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Analog Devices Inc. AD7625BCPZ
- Part No.:
- AD7625BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7625BCPZ.pdf
- Description:
- IC ADC 16BIT SAR 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:573
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Product details
Overview
AD7625BCPZ from Analog Devices is a 16-bit, 6 MSPS differential successive approximation register (SAR) analog-to-digital converter with 93 dB SNR, ±1 LSB INL, and LVDS serial interface - designed for high-speed, high-dynamic-range data acquisition in telecommunications receivers and spectrum analyzers.
For engineers reviewing the AD7625BCPZ datasheet, AD7625BCPZ pinout, AD7625BCPZ application, or AD7625BCPZ equivalent, key selection criteria include its no-latency SAR architecture, ±4.096 V differential input range, internal/external reference flexibility, and 32-lead 5 mm × 5 mm LFCSP package with exposed thermal pad.
Technical Context
The AD7625BCPZ implements a charge redistribution SAR architecture with dual capacitor arrays sampling antiphase differential inputs (IN+, IN−), enabling true 16-bit resolution with no missing codes and zero pipeline delay. Its conversion control accepts either CMOS (CNV+) or differential LVDS (CNV±) signals.
It supports two LVDS readout modes: self-clocked (with 2-bit header synchronization) and echoed-clock (where DCO± mirrors CLK±), both delivering 16-bit twos-complement data at 6 MSPS. Internal reference generation (4.096 V from 1.2 V bandgap) and external REF/REFIN options provide system-level flexibility without sacrificing accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes and full-scale linearity suitable for precision instrumentation. |
| Throughput Rate | 6 MSPS - enables real-time capture of wideband signals up to 100 MHz −3 dB input bandwidth. |
| SNR | 93 dB - supports >15.2 ENOB for high-fidelity signal reconstruction in test equipment. |
| Differential Input Range | ±4.096 V - matches standard precision reference voltages and simplifies front-end amplifier design. |
| INL | ±1 LSB maximum - ensures monotonicity and accurate amplitude measurement across full temperature range. |
| Power Dissipation | 135 mW at 6 MSPS with internal reference - balances speed and thermal management in dense PCB layouts. |
| Aperture Jitter | 0.25 ps rms - minimizes sampling uncertainty for high-frequency sinusoidal inputs. |
Pinout & Package
The AD7625BCPZ is housed in a 32-lead, 5 mm × 5 mm LFCSP_WQ package with exposed thermal pad requiring multiple vias to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 (Pins 1, 5, 6, 19, 20) | Analog 5 V supply | Power domain for SAR core and reference buffer; requires local 100 nF decoupling per pin. |
| VDD2 (Pins 7, 18) | Analog 2.5 V supply | Supplies internal DAC and comparator; must be routed before other VDD2 pins to minimize noise coupling. |
| VIO (Pin 12) | I/O interface supply | Defines LVDS logic levels for D±, DCO±, CLK±; decoupled with 100 nF capacitor. |
| CNV+, CNV− (Pins 8, 9) | Conversion trigger | Differential LVDS or single-ended CMOS input initiating sample-and-hold on rising edge. |
| IN+, IN− (Pins 22, 23) | Differential analog inputs | Accept antiphase signals referenced to VCM = REF/2; support ±4.096 V differential swing. |
| REF (Pins 29, 30, 32) | Buffered reference output | Delivers 4.096 V ±20 mV; all three pins must be shorted and decoupled with single 10 μF low-ESR capacitor. |
| D+, D− (Pins 10, 11) | LVDS data outputs | Serial twos-complement output; MSB-first timing referenced to CLK± or DCO± depending on mode. |
| DCO+, DCO− (Pins 14, 15) | LVDS clock echo outputs | Enable echoed-clock mode when ungrounded; grounded DCO+ selects self-clocked mode with 2-bit sync header. |
Key Features
| Feature | Design Value |
|---|---|
| No latency / no pipeline delay | True SAR architecture delivers deterministic conversion time (166 ns) - critical for closed-loop control and real-time triggering. |
| Internal 4.096 V buffered reference | Eliminates external reference IC and associated layout complexity while maintaining ±15 ppm/°C drift over −40°C to +85°C. |
| LVDS serial interface (self-clocked or echoed-clock) | Reduces digital I/O count to 4 pins (D±, DCO± or CLK±), minimizing EMI and PCB routing congestion at 6 MSPS. |
| Antiphase differential input architecture | Rejects common-mode noise up to 60 dB at 1 MHz and enables direct connection to transformer-coupled RF front-ends. |
| Three independent power domains (VDD1/VDD2/VIO) | Allows separate analog/digital supply optimization and noise isolation - essential for achieving 93 dB SNR in mixed-signal systems. |
Applications
| Telecommunications Receiver | Spectrum Analyzer Front-End |
|---|---|
Use Scenario: Digitizing IF signals in wideband SDR receivers operating up to 100 MHz bandwidth. IC Role / Device Role / Timing Role: High-speed, high-SNR ADC capturing complex baseband waveforms with minimal quantization noise. Use Value: 93 dB SNR and 106 dB SFDR preserve modulation fidelity for QAM-1024 and OFDM signals under multi-tone interference. |
Use Scenario: Real-time spectral analysis of RF signals using FFT-based processing in benchtop analyzers. IC Role / Device Role / Timing Role: Precision digitizer providing coherent sampling with sub-picosecond aperture jitter for accurate frequency-domain resolution. Use Value: 0.25 ps rms aperture jitter enables <1 kHz bin resolution at 100 MHz input without windowing artifacts. |
| Digital Imaging Acquisition | High-Speed Test Equipment |
Use Scenario: Capturing transient light pulses from scientific CCD/CMOS sensors in time-of-flight or LIDAR systems. IC Role / Device Role / Timing Role: Low-latency ADC synchronizing precisely to laser trigger events with deterministic 166 ns conversion cycle. Use Value: No pipeline delay ensures exact temporal alignment between optical pulse and digitized waveform for sub-nanosecond timing accuracy. |
