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Analog Devices Inc. HMC1095LP4ETR
- Part No.:
- HMC1095LP4ETR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Attenuators
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
HMC1095LP4ETR.pdf
- Description:
- RF ATTENUATOR 31.5DB 75OHM 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
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Product details
Overview
HMC1095LP4ETR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC 6-bit digital attenuator operating from DC to 3 GHz in a 75 Ω system, featuring 0.5 dB LSB resolution, 31.5 dB attenuation range, ±0.25 dB typical step error, and TTL/CMOS-compatible serial/parallel control - ideal for CATV infrastructure signal level management.
For engineers reviewing the HMC1095LP4ETR datasheet, HMC1095LP4ETR pinout, HMC1095LP4ETR application, or HMC1095LP4ETR equivalent, key selection criteria include its 75 Ω impedance match, DC-coupled RF ports with external ACG capacitors, user-selectable power-up state, serial cascading capability via SEROUT, and operation on single +5 V supply with 2 mA typical IDD.
Technical Context
The HMC1095LP4ETR implements a broadband GaAs-based switched-resistor attenuator architecture with six independently controlled bit cells, enabling precise 0.5 dB incremental steps across 31.5 dB range. Its dual-mode interface supports both 3-wire SPI (SERIN/CLK/LE) and 6-bit parallel (D0–D5) control, with latch-enable synchronization and P/S pin mode selection.
DC operation is enabled by six dedicated AC-ground (ACG1–ACG6) terminals requiring external 10 nF capacitors; RF ports (ATTIN/ATTOUT) are DC-coupled and internally matched to 75 Ω. Power-up state is configurable via D0–D5 or PUP1/PUP2 pins, latching within ~200 ms after VDD application.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | DC – 3 GHz: Enables baseband through UHF signal conditioning without external tuning. |
| Attenuation Range & Resolution | 0.5 dB LSB over 31.5 dB total: Supports fine-grained gain control in CATV channel equalization and level setting. |
| Insertion Loss | 1.3 dB typ. @ 1.0 GHz: Minimizes signal degradation in receive path insertion points. |
| Input IP3 | +57 dBm @ 1.0 GHz: Ensures high linearity in multi-carrier CATV environments with minimal distortion. |
| Switching Speed | 60 ns tRise/tFall: Allows fast AGC loop response in dynamic RF systems. |
| Supply Voltage | +5 V single supply: Simplifies biasing in legacy 5 V CATV hardware designs. |
| Package | 24-lead 4×4 mm QFN (RoHS-compliant): Enables compact, thermally efficient SMT layout with exposed paddle grounding. |
Pinout & Package
Package: 24-lead, 4×4 mm QFN with exposed thermal paddle; RoHS-compliant, MSL1 rated, matte tin-plated copper alloy leads; requires soldering of all ground leads and paddle to PCB RF ground per Hittite land pattern guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P/S) | Parallel/Serial Mode Select | High = serial interface active (SERIN/CLK/LE); Low = parallel interface active (D0–D5). |
| 4 (LE) | Latch Enable | High pulse loads data into attenuator core; synchronizes parallel or serial updates. |
| 6 (ATTIN), 13 (ATTOUT) | RF Input / Output | DC-coupled, 75 Ω matched ports; require external blocking caps if DC blocking needed. |
| 5, 14 (GND) | Ground | RF/DC ground reference; must be connected to PCB ground plane with multiple vias. |
| 7–12 (ACG1–ACG6) | AC Ground Terminals | Each requires external 10 nF capacitor to ground for near-DC operation down to 0 Hz. |
| 15 (SEROUT) | Serial Data Output | 6-clock-cycle delayed copy of SERIN; enables daisy-chaining multiple HMC1095LP4ETR devices. |
| 18 (VDD) | Power Supply | +5 V supply input; 2 mA typical current draw; decoupling required per RF layout best practices. |
| 19–24 (D5–D0) | Parallel Control Inputs | Direct 6-bit binary word; logic state defines attenuation value and power-up state when LE = High at startup. |
Key Features
