Part A
AD9744ARUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6063 個数
- Package
- TSSOP-28
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9744ARUZ and AD9744AR are functionally equivalent 14-bit current-output DACs sharing identical resolution, converter architecture, and electrical performance; the only material distinction is the package and thermal profile, so the AD9744ARUZ can serve as a functional replacement for the AD9744AR provided the board layout accommodates the TSSOP-28 footprint and thermal requirements are validated.
Resolution and Converter Architecture
High match
Package Type and Footprint
Not compatible
Electrical Performance
High match
Thermal and Operating Conditions
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9744ARUZ | AD9744AR | Why it matters |
|---|---|---|---|
| Package / Case | 28-TSSOP (Thin Shrink Small Outline Package) | 28-SOIC (Small Outline Integrated Circuit) | The two parts use different package footprints, so they are not drop-in board-level replacements; PCB land patterns must match the chosen package. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, but the differing body width and lead pitch affect assembly and reflow profiles. |
| Pin Count | 28 | 28 | Identical pin count means the same signal assignment is preserved, but the physical pin pitch differs between TSSOP and SOIC. |
| Lead Pitch | 0.65 mm | 1.27 mm | Finer pitch on the TSSOP requires tighter PCB trace/space rules and more precise stencil apertures than the wider SOIC pitch. |
| Body Width | 4.4 mm | 7.5 mm | The narrower TSSOP body saves board area, while the wider SOIC body offers easier hand soldering and inspection. |
| Thermal Resistance (θJA) | Approximately 90 °C/W (TSSOP) | Approximately 75 °C/W (SOIC) | Lower junction-to-ambient thermal resistance on the SOIC allows slightly more power dissipation headroom at the same ambient temperature. |
| Moisture Sensitivity Level (MSL) | MSL 1 (unlimited floor life) | MSL 1 (unlimited floor life) | Both share the same MSL rating, so storage and handling requirements are equivalent despite the package difference. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free (Z suffix) | Non-RoHS, contains lead (no Z suffix) | The "Z" suffix denotes lead-free/RoHS compliance; the non-Z part contains lead, which affects regulatory compliance and solder process compatibility. |
| Resolution | 14-bit | 14-bit | Identical 14-bit resolution confirms the same DAC core and quantization performance for both variants. |
| Update Rate | 210 MSPS | 210 MSPS | Same maximum update rate means identical dynamic performance and bandwidth capability regardless of package. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9744ARUZ | AD9744AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Obsolete |
| Number of Bits | 14 | - |
| 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 | 2.7V ~ 3.6V | - |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | - |
| INL / DNL(LSB) | ±0.8, ±0.5 | - |
| Architecture | Current Source | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What is the difference between the AD9744ARUZ and the AD9744AR?
The AD9744ARUZ and AD9744AR are both 14-bit, 210 MSPS TxDAC digital-to-analog converters from Analog Devices. The primary difference is the package and ordering code: the AD9744ARUZ is supplied in a 28-lead TSSOP (RU suffix) in RoHS-compliant form (Z suffix), while the AD9744AR is supplied in a 28-lead SOIC (R suffix) in non-RoHS form. Both share the same core DAC specifications, including 14-bit resolution, 210 MSPS update rate, and a 5 V or 3.3 V supply option.
Are the AD9744ARUZ and AD9744AR electrically and functionally interchangeable?
Functionally, both devices are the same 14-bit, 210 MSPS TxDAC converter with identical resolution, update rate, and current-output architecture. However, they are not drop-in replacements because they use different package types (TSSOP vs SOIC) with different pin counts and PCB land patterns. A board designed for one package cannot accept the other without a layout change.
What is the resolution and maximum update rate of the AD9744ARUZ and AD9744AR?
Both the AD9744ARUZ and AD9744AR are 14-bit DACs with a maximum update rate of 210 MSPS, as specified in the Analog Devices AD9744 datasheet. They are members of the TxDAC family intended for high-speed communications and signal synthesis applications.
What supply voltages do the AD9744ARUZ and AD9744AR support?
Per the Analog Devices AD9744 datasheet, both devices operate from a single 3.3 V or 5 V supply, with a separate digital supply pin for interfacing to 1.8 V to 3.3 V logic. The current-output DAC architecture provides a nominal full-scale output current of 20 mA, adjustable via an external resistor.
Does the "Z" suffix on the AD9744ARUZ indicate RoHS compliance?
Yes. In Analog Devices ordering nomenclature, the "Z" suffix denotes a RoHS-compliant, lead-free package. The AD9744ARUZ is therefore the RoHS-compliant TSSOP version, whereas the AD9744AR (SOIC, no Z suffix) is the non-RoHS version. Designers with RoHS requirements should select the AD9744ARUZ.
What package types do the AD9744ARUZ and AD9744AR use?
The AD9744ARUZ uses a 28-lead TSSOP package (RU suffix), and the AD9744AR uses a 28-lead SOIC package (R suffix). Both are surface-mount packages, but their body dimensions, lead pitch, and PCB footprint differ, so the correct land pattern must be used for each variant.
Can the AD9744ARUZ and AD9744AR be used in the same circuit design?
Yes, from a functional standpoint both devices perform the same 14-bit, 210 MSPS digital-to-analog conversion and can be used in equivalent circuit topologies. The design must, however, account for the different package footprints and the RoHS status difference. The schematic-level connections are equivalent, but the PCB layout must match the selected package.
Which variant should be chosen for a new RoHS-compliant design?
For a new design requiring RoHS compliance, the AD9744ARUZ (TSSOP, Z suffix) is the appropriate choice because it is the lead-free, RoHS-compliant ordering option. The AD9744AR (SOIC, non-Z) should be selected only where non-RoHS SOIC packaging is specifically required or already qualified.