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Analog Devices Inc. AD9433BSQ-125
- Part No.:
- AD9433BSQ-125
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-LQFP Exposed Pad
- Datasheet:
-
AD9433BSQ-125.pdf
- Description:
- IC ADC 12BIT 125MSPS IF 52-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,056
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Product details
Overview
AD9433BSQ-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 49.3 MHz input and 72 dBc SFDR at 150 MHz - all with 2 Vp-p differential analog input range and on-chip track-and-hold. It serves as the front-end digitizer in wideband cellular infrastructure receivers, LMDS base stations, and radar ground systems.
For engineers reviewing the AD9433BSQ-125 datasheet, AD9433BSQ-125 pinout, AD9433BSQ-125 application, or AD9433BSQ-125 equivalent, key selection criteria include its 750 MHz full-power analog bandwidth, SFDR optimization mode (SFDR MODE pin), dual-supply operation (5 V analog / 3.3 V digital), and TQFP_EP package thermal performance under industrial temperature conditions.
Technical Context
The AD9433BSQ-125 implements a pipeline ADC architecture with integrated track-and-hold and on-chip 2.5 V reference. Its encode interface accepts differential PECL-compatible clock inputs, and aperture jitter is specified at 0.25 ps rms - critical for high-frequency IF sampling fidelity.
It supports user-selectable output coding (twos complement or offset binary via DFS pin) and includes an overrange (OR) flag. The SFDR MODE pin enables a proprietary circuit that improves spurious-free dynamic range by up to 11 dBc in the DC–70 MHz band, trading off SINAD for cleaner spectral performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise amplitude quantization in wideband signal capture. |
| Max Sampling Rate | 125 MSPS - supports Nyquist zones up to 62.5 MHz baseband or direct IF sampling of 150+ MHz carriers. |
| SNR @ 49.3 MHz | 67.7 dB (typical) - enables >11-bit effective resolution for WCDMA and multicarrier 3G signals. |
| SFDR @ 150 MHz | 72 dBc (typical) - suppresses spurious content critical for adjacent-channel rejection in cable reverse-path systems. |
| Analog Input Bandwidth | 750 MHz - preserves signal integrity for harmonics and wideband modulated waveforms without external filtering. |
| Power Dissipation | 1.35 W (typical at 125 MSPS) - requires thermal management via exposed pad soldering per JEDEC 4-layer board guidelines. |
| Digital Output Voltage | 2.5 V to 3.3 V TTL/CMOS - allows direct interfacing with FPGA I/O banks without level-shifting circuitry. |
Pinout & Package
The AD9433BSQ-125 is housed in a 52-lead thin quad flat package with exposed thermal pad (TQFP_EP, SV-52-2), rated for −40°C to +85°C operation. The exposed paddle must be soldered to PCB ground plane to meet θJA = 16°C/W (1.0 m/s airflow) and ensure reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN / AIN | Differential analog input pair | Accepts 2 Vp-p true/complementary signal; common-mode voltage fixed at 4.0 V - no external bias required. |
| ENCODE / ENCODE | Differential clock input | PECL-compatible; rising edge triggers sampling; minimum pulse width 2.4 ns ensures timing margin at 125 MSPS. |
| D11–D0 | Parallel digital output bus | 12-bit LSB-first data; output format selected by DFS pin; OR flag indicates input saturation. |
| VCC (Pins 2,5,6,10,36,37,44,47,52) | Analog supply | 5.0 V ±2.5%; decoupling required per pin to suppress switching noise coupling into analog path. |
| VDD (Pins 13,22,23,32) | Digital supply | 3.3 V operation; separate DGND pins (12,21,24,31) prevent digital noise from corrupting analog ground. |
| SFDR MODE | Spurious optimization control | Logic-high enables internal circuit to improve SFDR by up to 11 dBc at cost of slight SINAD reduction. |
