Part A
ADF4002BCPZ
ADI公司
- Lifecycle
- Active
- Stock
- 3484 件
- Package
- WFQFN-20
- Series
- 時鐘定時-時鐘發生器、PLL、頻率合成器
Replacement verdict
Compatible functional replacement candidate
The ADF4001BCP and ADF4002BCPZ are both single PLL frequency synthesizers from Analog Devices in a 20-lead LFCSP package, sharing a common pin function set and 3 V to 5.5 V supply range, so the ADF4002BCPZ can serve as a functional replacement candidate for the ADF4001BCP in many designs. However, the ADF4002BCPZ adds a programmable phase detector polarity and a higher maximum RF input frequency, while the ADF4001BCP offers a slightly higher maximum phase detector frequency; designers should validate loop filter values, reference input configuration, and phase detector polarity settings against the target application before substituting.
Package Type
High match
Supply Voltage Range
High match
Maximum RF Input Frequency
Validation required
Phase Detector Frequency
Validation required
Parts at a glance
Part B
ADF4001BCP
ADI公司
- Lifecycle
- Active
- Stock
- 4879 件
- Package
- WFQFN-20
- Series
- 時鐘定時-時鐘發生器、PLL、頻率合成器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADF4002BCPZ | ADF4001BCP | Why it matters |
|---|---|---|---|
| Function Type | PLL Frequency Synthesizer (with integrated prescaler) | PLL Frequency Synthesizer (no integrated prescaler) | Determines whether an external prescaler is required; the ADF4002 includes an on-chip prescaler while the ADF4001 does not, affecting external component count and design complexity. |
| Maximum RF Input Frequency | 400 MHz | 200 MHz | Sets the upper limit of the reference/feedback signal the PLL can accept; a higher limit enables use in higher-frequency applications. |
| Integrated Prescaler | Yes (dual-modulus) | No | An integrated prescaler allows direct connection to higher-frequency VCOs without external divider circuitry, simplifying the loop design. |
| Supply Voltage Range | 2.7 V to 3.3 V | 2.7 V to 5.5 V | Defines the compatible power supply; the wider range of the ADF4001 allows operation from 5 V rails, while the ADF4002 is limited to 3.3 V systems. |
| Package | 20-Lead LFCSP (CP-20-1) | 20-Lead LFCSP (CP-20-1) | Package footprint and thermal characteristics affect PCB layout and assembly; matching packages ease board-level substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Indicates the environmental range over which the device is guaranteed to operate; identical ranges mean equivalent thermal robustness. |
| Charge Pump Current (Programmable) | Programmable (up to ~5 mA) | Programmable (up to ~5 mA) | Charge pump current sets loop bandwidth and phase noise performance; programmability allows tuning of the PLL loop dynamics. |
| Digital Interface | 3-wire serial (SPI-compatible) | 3-wire serial (SPI-compatible) | Defines how the device is configured by a microcontroller; identical interfaces allow reuse of firmware and control logic. |
| Number of Registers / Programmability | Multiple programmable registers (R, N, function latch) | Multiple programmable registers (R, N, function latch) | Register architecture determines configuration flexibility for reference and feedback dividers, affecting achievable frequency resolution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADF4002BCPZ | ADF4001BCP |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Type | Clock/Frequency Synthesizer (RF), Phase Detector | Clock Generator (RF) |
| PLL | Yes with Bypass | Yes |
| Input | CMOS, TTL | Clock |
| Output | Clock | Clock |
| Ratio - Input: Output | 2:1 | 2:1 |
| Differential - Input: Output | Yes/No | Yes/No |
| Frequency - Max | 400MHz | 200MHz |
| Divider / Multiplier | Yes/No | Yes/No |
| Voltage - Supply | 2.7V ~ 3.3V | 2.7V ~ 5.5V |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Circuits | 1 | - |
| Operating Temperature | -40°C ~ 85°C | - |
Frequently asked questions
What are the key differences between the ADF4002BCPZ and the ADF4001BCP?
The ADF4002BCPZ is a 400 MHz PLL frequency synthesizer with an integrated phase detector and programmable charge pump, while the ADF4001BCP is a 200 MHz PLL frequency synthesizer with similar architecture but a lower maximum operating frequency. The ADF4002BCPZ supports a maximum RF input frequency of 400 MHz, whereas the ADF4001BCP is specified for 200 MHz. Both are housed in 20-lead LFCSP packages, but the ADF4002BCPZ is specified over the -40°C to +85°C temperature range, and the ADF4001BCP is specified over the -40°C to +85°C range as well.
Are the ADF4002BCPZ and ADF4001BCP pin-compatible?
Yes, both devices are offered in a 20-lead LFCSP package with the same pinout, allowing them to share a common PCB footprint. However, designers should verify the specific package outline and land pattern in the respective manufacturer datasheets before substituting one for the other.
Can the ADF4002BCPZ be used as a drop-in replacement for the ADF4001BCP?
In many cases yes, because both are 20-lead LFCSP PLL synthesizers with the same pinout and similar register maps. However, the ADF4002BCPZ supports a higher maximum RF input frequency (400 MHz vs. 200 MHz) and may have different charge pump current settings and phase detector characteristics. The replacement should be validated against the ADF4002BCPZ datasheet for the specific application.
What is the maximum RF input frequency for each device?
The ADF4002BCPZ has a maximum RF input frequency of 400 MHz. The ADF4001BCP has a maximum RF input frequency of 200 MHz. These values are specified in the respective manufacturer datasheets.
Do both devices use the same supply voltage range?
Yes, both the ADF4002BCPZ and the ADF4001BCP operate from a 2.7 V to 3.3 V supply. Designers should confirm the exact supply range and decoupling requirements in the manufacturer datasheets for each part.
What is the difference in charge pump current between the two parts?
Both devices feature a programmable charge pump, but the available current settings and their ranges may differ. The ADF4002BCPZ datasheet specifies programmable charge pump currents, and the ADF4001BCP datasheet specifies its own set of programmable currents. The exact values should be taken from the respective manufacturer datasheets rather than assumed to be identical.
Are both devices specified over the same operating temperature range?
Yes, both the ADF4002BCPZ and the ADF4001BCP are specified over the -40°C to +85°C industrial temperature range, as stated in their manufacturer datasheets.