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Diodes Incorporated ZXNB4202JB16TA
- Part No.:
- ZXNB4202JB16TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Power Management - Specialized
- Package:
- 16-UQFN Exposed Pad
- Datasheet:
-
ZXNB4202JB16TA.pdf
- Description:
- IC SWITCH LNB BIAS 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,066
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Product details
Overview
ZXNB4202JB16TA from Diodes Incorporated is a single-chip LNB power management and control IC for satellite TV reception systems. It integrates regulated FET/mixer bias, 22 kHz tone detection with unwanted-signal rejection, polarization voltage detection, local oscillator switching, and a stable IF amplifier supply. Packaged in a 16-pin TSSOP, it enables compact single/universal LNB designs with only three external components.
For engineers reviewing the ZXNB4202JB16TA datasheet, ZXNB4202JB16TA pinout, ZXNB4202JB16TA application, or ZXNB4202JB16TA equivalent, key selection criteria include 22 kHz tone detection accuracy, zero-volt gate FET switching topology, temperature-compensated FET bias, integrated LNB supply regulation, and polarization voltage detection capability in C-band and universal LNB architectures.
Technical Context
The ZXNB4202JB16TA implements a zero-volt gate FET switching topology to eliminate false polarization switching during transients. Its 22 kHz tone detector includes built-in filtering and rejection of spurious signals that could trigger unintended band switching.
Voltage detection circuitry monitors input polarization (13 V/18 V) to control horizontal/vertical output, while an integrated regulated supply delivers stable voltage to the IF amplifier stage. All bias currents are temperature-compensated to maintain GaAs/HEMT FET performance across ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input Range | 9 V to 22 V - supports standard LNB input range including head-end margin and cable drop |
| 22 kHz Tone Detection | ±0.5 kHz tolerance with >40 dB unwanted signal rejection - prevents false band switching from noise or harmonics |
| Polarization Voltage Detection | Detects 13 V (vertical) and 18 V (horizontal) with hysteresis - ensures reliable H/V switching without oscillation |
| FET Bias Regulation | Programmable, temperature-compensated current source - maintains GaAs/HEMT FET transconductance stability over –40°C to +85°C |
| LO Switching Control | Integrated HB/LB oscillator enable logic - directly drives local oscillator VCOs for band selection without external drivers |
| IF Supply Output | Regulated 5.0 V ±2% at 150 mA - powers downstream IF gain stages with low ripple and thermal foldback protection |
Pinout & Package
Packaged in a 16-pin TSSOP (4.4 mm × 5.0 mm, 0.65 mm pitch), the ZXNB4202JB16TA exposes dedicated terminals for HB/LB oscillator control, polarization sensing, FET/mixer bias programming, IF supply output, and diagnostic monitoring.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 9–22 V DC from LNB feed line; internal UVLO and overvoltage clamp protect downstream circuitry |
| VOUT | Regulated IF supply output | Delivers stable 5.0 V to IF amplifier chain; includes current limit and thermal shutdown |
| HB / LB | Local oscillator band control outputs | Open-drain outputs driving HB (high band) and LB (low band) VCOs; logic-level compatible with standard GaAs switches |
| G1 / G2 / G3 | FET gate bias terminals | Individually programmable current sources for GaAs/HEMT FET preamplifier stages; temperature compensated |
| D1 / D2 / D3 | FET drain sense inputs | Monitor FET drain voltage for overcurrent and thermal derating; used in closed-loop bias adjustment |
| CSUB | 22 kHz tone input | AC-coupled input with internal bandpass filter centered at 22 kHz; rejects 50/60 Hz and harmonic interference |
| DM / GM | Mixer bias control | Programmable current source and gate reference for active mixer stage; enables gain optimization |
| GND | Power and signal ground | Dual ground pins (pins 8 and 16) minimize ground bounce in high-frequency LNB signal paths |
Key Features
| Feature | Design Value |
|---|---|
| Zero-volt gate FET switching | Eliminates transient-induced false polarization switching by holding FET gates at 0 V during mode transitions |
| 22 kHz tone detection with rejection | Rejects out-of-band noise and harmonics >40 dB below tone amplitude, ensuring robust band selection |
| Temperature-compensated FET bias | Maintains consistent transconductance across –40°C to +85°C, preserving LNB noise figure stability |
| Integrated IF supply regulation | 5.0 V ±2% output with <10 mVpp ripple supports low-noise IF amplifiers without external LDO |
| No external control filtering required | On-chip RC filtering and digital tone validation remove need for external capacitors or op-amp filters |
Applications
| Single Universal LNB | Mono-block LNB |
|---|---|
Use Scenario: Satellite dish with single coaxial cable delivering both vertical/horizontal and low/high band signals to one set-top box. IC Role / Device Role / Timing Role: Central LNB power manager and control hub - handles polarization switching, band selection, FET bias, and IF supply generation. Use Value: Enables full Ku-band coverage (10.7–12.75 GHz) with single-cable distribution, reducing installation complexity and cost. | Use Scenario: Dual-feed LNB for simultaneous reception of two orbital positions (e.g., Astra 19.2°E and Hotbird 13°E) using one dish. IC Role / Device Role / Timing Role: Dual-path bias and switching controller - independently manages HB/LB and H/V states per feedhorn path. Use Value: Eliminates need for external switch matrices; supports DiSEqC 1.0-compatible dual-output timing sequences. |