| DFS | Data format select | Low = twos complement; high = offset binary - determines FPGA or DSP data alignment requirements. |
Key Features
| Feature | Design Value |
|---|---|
| IF sampling capability | Validated up to 350 MHz input frequency - enables direct digitization of 70 MHz, 150 MHz, and 250 MHz IF bands without downconversion. |
| On-chip reference and T/H | Eliminates need for external reference buffer or driver amplifiers in most 3G/LMDS receiver designs. |
| Adjustable SFDR/SINAD trade-off | User-selectable via SFDR MODE pin - allows system-level optimization for spectral purity (e.g., cable DOCSIS) vs. dynamic range (e.g., radar pulse detection). |
| Low aperture jitter | 0.25 ps rms - limits sampling uncertainty-induced noise floor degradation at high IF frequencies. |
| Industrial temperature grade | −40°C to +85°C operation with guaranteed DNL ±0.3 LSB and INL ±1.0 LSB - suitable for outdoor base station deployments. |
Applications
| Cellular Infrastructure Receiver | LMDS/MMDS Base Station |
|---|---|
Use Scenario: Digitizing 70 MHz IF output from quadrature demodulator in 3G multicarrier base station transceiver. IC Role / Device Role / Timing Role: Primary ADC front-end capturing 10+ simultaneous WCDMA carriers with minimal intermodulation distortion. Use Value: 72 dBc SFDR at 150 MHz input enables >60 dB adjacent-channel power ratio (ACPR) compliance without additional analog filtering. |
Use Scenario: Sampling 120–150 MHz IF signals in fixed wireless broadband access point operating in 24–28 GHz licensed band. IC Role / Device Role / Timing Role: High-fidelity digitizer feeding FPGA-based channelization and OFDM symbol processing. Use Value: 750 MHz analog bandwidth preserves modulation accuracy across 20 MHz channels; 125 MSPS rate supports oversampling for improved noise shaping. |
| Cable Reverse-Path Monitoring | Radar Ground System Digitizer |
Use Scenario: Capturing upstream DOCSIS signals in 5–42 MHz band at headend node with multi-tone interference. IC Role / Device Role / Timing Role: Wideband ADC enabling real-time spectrum analysis and ingress detection across entire reverse path. Use Value: SFDR MODE pin allows dynamic switch to spurious-suppression mode during bursty upstream traffic, reducing false ingress alarms. |
Use Scenario: Digitizing pulsed L-band (1–2 GHz) RF returns in satellite ground station tracking receiver. IC Role / Device Role / Timing Role: High-speed IF sampler converting downconverted radar echoes for pulse compression and Doppler processing. Use Value: 67.7 dB SNR at 49.3 MHz and low DNL (±0.3 LSB) preserve pulse fidelity and enable sub-meter range resolution. |
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 |
|---|---|---|---|
| AD9432BSV-105 | Same 52-lead TQFP_EP footprint and pinout; lower max rate (105 MSPS); 67.5 dB SNR at 49 MHz; no SFDR MODE pin. | Limited to 3G single-carrier or narrowband IF systems where 125 MSPS oversampling is unnecessary. | Select when cost sensitivity outweighs need for 125 MSPS or SFDR optimization - drop-in replacement with no layout change. |
| ADS5463IPFP | 13-bit, 500 MSPS; 69 dB SNR at 100 MHz; requires external reference and clock conditioning; 64-pin HTQFP. | Targets higher IF bands (>300 MHz) and wider instantaneous bandwidths (e.g., electronic warfare, wideband test equipment). | Choose only if system demands >125 MSPS or >12-bit resolution - not pin-compatible; requires new layout and reference design. |
Compared with AD9432BSV-105, AD9433BSQ-125 adds 20 MSPS headroom and programmable SFDR enhancement; compared with ADS5463IPFP, it offers simpler power/thermal design and lower BOM count at the expense of raw speed and resolution - making it optimal for cost-constrained, thermally constrained 3G/LMDS infrastructure.
