Initial commit: HMC472A attenuator module reference materials

Datasheet extraction, module specs, marketing photos, and
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datasheet/hmc472a.md

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+# Document Metadata
+**Format:** PDF 1.4
+**Title:** HMC472A (v02.0420)
+**Author:** Analog Devices, Inc.
+**Subject:** 0.5 dB LSB GaAs MMIC 6-Bit Digital Positive Control Attenuator, DC - 3.8 GHz
+**Creator:** Adobe InDesign 14.0 (Windows)
+**Producer:** Adobe PDF Library 15.0
+**Creation Date:** D:20200416094000-04'00'
+**Mod Date:** D:20200416094124-04'00'
+
+---
+
+## Page 1
+
+ATTENUATORS - DIGITAL - SMT
+1
+HMC472ALP4 / 472ALP4E
+v02.0420
+0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
+POSITIVE CONTROL ATTENUATOR, DC - 3.8 GHz
+For price, delivery, and to place orders: Analog Devices, Inc.,
+One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
+Phone: 781-329-4700 • Order online at www.analog.com
+Application Support: Phone: 1-800-ANALOG-D
+Information furnished by Analog Devices is believed to be accurate and reliable. However, no
+responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
+rights of third parties that may result from its use. Specifications subject to change without notice. No
+license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
+Trademarks and registered trademarks are the property of their respective owners.
+Functional Diagram
+Electrical Specifications,
+TA = +25° C, With Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
+The HMC472ALP4E is ideal for:
+• 3G Infrastructure & access points
+• Cellular/3G, LTE & UMB
+• WiMAX, WiBN & Fixed Wireless
+• Test Equipment and Sensors
+• GSM, WCDMA & TD-SCDMA
+0.5 dB LSB Steps to 31.5 dB
+Single Control Line Per Bit
+TTL/CMOS Compatible Control
+± 0.25 dB Typical Step Error
+Single +5V Supply
+24 Lead Ceramic 4x4mm SMT Package: 16mm²
+The HMC472ALP4E are broadband 6-bit GaAs IC
+digital attenuators in low cost leadless surface mount
+packages. This single positive control line per bit
+digital attenuator incorporates off chip AC ground
+capacitors for near DC operation, making it suit­
+able for a wide variety of RF and IF applications.
+Covering DC to 3.8 GHz, the insertion loss is less
+than 2.0 dB typical.  The attenuator bit values are 0.5
+(LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of
+31.5 dB.  Attenuation accuracy is excellent at ± 0.25 dB
+typical step error with an IIP3 of +54 dBm. Six TTL/
+CMOS control inputs are used to select each attenua­
+tion state. A single Vdd bias of +5V is required.
+
+### Electrical Specifications
+
+| Parameter | Frequency (GHz) | Min. | Typ. | Max. | Units |
+|-----------|-----------------|------|------|------|-------|
+| Insertion Loss | DC - 1.5 GHz | | 1.4 | 1.8 | dB |
+| Insertion Loss | 1.5 - 3.0 GHz | | 1.7 | 2.3 | dB |
+| Insertion Loss | 3.0 - 3.8 GHz | | 1.9 | 3 | dB |
+| Attenuation Range | DC - 3.8 GHz | | 31.5 | | dB |
+| Return Loss (RF1 & RF2, All Atten. States) | DC - 3.8 GHz | 20 | | | dB |
