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Analog Devices Inc. AD9433BSQ-105
- Part No.:
- AD9433BSQ-105
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-LQFP Exposed Pad
- Datasheet:
-
AD9433BSQ-105.pdf
- Description:
- IC ADC 12BIT 105MSPS 52-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:504
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Product details
Overview
AD9433BSQ-105 from Analog Devices is a 12-bit, 105 MSPS IF sampling analog-to-digital converter optimized for cellular infrastructure and wireless broadband receivers. It delivers 67.5 dB SNR at 70 MHz input, 83 dBc SFDR (dc–70 MHz), 750 MHz full-power analog bandwidth, and operates from 5 V analog / 3.3 V digital supplies in industrial temperature range (−40°C to +85°C).
For engineers reviewing the AD9433BSQ-105 datasheet, AD9433BSQ-105 pinout, AD9433BSQ-105 application, or AD9433BSQ-105 equivalent, this page provides verified technical context, real-world performance boundaries, package-specific layout guidance, and validated alternative options for IF-sampling receiver designs requiring high dynamic range up to 350 MHz.
Technical Context
The AD9433BSQ-105 implements a pipeline ADC architecture with on-chip track-and-hold, internal 2.5 V reference, and duty-cycle stabilization circuitry. It supports differential PECL-compatible encode clock inputs and offers user-selectable offset binary or twos complement output formatting with overrange (OR) flag.
Its SFDR optimization circuit-enabled via SFDR MODE pin-dynamically adjusts internal biasing to suppress discrete spurs, delivering up to 83 dBc SFDR at 70 MHz while maintaining 67.5 dB SNR; performance degrades predictably beyond 150 MHz (e.g., 72 dBc SFDR at 150 MHz, 65.4 dB SNR).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees 4096 distinct output codes with guaranteed no missing codes across full operating range. |
| Sampling Rate | 105 MSPS - fixed maximum conversion rate for this variant; enables Nyquist zone coverage up to 52.5 MHz baseband or IF sampling of signals up to 350 MHz. |
| SNR @ fIN = 70 MHz | 67.5 dB - measured at −0.5 dBFS input; defines usable dynamic range for wideband IF digitization in 3G multicarrier systems. |
| SFDR @ fIN = 70 MHz | 83 dBc - achieved with SFDR MODE = 5 V; critical for detecting low-level signals adjacent to strong interferers in LMDS/MMDS base stations. |
| Analog Input Range | 2 V p-p differential - requires matched 100 Ω termination; sets full-scale voltage swing for optimal ENOB (10.9 bits at 70 MHz). |
| Power Dissipation | 1.35 W typical at 125 MSPS - includes 5 V analog (270 mA) and 3.3 V digital (16 mA) supply currents; thermal design must accommodate θJA = 16°C/W (1 m/s airflow). |
| Full-Power Bandwidth | 750 MHz - ensures minimal amplitude roll-off and phase distortion for IF inputs up to 350 MHz (0.47 × fBW). |
Pinout & Package
AD9433BSQ-105 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 for thermal reliability and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 2,5,6,10,36,37,44,47,52) | Analog power supply | 5 V ±2.5% input; decoupling required per pin with 0.1 μF ceramic + bulk capacitor; shared among analog core, T/H, and reference. |
| VDD (Pins 13,22,23,32) | Digital output supply | 3.3 V operation only; supports TTL/CMOS interfacing to FPGA/ASIC; separate from analog ground (DGND pins 12,21,24,31). |
| AIN / AIN (Pins 49/50) | Differential analog input | 2 V p-p full-scale range; 4 kΩ input resistance, 4 pF capacitance; requires 100 Ω differential termination and common-mode bias at 4.0 V. |
| ENCODE / ENCODE (Pins 7/8) | Differential clock input | PECL-compatible; samples on rising edge of ENCODE; min pulse width 2.9 ns (105 MSPS); internal bias at 3.75 V. |
| D11–D0 (Pins 15–20,25–30) | Parallel digital outputs | 12-bit parallel CMOS/TTL; output format selectable via DFS pin; OR signal (Pin 14) flags overrange condition. |
