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53A-CBSA-1.5X5.75X0.5
Electronics Part Number
53A-CBSA-1.5X5.75X0.5-WXManufacturer
Analog Devices, Inc.
53A-CBSA-1.5X5.75X0.5
Description
1.5 x 5.75 Inch Through-Hole RF Shield, Designed for EMI Reduction in Compact EnclosuresInventory
670 Pcs New Original In Stock
Two-piece RF shield, 1.500x5.750 inches, non-vented, through-hole.
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Technical Specifications
Category
RF Mixers
Manufacturer
Analog Devices, Inc.
Packaging
Tube
Mounting Type
Surface Mount
Package / Case
24-WQFN Exposed Pad
Series
-
Base Product Number
LT5578
Product Status
Active
Gain
1.4dB
Current - Supply
170mA
Frequency
400MHz ~ 2.7GHz
Voltage - Supply
3.3V
Supplier Device Package
24-QFN (5x5)
RF Type
GSM, ISM, PCS, WCDMA
Secondary Attributes
Up Converter
Number of Mixers
1
Noise Figure
8.6dB
Data Sheet Document (D)
Datasheets
Download LT5578IUH#PBF Product Specification (PDF)
HTML Datasheet
LT5578IUH#PBF-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
2156-LT5578IUH#PBF -2735-LT5578IUH#PBF
Standard Package
73
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Frequently Asked Questions (FAQ)
What are the key design risks when replacing the LT5578IUH#PBF with a competing mixer like the HMC77
Replacing the LT5578IUH#PBF with the HMC773ALC3B introduces several design risks: the HMC773ALC3B operates at a higher supply voltage (5V vs. 3.3V), requiring level-shifting or regulator changes; it has a different pinout and package (24-QFN vs. 32-QFN), complicating PCB reuse; and while its noise figure is slightly better (7.5dB vs. 8.6dB), its higher LO drive requirement (+10dBm vs. 0dBm for the LT5578IUH#PBF) may necessitate redesign of the LO buffer stage. Additionally, the LT5578IUH#PBF’s integrated LO buffer simplifies layout, whereas the HMC773ALC3B demands careful impedance matching, increasing EMI risk in compact designs.
Can the LT5578IUH#PBF be safely used in a 5G NR FR1 uplink path operating at 3.5GHz, and what perfor
No, the LT5578IUH#PBF is not recommended for 3.5GHz operation. Its specified frequency range ends at 2.7GHz, and performance degrades significantly beyond this limit. At 3.5GHz, conversion gain drops sharply (likely below -5dB), and port-to-port isolation deteriorates, increasing LO leakage and signal distortion. Even if the device powers on, harmonic mixing and spurious responses become unpredictable. For 3.5GHz applications, consider the Analog Devices HMC8193 or similar wideband mixers rated up to 6GHz to ensure reliable performance and compliance with 5G spectral masks.
How does the LT5578IUH#PBF’s 8.6dB noise figure impact system-level SNR in a low-power WCDMA receive
The LT5578IUH#PBF’s 8.6dB noise figure limits receiver sensitivity, especially in low-input-power WCDMA scenarios. Without a low-noise pre-amplifier (LNA), the system noise floor increases, potentially failing 3GPP TS 25.101 sensitivity specs (typically -115dBm for 5MHz WCDMA). For example, with a 5dB antenna noise figure and 5MHz bandwidth, total NF exceeds 13.6dB, reducing link budget by over 5dB. To mitigate, place a high-performance LNA (e.g., Qorvo QPL9547, NF <1.2dB) before the LT5578IUH#PBF. This improves cascade NF to ~9.8dB, preserving margin for reliable demodulation in marginal signal conditions.
What PCB layout practices are critical to maintain performance when integrating the LT5578IUH#PBF’s
Proper thermal and RF grounding of the LT5578IUH#PBF’s exposed pad is essential. The pad must be soldered directly to a solid ground plane with multiple low-inductance vias (≥9 vias of 0.3mm diameter) to prevent ground bounce and thermal hotspots. Poor grounding increases ground impedance, which couples LO leakage into the RF path, degrading IIP3 and raising intermodulation distortion. In high-density layouts, avoid splitting the ground plane under the device. Use a continuous reference plane and keep RF traces short with controlled impedance (50Ω). Neglecting this can reduce OIP3 by 3–6dB, compromising dynamic range in multi-carrier GSM or WCDMA systems.
