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Analog Devices Inc. AD608AR-REEL
- Part No.:
- AD608AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Mixers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD608AR-REEL.pdf
- Description:
- IC MIXER 500MHZ DOWN CONV 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,217
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Product details
Overview
AD608AR-REEL from Analog Devices is a monolithic 3 V IF subsystem integrating a low-power doubly balanced mixer, logarithmic/limiting amplifier, and high-speed RSSI with 80 dB dynamic range. It delivers 24 dB mixer conversion gain, −5 dBm IP3, ±3° phase stability over 80 dB input range, and 400 mV p-p hard-limited output - optimized for battery-powered PHS/GSM receivers and base station RSSI measurement.
For engineers reviewing the AD608AR-REEL datasheet, AD608AR-REEL pinout, AD608AR-REEL application, or AD608AR-REEL equivalent, this device supports rapid RF-to-IF signal conditioning with integrated gain control, amplitude detection, and power-down (200 ns enable/disable) in a single 16-lead SOIC package - critical for compact, low-power wireless receiver designs.
Technical Context
The AD608AR-REEL implements a successive-detection logarithmic architecture with seven full-wave rectifier cells and five 16 dB IF amplifier stages, enabling precise RSSI generation across −75 dBm to +5 dBm with ±1 dB conformance. Its mixer uses a modified Gilbert-cell topology with on-chip LO preamplifier requiring only −16 dBm drive and operates linearly up to −15 dBm RF input.
Signal path integration includes a two-pole postdemodulation LPF for RSSI (2 MHz cutoff), automatic offset-null feedback via FDBK pin, and dual supply rails (VPS1/VPS2) supporting 2.7 V–5.5 V operation. The limiter provides >110 dB gain, 11 ns transition times, and stable 400 mV p-p output into 5 kΩ with <±3° phase variation at 10.7 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Mixer Conversion Gain | 24 dB typical at 10.7 MHz with 330 Ω parallel-terminated filter - enables direct interface to standard IF band-pass filters without external gain staging. |
| RSSI Dynamic Range | 80 dB (−75 dBm to +5 dBm) with ±1 dB logarithmic conformance - supports accurate received signal strength quantification across cellular and PHS signal levels. |
| Limiter Output | 400 mV p-p into 5 kΩ load with ±3° phase stability - delivers clean, jitter-controlled hard-limited IF for demodulator clock recovery or FM detection. |
| Power Consumption | 21 mW at 3 V (7.3 mA), reduced to 300 μW in CMOS power-down mode - meets stringent battery life requirements in portable instrumentation. |
| RF/LO Bandwidth | >500 MHz - accommodates SAW-filtered 240 MHz RF inputs downconverted to 10.7 MHz IF with minimal insertion loss. |
| Enable/Disable Time | 200 ns power-up response, 400 ns to 200 μA standby current - allows fast duty-cycled operation in TDMA burst-mode receivers. |
| Input IP3 | −5 dBm at 240 MHz - ensures robust linearity against adjacent-channel interference in dense RF environments. |
Pinout & Package
AD608AR-REEL is housed in a 16-lead plastic SOIC_N (R-16) package per JEDEC MS-012-AC, with 1.27 mm pitch and 10.0 mm × 4.0 mm body dimensions. Thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPS1, VPS2 | Positive supply inputs | Separate rails for mixer (VPS1) and limiter/RSSI (VPS2); support 2.7 V–5.5 V operation with independent biasing. |
| PRUP | CMOS logic enable input | Active-high control with 1.5 V threshold; initiates 200 ns power-up sequence to full functionality. |
| RFHI / RFLO | Differential RF input | High-impedance differential port (1.9 kΩ || 3 pF at 100 MHz); accepts −95 dBm to −15 dBm signals with linear mixer operation. |
| LOHI | Single-ended LO input | Accepts −16 dBm LO drive; internal preamp eliminates need for external LO buffer in most IF architectures. |
| MXOP | Mixer output | Current-output node designed for reverse termination into 330 Ω IF filter; delivers ±891 mV swing into 165 Ω load. |
| IFHI / IFLO | Differential IF input to log/limiter | Drives 5-stage IF amplifier (30 MHz BW); accepts −75 dBm to +15 dBm signals with 10 kΩ || 3 pF input impedance. |
| RSSI | RSSI voltage output | Analog DC voltage (0.2 V–1.8 V, 20 mV/dB slope) scaled to supply voltage - directly compatible with ADC reference rails. |
