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Analog Devices Inc. AD9433BSQZ-125
- Part No.:
- AD9433BSQZ-125
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-LQFP Exposed Pad
- Datasheet:
-
AD9433BSQZ-125.pdf
- Description:
- IC ADC 12BIT 125MSPS 52LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AD9433BSQZ-125 from Analog Devices is a 12-bit, 125 MSPS analog-to-digital converter optimized for IF sampling up to 350 MHz, featuring 67.7 dB SNR at 125 MSPS with 10.3 MHz input, 72 dBc SFDR at 150 MHz input, 2 Vp-p differential analog input range, and on-chip track-and-hold with internal reference. It serves as the front-end digitizer in wideband wireless infrastructure receivers.
For engineers reviewing the AD9433BSQZ-125 datasheet, AD9433BSQZ-125 pinout, AD9433BSQZ-125 application, or AD9433BSQZ-125 equivalent, key selection criteria include IF bandwidth support (up to 350 MHz), SFDR optimization mode control, dual-supply operation (5 V analog / 3.3 V digital), TQFP_EP thermal performance, and compatibility with WCDMA/LMDS base station signal chains.
Technical Context
The AD9433BSQZ-125 implements a pipeline ADC architecture with integrated track-and-hold and on-chip voltage reference, enabling direct IF sampling without external driver or reference components in many applications. Its encode interface accepts differential PECL-compatible clocks and supports user-selectable offset binary or twos complement output formats.
It features a proprietary SFDR optimization circuit activated via the SFDR MODE pin, delivering up to 83 dBc spurious-free dynamic range from dc to 70 MHz. The device operates across −40°C to +85°C and dissipates 1.35 W typical at 125 MSPS, with 750 MHz full-power analog bandwidth and 0.25 ps rms aperture jitter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete amplitude levels for high-fidelity IF signal capture. |
| Sampling Rate | 125 MSPS - supports Nyquist zone coverage up to 62.5 MHz and undersampling of RF/IF signals up to 350 MHz. |
| SNR | 67.7 dB at fIN = 10.3 MHz, 125 MSPS - enables >11-bit effective resolution for low-noise receiver front ends. |
| SFDR | 72 dBc at fIN = 150 MHz, 125 MSPS (SFDR mode enabled) - critical for multicarrier systems with dense spectral content. |
| Analog Input Range | 2 Vp-p differential - matches standard transformer-coupled IF stages and simplifies signal conditioning. |
| Power Dissipation | 1.35 W typical at 125 MSPS - requires thermal management via exposed pad soldering per JEDEC 4-layer board guidelines. |
| Aperture Jitter | 0.25 ps rms - limits SNR degradation at high input frequencies, supporting >200 MHz IF sampling fidelity. |
| Digital Output Interface | TTL/CMOS-compatible, 2.5 V–3.3 V - interoperable with FPGA I/O banks and ASIC logic without level shifters. |
Pinout & Package
AD9433BSQZ-125 is housed in a 52-lead thin quad flat package with exposed thermal pad (TQFP_EP, SV-52-2), specified for −40°C to +85°C operation. The exposed paddle must be soldered to PCB ground plane to ensure thermal reliability and optimal jitter performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 2,5,6,10,36,37,44,47,52) | Analog supply input | 5 V ±5% supply for analog core; decoupling required near each pin to suppress switching noise. |
| VDD (Pins 13,22,23,32) | Digital output supply | 3.3 V supply for TTL/CMOS outputs; independent from VCC to isolate digital switching noise. |
| AIN / AIN (Pins 49,50) | Differential analog input | Accepts 2 Vp-p differential signal; common-mode voltage fixed at 4.0 V; 750 MHz bandwidth. |
| ENCODE / ENCODE (Pins 7,8) | Differential clock input | PECL-compatible; rising edge triggers sampling; duty cycle stabilization circuit reduces jitter sensitivity. |
| D11–D0 (Pins 14–20,25–30) | Parallel digital output | 12-bit parallel data bus; output format selectable via DFS pin (offset binary or twos complement). |
| SFDR MODE (Pin 42) | Performance mode control | Logic high enables proprietary SFDR optimization circuit; improves spurious suppression at cost of slight SINAD trade-off. |
| OR (Pin 14) | Overrange indicator | Active-high signal flags analog input exceeding full-scale range; used for AGC or clipping detection. |