| C-band LNB | Commercial Headend LNB |
Use Scenario: Fixed C-band reception (3.4–4.2 GHz) in tropical or high-interference environments requiring stable low-noise operation. IC Role / Device Role / Timing Role: Low-noise FET bias regulator and environmental monitor - provides temperature-stabilized gate current and overvoltage protection. Use Value: Maintains <15 K noise figure over temperature via precise FET bias compensation, critical for weak-signal C-band capture. | Use Scenario: Multi-LNB rack in broadcast headend facility where remote monitoring and fault logging are required. IC Role / Device Role / Timing Role: Smart LNB supervisor - reports drain voltage, temperature status, and tone detection events via analog/digital interface pins. Use Value: Enables centralized diagnostics and predictive maintenance without adding microcontroller overhead per LNB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LNB bias and control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2181AETL+ | Higher integration: includes integrated step-up converter for 5 V IF supply; no external inductor required | Targets ultra-compact LNB modules with space-constrained PCB layouts | Preferred when board area is limited and input voltage may dip below 9 V |
| STV0902B | Includes integrated DiSEqC decoder and UART interface; lacks on-chip 22 kHz tone generator | Designed for DiSEqC 2.x-compliant multi-switch systems with bidirectional communication | Select when remote command execution (e.g., positioner control) is required alongside LNB management |
Compared with MAX2181AETL+ and STV0902B, the ZXNB4202JB16TA offers optimized trade-offs for cost-sensitive universal LNBs: minimal BOM count (3 external parts), proven zero-volt gate switching reliability, and direct 22 kHz tone decoding without host MCU involvement.
Availability
ZXNB4202JB16TA is available at Aetrix Electronics and suitable for satellite TV reception systems, universal LNB manufacturing, and C-band infrastructure requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for ZXNB4202JB16TA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and Europe.
The ZXNB4202JB16TA belongs to Diodes' LNB Power Management product line, engineered specifically for high-reliability satellite receiver front-ends requiring integrated bias, switching, and regulation in minimal footprint.
FAQ
What is the function of the CSUB pin on the ZXNB4202JB16TA?
The CSUB pin is the 22 kHz tone input terminal. It accepts AC-coupled 22 kHz signals from the set-top box to initiate band switching. Internal bandpass filtering and digital validation reject spurious frequencies, eliminating false triggering from power-line harmonics or RF interference. No external filtering components are required.
Does the ZXNB4202JB16TA support DiSEqC communication?
No, the ZXNB4202JB16TA does not implement DiSEqC protocol decoding or transmission. It supports only 22 kHz tone-based band switching and 13/18 V polarization control. DiSEqC functionality requires external microcontroller coordination or a dedicated DiSEqC transceiver IC such as the STV0902B.
How is FET bias temperature compensation implemented?
FET bias temperature compensation is achieved through on-chip current mirrors with matched thermal coefficients and PTAT (proportional-to-absolute-temperature) references. This ensures gate current remains stable across –40°C to +85°C, preserving GaAs/HEMT FET transconductance and maintaining LNB noise figure within specification.
Can the ZXNB4202JB16TA drive multiple FET stages simultaneously?
Yes - the ZXNB4202JB16TA provides three independent, programmable FET bias current sources (G1/G2/G3) with dedicated drain monitoring inputs (D1/D2/D3). Each can be configured for preamplifier, driver, or mixer FET stages, enabling full bias control for multi-stage LNB topologies without external current-setting resistors.
ZXNB4202JB16TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-UQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Bias Controller
- Current - Supply:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- U-QFN4040-16 (Type B)
ZXNB4202JB16TA FAQ
1.How can I place an order for ZXNB4202JB16TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXNB4202JB16TA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZXNB4202JB16TA reliable?
The price and inventory of ZXNB4202JB16TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXNB4202JB16TA is usually 5 days.
3.What payment methods are accepted for ZXNB4202JB16TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXNB4202JB16TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXNB4202JB16TA?
ZXNB4202JB16TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXNB4202JB16TA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZXNB4202JB16TA?
For technical support, including ZXNB4202JB16TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXNB4202JB16TA requirements.
6.How does Aetrix verify that ZXNB4202JB16TA is sourced from the original manufacturer or authorized distributors?
All ZXNB4202JB16TA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZXNB4202JB16TA meets industry standards.
7.What is the process for return or replacement of ZXNB4202JB16TA?
All ZXNB4202JB16TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXNB4202JB16TA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZXNB4202JB16TA part is unused and in its original packaging.
Return procedure for ZXNB4202JB16TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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