+| Attenuation Accuracy (All States) | DC - 1.0 GHz | | ± (0.20 + 3% of Atten. Setting) | | dB |
+| Attenuation Accuracy (0.5 - 3.5 dB States) | 1.0 - 2.2 GHz | | ± (0.25 + 3% of Atten. Setting) | | dB |
+| Attenuation Accuracy (4.0 - 31.5 dB States) | 1.0 - 2.2 GHz | | ± (0.15 + 4% of Atten. Setting) | | dB |
+| Attenuation Accuracy (All States) | 2.2 - 3.0 GHz | | ± (0.30 + 3% of Atten. Setting) | | dB |
+| Attenuation Accuracy (All States) | 3.0 - 3.8 GHz | | ± (0.35 + 5% of Atten. Setting) | | dB |
+| Input Power for 0.1 dB Compression | 0.1 - 3.8 GHz | | 30 | | dBm |
+| Input Third Order Intercept Point (REF - 15.5 dB States) | 0.1 - 3.8 GHz | | 54 | | dBm |
+| Input Third Order Intercept Point (16.0 - 31.5 dB States) | 0.1 - 3.8 GHz | | 49 | | dBm |
+| Switching: tRISE, tFALL (10/90% RF) | DC - 3.8 GHz | | 40 | | ns |
+| Switching: tON, tOFF (50% CTL to 10/90% RF) | DC - 3.8 GHz | | 60 | | ns |
+
+### Typical Applications
+- 3G Infrastructure & access points
+- Cellular/3G, LTE & UMB
+- WiMAX, WiBN & Fixed Wireless
+- Test Equipment and Sensors
+- GSM, WCDMA & TD-SCDMA
+
+### Features
+- 0.5 dB LSB Steps to 31.5 dB
+- Single Control Line Per Bit
+- TTL/CMOS Compatible Control
+- ± 0.25 dB Typical Step Error
+- Single +5V Supply
+- 24 Lead Ceramic 4x4mm SMT Package: 16mm²
+
+---
+
+## Page 2 - Performance Graphs
+
+### Insertion Loss vs Frequency
+![Page 2 - Performance Graphs](page_002.png)
+
+Temperature curves shown for:
+- +25°C
+- +85°C
+- -40°C
+
+### Normalized Attenuation vs Frequency
+Shows attenuation for major states (0.5-16 dB and 31.5 dB)
+
+### Return Loss RF1, RF2 vs Frequency
+Return loss performance across 0-4 GHz range
+
+---
+
+## Page 3 - Bit Error Analysis
+
+### Bit Error vs. Frequency
+Performance curves for different attenuation states:
+- 0.5 - 4 dB states
+- 8 - 31.5 dB states
+
+### Bit Error vs. Attenuation State
+Multiple frequency measurements:
+- 50 MHz
+- 100 MHz, 300 MHz, 350 MHz
+- 200 MHz
+
+### Bit Error vs. Frequency without AC Ground Caps
+Shows behavior when AC ground capacitors are omitted (for reference)
+
+---
+
+## Page 4 - Control Interface
+
+### Worst Case Step Error
+Between successive attenuation states across frequency range (0-4 GHz)
+
+### Relative Phase vs. Frequency
+Phase shift for major attenuation states:
+- 0.5-4 dB
+- 8 dB
+- 16 dB
+- 31.5 dB
+
+### Truth Table
+
+| V1 (16 dB) | V2 (8 dB) | V3 (4 dB) | V4 (2 dB) | V5 (1 dB) | V6 (0.5 dB) | Attenuation State RF1 - RF2 |
+|------------|-----------|-----------|-----------|-----------|-------------|----------------------------|
+| High | High | High | High | High | High | Reference I.L. |
+| High | High | High | High | High | Low | 0.5 dB |
+| High | High | High | High | Low | High | 1 dB |
+| High | High | High | Low | High | High | 2 dB |
+| High | High | Low | High | High | High | 4 dB |
+| High | Low | High | High | High | High | 8 dB |
+| Low | High | High | High | High | High | 16 dB |
+| Low | Low | Low | Low | Low | Low | 31.5 dB |
+
+**Note:** Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected.