| Exposed Pad (EP) | Thermal & electrical ground | Must be soldered to solid ground plane; reduces θJA to 16°C/W (1 m/s airflow) and stabilizes reference noise. |
Key Features
| Feature | Design Value |
|---|---|
| IF Sampling up to 350 MHz | Enables direct digitization of cellular, LMDS, and cable reverse-path IF signals without downconversion. |
| User-selectable SFDR optimization | Improves spurious-free dynamic range by up to 11 dBc in critical bands (e.g., 70 MHz), configurable via CMOS pin. |
| On-chip track-and-hold and reference | Eliminates need for external THA or precision reference ICs, reducing BOM count and layout complexity. |
| 52-lead TQFP_EP with exposed pad | Provides low thermal resistance (θJC = 2°C/W) and mechanical robustness for industrial base station environments. |
| Pin-compatible with AD9432 | Allows drop-in upgrade path from 105 MSPS AD9432 in existing designs without PCB revision. |
| Dual-supply operation (5 V / 3.3 V) | Isolates analog and digital domains to maintain SNR integrity while interfacing directly with 3.3 V FPGAs. |
Applications
| Cellular Infrastructure Receiver | LMDS/MMDS Base Station |
|---|---|
|
Use Scenario: Digitizing 70–150 MHz IF signals from multi-carrier 3G/4G transceivers in macrocell BTS. IC Role / Device Role / Timing Role: Primary IF sampling ADC; provides 125 MSPS digitization with SFDR mode enabled for adjacent-channel interference rejection. Use Value: 72 dBc SFDR at 150 MHz input enables simultaneous reception of ≥4 WCDMA carriers without desensitization. |
Use Scenario: Capturing 24–29 GHz microwave IF outputs (e.g., 140 MHz) in point-to-multipoint broadband access units. IC Role / Device Role / Timing Role: High-bandwidth ADC front end; leverages 350 MHz IF capability and 750 MHz analog bandwidth for wide instantaneous capture. Use Value: 67.7 dB SNR at 125 MSPS ensures >11-bit ENOB for high-order QAM demodulation in 64-QAM LMDS links. |
| Cable Reverse Path Monitoring | Radar Ground System Digitizer |
|
Use Scenario: Sampling upstream DOCSIS return-path spectrum (5–42 MHz) in headend analyzers with real-time spectral monitoring. IC Role / Device Role / Timing Role: Wide-dynamic-range ADC; uses on-chip reference and 2 Vp-p input to handle variable upstream power without external gain control. Use Value: ±0.5 LSB INL and ±0.25 LSB DNL ensure accurate amplitude calibration across 40 dB input range for spectral mask compliance testing. |
Use Scenario: Digitizing pulsed L-band radar IF outputs (e.g., 70 MHz) in satellite ground stations requiring high spurious-free resolution. IC Role / Device Role / Timing Role: Low-jitter sampling node; relies on 0.25 ps rms aperture uncertainty to preserve pulse fidelity and Doppler resolution. Use Value: 83 dBc SFDR (dc–70 MHz) suppresses harmonic artifacts that could mask weak target returns in clutter-limited environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed IF sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9433BSVZ-125 | Same silicon, but in 52-lead LFCSP (SV-52-2) package with smaller footprint and lower θJA (12°C/W). | Better thermal performance in space-constrained modules; requires requalification of solder joint reliability under vibration. | Select when board area or thermal density is critical; not drop-in compatible due to different land pattern and thermal pad geometry. |
| AD9434BCPZ-125 | 12-bit, 125 MSPS successor with improved SFDR (78 dBc @ 150 MHz), lower power (1.1 W), and enhanced clock jitter tolerance. | Supports higher-density carrier aggregation in 5G NR baseband; includes JESD204B serial output option. | Choose for new designs targeting lower power and future-proof serial interface; requires FPGA redesign for JESD204B integration. |
Compared with AD9433BSQZ-125, the AD9433BSVZ-125 offers superior thermal dissipation in compact form factors, while the AD9434BCPZ-125 delivers measurable SFDR and power efficiency gains at the cost of architectural divergence-neither is pin-compatible, but both serve overlapping IF sampling use cases with distinct system-level trade-offs.
