSOP vs SOIC). Any replacement must be validated against the manufacturer datasheets and the target design requirements.