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Analog Devices Inc. AD844JRZ-16
- Part No.:
- AD844JRZ-16
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD844JRZ-16.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
AD844JRZ-16 from Analog Devices is a current-feedback operational amplifier optimized for high-speed inverting-mode applications including video buffers, flash ADC input stages, and current DAC interfaces. It delivers 60 MHz small-signal bandwidth at gain = −1, 2000 V/μs slew rate, 100 ns settling to 0.1%, and differential gain/phase errors of 0.03% and 0.16° at 4.4 MHz - enabling precision analog signal conditioning in broadcast video and high-speed data acquisition systems.
For engineers reviewing the AD844JRZ-16 datasheet, AD844JRZ-16 pinout, AD844JRZ-16 application, or AD844JRZ-16 equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for current-feedback op amp selection in demanding wideband circuits.
Technical Context
The AD844JRZ-16 uses a junction-isolated complementary bipolar (CB) process with a low-impedance inverting input (~50 Ω) and high-impedance noninverting input (~10 MΩ), enabling true current-feedback architecture. Its closed-loop bandwidth depends primarily on the external feedback resistor-not gain-allowing stable 33 MHz operation at gain = −10 and 60 MHz at gain = −1.
Unlike voltage-feedback op amps, it eliminates classical slew rate limitations: output dV/dt exceeds 2000 V/μs for full 20 V steps, and settling time remains ~100 ns to 0.1% across gains. The transresistance (Rt) is 2.2–3.0 MΩ, transcapacitance (Ct) is 4.5 pF, and open-loop pole occurs near 12 kHz - all defining its stability and high-frequency behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small Signal Bandwidth | 60 MHz at gain = −1: enables clean amplification of fast video or pulse signals without phase distortion. |
| Slew Rate | 2000 V/μs: supports full-scale 20 V output transitions in under 10 ns, critical for flash ADC front-ends. |
| Settling Time | 100 ns to 0.1% (10 V step): ensures accurate sampling in high-speed data converters with minimal aperture error. |
| Differential Gain/Phase Error | 0.03% / 0.16° at 4.4 MHz: meets broadcast video standards (e.g., NTSC/PAL) for color fidelity in cable drivers. |
| Input Impedance (−IN) | ~50 Ω: defines stable, resistor-set bandwidth and simplifies termination in 50 Ω systems like RF test equipment. |
| Transresistance (Rt) | 2.2–3.0 MΩ: sets dc gain accuracy in I-V conversion; combined with 50 Ω input yields ~60,000 V/V open-loop gain. |
| Supply Range | ±4.5 V to ±18 V: supports operation from low-voltage portable systems to industrial ±15 V rails. |
Pinout & Package
AD844JRZ-16 is housed in a 16-lead SOIC (RW) package with 1.27 mm pitch, 10.3 mm × 7.5 mm body, and exposed thermal pad (not electrically connected). Pin 1 is marked by notch or dot; pins 9–16 are mirrored relative to pins 1–8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 13, 16 | No Connect (NC) | Internally unconnected; must be left floating or tied to ground per layout best practices. |
| 2 | Inverting Input (−IN) | Low-impedance (~50 Ω) current-summing node; determines bandwidth via Rf; requires controlled-impedance routing. |
| 3 | Noninverting Input (+IN) | High-impedance (~10 MΩ) voltage-input node; sensitive to transients; keep < ±1 V for optimal noninverting performance. |
| 5 | Transimpedance Node (TZ) | Internal high-speed node where feedback current develops output voltage; not user-accessible. |
| 6 | Output | Capable of ±10 V into 500 Ω or ±2.5 V into 50 Ω; short-circuit protected to 80 mA. |
| 7 | +VS | Positive supply pin; decouple with ≥0.1 µF ceramic capacitor close to pin. |
| 8 | −VS | Negative supply pin; symmetric decoupling required for balanced PSRR. |
| 9–12 | No Connect (NC) | Unused die bond pads; electrically isolated; no routing or connection needed. |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Bandwidth set by feedback resistor-not gain-enabling predictable 60 MHz operation at −1 gain and 33 MHz at −10 gain. |
| Zero slew-rate limitation | Rise/fall times independent of output amplitude; 100 ns settling holds for both 2 V and 20 V steps. |
| Laser-trimmed offset | Max 300 μV (J-grade) with 1 μV/°C drift; minimizes dc error in precision I-V conversion and DC-coupled video paths. |
| 50 Ω inverting input impedance | Enables direct 50 Ω source termination and stable high-frequency response without added compensation networks. |
| Video-optimized linearity | Differential gain/phase errors of 0.03%/0.16° at 4.4 MHz meet SMPTE/EBU broadcast requirements for composite video. |
Applications
| Flash ADC Front-End | High-Speed DAC Buffer |
|---|---|
Use Scenario: Driving the sampling input of a 100+ MSPS flash ADC with low aperture jitter and minimal distortion. IC Role / Device Role / Timing Role: High-fidelity, low-settling-time buffer that preserves transient integrity of analog input prior to quantization. Use Value: 100 ns to 0.1% settling and 2000 V/μs slew rate ensure accurate capture of fast edges; 60 MHz bandwidth supports Nyquist zones up to 30 MHz. | Use Scenario: Converting current output from a high-speed multiplying DAC (e.g., AD976x) into a clean voltage signal for RF modulation. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with minimal phase shift and negligible gain error (<0.03%). Use Value: 50 Ω inverting input eliminates R-C pole instability caused by DAC output capacitance; transresistance stability ensures consistent scaling across temperature. |
| Composite Video Cable Driver | Pulse Amplifier for Test Equipment |
