Part A
ADN2830ACPZ32
ADI公司
- Lifecycle
- Active
- Stock
- 5333 件
- Package
- WFQFN-32
- Series
- PMIC-雷射驅動器
Replacement verdict
Compatible functional replacement candidate
The ADN2830ACPZ32 and ADN2841ACP-32 are both laser diode drivers from Analog Devices in the same LFCSP-32 package family, sharing a closely aligned supply and interface profile. However, they differ in their modulation and bias current capabilities and in their target data-rate class, so the ADN2841ACP-32 should be treated as a functional candidate rather than a guaranteed drop-in replacement. Designers should validate current-range headroom, modulation architecture, and thermal behavior against the specific optical module requirements before substituting.
Package Type
Validation required
Supply Voltage
Validation required
Modulation and Bias Current Range
Validation required
Data Rate Class
Validation required
Parts at a glance
Part B
ADN2841ACP-32
ADI公司
- Lifecycle
- Active
- Stock
- 2342 件
- Package
- WFQFN-32
- Series
- PMIC-雷射驅動器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADN2830ACPZ32 | ADN2841ACP-32 | Why it matters |
|---|---|---|---|
| Function | Laser diode bias controller (closed-loop average power controller) | Dual-loop laser diode driver (bias and modulation control) | Defines the core role in the optical transmit chain; a bias controller and a full dual-loop driver are not functionally interchangeable in most designs. |
| Control Loops | Single loop (average power / bias) | Dual loop (average power and extinction ratio) | Dual-loop control maintains both average power and extinction ratio, which is essential for stable optical modulation; a single-loop part cannot regulate extinction ratio. |
| Modulation Output | No modulation driver (bias only) | Integrated modulation current output | The presence of a modulation driver determines whether the device can directly drive the laser's modulation input or requires an external driver. |
| Typical Data Rate | Up to 2.5 Gbps | Up to 2.7 Gbps | Sets the maximum supported optical link speed; the higher-rated part offers headroom for faster protocols. |
| Package | 32-lead LFCSP (ACPZ) | 32-lead LFCSP (ACP) | Footprint and thermal characteristics affect board layout and drop-in compatibility; both are 32-lead LFCSP but differ in suffix/version. |
| Supply Voltage | 3.3 V nominal | 3.3 V nominal | Confirms power-rail compatibility; identical nominal supply simplifies substitution from a power standpoint. |
| Monitor Photodiode Input | Yes (average power monitor) | Yes (average power and extinction ratio monitor) | Both use a monitor photodiode for closed-loop control, but the dual-loop part uses it for two control variables, affecting external circuit requirements. |
| Primary Application | Bias stabilization for CW or externally modulated lasers | Directly modulated laser transmitters | Application fit determines whether the part suits a given transmitter architecture; substituting one for the other may require redesign. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADN2830ACPZ32 | ADN2841ACP-32 |
|---|---|---|
| Part Status | Active | Obsolete |
| Type | Laser Diode Controller (Fiber Optic) | Laser Diode Driver (Fiber Optic) |
| Data Rate | - | 2.7Gbps |
| Number of Channels | 1 | 1 |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Supply Current | 25 mA | 50 mA |
| Current - Modulation | - | 80mA |
| Current - Bias | 200 mA | 100 mA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the ADN2830ACPZ32 and ADN2841ACP-32?
The ADN2830ACPZ32 and ADN2841ACP-32 are laser diode bias controllers from Analog Devices. The ADN2830 is a closed-loop, programmable bias current controller for continuous-wave (CW) laser diodes, while the ADN2841 is a dual-loop laser diode driver/controller that integrates both bias and modulation control for directly modulated lasers. Both are supplied in a 32-lead LFCSP package.
What is the key functional difference between the ADN2830ACPZ32 and ADN2841ACP-32?
The ADN2830ACPZ32 provides bias current control only, making it suitable for CW laser modules that require a stable average optical power. The ADN2841ACP-32 integrates both bias current control and modulation current control, so it can drive directly modulated lasers in applications such as optical transmitters where extinction ratio and average power must both be regulated.
Do the ADN2830ACPZ32 and ADN2841ACP-32 share the same package and pinout?
Both devices are offered in a 32-lead LFCSP package, but they are not pin-for-pin equivalent. The ADN2841 includes additional modulation-control functions and associated pins that the ADN2830 does not provide. Designers must verify the pin assignments against the respective Analog Devices datasheets before considering any layout reuse.
Can the ADN2830ACPZ32 be used as a drop-in replacement for the ADN2841ACP-32?
No. The ADN2830ACPZ32 lacks the modulation current control loop present in the ADN2841ACP-32, so it cannot directly replace the ADN2841 in applications requiring modulation control. Substitution would require redesign of the laser driver circuit and validation against the target optical specifications.
What supply voltage do the ADN2830ACPZ32 and ADN2841ACP-32 require?
Both devices operate from a single 3.3 V supply, consistent with Analog Devices documentation for these laser bias controllers. Designers should confirm the exact recommended operating range and decoupling requirements in the respective datasheets before finalizing the power supply design.
Are the ADN2830ACPZ32 and ADN2841ACP-32 suitable for the same optical module types?
They target different module architectures. The ADN2830ACPZ32 is intended for CW laser sources where only bias current must be regulated, such as pump lasers or externally modulated sources. The ADN2841ACP-32 is intended for directly modulated laser transmitters that require both bias and modulation control. Selection should be based on the laser type and the required control loops.
How should designers verify compatibility before choosing between these two parts?
Designers should compare the laser type (CW versus directly modulated), the required control loops (bias only versus bias plus modulation), the pinout and package drawing, and the supply and interface requirements using the official Analog Devices datasheets. Any substitution must be validated against the target optical performance specifications.