| LMOP | Limiter output | Hard-limited 400 mV p-p signal with 11 ns rise/fall times; drives 5 kΩ load with 200 Ω source impedance. |
| FDBK | Offset-null feedback output | Delivers 50 µA pulses to external π-network (C1/R4/C5) for sub-microvolt input offset cancellation across temperature. |
| VMID | Midsupply bias output | Provides VPOS/2 reference for IF amplifier biasing; decoupling required to maintain stability in high-gain log path. |
Key Features
| Feature | Design Value |
|---|---|
| Doubly balanced mixer with integrated LO preamp | Eliminates external LO buffer; −16 dBm drive requirement reduces system component count and board space. |
| Successive-detection logarithmic architecture | Seven full-wave rectifier cells ensure monotonic RSSI response and ±1 dB accuracy across 80 dB input range. |
| Auto-zero offset feedback loop | Sub-microvolt input offset nulling via FDBK pin prevents saturation in >110 dB gain limiter path under dc-coupled conditions. |
| Supply-proportional RSSI scaling | RSSI slope (mV/dB) tracks VPOS - enables ratiometric ADC conversion without separate voltage reference, reducing BOM cost. |
| Fast CMOS power-down | Reduces supply current from 7.3 mA to 100 μA in 400 ns - essential for time-division duplex (TDD) and burst-mode receiver applications. |
Applications
| PHS/GSM Receiver Front-End | Battery-Powered RSSI Instrumentation |
|---|---|
Use Scenario: Downconverting 240 MHz RF from SAW filter to 10.7 MHz IF in handheld PHS transceivers. IC Role / Device Role / Timing Role: Mixer + log/limiter + RSSI subsystem performing RF-to-IF translation, amplitude detection, and signal strength reporting. Use Value: 24 dB conversion gain and −5 dBm IP3 maintain SNR in crowded 1.9 GHz bands; 80 dB RSSI range enables precise AGC control. |
Use Scenario: Portable field-strength meter measuring RF signal level across 450 kHz–30 MHz IF bandwidth. IC Role / Device Role / Timing Role: Single-chip IF conditioning and amplitude-to-voltage conversion for handheld test equipment. Use Value: 21 mW power consumption extends battery life; 0.2 V–1.8 V RSSI output interfaces directly with low-voltage microcontroller ADCs. |
| Base Station Signal Monitoring | Narrowband FM Demodulator Interface |
Use Scenario: Real-time RSSI monitoring of uplink channels in GSM base station transceivers. IC Role / Device Role / Timing Role: High-accuracy RSSI generator feeding digital signal processor for channel quality assessment. Use Value: ±3° phase stability over 80 dB ensures consistent demodulator timing; 200 ns RSSI response supports fast fading compensation. |
Use Scenario: Driving ceramic discriminator in 455 kHz IF FM radio receivers with external low-pass filtering. IC Role / Device Role / Timing Role: IF amplifier and limiter providing clean 400 mV p-p signal to discriminator input. Use Value: 110 dB limiting gain and 11 ns transitions preserve FM signal integrity; external π-network enables stable offset nulling at low IF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar IF subsystem applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2623EUA+ | Integrated VCO + PLL; no RSSI or limiter; 2.7 V–5.5 V; 240 MHz max RF frequency | Targeted at local oscillator synthesis, not IF signal conditioning or amplitude measurement | Select MAX2623EUA+ only when synthesizer functionality is required - not a functional substitute for AD608AR-REEL's RSSI/log/limiter chain. |
| LT5534IS6#TRMPBF | RF log detector (no mixer/limiter); 10 MHz–1 GHz; 60 dB range; 3.3 V operation; 12 dBm max input | Replaces only RSSI function; requires external mixer and limiting stage for full AD608AR-REEL capability | Choose LT5534IS6#TRMPBF when only RSSI is needed and system already includes discrete mixer/limiter - adds complexity vs. AD608AR-REEL's integration. |
Compared with MAX2623EUA+ and LT5534IS6#TRMPBF, AD608AR-REEL uniquely integrates mixer, limiter, and RSSI in one die - eliminating interstage matching, reducing PCB area by >40%, and guaranteeing phase-coherent signal paths critical for FM/PM demodulation.
Availability
AD608AR-REEL is available at Aetrix Electronics and suitable for PHS/GSM receiver front-ends, battery-powered RSSI instrumentation, and base station signal monitoring requiring stable component supply and long-term industrial lifecycle support.
