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Analog Devices Inc. AD9500BP
- Part No.:
- AD9500BP
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
AD9500BP.pdf
- Description:
- IC CLOCK GENERATOR 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:10,068
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Product details
Overview
AD9500BP from Analog Devices is a digitally programmable delay generator IC with 10 ps delay resolution, 2.5 ns to 10 ms full-scale range, and differential ECL-compatible TRIGGER/RESET inputs. It delivers precise timing control in high-speed test equipment and pulse deskewing systems using an internal linear ramp generator and 8-bit DAC.
For engineers reviewing the AD9500BP datasheet, AD9500BP pinout, AD9500BP application, or AD9500BP equivalent, key selection considerations include minimum propagation delay (5.4–7.4 ns), delay uncertainty (10 ps jitter), ECLREF midpoint reference for single-ended input biasing, and latch-controlled digital interface compatibility with TTL logic levels.
Technical Context
The AD9500BP implements a linear ramp-based delay architecture where a triggering event initiates a falling voltage ramp; delay is determined by the time required for the ramp to cross a DAC-set threshold. Its internal timing path includes separate differential TRIGGER and RESET input stages referenced to ECLREF (–1.3 V nominal), enabling both single-ended and differential drive modes.
Delay programming uses an 8-bit transparent latch (LATCH ENABLE active HIGH) feeding an internal DAC that sets the threshold level. The total delay comprises fixed minimum propagation delay (tPD) plus programmable component scaled by RSET and CEXT, with offset adjust current (±2 mA) available to fine-tune tPD linearity across full-scale settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay Resolution | 10 ps - enables sub-ns timing alignment in high-speed ATE and waveform generation |
| Full-Scale Range | 2.5 ns to 10 ms - selectable via external RSET (220 Ω–50 kΩ) and CEXT (0–0.1 µF) |
| Min Propagation Delay | 5.4–7.4 ns - fixed latency added to all programmed delays; varies with temperature (7.5 ps/°C TC) |
| Delay Uncertainty | 10 ps - peak-to-peak jitter at +25°C; critical for deterministic timing in synchronized systems |
| Supply Voltages | +VS = +5.0 V, –VS = –5.2 V - dual-rail ECL-compatible supply; nominal 312 mW power dissipation |
| Digital Interface | 8-bit parallel TTL inputs (D0–D7), LATCH ENABLE active HIGH - allows real-time or strobed delay updates |
| Input Compatibility | Differential TRIGGER/RESET with ECLREF bias - supports ECL, TTL, and analog signal sources without external level-shifting |
Pinout & Package
AD9500BP is packaged in a 28-lead leadless PLCC (P-28A), 0.495" × 0.495" body, with gull-wing surface-mount leads. Pin 1 identifier located at top-left corner of top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0 (LSB)–D7 (MSB) | Digital delay code inputs | 8-bit parallel word sets DAC threshold; LSB = D0, MSB = D7; TTL-compatible logic levels |
| LATCH ENABLE | Transparent latch control | Logic HIGH freezes digital input code; LOW enables real-time DAC tracking of input changes |
| TRIGGER / TRIGGER | Differential edge-sensitive trigger input | Initiates ramp cycle on rising/falling edge; must be driven differentially or referenced to ECLREF |
| RESET / RESET | Differential level-sensitive reset input | Discharges ramp capacitor to terminate output pulse; requires valid differential or ECLREF-biased drive |
| Q / Q | Complementary ECL outputs | Q goes HIGH after programmed delay; Q is inverted; both terminated to –2.0 V via 50 Ω |
| QR | Parallel reset-timing output | Same polarity as Q; used to extend output pulsewidth via RC network without loading Q/Q |
| ECLREF | ECL midpoint reference | Nominally –1.3 V; enables single-ended ECL input operation by biasing one side of differential pair |
| OFFSET ADJUST | Minimum delay calibration node | Sinks or sources up to ±2 mA to shift DAC threshold and compensate tPD drift across full-scale range |