Availability
AD9433BSQ-125 is available at Aetrix Electronics and suitable for cellular infrastructure communication systems, LMDS base station units, and radar ground systems requiring stable component supply across extended product lifecycles.
Supply support for AD9433BSQ-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 portfolio, engineered specifically for demanding IF sampling applications in wireless infrastructure, defense, and instrumentation - emphasizing dynamic performance, integration, and thermal robustness.
FAQ
What is the maximum analog input frequency supported by the AD9433BSQ-125?
The AD9433BSQ-125 supports IF sampling up to 350 MHz, as verified in Figure 30 and Figure 32 of the Rev. A datasheet. This capability is enabled by its 750 MHz full-power analog bandwidth and low aperture jitter (0.25 ps rms), allowing direct digitization of high-IF signals without image-reject filtering. Performance remains characterized up to 350 MHz with SNR ≥54.6 dB and SFDR ≥58 dBc at 125 MSPS.
Does the AD9433BSQ-125 require external reference components?
No, the AD9433BSQ-125 includes an on-chip 2.5 V reference (VREFOUT) and track-and-hold circuit, eliminating the need for external reference buffers or drivers in most applications. VREFIN can accept an external 2.5 V reference if tighter tolerance or lower drift is required, but internal operation is fully functional with VREFOUT bypassed to ground via 0.1 μF capacitor.
How does the SFDR MODE pin affect the performance of the AD9433BSQ-125?
When SFDR MODE is pulled high, the AD9433BSQ-125 activates an on-chip proprietary circuit that optimizes spurious-free dynamic range - improving SFDR by up to 11 dBc (e.g., from 72 dBc to 83 dBc at 70 MHz) at the expense of slight SINAD reduction. This mode is ideal for spectral-critical applications like cable reverse-path monitoring where discrete spurs dominate system noise floor.
What is the recommended power supply decoupling for the AD9433BSQ-125?
Each VCC pin (5 V analog supply) requires individual 0.1 μF ceramic + 10 μF tantalum decoupling close to the pin; VDD pins (3.3 V digital supply) need 0.1 μF ceramics per pin. The exposed thermal pad must be soldered to a solid ground plane, and analog/digital grounds (GND vs. DGND) must be separated except at a single-point connection near the ADC to minimize noise coupling - per Layout Information section (Page 19).
Is the AD9433BSQ-125 pin-compatible with other members of the AD943x family?
Yes, the AD9433BSQ-125 is pin-compatible with the AD9432BSV-105, sharing identical 52-lead TQFP_EP footprint, pin configuration, and function mapping - confirmed in Product Highlights (Page 1) and Pin Configuration (Page 7). This allows seamless upgrade from 105 MSPS to 125 MSPS without PCB redesign, provided thermal and power delivery margins accommodate the +0.15 W dissipation increase.
AD9433BSQ-125 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):
- 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:
- -
AD9433BSQ-125 FAQ
1.How can I place an order for AD9433BSQ-125 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9433BSQ-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 AD9433BSQ-125 reliable?
The price and inventory of AD9433BSQ-125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9433BSQ-125 is usually 5 days.
3.What payment methods are accepted for AD9433BSQ-125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9433BSQ-125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9433BSQ-125?
AD9433BSQ-125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9433BSQ-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 AD9433BSQ-125?
For technical support, including AD9433BSQ-125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9433BSQ-125 requirements.
6.How does Aetrix verify that AD9433BSQ-125 is sourced from the original manufacturer or authorized distributors?
All AD9433BSQ-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 AD9433BSQ-125 meets industry standards.
7.What is the process for return or replacement of AD9433BSQ-125?
All AD9433BSQ-125 units undergo pre-shipment inspection (PSI). If there is an issue with AD9433BSQ-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 AD9433BSQ-125 part is unused and in its original packaging.
Return procedure for AD9433BSQ-125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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