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Analog Devices Inc. AD9901TQ/883B
- Part No.:
- AD9901TQ/883B
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD9901TQ/883B.pdf
- Description:
- IC DIG PHASE/FREQ DISCRIM 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,459
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Product details
Overview
AD9901TQ/883B from Analog Devices is an ultrahigh-speed digital phase/frequency discriminator operating up to 200 MHz with linear transfer function, no dead zone, and MIL-STD-883B compliance for military temperature range (–55°C to +125°C). It functions as a core error generator in PLL systems for radar, secure comms, and agile IF loops.
For engineers reviewing the AD9901TQ/883B datasheet, AD9901TQ/883B pinout, AD9901TQ/883B application, or AD9901TQ/883B equivalent, key selection criteria include its 200 MHz input capability, ECL/TTL/CMOS logic compatibility, ±50° linear phase detection range at 200 MHz, open-collector output configuration, and ceramic DIP (Q-14) packaging for high-reliability environments.
Technical Context
The AD9901TQ/883B implements dual-mode operation: near-lock linear phase detection using two divide-by-two flip-flops and XOR logic, and wide-range frequency discrimination via dedicated Frequency High/Low flip-flops that override phase output when input frequency mismatch exceeds linear range. Its trench-oxide isolated process enables stable high-speed switching.
It supports three logic families: TTL/CMOS with +5 V supply and grounded BIAS/RSET, ECL with –5.2 V supply and –5.2 V BIAS/RSET, and mixed-mode biasing. Internal reference voltage is 0.47 V (±5%), setting full-scale output current via external RSET resistor per ISET = 0.47 V / RSET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Input Frequency | 200 MHz - enables direct comparison at standard IF without prescalers |
| Linear Phase Detection Range | ±50° at 200 MHz - eliminates dead zone near lock, reducing jitter |
| Supply Options | +5 V (TTL/CMOS) or –5.2 V (ECL) - selectable logic interface without level shifters |
| Output Configuration | Open-collector dual outputs - allows swing matching to post-filter input requirements |
| Operating Temperature | –55°C to +125°C - qualified per MIL-STD-883B for aerospace/defense deployment |
| Package Type | 14-lead ceramic DIP (Q-14) - hermetic, high-reliability, low-inductance grounding |
| Phase Gain | 0.286 V/rad (typ) - predictable error voltage scaling for loop filter design |
Pinout & Package
AD9901TQ/883B is housed in a 14-lead ceramic dual in-line package (Cerdip, Q-14), with lead spacing of 0.100" (2.54 mm), body width 0.310" (7.87 mm), and hermetic sealing suitable for extended military operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GROUND | Common ground reference for all internal circuitry; requires low-impedance connection to ground plane |
| 2 | BIAS | Logic mode select: connect to +5 V for TTL/CMOS, to –5.2 V for ECL operation |
| 3 | GROUND | Secondary ground pin; must be tied to system ground |
| 4 | GROUND | Third ground pin; ensures stable substrate reference under high-speed switching |
| 5 | VCO INPUT | TTL-compatible or ECL differential input (noninverted side); accepts oscillator signal |
| 6 | OUTPUT | Noninverted open-collector output; provides phase/frequency error signal polarity aligned with VCO tuning direction |
| 7 | +VS | Positive supply pin: +5.0 V for TTL/CMOS mode; left floating or grounded in ECL mode |
| 8 | GROUND | Fourth ground pin; critical for noise immunity in high-frequency operation |
| 9 | GROUND | Fifth ground pin; completes low-inductance return path for output stage |
| 10 | REFERENCE INPUT | TTL-compatible or ECL differential input (noninverted side); accepts reference signal |
| 11 | +VS | Second +5 V supply pin; used only in TTL/CMOS mode; decoupling required |
| 12 | OUTPUT | Inverted open-collector output; complements noninverted output for differential filtering or logic decoding |
| 13 | RSET | Current-setting terminal: connects to ground (TTL) or –5.2 V (ECL) via external resistor to set max output current |
| 14 | GROUND | Sixth ground pin; anchors die substrate potential and minimizes ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| No dead zone in linear region | Shifts nonlinear gain to endpoints (±50°), preserving constant 0.286 V/rad slope near lock to suppress phase noise |
| Dual-mode detection | Automatically switches between phase detection (near lock) and frequency discrimination (out-of-lock) without external control |
| Logic-family agnostic inputs/outputs | Single device supports TTL, CMOS, and ECL interfaces via supply and BIAS pin configuration - no external translators needed |
| Adjustable output current | RSET pin enables precise tailoring of output drive strength (0.9–11 mA range) to match downstream filter or amplifier input impedance |
| MIL-STD-883B qualification | Includes burn-in, mechanical shock, vibration, and temperature cycling testing - validated for mission-critical systems |
Applications
| Low Phase Noise Reference Loops | Fast-Tuning Agile IF Loops |
|---|---|
Use Scenario: Stabilizing local oscillator (LO) in precision frequency synthesizers where sub-degree phase error and minimal jitter are mandatory. IC Role / Device Role / Timing Role: Primary phase/frequency error generator in second-order passive-loop PLL, replacing analog mixers to eliminate DC offset drift. Use Value: Delivers 0.286 V/rad gain and ±50° linear range at 200 MHz, enabling tighter loop bandwidth and faster settling than analog alternatives. |
Use Scenario: Rapid frequency acquisition in software-defined radio (SDR) front-ends requiring sub-millisecond lock time across 10–100 MHz IF bands. IC Role / Device Role / Timing Role: Core discriminator in fast-lock PLL architecture, leveraging frequency-discrimination mode to pull VCO into phase-lock range before phase detection engages. Use Value: Eliminates harmonic locking and reduces acquisition time by >3× versus conventional digital PFDs due to seamless phase/frequency mode transition. |
| Secure Hopping Communications | Coherent Radar Transmitter/Receiver Chains |