| CS / RS | Timing capacitor / reference current terminals | CS connects external CEXT (0–0.1 µF); RS connects RSET (220 Ω–50 kΩ) to set full-scale delay range |
| +VS / –VS / GROUND / ECL COMMON | Power and reference nodes | +VS = +5.0 V, –VS = –5.2 V, GROUND = TTL/analog return, ECL COMMON = ECL output collector tie-point |
Key Features
| Feature | Design Value |
|---|---|
| 10 ps delay resolution | Enables precise deskewing of high-speed signals with <10 ps channel-to-channel mismatch tolerance |
| Fully differential TRIGGER/RESET inputs | Eliminates need for external differential receivers; supports ECL, TTL, and analog sources via ECLREF bias | Onboard ECLREF midpoint reference | Allows single-ended ECL input drive without external resistive dividers or level translators |
| Offset adjust current control | ±2 mA injection/sinking calibrates minimum propagation delay across temperature and full-scale settings |
| QR parallel output | Decouples reset timing from main outputs, preserving Q/Q drive capability for downstream logic |
| Transparent latch interface | LATCH ENABLE LOW enables continuous DAC update; HIGH latches code for stable delay during operation |
Applications
| ATE Timing Calibration | Pulse Deskewing |
|---|---|
Use Scenario: Calibrating timing offsets between multiple channels in automated test equipment during production validation. IC Role / Device Role / Timing Role: Generates precisely adjustable reference delays to align stimulus/response paths across DUT interfaces. Use Value: Achieves <10 ps inter-channel skew correction using 8-bit programmability and 10 ps resolution. | Use Scenario: Compensating for trace-length-induced timing mismatches in high-speed digital backplanes or memory subsystems. IC Role / Device Role / Timing Role: Introduces calibrated delays on individual data lanes to realign parallel bus signals at receiver inputs. Use Value: Enables deterministic setup/hold timing recovery without modifying PCB layout or connector routing. |
| Arbitrary Waveform Generation | High-Stability Timing Source |
Use Scenario: Constructing complex pulse trains with variable width, spacing, and edge placement in lab-grade signal synthesizers. IC Role / Device Role / Timing Role: Serves as programmable delay element in multi-stage timing chains to shape output waveform edges and intervals. Use Value: Delivers 2.5 ns–10 ms delay range with 10 ps granularity, supporting sub-nanosecond waveform fidelity. | Use Scenario: Providing low-jitter, temperature-stable delay references in precision instrumentation and metrology systems. IC Role / Device Role / Timing Role: Acts as deterministic delay node with 10 ps jitter and 0.5 ps/°C full-scale TC for repeatable timing benchmarks. Use Value: Maintains <±10 ps delay stability over –25°C to +85°C industrial operating range without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally programmable delay generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9501BP | Same 28-lead PLCC package, identical pinout, but features extended full-scale range (up to 20 ms) and improved integral linearity (0.5 LSB vs. 1.0 LSB) | Better suited for ultra-long-delay applications requiring >10 ms range or tighter monotonicity in DAC transfer function | Select AD9501BP when full-scale delay exceeds 10 ms or integral linearity below 1.0 LSB is mandatory |
| LMK03806RHAT | Integrated clock conditioner with programmable delay (1 ps resolution), but lacks dedicated differential TRIGGER/RESET inputs and ECLREF biasing | Targets clock tree distribution rather than pulse-level timing control; requires external level-shifting for ECL interfacing | Choose LMK03806RHAT only in clock synchronization contexts where JESD204B or PCIe timing compliance is required |
Compared with AD9500BP, AD9501BP extends full-scale delay capability and improves DAC linearity while maintaining pin compatibility, whereas LMK03806RHAT trades dedicated pulse timing functionality for integrated clock synthesis-making it unsuitable for direct replacement in ATE or deskewing roles.