+
+### Control Voltage
+
+| State | Bias Condition |
+|-------|----------------|
+| Low | 0 to +0.8 Vdc @ -5 µA Typ. |
+| High | +2.0 to +5.0 Vdc @ 40 µA Typ. |
+
+### Bias Voltage & Current (Vdd = +5V ± 10%)
+
+| Vdd (V) | Idd (Typ.) (mA) |
+|---------|-----------------|
+| +4.5 | 2.4 |
+| +5.0 | 2.5 |
+| +5.5 | 2.6 |
+
+---
+
+## Page 5 - Absolute Maximum Ratings
+
+| Parameter | Value |
+|-----------|-------|
+| RF Input Power (DC - 3 GHz) | +28 dBm (T = +85 °C) |
+| Control Voltage Range (V1 to V6) | -1V to Vdd +1V |
+| Bias Voltage (Vdd) | +7V |
+| Channel Temperature | 150 °C |
+| Continuous Pdiss (T = 85 °C) | 0.56 W (derate 8.6 mW/°C above 85 °C) |
+| Thermal Resistance | 116 °C/W |
+| Storage Temperature | -65 to +150 °C |
+| Operating Temperature | -40 to +85 °C |
+| ESD Sensitivity (HBM) | Class 1A |
+
+⚠️ **ELECTROSTATIC SENSITIVE DEVICE - OBSERVE HANDLING PRECAUTIONS**
+
+### Package Information
+
+| Part Number | Package Body Material | Lead Finish | MSL Rating | Package Marking |
+|-------------|----------------------|-------------|------------|-----------------|
+| HMC472ALP4 | Low Stress Injection Molded Plastic | Sn/Pb Solder | MSL3 [1] | H472A XXXX |
+| HMC472ALP4TR | Low Stress Injection Molded Plastic | Sn/Pb Solder | MSL3 [1] | H472A XXXX |
+| HMC472ALP4E | RoHS-compliant Low Stress Injection Molded Plastic | 100% matte Sn | MSL3 [2] | H472A XXXX |
+| HMC472ALP4ETR | RoHS-compliant Low Stress Injection Molded Plastic | 100% matte Sn | MSL3 [2] | H472A XXXX |
+
+[1] Max peak reflow temperature of 235 °C
+[2] Max peak reflow temperature of 260 °C
+[3] 4-Digit lot number XXXX
+
+### Outline Drawing
+24-Lead Lead Frame Chip Scale Package [LFCSP]
+4 mm × 4 mm Body and 0.85 mm Package Height (CP-24-16)
+
+Package dimensions (mm):
+- Body: 4.00 SQ (3.90-4.10)
+- Height: 0.85 (0.80-0.90)
+- Lead pitch: 0.50 BSC
+- Exposed pad: 2.70 SQ (2.60-2.80)
+
+---
+
+## Page 6 - Pin Descriptions
+
+| Pin Number | Function | Description |
+|------------|----------|-------------|
+| 1, 3, 5, 12, 14, 16, 17, 18 | N/C | These pins should be connected to PCB RF ground to maximize performance. |
+| 2 | Vdd | Supply Voltage. |
+| 4, 15 | RF1, RF2 | This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required. Select value based on lowest frequency of operation. |
+| 6 - 11, 13 | ACG1 - ACG7 | External capacitors to ground are recommended for low and high frequency operation. Select value for lowest frequency of operation. Place capacitor as close to pins as possible. For operation from 700 to 2700 MHz, these pins may be left unconnected. |
+| 19 - 24 | V1 - V6 | See truth table and control voltage table. |
+| GND | Exposed Paddle | Package bottom has an exposed metal paddle that must also be connected to RF/DC Ground. |
+
+---
+
+## Page 7 - Application Circuit
+
+![Application Circuit](page_007.png)
+
+**Note:** For operations from 700 to 2700 MHz, pins 6 through 13 may be left unconnected.
+
+---
+
+## Page 8 - Evaluation PCB
+
+The circuit board used in the application should use RF circuit design techniques. Signal lines should have 50 Ohm impedance while the package ground leads and exposed paddle should be connected directly to the ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board shown is available from Analog Devices, upon request.
+
+### List of Materials for Evaluation PCB 107010 - HMC472ALP4 [1]
+
+| Item | Description |
+|------|-------------|
+| J1 - J2 | PCB Mount SMA Connector |
+| J3 | 14 Pin DC Connector |
+| C1 | 1000 pF Capacitor, 0603 Pkg. |
+| C2, C3 | 1000 pF Capacitor, 0402 Pkg. |
+| C4 - C7 | 330 pF Capacitor, 0402 Pkg. |
+| U1 | HMC472ALP4E Digital Attenuator |
+| PCB [2] | 106977 Evaluation PCB |
+
+[1] Reference this number when ordering complete evaluation PCB
+[2] Circuit Board Material: Rogers 4350

docs/module-specs.md

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+# HMC472A Digital RF Attenuator - Module Specifications
+
+Extracted from Analog Devices HMC472A datasheet for the Amazon module variant.