Is the LT5578IUH#PBF a drop-in replacement for the older LT5516 in a legacy PCS base station up-conv
The LT5578IUH#PBF is not a true drop-in replacement for the LT5516 due to key differences: the LT5578IUH#PBF requires 3.3V supply (vs. 5V for LT5516), has a different pinout (24-QFN vs. 16-QFN), and includes an integrated LO buffer absent in the LT5516. While both cover 400MHz–2.7GHz, migrating requires PCB re-layout, voltage regulator changes, and potential LO driver reconfiguration. Additionally, the LT5578IUH#PBF’s lower current draw (170mA vs. 220mA) may affect power sequencing logic. Firmware may need updates if bias control was tied to supply rails. Always validate LO drive level and DC blocking caps, as impedance mismatches can cause gain ripple across the PCS band (1.85–1.91GHz).
What are the key design risks when replacing the LT5578IUH#PBF with a competing mixer like the HMC77
Replacing the LT5578IUH#PBF with the HMC773ALC3B introduces several design risks: the HMC773ALC3B operates at a higher supply voltage (5V vs. 3.3V), requiring level-shifting or regulator changes; it has a different pinout and package (24-QFN vs. 32-QFN), complicating PCB reuse; and while its noise figure is slightly better (7.5dB vs. 8.6dB), its higher LO drive requirement (+10dBm vs. 0dBm for the LT5578IUH#PBF) may necessitate redesign of the LO buffer stage. Additionally, the LT5578IUH#PBF’s integrated LO buffer simplifies layout, whereas the HMC773ALC3B demands careful impedance matching, increasing EMI risk in compact designs.
Can the LT5578IUH#PBF be safely used in a 5G NR FR1 uplink path operating at 3.5GHz, and what perfor
No, the LT5578IUH#PBF is not recommended for 3.5GHz operation. Its specified frequency range ends at 2.7GHz, and performance degrades significantly beyond this limit. At 3.5GHz, conversion gain drops sharply (likely below -5dB), and port-to-port isolation deteriorates, increasing LO leakage and signal distortion. Even if the device powers on, harmonic mixing and spurious responses become unpredictable. For 3.5GHz applications, consider the Analog Devices HMC8193 or similar wideband mixers rated up to 6GHz to ensure reliable performance and compliance with 5G spectral masks.
How does the LT5578IUH#PBF’s 8.6dB noise figure impact system-level SNR in a low-power WCDMA receive
The LT5578IUH#PBF’s 8.6dB noise figure limits receiver sensitivity, especially in low-input-power WCDMA scenarios. Without a low-noise pre-amplifier (LNA), the system noise floor increases, potentially failing 3GPP TS 25.101 sensitivity specs (typically -115dBm for 5MHz WCDMA). For example, with a 5dB antenna noise figure and 5MHz bandwidth, total NF exceeds 13.6dB, reducing link budget by over 5dB. To mitigate, place a high-performance LNA (e.g., Qorvo QPL9547, NF <1.2dB) before the LT5578IUH#PBF. This improves cascade NF to ~9.8dB, preserving margin for reliable demodulation in marginal signal conditions.
What PCB layout practices are critical to maintain performance when integrating the LT5578IUH#PBF’s
Proper thermal and RF grounding of the LT5578IUH#PBF’s exposed pad is essential. The pad must be soldered directly to a solid ground plane with multiple low-inductance vias (≥9 vias of 0.3mm diameter) to prevent ground bounce and thermal hotspots. Poor grounding increases ground impedance, which couples LO leakage into the RF path, degrading IIP3 and raising intermodulation distortion. In high-density layouts, avoid splitting the ground plane under the device. Use a continuous reference plane and keep RF traces short with controlled impedance (50Ω). Neglecting this can reduce OIP3 by 3–6dB, compromising dynamic range in multi-carrier GSM or WCDMA systems.
Is the LT5578IUH#PBF a drop-in replacement for the older LT5516 in a legacy PCS base station up-conv
The LT5578IUH#PBF is not a true drop-in replacement for the LT5516 due to key differences: the LT5578IUH#PBF requires 3.3V supply (vs. 5V for LT5516), has a different pinout (24-QFN vs. 16-QFN), and includes an integrated LO buffer absent in the LT5516. While both cover 400MHz–2.7GHz, migrating requires PCB re-layout, voltage regulator changes, and potential LO driver reconfiguration. Additionally, the LT5578IUH#PBF’s lower current draw (170mA vs. 220mA) may affect power sequencing logic. Firmware may need updates if bias control was tied to supply rails. Always validate LO drive level and DC blocking caps, as impedance mismatches can cause gain ripple across the PCS band (1.85–1.91GHz).
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Sep 15 2026