Use Scenario: Embedded digitizer in automated test systems requiring repeatable, calibrated measurements across temperature. IC Role / Device Role / Timing Role: Metrology-grade ADC with ±1 LSB INL and ±1.5 LSB zero error over −40°C to +85°C. Use Value: Guaranteed linearity and stable reference enable traceable calibration without periodic re-trimming in production test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7626BCPZ | Same 16-bit, 6 MSPS SAR architecture but with 8-channel MUX and sequencer; higher power (165 mW). | Designed for multiplexed multi-sensor systems; lacks AD7625BCPZ's optimized single-channel SNR (93 dB vs. 91.5 dB). | Select AD7626BCPZ only when channel sequencing is required; AD7625BCPZ offers superior noise performance for dedicated high-fidelity channels. |
| AD7961BCPZ | 16-bit, 5 MSPS SAR ADC with similar LVDS interface but lower SNR (91 dB) and wider INL (±1.5 LSB max). | Targeted at cost-sensitive industrial DAQ; uses 32-lead LFCSP but lacks internal reference buffer. | Choose AD7961BCPZ for lower-cost, lower-accuracy applications where 2 dB SNR loss and external reference are acceptable. |
Compared with AD7626BCPZ and AD7961BCPZ, the AD7625BCPZ delivers the highest SNR and tightest INL in its 6 MSPS class, making it optimal for single-channel, metrology-grade acquisition where dynamic range and linearity are prioritized over channel count or BOM cost.
Availability
AD7625BCPZ is available at Aetrix Electronics and suitable for high-speed data acquisition, spectrum analysis, and telecommunications receiver designs requiring stable component supply and long-term manufacturability.
Supply support for AD7625BCPZ 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 AD7625BCPZ belongs to Analog Devices' PulSAR® family of precision high-speed SAR ADCs, engineered specifically for applications demanding both speed (≥5 MSPS) and DC/AC accuracy (≤±1 LSB INL, ≥92 dB SNR) in compact LFCSP packages.
FAQ
What is the maximum sampling rate supported by the AD7625BCPZ?
The AD7625BCPZ supports a maximum throughput rate of 6 MSPS, corresponding to a minimum conversion cycle time of 166 ns. This rate is achievable across the full operating temperature range (−40°C to +85°C) with specified AC performance including 93 dB SNR and 106 dB SFDR when using the internal reference and proper layout practices.
Does the AD7625BCPZ require an external reference voltage?
No - the AD7625BCPZ integrates a precision 4.096 V buffered reference derived from an internal 1.2 V bandgap source. It also supports external reference configurations: a 1.2 V source applied to REFIN (enabling internal buffer) or a 4.096 V source applied directly to REF (requiring internal reference disable via EN1/EN0 pins). All three REF pins must be shorted and decoupled with a single 10 μF capacitor.
How does the LVDS interface of the AD7625BCPZ operate in self-clocked versus echoed-clock mode?
In self-clocked mode (DCO+ grounded), the AD7625BCPZ outputs a 2-bit synchronization header (10) followed by 16-bit data on D±, allowing simple host logic to align to the data stream. In echoed-clock mode (DCO+ ungrounded), DCO± replicates CLK±, and data bits are latched on the rising edge of DCO+ after being driven on its falling edge - matching standard LVDS source-synchronous timing conventions.
What is the purpose of the VCM pin on the AD7625BCPZ?
The VCM pin on the AD7625BCPZ outputs a precise 2.048 V (REF/2) common-mode voltage, generated internally regardless of reference configuration (internal, REFIN, or external REF). This voltage is intended to bias the common-mode level of differential input amplifiers driving IN+ and IN−, ensuring optimal linearity and CMRR performance across the full input range.
Can the AD7625BCPZ be used with a single-ended input signal?
No - the AD7625BCPZ is strictly a differential-input ADC with antiphase architecture requiring complementary IN+ and IN− signals swinging 180° out of phase around VCM = 2.048 V. Single-ended signals must be converted to differential format using a transformer or fully differential amplifier (FDA) to maintain specified performance including 60 dB CMRR and 93 dB SNR.
AD7625BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 6M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.37V ~ 2.63V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7625BCPZ FAQ
1.How can I place an order for AD7625BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7625BCPZ 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 AD7625BCPZ reliable?
The price and inventory of AD7625BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7625BCPZ is usually 5 days.
3.What payment methods are accepted for AD7625BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7625BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7625BCPZ?
AD7625BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7625BCPZ 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 AD7625BCPZ?
For technical support, including AD7625BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7625BCPZ requirements.
6.How does Aetrix verify that AD7625BCPZ is sourced from the original manufacturer or authorized distributors?
All AD7625BCPZ 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 AD7625BCPZ meets industry standards.
7.What is the process for return or replacement of AD7625BCPZ?
All AD7625BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7625BCPZ, 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 AD7625BCPZ part is unused and in its original packaging.
Return procedure for AD7625BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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