+
+---
+
+## Electrical Specifications
+
+**Test Conditions:** T_A = +25°C, Vdd = +5V, Vctl = 0/+5V (unless otherwise noted)
+
+![Electrical Specifications Table](electrical-specifications.jpg)
+
+| Parameter | Frequency | Min | Typ | Max | Units |
+|-----------|-----------|-----|-----|-----|-------|
+| **Insertion Loss** | DC - 1.5 GHz | — | 1.4 | 1.8 | dB |
+| | 1.5 - 3.0 GHz | — | 1.7 | 2.3 | dB |
+| | 3.0 - 3.8 GHz | — | 1.9 | 3.0 | dB |
+| **Attenuation Range** | DC - 3.8 GHz | — | 31.5 | — | dB |
+| **Return Loss** (RF1 & RF2, All States) | DC - 3.8 GHz | — | 20 | — | dB |
+
+### Attenuation Accuracy
+
+Referenced to insertion loss:
+
+| Attenuation States | Frequency | Max Error |
+|--------------------|-----------|-----------|
+| All States | DC - 1.0 GHz | ±(0.20 + 3% of Setting) dB |
+| 0.5 - 3.5 dB States | 1.0 - 2.2 GHz | ±(0.15 + 4% of Setting) dB |
+| 4.0 - 31.5 dB States | 2.2 - 3.0 GHz | ±(0.30 + 3% of Setting) dB |
+| All States | 3.0 - 3.8 GHz | ±(0.35 + 5% of Setting) dB |
+
+### Power Handling & Linearity
+
+| Parameter | Frequency | Value | Units |
+|-----------|-----------|-------|-------|
+| Input Power for 0.1 dB Compression | 0.1 - 3.8 GHz | 30 | dBm |
+| **IIP3** (Two-Tone, 0 dBm each) | | | |
+| — REF to 15.5 dB States | 0.1 - 3.8 GHz | 54 | dBm |
+| — 16.0 to 31.5 dB States | 0.1 - 3.8 GHz | 49 | dBm |
+
+### Switching Characteristics
+
+| Parameter | Frequency | Typical | Units |
+|-----------|-----------|---------|-------|
+| t_RISE, t_FALL (10/90% RF) | DC - 3.8 GHz | 40 | ns |
+| t_ON, t_OFF (50% CTL to 10/90% RF) | DC - 3.8 GHz | 60 | ns |
+
+---
+
+## Bias Voltage & Current
+
+**Supply:** Vdd = +5V ± 10%
+
+![Bias and Control Voltage Tables](bias-voltage-current-control-voltage-truth-table.jpg)
+
+| Vdd (V) | Idd Typical (mA) |
+|---------|------------------|
+| +4.5 | 2.4 |
+| +5.0 | 2.5 |
+| +5.5 | 2.6 |
+
+---
+
+## Control Voltage States
+
+| State | Bias Condition |
+|-------|----------------|
+| **Low** | 0 to +0.8 Vdc @ -5 µA Typ. |
+| **High** | +2.0 to +5.0 Vdc @ 40 µA Typ. |
+
+> **Note:** Vdd = +5V
+
+---
+
+## Truth Table
+
+Each control pin (V1-V6) contributes a specific attenuation value when set **Low**:
+
+| Pin | Attenuation Value |
+|-----|-------------------|
+| V1 | 16 dB |
+| V2 | 8 dB |
+| V3 | 4 dB |
+| V4 | 2 dB |
+| V5 | 1 dB |
+| V6 | 0.5 dB |
+
+### Example Attenuation States
+
+| V1 (16dB) | V2 (8dB) | V3 (4dB) | V4 (2dB) | V5 (1dB) | V6 (0.5dB) | Total Attenuation |
+|-----------|----------|----------|----------|----------|------------|-------------------|
+| High | High | High | High | High | High | Reference (I.L.) |
+| High | High | High | High | High | Low | 0.5 dB |
+| High | High | High | High | Low | High | 1 dB |
+| High | High | High | Low | High | High | 2 dB |
+| High | High | Low | High | High | High | 4 dB |
+| High | Low | High | High | High | High | 8 dB |
+| Low | High | High | High | High | High | 16 dB |
+| Low | Low | Low | Low | Low | Low | 31.5 dB |
+
+> **Note:** Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected.