Supply support for AD608AR-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD608 belongs to Analog Devices' RF receiver subsystem product line, engineered specifically for low-power, high-dynamic-range IF signal processing in wireless infrastructure and portable communications equipment.
FAQ
What is the operating supply voltage range for the AD608AR-REEL?
The AD608AR-REEL operates from a single 2.7 V to 5.5 V supply across −25°C to +85°C, and from 3.0 V to 5.5 V across −40°C to +85°C. Both VPS1 and VPS2 pins must be biased within this range; the RSSI slope scales linearly with supply voltage, enabling ratiometric ADC interfacing without external references. Typical power consumption is 21 mW at 3 V.
How does the AD608AR-REEL achieve ±1 dB logarithmic conformance over 80 dB?
The AD608AR-REEL achieves ±1 dB logarithmic conformance using a successive-detection architecture with seven full-wave rectifier cells distributed across five 16 dB IF amplifier stages. This design ensures monotonic response from −75 dBm to +5 dBm at 10.7 MHz, with the RSSI output calibrated to 0.2 V at −75 dBm and 1.8 V at +5 dBm - verified across temperature and supply voltage variations.
Can the AD608AR-REEL drive a standard 10.7 MHz ceramic band-pass filter directly?
Yes, the AD608AR-REEL is specifically designed to drive a parallel-terminated 10.7 MHz band-pass filter with 330 Ω impedance. Its MXOP pin sees a 165 Ω effective load, delivering 24 dB conversion gain and ±891 mV output swing. External resistive dividers (e.g., R1 = R2 = 330 Ω) are recommended for optimal termination, as detailed in Figure 24 and Table 6 of the datasheet.
What is the purpose of the FDBK pin on the AD608AR-REEL?
The FDBK pin on the AD608AR-REEL outputs 50 µA current pulses that feed an external π-network (C1/R4/C5) to generate a smoothed DC voltage subtracted from the IF amplifier's inverting input (IFLO). This auto-zero feedback loop nulls input offset to sub-microvolt levels - essential for stability in the >110 dB gain limiter path and preventing saturation during dc-coupled operation.
Does the AD608AR-REEL support IF frequencies other than 10.7 MHz?
Yes, the AD608AR-REEL supports IF frequencies from low frequency (LF) up to 30 MHz. Its logarithmic/limiting amplifier section handles 450 kHz, 455 kHz, 6.5 MHz, and 10.7 MHz IFs - with external low-pass filtering required for sub-MHz IFs (e.g., 90 kHz cutoff for 455 kHz) to suppress ripple. Table 6 provides resistor/capacitor values for offset-null network optimization at each IF.
AD608AR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD608
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- RF Type:
- FM, GSM, PM, PHS, FM
- Frequency:
- 500MHz
- Number of Mixers:
- 1
- Gain:
- 24dB
- Noise Figure:
- 16dB
- Secondary Attributes:
- Down Converter
- Current - Supply:
- 7.3mA
- Voltage - Supply:
- 2.7V ~ 5.5V
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AD608AR-REEL FAQ
1.How can I place an order for AD608AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD608AR-REEL 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 AD608AR-REEL reliable?
The price and inventory of AD608AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD608AR-REEL is usually 5 days.
3.What payment methods are accepted for AD608AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD608AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD608AR-REEL?
AD608AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD608AR-REEL 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 AD608AR-REEL?
For technical support, including AD608AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD608AR-REEL requirements.
6.How does Aetrix verify that AD608AR-REEL is sourced from the original manufacturer or authorized distributors?
All AD608AR-REEL 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 AD608AR-REEL meets industry standards.
7.What is the process for return or replacement of AD608AR-REEL?
All AD608AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD608AR-REEL, 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 AD608AR-REEL part is unused and in its original packaging.
Return procedure for AD608AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD608AR-REEL Tags
-
MAX2671EUT+T
Analog Devices Inc./Maxim Integrated
-
ADEX-10+
Mini-Circuits
-
ADE-2+
Mini-Circuits
-
ADE-1+
Mini-Circuits
-
LT5560EDD#PBF
Analog Devices Inc.
-
LT5560EDD#TRPBF
Analog Devices Inc.
-
LTC5562IUC#TRPBF
Analog Devices Inc.
-
MAX2681EUT+T
Analog Devices Inc./Maxim Integrated
-
ADE-1ASK+
Mini-Circuits
-
ADE-1L+
Mini-Circuits
-
ADL5350ACPZ-R7
Analog Devices Inc.
-
AD608ARZ-RL
Analog Devices Inc.
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