Use Scenario: Synchronizing transmitter and receiver LOs in frequency-hopping spread spectrum (FHSS) systems with dwell times < 100 µs. IC Role / Device Role / Timing Role: Real-time phase comparator in hopping PLL, maintaining coherence across rapid, pseudorandom channel switches. Use Value: Supports 200 MHz input without prescalers and operates over –55°C to +125°C, ensuring deterministic lock timing across environmental extremes. |
Use Scenario: Maintaining phase coherence between transmit and receive paths in pulsed Doppler radar systems operating at X-band (8–12 GHz). IC Role / Device Role / Timing Role: Reference-to-VCO phase detector in ultra-stable LO generation chain, feeding low-pass filtered error to varactor-tuned oscillator. Use Value: Linear transfer function and absence of dead zone prevent phase ambiguity during pulse-to-pulse coherence checks, improving velocity resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase/frequency discriminator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9901KQ | Commercial grade (0°C to +70°C), same Q-14 ceramic DIP package and pinout | Limited to non-military environments; lacks MIL-STD-883B screening and extended temp validation | Select when cost sensitivity outweighs environmental ruggedness requirements |
| MC12080P | Frequency-only discriminator (no phase detection), 150 MHz max, bipolar process, single-ended ECL outputs | Cannot replace AD9901TQ/883B in phase-locked applications; suited only for coarse frequency alignment | Choose only for legacy ECL systems where phase linearity and lock stability are not required |
Compared with AD9901KQ, AD9901TQ/883B adds full military qualification and extended temperature operation but shares identical electrical behavior and pin compatibility; compared with MC12080P, AD9901TQ/883B provides true phase+frequency discrimination with linear transfer and no dead zone - essential for coherent radar and secure comms.
Availability
AD9901TQ/883B is available at Aetrix Electronics and suitable for radar transceiver design, secure frequency-hopping communications, and high-reliability aerospace timing systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD9901TQ/883B 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 precision instrumentation, communications, and defense markets since 1965.
The AD9901 product line delivers ultrahigh-speed digital phase/frequency discriminators engineered specifically for demanding PLL applications in radar, electronic warfare, and secure communications where linearity, speed, and reliability are non-negotiable.
FAQ
What logic families does the AD9901TQ/883B support?
The AD9901TQ/883B supports TTL, CMOS, and ECL logic families through configurable supply and BIAS pin connections: use +5 V on +VS and BIAS for TTL/CMOS; use –5.2 V on –VS and BIAS for ECL. Input thresholds and output swing adapt accordingly, eliminating need for external level shifters in mixed-signal systems.
How does the AD9901TQ/883B eliminate the "dead zone" common in digital phase detectors?
The AD9901TQ/883B shifts nonlinear gain to the endpoints of its transfer curve (±50° at 200 MHz) rather than centering it at lock, preserving constant 0.286 V/rad slope near zero phase difference. This avoids zero-gain regions that cause increased phase noise and jitter - a documented behavior confirmed in Rev. B datasheet Figure 7.
What is the role of the RSET pin on the AD9901TQ/883B?
The RSET pin on the AD9901TQ/883B sets maximum output current via external resistor: ISET = 0.47 V / RSET. In TTL mode, RSET connects to ground; in ECL mode, to –5.2 V. This enables precise adjustment of output drive strength (0.9–11 mA) to match downstream filter or amplifier input requirements without redesigning the entire loop.
Can the AD9901TQ/883B operate without a prescaler at 200 MHz?
Yes - the AD9901TQ/883B directly accepts 200 MHz phase/frequency inputs without prescaling, as explicitly stated in the General Description and confirmed by AC Characteristics table showing functionality pass/fail at 70 MHz and linear range data up to 200 MHz. This eliminates added latency and complexity of external divider chains.
Is the AD9901TQ/883B pin-compatible with other AD9901 variants?
Yes - AD9901TQ/883B uses the same 14-lead ceramic DIP (Q-14) package and identical pinout as AD9901KQ and AD9901TQ/8831, including ground distribution, +VS/–VS assignment, and RSET placement. All share functional equivalence except for temperature range and MIL-STD-883B screening requirements.
AD9901TQ/883B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Digital Phase/Frequency Discriminator
- PLL:
- Yes
- Input:
- CMOS, ECL, TTL
- Output:
- CMOS, ECL, TTL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:1
- Differential - Input:Output:
- Yes/Yes
- Frequency - Max:
- 200MHz
- Divider/Multiplier:
- No/No
- Voltage - Supply:
- 5V
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-CERDIP
AD9901TQ/883B FAQ
1.How can I place an order for AD9901TQ/883B through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9901TQ/883B 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 AD9901TQ/883B reliable?
The price and inventory of AD9901TQ/883B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9901TQ/883B is usually 5 days.
3.What payment methods are accepted for AD9901TQ/883B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9901TQ/883B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9901TQ/883B?
AD9901TQ/883B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9901TQ/883B 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 AD9901TQ/883B?
For technical support, including AD9901TQ/883B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9901TQ/883B requirements.
6.How does Aetrix verify that AD9901TQ/883B is sourced from the original manufacturer or authorized distributors?
All AD9901TQ/883B 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 AD9901TQ/883B meets industry standards.
7.What is the process for return or replacement of AD9901TQ/883B?
All AD9901TQ/883B units undergo pre-shipment inspection (PSI). If there is an issue with AD9901TQ/883B, 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 AD9901TQ/883B part is unused and in its original packaging.
Return procedure for AD9901TQ/883B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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