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Analog Devices Inc. AD6645ASVZ-105
- Part No.:
- AD6645ASVZ-105
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-TQFP Exposed Pad
- Datasheet:
-
AD6645ASVZ-105.pdf
- Description:
- IC ADC 14BIT PIPELINED 52TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,298
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Product details
Overview
AD6645ASVZ-105 from Analog Devices is a 14-bit, 105 MSPS analog-to-digital converter (ADC) designed for high-performance IF sampling in multichannel receivers. It delivers 72 dB SNR at 200 MHz input frequency, 89 dBc SFDR at 70 MHz, and 0.1 ps rms aperture jitter, with differential analog inputs and CMOS-compatible 3.3 V digital outputs. It is used in 3G/4G base station IF digitization and antenna array processing.
For engineers reviewing the AD6645ASVZ-105 datasheet, AD6645ASVZ-105 pinout, AD6645ASVZ-105 application, or AD6645ASVZ-105 equivalent, key selection criteria include Nyquist-band SNR stability up to 200 MHz, multitone SFDR ≥98 dBFS, thermal management of the TQFP_EP package, and compatibility with AD6644-based layouts for upgrade paths.
Technical Context
The AD6645ASVZ-105 employs Analog Devices' XFCB bipolar process and a multipass circuit architecture to achieve high-speed sampling without sacrificing linearity or noise performance. Its track-and-hold and internal reference are fully integrated, enabling direct differential analog input operation without external support circuitry.
It supports IF sampling up to 200 MHz with 270 MHz analog input bandwidth and maintains 100 dBFS two-tone SFDR through the second Nyquist band. The device operates across −10°C to +85°C at full 105 MSPS rate and requires separate 5 V analog (AVCC) and 3.3 V digital (DVCC) supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - provides 16,384 quantization levels for high dynamic range signal capture |
| Max Sampling Rate | 105 MSPS - enables digitization of wideband IF signals up to 200 MHz per Nyquist criterion |
| SNR @ 200 MHz | 72 dB - ensures usable signal fidelity for high-frequency cellular IF bands |
| SFDR @ 70 MHz | 89 dBc - suppresses spurious content critical for multicarrier W-CDMA/GSM coexistence |
| Aperture Jitter | 0.1 ps rms - minimizes sampling-time uncertainty, preserving SNR at high input frequencies |
| Analog Input BW | 270 MHz - supports broadband RF front-end interfacing without external filtering degradation |
| Power Dissipation | 1.5 W - requires thermal design attention via exposed pad soldering to PCB ground plane |
Pinout & Package
The AD6645ASVZ-105 is housed in a 52-lead TQFP_EP (exposed pad) package, with the exposed paddle electrically connected to GND for thermal and electrical integrity. Thermal resistance θJC is 2°C/W when the heat sink is soldered to the PCB GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN / AIN | Differential analog input pair | Accepts 2.2 V p-p differential signal; impedance-matched interface required for optimal SFDR |
| ENCODE / ENCODE | Differential sampling clock input | Conversion triggered on rising edge; minimum pulse width 4.286 ns at 105 MSPS |
| D0–D13 | Twos-complement digital output bus | 14-bit parallel CMOS outputs referenced to DVCC = 3.3 V; LSB to MSB mapping confirmed |
| DRY | Data-ready strobe | Inverted, delayed version of ENCODE; used for synchronous latching of D0–D13 outputs |
| OVR | Overrange indicator | Active-high flag signaling analog input exceeding ±FS range; enables real-time clipping detection |
| VREF | 2.4 V reference output | Provides common-mode offset for external differential amplifiers (e.g., AD8138) in dc-coupled configurations |
| DMID | Digital midpoint reference | Stable ~1.65 V level (DVCC/2) for biasing data receivers or termination networks |
| EPAD | Exposed thermal pad | Must be soldered to PCB GND plane to meet θJC = 2°C/W and prevent junction overheating |
Key Features
| Feature | Design Value |
|---|---|
| IF sampling to 200 MHz | Enables direct digitization of cellular IF stages (e.g., 70–190 MHz) without downconversion loss |
| 100 dBFS multitone SFDR | Reduces need for ultra-linear RF filters and low-noise amplifiers in multimode receiver front ends |
| Pin compatible to AD6644 | Allows drop-in replacement in existing 14-bit, 40/65 MSPS designs-no PCB layout change required |
| Differential analog inputs | Rejects common-mode noise and improves PSRR; simplifies matching to baluns or transformer-coupled RF paths |
| Integrated T/H and reference | Eliminates external sample-hold ICs and reference buffers, reducing BOM count and board area |
Applications
| Base Station IF Digitization | Antenna Array Beamforming |
|---|---|
Use Scenario: Digitizing 70–150 MHz IF signals from multi-carrier GSM/W-CDMA transceivers in macrocell base stations. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth for digital channelization and demodulation. Use Value: 105 MSPS sampling and 270 MHz analog bandwidth enable single-chip digitization of multiple adjacent carriers without undersampling artifacts. | Use Scenario: Simultaneous sampling of 8–16 antenna elements in phased-array radar or 5G mMIMO systems. IC Role / Device Role / Timing Role: Synchronized ADC providing time-aligned 14-bit samples across parallel RF chains for coherent beam synthesis. Use Value: 0.1 ps aperture jitter ensures sub-degree phase coherence across channels at L/S-band frequencies. |
| Communications Test Equipment | Radar Signal Acquisition |
