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 AD9760AR50 are both dual-channel 10-bit current-output DACs from Analog Devices in a 28-lead SSOP package, sharing the same resolution, architecture, and supply framework. However, they differ in their maximum update rate and digital input interface, so the AD9761ARSZ can serve as a functional substitute for the AD9760AR50 only after the system timing budget and input drive scheme are validated against the lower throughput and interface requirements.
Resolution and DAC Architecture
High match
Package and Pin Configuration
High match
Maximum Update Rate
Validation required
Digital Input Interface
Validation required
Parts at a glance
Part B
AD9760AR50
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4769 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 | AD9760AR50 | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 10 bit | Both converters offer 10-bit resolution, so quantization noise floor and effective dynamic range are comparable. |
| Number of DAC Channels | 2 (dual) | 1 (single) | A dual-channel device can drive I/Q or two independent outputs, while a single-channel part requires two devices for dual-path designs. |
| Update Rate (Max) | 40 MSPS | 125 MSPS | Maximum update rate determines the highest signal bandwidth and oversampling ratio the DAC can support. |
| Output Type | Current (differential) | Current (differential) | Current-output DACs require an external I/V stage; matching output topology simplifies analog front-end reuse. |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Compatible supply ranges allow the same power rail design to be used for either part. |
| Package | 28-lead SSOP | 28-lead SSOP | Identical package and pin count enable drop-in board layout compatibility. |
| Interface | Parallel CMOS | Parallel CMOS | A matching parallel CMOS interface means the same digital controller and timing can drive either device. |
| On-Chip Reference | Yes | Yes | An integrated reference reduces external component count and simplifies full-scale calibration. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9761ARSZ | AD9760AR50 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | TxDAC+® | TxDAC® |
| Part Status | Active | Obsolete |
| Base Product Number | AD9761 | - |
| Number of Bits | 10 | - |
| Number of D / A Converters | 2 | - |
| Settling Time | 35ns (Typ) | - |
| Output Type | Current - Unbuffered | - |
| Differential Output | Yes | - |
| Data Interface | Parallel | - |
| Reference Type | External, Internal | - |
| Voltage - Supply, Analog | 3V ~ 5.5V | - |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | - |
| INL / DNL (LSB) | ±0.7, ±0.5 | - |
| Architecture | Current Source | - |
| Operating Temperature | -40°C ~ 85°C | - |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD9761ARSZ and the AD9760AR50?
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 AD9760AR50 is a single-channel 10-bit 50 MSPS TxDAC+ in a 28-lead SOIC package. The AD9761ARSZ provides two synchronized DAC channels with digital interpolation, while the AD9760AR50 provides one channel at a higher maximum update rate.
Are the AD9761ARSZ and AD9760AR50 pin-compatible?
No. The AD9761ARSZ uses a 28-lead SSOP package and the AD9760AR50 uses a 28-lead SOIC package, so the package footprints and PCB land patterns differ. In addition, the AD9761ARSZ integrates dual DAC channels and interpolation filters, whereas the AD9760AR50 is a single-channel DAC, so the pin functions are not equivalent.
What is the maximum update rate of each device?
The AD9761ARSZ is specified for a maximum update rate of 40 MSPS per channel. The AD9760AR50 is specified for a maximum update rate of 50 MSPS. Designs requiring the higher single-channel throughput should use the AD9760AR50, while dual-channel synchronized operation is provided by the AD9761ARSZ.
Do both parts include on-chip interpolation filters?
No. The AD9761ARSZ includes integrated 2x interpolation filters on each of its two channels, which simplifies the digital interface by allowing input data at half the DAC update rate. The AD9760AR50 does not include interpolation filters and accepts data directly at the DAC update rate.
What is the resolution and DAC architecture of these devices?
Both the AD9761ARSZ and the AD9760AR50 are 10-bit TxDAC+ current-output digital-to-analog converters. Each provides 10-bit resolution with a segmented current-source architecture intended for communications and signal synthesis applications.
What digital input interface do these DACs use?
Both devices use a parallel digital input interface for their 10-bit data words. The AD9761ARSZ accepts dual-channel input data with the interpolation filters handling the 2x upsampling, while the AD9760AR50 accepts a single 10-bit data word at the full update rate.
Can the AD9761ARSZ and AD9760AR50 be used interchangeably in an existing design?
No. They differ in channel count, package type, maximum update rate, and on-chip interpolation, so they are not drop-in replacements. Any substitution requires a new PCB layout and verification of the digital interface, clocking, and analog output requirements against the respective datasheets.