| Feature | Design Value |
|---|---|
| 0.5 dB LSB resolution with ±0.25 dB typical step error | Enables precise signal leveling in multi-channel CATV headend and set-top box IF stages. |
| User-selectable power-up attenuation state | Configurable via D0–D5 or PUP1/PUP2 pins; eliminates need for host initialization before RF enable. |
| Serial output port (SEROUT) | Supports cascaded control of multiple attenuators using single microcontroller SPI bus. |
| DC–3 GHz operation with 75 Ω system match | Direct compatibility with CATV infrastructure signal paths without impedance transformation. |
| Single +5 V supply, 2 mA typical IDD | Reduces power supply complexity and board space vs. dual-supply alternatives. |
Applications
| CATV Set-Top Box Signal Leveling | CATV Modem Downstream Path |
|---|---|
Use Scenario: Adjusting downstream RF signal amplitude prior to demodulation in satellite/cable STBs to maintain optimal ADC input range. IC Role / Device Role / Timing Role: Digitally programmable RF attenuator placed between tuner output and demodulator input, controlled via microcontroller GPIO or SPI. Use Value: Maintains consistent signal-to-noise ratio across varying cable plant loss; 0.5 dB steps prevent over-attenuation in narrowband QAM channels. |
Use Scenario: Dynamic gain control in DOCSIS 3.0/3.1 cable modems to compensate for upstream noise and downstream tilt. IC Role / Device Role / Timing Role: Fixed-position attenuator in downstream signal chain, reconfigured during boot or firmware update to match network operator profiles. Use Value: 31.5 dB range accommodates wide variation in node output levels; high IP3 prevents intermodulation in dense multi-carrier environments. |
| CATV Headend Channel Equalization | Data Network RF Distribution |
Use Scenario: Per-channel attenuation in optical node RF output stages to flatten composite multichannel spectrum before fiber transmission. IC Role / Device Role / Timing Role: Precision attenuator in analog RF summing stage, programmed via serial interface from central controller. Use Value: ±0.25 dB step accuracy ensures flatness ≤0.5 dB across 88–1002 MHz band; DC coupling avoids low-frequency roll-off in analog EQ circuits. |
Use Scenario: Signal level management in broadband wireless backhaul or distributed antenna system (DAS) RF splitters/combiners. IC Role / Device Role / Timing Role: Programmable loss element in 75 Ω RF distribution network, configured during system calibration. Use Value: 4×4 mm QFN footprint minimizes board area in space-constrained DAS remote units; 24-lead layout supports automated optical inspection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital attenuator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HMC624LP4E | Same 24-lead 4×4 mm QFN package; 0.25 dB LSB, 31.75 dB range; DC–6 GHz; requires +3.3 V supply. | Better resolution and bandwidth, but higher cost and lower voltage tolerance; not drop-in compatible due to supply and control voltage differences. | Select HMC624LP4E only when sub-0.5 dB resolution or >3 GHz coverage is mandatory and 3.3 V supply is available. |
| PE43703 | 50 Ω system; 0.25 dB LSB, 31.75 dB range; DC–6 GHz; SPI-only interface; no SEROUT or PUP configuration. | Designed for 50 Ω test equipment and wireless infrastructure; lacks 75 Ω match and parallel control mode required for CATV. | PE43703 is unsuitable for 75 Ω CATV signal chains; use only in 50 Ω lab or cellular base station applications. |
Compared with HMC1095LP4ETR, HMC624LP4E offers finer resolution and extended bandwidth but demands 3.3 V operation and lacks native 75 Ω support, while PE43703 provides higher integration in 50 Ω systems but omits critical CATV features like PUP state selection and SEROUT cascading.
Availability
HMC1095LP4ETR is available at Aetrix Electronics and suitable for CATV infrastructure, satellite set-top boxes, and data network equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant SMT packaging.