Use Scenario: Driving 75 Ω coaxial video cables over distances >100 ft in broadcast or medical imaging systems. IC Role / Device Role / Timing Role: Unity-gain inverting buffer with broadcast-grade differential gain/phase performance. Use Value: 0.03% differential gain error and 0.16° phase error at 4.4 MHz maintain color fidelity; ±2.5 V drive into 50 Ω supports terminated 75 Ω lines. | Use Scenario: Amplifying nanosecond-scale pulses in automated test equipment (ATE) or laser diode drivers. IC Role / Device Role / Timing Role: Fast, low-overshoot pulse amplifier with flat group delay and minimal ringing. Use Value: Clean 100 ns pulse response (Figure 16) and absence of slew-induced distortion enable precise timing edge placement in pulse generators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8001ARZ | Higher 800 MHz GBW, lower 1.5 nV/√Hz noise, but only 1200 V/μs slew rate and 25 ns settling; SOIC-8 package. | Better for RF IF amplification and low-noise preamps; less suitable for full-swing video or large-step ADC buffering. | Select AD8001ARZ when noise floor or small-signal bandwidth dominates; retain AD844JRZ-16 for large-signal fidelity and video linearity. |
| THS3091D | 1200 V/μs slew rate, 210 MHz bandwidth, ±15 V supply compatible, but higher 3.5 nV/√Hz noise and no laser-trimmed offset. | Optimized for high-output-current driver applications (±250 mA); lacks broadcast video characterization. | Choose THS3091D for driving heavy capacitive loads or low-impedance transmission lines; prefer AD844JRZ-16 for precision video and ADC interface where dc accuracy matters. |
Compared with AD844JRZ-16, AD8001ARZ trades large-signal speed and video linearity for higher small-signal bandwidth and lower noise, while THS3091D emphasizes output current capability over dc precision - making AD844JRZ-16 uniquely balanced for mixed-signal systems requiring both speed and fidelity.
Availability
AD844JRZ-16 is available at Aetrix Electronics and suitable for video infrastructure, high-speed data acquisition, and precision instrumentation applications requiring stable component supply across extended product lifecycles.
Supply support for AD844JRZ-16 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 AD844JRZ-16 belongs to Analog Devices' legacy high-speed current-feedback op amp family, designed specifically for applications demanding wide bandwidth, fast settling, and precision linearity in video, instrumentation, and data conversion systems.
FAQ
What is the maximum recommended supply voltage for AD844JRZ-16?
The absolute maximum supply voltage for AD844JRZ-16 is ±18 V dc. Operation within the specified range of ±4.5 V to ±18 V ensures compliance with electrical specifications in the Rev. G datasheet. Exceeding ±18 V risks permanent damage. For long-term reliability in industrial environments, Analog Devices recommends derating to ±16.5 V with proper thermal management and local decoupling.
Does AD844JRZ-16 support noninverting configurations?
Yes, AD844JRZ-16 can be used in noninverting mode, but performance degrades at low gains due to input stage biasing limitations. Best results occur at gains ≥ +10, with demonstrated 30 MHz bandwidth and clean pulse response. For gains below +10, inverting configuration is strongly preferred - the AD844JRZ-16's architecture is fundamentally optimized for inverting-mode operation.
What is the function of the TZ pin on AD844JRZ-16?
The TZ (Transimpedance) pin (Pin 5) on AD844JRZ-16 is an internal node - not externally accessible - where feedback current develops the output voltage. It connects internally to the high-speed current mirrors and output buffer. Users must not connect or route to Pin 5; doing so will disrupt internal biasing and cause malfunction. Pin 5 is NC in the 16-lead SOIC package.
Can AD844JRZ-16 drive a 50 Ω load directly?
Yes, AD844JRZ-16 is explicitly rated to drive 50 Ω loads to ±2.5 V with low distortion and is short-circuit protected to 80 mA. When driving 50 Ω, use ±15 V supplies and ensure adequate PCB copper area and thermal vias for heat dissipation. Output swing is reduced versus 500 Ω loading, but linearity and settling remain within datasheet limits - confirmed in Figure 8 and Table 1.
Is AD844JRZ-16 pin-compatible with other AD844 variants?
No - AD844JRZ-16 (16-lead SOIC) is not pin-compatible with AD844JNZ (8-lead PDIP) or AD844AQ (8-lead CERDIP). The 16-lead SOIC package has four NC pins (1, 4, 13, 16) and additional NC positions (9–12), while the 8-lead packages use all pins functionally. Board redesign is required when substituting between packages; refer to Figures 1 and 2 in the AD844 Rev. G datasheet for exact pin mapping.
AD844JRZ-16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 60 MHz
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 6.5mA
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
AD844JRZ-16 FAQ
1.How can I place an order for AD844JRZ-16 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD844JRZ-16 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 AD844JRZ-16 reliable?
The price and inventory of AD844JRZ-16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD844JRZ-16 is usually 5 days.
3.What payment methods are accepted for AD844JRZ-16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD844JRZ-16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD844JRZ-16?
AD844JRZ-16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD844JRZ-16 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 AD844JRZ-16?
For technical support, including AD844JRZ-16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD844JRZ-16 requirements.
6.How does Aetrix verify that AD844JRZ-16 is sourced from the original manufacturer or authorized distributors?
All AD844JRZ-16 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 AD844JRZ-16 meets industry standards.
7.What is the process for return or replacement of AD844JRZ-16?
All AD844JRZ-16 units undergo pre-shipment inspection (PSI). If there is an issue with AD844JRZ-16, 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 AD844JRZ-16 part is unused and in its original packaging.
Return procedure for AD844JRZ-16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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