+
+---
+
+## Functional Diagram & Pinout
+
+![Functional Diagram and Application Circuit](functional-diagram-application-circuit.jpg)
+
+### Pin Assignment (24-Pin QFN, Top View)
+
+| Pin | Function | Pin | Function |
+|-----|----------|-----|----------|
+| 1 | N/C | 13 | ACG7 |
+| 2 | VDD | 14 | N/C |
+| 3 | N/C | 15 | RF2 |
+| 4 | RF1 | 16 | N/C |
+| 5 | N/C | 17 | N/C |
+| 6 | ACG1 | 18 | N/C |
+| 7 | ACG2 | 19 | V1 (16 dB) |
+| 8 | ACG3 | 20 | V2 (8 dB) |
+| 9 | ACG4 | 21 | V3 (4 dB) |
+| 10 | ACG5 | 22 | V4 (2 dB) |
+| 11 | ACG6 | 23 | V5 (1 dB) |
+| 12 | N/C | 24 | V6 (0.5 dB) |
+| **Base** | **GND** | | |
+
+---
+
+## Application Circuit
+
+### Recommended Component Values
+
+| Reference | Value | Function |
+|-----------|-------|----------|
+| C1 | 1000 pF | VDD bypass capacitor |
+| C2 | 1000 pF | RF1 DC blocking / coupling |
+| C3 | 1000 pF | RF2 DC blocking / coupling |
+| C4-C8 | 330 pF | ACG2-ACG6 bypass capacitors |
+| C9 | 330 pF | ACG7 bypass capacitor |
+
+### Circuit Notes
+
+- **VDD** (pin 2) requires 1000 pF bypass to ground
+- **RF1** (pin 4) and **RF2** (pin 15) use 1000 pF DC blocking capacitors for AC coupling
+- **ACG pins** (ACG2-ACG6 on pins 7-11, ACG7 on pin 13) require 330 pF bypass capacitors to ground
+
+> **Note:** For operations from 700 MHz to 2700 MHz, pins 6 through 13 (ACG1-ACG7) may be left unconnected.
+
+---
+
+## Performance Graphs
+
+![Insertion Loss and Return Loss Graphs](insertion-and-return-loss-graphs.jpg)
+
+### Insertion Loss vs Frequency
+
+Two graphs showing insertion loss across temperature (+25°C, +85°C, -40°C):
+
+1. **Low Frequency Range (DC - 350 MHz)**
+   - Insertion loss approximately 1.0 to 1.2 dB
+   - Minimal temperature variation
+
+2. **Full Frequency Range (DC - 4 GHz)**
+   - Insertion loss increases from ~1.2 dB at low frequencies to ~2.0 dB at 4 GHz
+   - Temperature variation more pronounced at higher frequencies
+   - -40°C shows best performance, +85°C shows highest loss
+
+### Return Loss RF1 & RF2
+
+Two graphs showing return loss for major attenuation states:
+
+1. **Low Frequency Range (DC - 350 MHz)**
+   - Return loss typically better than -15 dB across all states
+   - Best performance around 100 MHz
+
+2. **Full Frequency Range (DC - 4 GHz)**
+   - Reference and low attenuation states (0.5-16 dB): -15 to -25 dB return loss
+   - Maximum attenuation state (31.5 dB): return loss degrades above 2 GHz
+   - All states maintain better than -10 dB return loss across band
+
+---
+
+## Quick Reference Summary
+
+| Specification | Value |
+|---------------|-------|
+| Frequency Range | DC - 3.8 GHz |
+| Attenuation Range | 0 - 31.5 dB |
+| Step Size | 0.5 dB |
+| Insertion Loss (typ) | 1.4 - 1.9 dB |
+| Return Loss (typ) | 20 dB |
+| IIP3 | 49 - 54 dBm |
+| Supply Voltage | +5V ± 10% |
+| Supply Current | 2.5 mA typ |
+| Switching Speed | 40 - 60 ns |
+| Package | 24-pin QFN |
+| Input/Output Impedance | 50Ω |