| SFDR MODE (Pin 42) | Spur suppression control | Logic high enables proprietary SFDR optimization circuit; improves spur suppression by up to 11 dBc at 70 MHz but slightly reduces SNR. |
Key Features
| Feature | Design Value |
|---|---|
| IF sampling up to 350 MHz | Validated 750 MHz analog bandwidth enables direct digitization of high-IF signals without image-reject filtering in 3G/LMDS receivers. |
| On-chip reference and T/H | Eliminates need for external reference buffer or driver ICs; reduces BOM count and layout complexity in compact RF front ends. |
| User-selectable output format | DFS pin toggles between offset binary (default) and twos complement, simplifying integration with DSP/FPGA data paths. |
| On-chip clock duty cycle stabilization | Compensates for encode clock asymmetry, maintaining aperture jitter ≤0.25 ps rms even with 40–60% duty cycle variation. |
| Pin-compatible with AD9432 | Same 52-lead TQFP_EP footprint and pin mapping allows drop-in upgrade from 80/105 MSPS AD9432 in existing designs. |
Applications
| Cellular Infrastructure Receiver | LMDS/MMDS Base Station |
|---|---|
Use Scenario: Digitizing 70 MHz IF output from quadrature downconverter in 3G multicarrier BTS. IC Role / Device Role / Timing Role: High-speed IF sampling ADC capturing 4× WCDMA carriers simultaneously with <1 LSB DNL error. Use Value: 83 dBc SFDR prevents adjacent-channel interference masking weak users; 67.5 dB SNR supports >10-bit ENOB across full 20 MHz channel bandwidth. | Use Scenario: Sampling 150 MHz IF in point-to-multipoint wireless broadband access node. IC Role / Device Role / Timing Role: Wideband ADC enabling single-chip digitization of 112 MHz LMDS channel with minimal external filtering. Use Value: 72 dBc SFDR at 150 MHz and 750 MHz analog BW allow direct IF sampling without image-reject mixers, reducing system cost and size. |
| Radar Ground System | Cable Reverse Path Monitor |
Use Scenario: Capturing pulsed L-band radar returns (1–2 GHz IF) in satellite ground station digitizer. IC Role / Device Role / Timing Role: High-fidelity IF ADC providing time-domain fidelity for pulse compression and Doppler analysis. Use Value: 0.25 ps rms aperture jitter ensures sub-ns timing resolution; 65.4 dB SNR at 250 MHz preserves target detection SNR in clutter-limited environments. | Use Scenario: Monitoring upstream spectrum (5–42 MHz) in HFC cable headend for ingress and noise detection. IC Role / Device Role / Timing Role: Low-noise ADC feeding FFT-based spectral analyzer with real-time 105 MSPS capture. Use Value: 67.5 dB SNR and −87 dBc worst spur enable detection of −70 dBm ingress signals amid strong downstream carriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar IF sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9433BSV-125 | Higher 125 MSPS sampling rate; identical pinout, package, and feature set; 1.5 W typical power vs. 1.35 W. | Supports wider Nyquist zones (up to 62.5 MHz baseband) and higher IF frequencies (e.g., 250 MHz) with maintained SFDR. | Select when system requires >105 MSPS throughput or improved ENOB at 125 MSPS (10.9 bits @ 49 MHz vs. 10.7 bits for BSQ-105). |
| AD9432BSQ-105 | Same 52-lead TQFP_EP package and pin compatibility; lower 105 MSPS max rate; 65 dB SNR @ 70 MHz (vs. 67.5 dB); no SFDR optimization circuit. | Lacks SFDR MODE pin and proprietary spur suppression; suitable for cost-sensitive applications where 83 dBc SFDR is not required. | Choose for legacy AD9432 drop-in replacement where SNR ≥65 dB suffices and SFDR >80 dBc is unnecessary. |
Compared with AD9433BSQ-105, the AD9433BSV-125 extends sampling capability for wider instantaneous bandwidth, while the AD9432BSQ-105 trades 2.5 dB SNR and SFDR optimization for lower cost and proven maturity-making all three viable depending on whether priority lies in dynamic range, speed, or BOM cost.
