Part A
AD9761ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7536 Stückzahl
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD9761ARSZ and AD9762ARUZRL7 are both dual-channel 10-bit and 12-bit current-output DACs respectively, but they differ in resolution, package footprint, and pin configuration, so they are not interchangeable without a full board redesign and validation of the analog output path.
Different resolution
Different package footprint
Different pinout
Different output architecture
Parts at a glance
Part B
AD9762ARUZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6638 Stückzahl
- 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 | AD9761ARSZ | AD9762ARUZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 12 bit | Resolution determines the number of discrete output levels; a 12-bit DAC provides 4x finer quantization than a 10-bit device, directly affecting signal fidelity and dynamic range. |
| Number of D/A Converters | 2 (dual) | 1 (single) | A dual-channel DAC supports I/Q or stereo signal paths in one package, while a single-channel device requires two parts for the same function, affecting board space and channel matching. |
| Update Rate (Sample Rate) | 40 MSPS | 125 MSPS | Maximum update rate sets the highest signal bandwidth the DAC can synthesize; the higher rate part supports wider-band applications such as high-speed communications. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, so external op-amps or transformers are needed to convert to voltage; matching output topology simplifies substitution in the analog front end. |
| Package / Case | 28-SSOP | 28-TSSOP | Footprint and pin layout must match the PCB land pattern; different package families (SSOP vs TSSOP) generally require layout changes and are not drop-in compatible. |
| Supply Voltage | 3.0 V to 5.5 V | 2.7 V to 5.5 V | The supply range determines compatibility with the system rail; a wider or shifted minimum can affect operation at low-voltage nodes and power sequencing. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Identical industrial temperature ratings mean both parts suit the same environmental conditions, so thermal derating and enclosure requirements remain unchanged. |
| Interface | Parallel | Parallel | Both use a parallel data interface, so the digital host connection scheme is compatible; however, bus width differs with resolution, affecting the number of data lines routed. |
| Data Interface Width | 10-bit parallel (per channel) | 12-bit parallel | The number of parallel data lines must match the host bus; a 12-bit interface needs two additional lines versus a 10-bit interface, requiring layout and controller changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9761ARSZ | AD9762ARUZRL7 |
|---|---|---|
| Series | TxDAC+® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 10 | 12 |
| Number of D / A Converters | 2 | 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) | ±0.7, ±0.5 | ±1, ±0.75 |
| Architecture | Current Source | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | AD9761 | AD9762 |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD9761ARSZ and AD9762ARUZRL7?
The AD9761ARSZ is a dual-channel 10-bit TxDAC+ digital-to-analog converter in a 28-lead SSOP package, while the AD9762ARUZRL7 is a single-channel 12-bit TxDAC+ DAC in a 28-lead TSSOP package supplied in tape-and-reel format. The AD9761 integrates two 10-bit DACs with on-chip digital interpolation filters, whereas the AD9762 provides one 12-bit DAC with higher resolution but no dual-channel or interpolation features.
Do the AD9761ARSZ and AD9762ARUZRL7 have the same resolution and channel count?
No. The AD9761ARSZ offers 10-bit resolution with two DAC channels, and the AD9762ARUZRL7 offers 12-bit resolution with a single DAC channel. Designs requiring dual synchronized outputs should use the AD9761, while designs prioritizing higher resolution on one channel should use the AD9762.
Are the AD9761ARSZ and AD9762ARUZRL7 pin-compatible or package-compatible?
No. The AD9761ARSZ uses a 28-lead SSOP package, and the AD9762ARUZRL7 uses a 28-lead TSSOP package. The package body dimensions and PCB land patterns differ, and the pin functions are not identical because the devices have different channel counts and feature sets, so they are not drop-in replacements.
What are the maximum update rates of the AD9761ARSZ and AD9762ARUZRL7?
The AD9761ARSZ supports an update rate of up to 40 MSPS per channel, and the AD9762ARUZRL7 supports an update rate of up to 125 MSPS. The AD9762 is therefore better suited to higher-speed single-channel signal synthesis, while the AD9761 targets dual-channel applications at lower sample rates.
What supply voltages do the AD9761ARSZ and AD9762ARUZRL7 require?
Both devices operate from a single 3.0 V to 5.5 V analog supply and a 2.7 V to 5.5 V digital supply, with separate analog and digital supply pins to support mixed-signal board layouts. Designers should confirm the exact recommended operating conditions in the respective Analog Devices datasheets before finalizing the power tree.
Do the AD9761ARSZ and AD9762ARUZRL7 include on-chip interpolation filters?
The AD9761ARSZ includes on-chip 2x digital interpolation filters with selectable filter modes, which help relax the requirements on the reconstruction filter in dual-channel transmit paths. The AD9762ARUZRL7 does not include digital interpolation filters; it is a straight single-channel DAC, so any interpolation must be performed externally in the digital domain.
What are the output interface types of the AD9761ARSZ and AD9762ARUZRL7?
Both devices use a parallel digital input interface. The AD9761ARSZ accepts two 10-bit parallel words for its dual channels, while the AD9762ARUZRL7 accepts a single 12-bit parallel word. The AD9762's wider input bus reflects its higher resolution, and the AD9761's dual bus structure reflects its two-channel architecture.
Can the AD9761ARSZ and AD9762ARUZRL7 be used in the same application without design changes?
No. Because they differ in resolution, channel count, package, pinout, and maximum update rate, substituting one for the other requires schematic, layout, and digital interface changes. The AD9761ARSZ suits dual-channel transmit designs with interpolation, while the AD9762ARUZRL7 suits single-channel, higher-resolution, higher-speed designs.