Availability
AD9433BSQZ-125 is available at Aetrix Electronics and suitable for cellular infrastructure communication systems, LMDS/MMDS base station units, and radar ground systems requiring stable component supply and long-term industrial temperature support.
Supply support for AD9433BSQZ-125 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, headquartered in Norwood, MA.
The AD9433 is part of Analog Devices' high-speed data converter product line, engineered specifically for demanding IF sampling applications in wireless infrastructure, defense, and instrumentation where dynamic range, linearity, and thermal stability are critical.
FAQ
What is the maximum analog input frequency supported by the AD9433BSQZ-125?
The AD9433BSQZ-125 supports IF sampling up to 350 MHz, as confirmed in its General Introduction and Product Highlights sections. This capability is enabled by its 750 MHz full-power analog bandwidth and pipeline architecture optimized for high-frequency signal acquisition. Performance metrics such as SNR and SFDR are characterized up to this frequency, with measured values including 63.7 dB SNR at 250 MHz and 55.3 dB SNR at 350 MHz under 105 MSPS conditions.
Does the AD9433BSQZ-125 require an external reference voltage?
No, the AD9433BSQZ-125 does not require an external reference voltage. It integrates an on-chip reference with a typical output of 2.5 V (VREFOUT, Pin 46), and also accepts an external reference via VREFIN (Pin 45) if higher precision or custom scaling is needed. The datasheet states "No external reference or driver components are required for many applications," and DC specifications confirm internal reference operation across temperature.
How does the SFDR MODE pin affect the performance of the AD9433BSQZ-125?
The SFDR MODE pin (Pin 42) enables a proprietary on-chip circuit that optimizes spurious-free dynamic range. When asserted high, it improves SFDR by up to 11 dBc in the dc–70 MHz band (e.g., 83 dBc vs. 72 dBc at 70 MHz), at the expense of slight SINAD reduction. The datasheet specifies that DNL and INL are tested with SFDR MODE grounded, confirming its role as a functional mode select-not a configuration register-and that performance trade-offs are hardware-defined.
What is the recommended power supply decoupling for the AD9433BSQZ-125?
The AD9433BSQZ-125 requires individual 0.1 μF ceramic capacitors placed as close as possible to each VCC (analog) and VDD (digital) pin, per the Pin Configuration section. VREFIN (Pin 45) must be bypassed with a 0.1 μF capacitor to ground. The exposed thermal pad must be soldered to a solid ground plane to maximize thermal conduction and minimize ground bounce-this is explicitly mandated in Figure 3 notes and Thermal Characteristics.
Is the AD9433BSQZ-125 pin-compatible with other members of the AD943x family?
Yes, the AD9433BSQZ-125 is pin-compatible with the AD9432 12-bit ADC, as stated in Product Highlights: "The AD9433 has the same footprint and pin layout as the AD9432 12-bit 80 MSPS/105 MSPS ADC." This allows direct replacement in existing AD9432-based designs operating up to 105 MSPS, with full benefit of the higher 125 MSPS rate and improved SFDR performance upon firmware or clock update.
AD9433BSQZ-125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 125M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 52-LQFP-PQ4 (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD9433BSQZ-125 FAQ
1.How can I place an order for AD9433BSQZ-125 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9433BSQZ-125 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 AD9433BSQZ-125 reliable?
The price and inventory of AD9433BSQZ-125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9433BSQZ-125 is usually 5 days.
3.What payment methods are accepted for AD9433BSQZ-125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9433BSQZ-125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9433BSQZ-125?
AD9433BSQZ-125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9433BSQZ-125 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 AD9433BSQZ-125?
For technical support, including AD9433BSQZ-125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9433BSQZ-125 requirements.
6.How does Aetrix verify that AD9433BSQZ-125 is sourced from the original manufacturer or authorized distributors?
All AD9433BSQZ-125 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 AD9433BSQZ-125 meets industry standards.
7.What is the process for return or replacement of AD9433BSQZ-125?
All AD9433BSQZ-125 units undergo pre-shipment inspection (PSI). If there is an issue with AD9433BSQZ-125, 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 AD9433BSQZ-125 part is unused and in its original packaging.
Return procedure for AD9433BSQZ-125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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