Part A
AD9742ACPZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1312 ПКС
- Package
- LFCSP-32
- Series
- Сбор данных - цифровые в аналоговые преобразователи (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9742ACPZ and AD9742ACPZRL7 are functionally identical, differing only in packaging format: the AD9742ACPZ is supplied in a 32-lead LFCSP tray, while the AD9742ACPZRL7 is the same device in tape-and-reel packaging for automated assembly. Both share identical die, electrical specifications, and pinout, making them fully interchangeable for design and qualification purposes; the choice between them is driven solely by manufacturing handling requirements.
Resolution and Data Interface
High match
Package and Pinout
High match
Electrical Specifications
High match
Packaging Format
High match
Parts at a glance
Part B
AD9742ACPZRL7
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5560 ПКС
- Package
- WFQFN-32
- Series
- Сбор данных - цифровые в аналоговые преобразователи (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 | AD9742ACPZ | AD9742ACPZRL7 | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Determines the quantization accuracy of the DAC output; identical resolution means equivalent signal fidelity. |
| Number of DAC Channels | 1 | 1 | Single-channel architecture must match for direct functional substitution in a circuit. |
| Sampling Rate (Max) | 210 MSPS | 210 MSPS | Maximum update rate defines the bandwidth the DAC can support; identical rates ensure equivalent dynamic performance. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output topology must match to ensure compatibility with downstream analog stages. |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | Operating supply range must be compatible with the system power rail for direct replacement. |
| Package / Case | 32-WFQFN Exposed Pad, CSP | 32-WFQFN Exposed Pad, CSP | Identical package and footprint allow drop-in board replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Assembly method must match the PCB manufacturing process. |
| Operating Temperature Range | -40°C to 85°C | -40°C to 85°C | Thermal range must cover the application environment for reliable operation. |
| Packaging / Ordering Format | Tray / Tube (individual) | Tape & Reel (7-inch reel) | The only functional difference is the shipping format; reel packaging suits automated high-volume assembly while tray suits prototyping. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9742ACPZ | AD9742ACPZRL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | TxDAC® | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 11ns (Typ) | 11ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| INL / DNL(LSB) | ±0.5, ±0.4 | ±0.5, ±0.4 |
| Architecture | Current Source | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What is the difference between AD9742ACPZ and AD9742ACPZRL7?
The AD9742ACPZ and AD9742ACPZRL7 are the same 12-bit, 210 MSPS TxDAC digital-to-analog converter in a 32-lead LFCSP package. The difference is packaging format: AD9742ACPZ is supplied in trays, while AD9742ACPZRL7 is supplied in tape-and-reel (7-inch reel) for automated assembly.
Are AD9742ACPZ and AD9742ACPZRL7 electrically and functionally identical?
Yes. Both orderable part numbers share the same die, package, pinout, and specified performance. The AD9742 is a 12-bit, 210 MSPS DAC with an on-chip 1.20 V reference, differential current outputs, and a 2.7 V to 3.6 V supply range. The suffix difference reflects shipping media only.
Can AD9742ACPZ and AD9742ACPZRL7 be used interchangeably in a design?
Yes, from a technical standpoint they are interchangeable because they are the same device in the same 32-lead LFCSP package. The choice between them depends on the assembly process: trays (AD9742ACPZ) for low-volume or manual handling, and tape-and-reel (AD9742ACPZRL7) for automated pick-and-place production lines.
What are the key performance specifications of the AD9742?
The AD9742 is a 12-bit TxDAC with a maximum update rate of 210 MSPS, an on-chip 1.20 V reference, and a spurious-free dynamic range (SFDR) of 75 dBc at 5 MHz output for a 50 MSPS update rate. It operates from a 2.7 V to 3.6 V supply and provides differential current outputs of 2 mA to 20 mA.
What package and pin count do AD9742ACPZ and AD9742ACPZRL7 use?
Both parts are offered in a 32-lead LFCSP (lead frame chip scale package) with an exposed pad. The exposed pad should be connected to the analog ground plane for proper thermal and electrical performance.
What is the operating temperature range for these devices?
The AD9742ACPZ and AD9742ACPZRL7 are specified over the industrial temperature range of -40°C to +85°C, making them suitable for industrial and communications applications.
Which applications are the AD9742ACPZ and AD9742ACPZRL7 suited for?
These DACs are intended for communications systems such as base stations, wideband wireless transceivers, and digital signal synthesis. Their 12-bit resolution and 210 MSPS update rate support direct IF synthesis and other high-speed signal generation tasks.
How should the output of the AD9742 be terminated for optimal performance?
The AD9742 provides differential current outputs (IOUTA and IOUTB) that are typically terminated into a 50 Ω load or a transformer-coupled network. For best AC performance, a differential-to-single-ended transformer or an operational amplifier configured as a differential I/V converter is recommended, with the output compliance voltage kept within the specified range.