Supply support for HMC1095LP4ETR 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
Analog Devices acquired Hittite Microwave in 2014 and maintains its high-performance RF/Microwave product lines, including GaAs MMICs for communications infrastructure.
The HMC1095LP4ETR belongs to Hittite's broadband digital attenuator family, designed specifically for 75 Ω CATV and satellite video distribution systems requiring DC-coupled, low-distortion, digitally programmable RF attenuation.
FAQ
What is the minimum operating frequency of the HMC1095LP4ETR?
The HMC1095LP4ETR operates from DC (0 Hz) to 3 GHz. Its six AC-ground (ACG1–ACG6) terminals, when fitted with external 10 nF capacitors, enable true near-DC functionality - essential for baseband and IF signal conditioning in CATV applications where low-frequency response is critical.
Does the HMC1095LP4ETR require external matching components?
No, the HMC1095LP4ETR requires no external matching components. Its RF ports (ATTIN and ATTOUT) are internally matched to 75 Ω across DC–3 GHz. However, external 10 nF capacitors are mandatory on ACG1–ACG6 pins for DC operation, and blocking capacitors may be added on ATTIN/ATTOUT if DC blocking is needed.
How is the power-up state configured on the HMC1095LP4ETR?
The HMC1095LP4ETR power-up state is selected via either D0–D5 pins (when LE is high at power-on) or PUP1/PUP2 pins (when LE is low at power-on), per the documented truth table. The selected state latches approximately 200 ms after VDD application and remains stable until reprogrammed.
Can multiple HMC1095LP4ETR devices be controlled using a single SPI bus?
Yes - the HMC1095LP4ETR includes a SEROUT pin that outputs the serial input data delayed by six clock cycles, enabling daisy-chained SPI configuration. This allows one microcontroller to program multiple HMC1095LP4ETR devices sequentially without additional chip-select lines or GPIO overhead.
What is the absolute maximum RF input power rating for the HMC1095LP4ETR?
The absolute maximum RF input power for the HMC1095LP4ETR is +28 dBm at +85 °C ambient temperature. At 25 °C, the 1 dB compression point is +31 dBm (DC–1.0 GHz), and the device maintains +57 dBm input IP3 under the same conditions - confirming robust linearity well below absolute max limits.
HMC1095LP4ETR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 24-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Attenuation Value:
- 31.5dB
- Frequency Range:
- 0 Hz ~ 3 GHz
- Power (Watts):
- -
- Impedance:
- 75 Ohms
- Grade:
- -
- Qualification:
- -
HMC1095LP4ETR FAQ
1.How can I place an order for HMC1095LP4ETR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC1095LP4ETR 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 HMC1095LP4ETR reliable?
The price and inventory of HMC1095LP4ETR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC1095LP4ETR is usually 5 days.
3.What payment methods are accepted for HMC1095LP4ETR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC1095LP4ETR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC1095LP4ETR?
HMC1095LP4ETR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC1095LP4ETR 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 HMC1095LP4ETR?
For technical support, including HMC1095LP4ETR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC1095LP4ETR requirements.
6.How does Aetrix verify that HMC1095LP4ETR is sourced from the original manufacturer or authorized distributors?
All HMC1095LP4ETR 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 HMC1095LP4ETR meets industry standards.
7.What is the process for return or replacement of HMC1095LP4ETR?
All HMC1095LP4ETR units undergo pre-shipment inspection (PSI). If there is an issue with HMC1095LP4ETR, 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 HMC1095LP4ETR part is unused and in its original packaging.
Return procedure for HMC1095LP4ETR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC1095LP4ETR Tags
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PAT0510S-C-3DB-T10
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PAT0510S-C-10DB-T10
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PAT0510S-C-2DB-T10
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PAT1220-C-10DB-T5
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PAT1220-C-6DB-T5
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PAT1220-C-0DB-T5
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PAT1220-C-3DB-T5
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PAT1220-C-5DB-T5
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PAT1220-C-8DB-T5
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MACOM Technology Solutions
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MAATSS0018TR-3000
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