Use Scenario: Wideband signal analysis in vector signal analyzers measuring spectral purity of 3GPP-compliant transmitters. IC Role / Device Role / Timing Role: Front-end ADC delivering high-fidelity time-domain capture for FFT-based modulation error analysis. Use Value: 72 dB SNR at 200 MHz and 89 dBc SFDR at 70 MHz ensure accurate EVM and ACLR measurements per 3GPP TS 36.141. | Use Scenario: Pulse-Doppler radar digitizing intermediate frequency returns from airborne targets at X-band (8–12 GHz downconverted to 70–140 MHz). IC Role / Device Role / Timing Role: High-dynamic-range ADC preserving weak target echoes amid strong clutter and jamming. Use Value: 100 dBFS two-tone SFDR prevents intermodulation masking of low-RCS targets in dense spectral environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD6645ASVZ-80 | Same architecture and pinout; rated for 80 MSPS max, −40°C to +85°C operating range | Lower power (1.5 W typ), wider temperature range; suitable for industrial embedded systems with relaxed speed needs | Select when system clock is ≤80 MSPS and extended temperature operation is required |
| AD9643BCPZ-250 | 14-bit, 250 MSPS; JESD204B serial output; 1.8 V supply; no internal reference or T/H | Requires external clock distribution, reference, and analog conditioning; higher data throughput but greater system complexity | Select when JESD204B FPGA interface is preferred and board space allows supporting components |
Compared with AD6645ASVZ-80 and AD9643BCPZ-250, the AD6645ASVZ-105 uniquely balances 105 MSPS speed, full integration (T/H + reference), and −10°C to +85°C industrial-grade operation-making it optimal for cost-sensitive, thermally constrained IF sampling upgrades where layout reuse matters.
Availability
AD6645ASVZ-105 is available at Aetrix Electronics and suitable for base station infrastructure, radar signal acquisition, and communications instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for AD6645ASVZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD6645ASVZ-105 belongs to Analog Devices' SoftCell® transceiver chipset family, engineered specifically for multichannel, multimode digital receivers-including software-defined radios and 3G/4G infrastructure-with emphasis on IF sampling fidelity and layout compatibility.
FAQ
What is the maximum analog input frequency supported by the AD6645ASVZ-105?
The AD6645ASVZ-105 supports analog input frequencies up to 200 MHz while maintaining specified AC performance, including 72 dB SNR and functional SFDR. Its analog input bandwidth is 270 MHz, verified per datasheet Figure 5 and Table 3 test conditions at 200 MHz input with −1 dBFS amplitude and 105 MSPS encode rate.
Does the AD6645ASVZ-105 require external reference or track-and-hold circuitry?
No, the AD6645ASVZ-105 integrates both a precision 2.4 V internal reference (VREF) and a high-speed track-and-hold amplifier. These functions are monolithically implemented, eliminating the need for external reference buffers or standalone T/H ICs in standard IF sampling configurations.
What is the operating temperature range for the AD6645ASVZ-105 at full 105 MSPS speed?
The AD6645ASVZ-105 is specified for operation from −10°C to +85°C ambient temperature when running at its maximum 105 MSPS sampling rate. This is explicitly stated in Table 5 (Absolute Maximum Ratings) and confirmed in the General Description section of the Rev. E datasheet.
How does the AD6645ASVZ-105 differ from the AD6644 in terms of performance and compatibility?
The AD6645ASVZ-105 is pin-compatible with the AD6644 but offers significantly higher speed (105 vs. 65 MSPS), improved SNR at high input frequencies (72 dB at 200 MHz vs. ~68 dB), and enhanced SFDR (89 dBc at 70 MHz). Both share identical pinout, footprint, and 14-bit resolution, enabling direct layout reuse.
Is the exposed pad (EPAD) on the AD6645ASVZ-105 electrically connected, and how must it be handled?
Yes, the exposed pad (Pin 53, EPAD) on the AD6645ASVZ-105 is electrically connected to GND and must be soldered to the PCB's ground plane. Per Table 6 and Pin Function Descriptions, this connection is mandatory to achieve the specified θJC = 2°C/W thermal resistance and prevent junction temperature exceedance under 1.5 W power dissipation.
AD6645ASVZ-105 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-TQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 105M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -10°C ~ 85°C
- Supplier Device Package:
- 52-TQFP-EP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD6645ASVZ-105 FAQ
1.How can I place an order for AD6645ASVZ-105 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD6645ASVZ-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 AD6645ASVZ-105 reliable?
The price and inventory of AD6645ASVZ-105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD6645ASVZ-105 is usually 5 days.
3.What payment methods are accepted for AD6645ASVZ-105?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD6645ASVZ-105 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD6645ASVZ-105?
AD6645ASVZ-105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD6645ASVZ-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 AD6645ASVZ-105?
For technical support, including AD6645ASVZ-105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD6645ASVZ-105 requirements.
6.How does Aetrix verify that AD6645ASVZ-105 is sourced from the original manufacturer or authorized distributors?
All AD6645ASVZ-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 AD6645ASVZ-105 meets industry standards.
7.What is the process for return or replacement of AD6645ASVZ-105?
All AD6645ASVZ-105 units undergo pre-shipment inspection (PSI). If there is an issue with AD6645ASVZ-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 AD6645ASVZ-105 part is unused and in its original packaging.
Return procedure for AD6645ASVZ-105:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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