Availability
AD9433BSQ-105 is available at Aetrix Electronics and suitable for cellular infrastructure, LMDS base stations, radar ground systems, and cable reverse path monitoring requiring stable component supply and long-term industrial temperature support.
Supply support for AD9433BSQ-105 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, serving communications, industrial, and aerospace markets since 1965.
The AD9433 belongs to Analog Devices' high-speed IF sampling ADC product line, designed specifically for wireless infrastructure receivers demanding high SFDR, wide analog bandwidth, and integrated signal conditioning to simplify RF front-end design.
FAQ
What is the maximum analog input frequency supported by the AD9433BSQ-105?
The AD9433BSQ-105 supports analog input frequencies up to 350 MHz, validated by its 750 MHz full-power analog bandwidth and measured SFDR performance at 350.3 MHz (61 dBFS SFDR). This enables direct IF sampling in cellular, LMDS, and radar systems without requiring image-reject filtering prior to digitization, provided the input signal remains within the device's specified common-mode voltage (4.0 V) and 2 V p-p differential range.
Does the AD9433BSQ-105 require an external reference voltage?
No, the AD9433BSQ-105 includes an on-chip 2.5 V reference (VREFOUT, Pin 46) with ±80 ppm/°C drift and 100 μA output current, eliminating the need for external reference components in most applications. VREFIN (Pin 45) can accept an external 2.5 V reference if higher precision or lower noise is required, but the internal reference is sufficient for standard IF sampling use cases such as 3G multicarrier receivers.
How does the SFDR MODE pin affect performance of the AD9433BSQ-105?
When SFDR MODE (Pin 42) is pulled high (5 V), the AD9433BSQ-105 activates its proprietary SFDR optimization circuit, improving spurious-free dynamic range by up to 11 dBc (e.g., 83 dBc at 70 MHz) at the expense of ~0.5 dB SNR reduction. When grounded, the ADC operates in standard mode with higher SNR (67.5 dB) but lower SFDR (72 dBc at 70 MHz), making the pin a deliberate trade-off knob for system-level spur vs. noise sensitivity.
What is the recommended power supply decoupling for the AD9433BSQ-105?
Each VCC pin (5 V analog) and VDD pin (3.3 V digital) of the AD9433BSQ-105 requires local 0.1 μF ceramic decoupling to ground, placed within 2 mm of the pin. Bulk capacitance (e.g., 10 μF tantalum) should be distributed near the package edge. The exposed thermal pad must be soldered to a solid ground plane to ensure thermal stability and minimize ground bounce during high-speed switching of all 12 digital outputs.
Is the AD9433BSQ-105 pin-compatible with other members of the AD943x family?
Yes, the AD9433BSQ-105 is pin-compatible with the AD9432BSQ-105, sharing identical 52-lead TQFP_EP package dimensions, pin numbering, and function mapping-including VCC/VDD separation, differential AIN/ENCODE, and SFDR MODE/DFS control pins-enabling direct PCB replacement without layout changes. It is not pin-compatible with AD9433 variants in different packages (e.g., LQFP).
AD9433BSQ-105 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-LQFP Exposed Pad
- Packaging:
- Bag
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 105M
- 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:
- -
AD9433BSQ-105 FAQ
1.How can I place an order for AD9433BSQ-105 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9433BSQ-105 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 AD9433BSQ-105 reliable?
The price and inventory of AD9433BSQ-105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9433BSQ-105 is usually 5 days.
3.What payment methods are accepted for AD9433BSQ-105?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9433BSQ-105 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9433BSQ-105?
AD9433BSQ-105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9433BSQ-105 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 AD9433BSQ-105?
For technical support, including AD9433BSQ-105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9433BSQ-105 requirements.
6.How does Aetrix verify that AD9433BSQ-105 is sourced from the original manufacturer or authorized distributors?
All AD9433BSQ-105 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 AD9433BSQ-105 meets industry standards.
7.What is the process for return or replacement of AD9433BSQ-105?
All AD9433BSQ-105 units undergo pre-shipment inspection (PSI). If there is an issue with AD9433BSQ-105, 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 AD9433BSQ-105 part is unused and in its original packaging.
Return procedure for AD9433BSQ-105:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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