Availability
AD9500BP is available at Aetrix Electronics and suitable for automated test equipment, pulse deskewing systems, arbitrary waveform generators, and high-stability timing sources requiring stable component supply across industrial temperature ranges.
Supply support for AD9500BP 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 AD9500BP belongs to Analog Devices' precision timing product line, engineered specifically for sub-nanosecond delay generation in high-speed test, measurement, and signal integrity applications.
FAQ
What is the operating temperature range for the AD9500BP?
The AD9500BP is rated for industrial temperature operation from –25°C to +85°C. This range is explicitly specified in the ordering guide and electrical characteristics tables for the AD9500BP/BQ variant. Performance parameters-including delay resolution, propagation delay, and jitter-are guaranteed across this full range, with thermal coefficients provided for key specs like minimum propagation delay (7.5 ps/°C) and full-scale range (0.5 ps/°C).
How does the AD9500BP achieve 10 ps delay resolution?
The AD9500BP achieves 10 ps delay resolution through its internal linear ramp generator architecture combined with an 8-bit DAC that divides the full-scale delay range into 256 discrete steps. When configured for the minimum full-scale setting of 2.5 ns, each step equals 2.5 ns ÷ 256 ≈ 9.77 ps-rounded to 10 ps in specification. This resolution is maintained across all full-scale ranges, though absolute step size scales linearly with RSET and CEXT values.
Can the AD9500BP operate with TTL-level inputs instead of ECL?
Yes, the AD9500BP can operate with TTL-level inputs. Its TRIGGER and RESET inputs are fully differential and designed primarily for ECL signal levels, but the datasheet explicitly states they "function with analog and TTL input levels." When using TTL, the ECLREF pin (–1.3 V) serves as a bias reference to establish proper common-mode voltage, allowing reliable detection of TTL logic transitions without external level-shifting circuitry.
What is the purpose of the QR output on the AD9500BP?
The QR output on the AD9500BP is a parallel copy of the Q output, designed specifically to drive reset circuitry without loading the primary Q/Q outputs. In extended pulsewidth configurations, QR drives an RC network connected to the RESET inputs, delaying the reset event and thereby extending the output pulse duration. This preserves the drive strength and signal integrity of Q and Q for use in downstream logic, avoiding fanout limitations imposed by directly connecting Q to RESET.
How is the full-scale delay range set on the AD9500BP?
The full-scale delay range of the AD9500BP is set externally using two components: RSET connected between RS and –VS (–5.2 V), and CEXT connected between CS and +VS (+5.0 V). The relationship is Total Delay = tPD + (digital value/256) × RSET × (CEXT + 10 pF). RSET values range from 220 Ω to 50 kΩ, and CEXT from 0 pF to 0.1 µF, enabling full-scale delays from 2.5 ns to over 10 ms as verified in the electrical characteristics table.
AD9500BP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD9500
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Clock Generator
- PLL:
- No
- Input:
- ECL, TTL
- Output:
- ECL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 10:2
- Differential - Input:Output:
- No/Yes
- Frequency - Max:
- -
- Divider/Multiplier:
- No/No
- Voltage - Supply:
- -5.2V, 5V
- Operating Temperature:
- -25°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
AD9500BP FAQ
1.How can I place an order for AD9500BP through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9500BP 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 AD9500BP reliable?
The price and inventory of AD9500BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9500BP is usually 5 days.
3.What payment methods are accepted for AD9500BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9500BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9500BP?
AD9500BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9500BP 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 AD9500BP?
For technical support, including AD9500BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9500BP requirements.
6.How does Aetrix verify that AD9500BP is sourced from the original manufacturer or authorized distributors?
All AD9500BP 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 AD9500BP meets industry standards.
7.What is the process for return or replacement of AD9500BP?
All AD9500BP units undergo pre-shipment inspection (PSI). If there is an issue with AD9500BP, 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 AD9500BP part is unused and in its original packaging.
Return procedure for AD9500BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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