Part A
AD9761ARSZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7536 PCS
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD9761ARSZ and AD9760ARU are both dual-channel 10-bit current-output DACs, but they differ in package type, pin count, and supply voltage range, so the AD9760ARU cannot be used as a direct drop-in substitute for the AD9761ARSZ without board-level redesign and validation.
Different package type
Different pin count
Different supply voltage range
Different interface configuration
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 | AD9760ARU | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 10 bit | Both converters offer 10-bit resolution, so quantization accuracy is equivalent for signal reconstruction. |
| Number of DAC Channels | 2 (dual) | 1 (single) | A dual-channel device can drive I/Q or stereo paths in one package, while a single-channel part requires two devices for the same function. |
| Update Rate (Max) | 40 MSPS | 125 MSPS | Maximum sample rate determines the highest signal bandwidth the DAC can synthesize; the single-channel part supports much higher throughput. |
| Package / Mounting | 28-Lead SSOP | 28-Lead TSSOP | Footprint and board layout differ between SSOP and TSSOP, affecting drop-in compatibility on an existing PCB. |
| Supply Voltage (Analog/Digital) | 3.0 V to 5.5 V | 2.7 V to 5.5 V | Operating supply range affects compatibility with the system rail; the wider low-end range of the single-channel part allows lower-voltage operation. |
| Output Type | Current output (differential) | Current output (differential) | Both provide differential current outputs, so the external I/V conversion stage topology is similar for either device. |
| On-Chip Reference | Yes (internal 1.20 V) | Yes (internal 1.20 V) | An internal reference simplifies the design by removing the need for an external precision voltage reference. |
| Power Consumption | Approx. 155 mW (dual, 3 V) | Approx. 175 mW (single, 5 V) | Power budget influences thermal design and supply sizing; the dual-channel part delivers two channels at comparable total power. |
| 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. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9761ARSZ | AD9760ARU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Series | TxDAC+® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 10 | 10 |
| 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) | - | ±0.5, ±0.25 |
| 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 AD9760ARU?
The AD9761ARSZ is a dual-channel 10-bit 40 MSPS TxDAC+ with integrated 2x interpolation filters, while the AD9760ARU is a single-channel 10-bit 125 MSPS TxDAC+ without interpolation. The AD9761ARSZ comes in a 28-lead SSOP package, whereas the AD9760ARU is offered in a 28-lead TSSOP package. They differ in channel count, maximum update rate, and on-chip digital signal processing features.
Can the AD9761ARSZ and AD9760ARU be used interchangeably in the same design?
No. The AD9761ARSZ is a dual DAC with 2x interpolation and a 40 MSPS maximum update rate, while the AD9760ARU is a single DAC with a 125 MSPS maximum update rate and no interpolation. Pinouts, package footprints (SSOP vs TSSOP), channel count, and digital interface requirements differ, so a direct drop-in replacement is not possible without redesign and validation.
What is the maximum update rate of each device?
The AD9761ARSZ supports a maximum update rate of 40 MSPS per channel. The AD9760ARU supports a maximum update rate of 125 MSPS. These rates are specified in the respective manufacturer datasheets.
What resolution and DAC architecture do these parts use?
Both the AD9761ARSZ and AD9760ARU are 10-bit TxDAC+ current-output digital-to-analog converters. The AD9761ARSZ integrates two 10-bit DAC cores with 2x interpolation filters, while the AD9760ARU contains a single 10-bit DAC core without interpolation.
What are the package and pin-count differences?
The AD9761ARSZ is supplied in a 28-lead SSOP package. The AD9760ARU is supplied in a 28-lead TSSOP package. Although both have 28 leads, the package body dimensions and PCB land patterns differ, so the footprints are not interchangeable.
Do both devices support the same digital input interface?
Both devices accept parallel digital input words, but the AD9761ARSZ includes on-chip 2x interpolation filters and expects input data at half the DAC update rate, while the AD9760ARU accepts data directly at the full DAC update rate. The digital timing and input data rate requirements therefore differ between the two parts.
Which device is better suited for I/Q transmit signal chains?
The AD9761ARSZ is specifically designed as a dual-channel TxDAC+ with 2x interpolation, making it suited for I/Q transmit paths where two matched DAC channels and interpolation are required. The AD9760ARU is a single-channel DAC and would require two devices plus external interpolation for the same function.
Are the analog output specifications identical between the two parts?
No. While both are 10-bit current-output TxDAC+ devices, their analog output specifications differ because of different maximum update rates and on-chip signal processing. The AD9760ARU's higher 125 MSPS update rate yields different dynamic performance characteristics compared with the AD9761ARSZ's 40 MSPS dual-channel operation. Designers should consult each device's datasheet for verified SFDR, SNR, and output compliance specifications.