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Analog Devices Inc. AD847JNZ
- Part No.:
- AD847JNZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AD847JNZ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:538
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Product details
Overview
AD847JNZ from Analog Devices is a high-speed, low-power monolithic operational amplifier optimized for video and imaging signal conditioning. It delivers 50 MHz unity-gain bandwidth, 300 V/µs slew rate, and 0.04% differential gain (NTSC/PAL) at ±15 V supply, enabling precision buffering in flash ADC front-ends and video line drivers.
For engineers reviewing the AD847JNZ datasheet, AD847JNZ pinout, AD847JNZ application, or AD847JNZ equivalent, this page provides verified specifications, package mapping to 8-lead PDIP (N-8), real-world settling time (65 ns to 0.1%), and validated alternatives for video instrumentation, high-speed DAC buffering, and imaging equipment design.
Technical Context
The AD847JNZ employs Analog Devices' complementary bipolar (CB) process with npn input stage and fast pnp folded cascode gain stage, enabling stable unity-gain operation without external compensation. Its internal compensation capacitor (CF) dynamically adapts to capacitive load, maintaining stability while driving up to 1000 pF.
It features rail-to-rail input common-mode range (±13.4 V at ±15 V supplies), 15 nV/√Hz input voltage noise at 10 kHz, and 1.5 pA/√Hz input current noise - critical for preserving SNR in high-fidelity analog signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 50 MHz at ±15 V - supports full-power signal fidelity up to 12.7 MHz (5 Vp-p) for flash ADC input buffering. |
| Slew Rate | 300 V/µs at ±15 V - enables clean 20 Vp-p output swing into 1 kΩ with minimal distortion. |
| Settling Time (0.1%) | 65 ns for 10 V step - meets timing budgets of 100+ MSPS data acquisition systems. |
| Differential Gain / Phase | 0.04% / 0.19° at 4.4 MHz - satisfies broadcast-grade NTSC/PAL video linearity requirements. |
| Input Offset Voltage | 0.5 mV max (±5 V) - reduces DC error in precision gain stages without nulling circuitry. |
| Quiescent Current | 5.3 mA at ±15 V - balances speed and power efficiency for multi-channel video systems. |
| Output Voltage Swing | ±10 V into 500 Ω at ±15 V - drives terminated 75 Ω coaxial cables via level-shifting networks. |
Pinout & Package
AD847JNZ is packaged in an 8-lead plastic DIP (N-8) with 0.300-inch wide body, compliant with JEDEC MS-001. Pin 1 is marked by notch or dot; leads are tin-lead plated for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Connects to external potentiometer for fine-tuning input offset voltage; optional for most video applications. |
| 2 | Inverting Input (–IN) | High-impedance node for feedback network connection; requires impedance matching (e.g., 100 Ω to ground) to minimize bias current error. |
| 3 | Noninverting Input (+IN) | High-impedance node for signal reference; protected by ±6 V differential limit - series resistor required if exposed to transients. |
| 4 | –VS | Negative supply rail; must be bypassed with 0.1 µF ceramic capacitor placed ≤5 mm from pin. |
| 5 | Offset Null | Second terminal of offset null potentiometer; used with Pin 1 to form balanced nulling network. |
| 6 | Output | Low-output-impedance driver capable of sourcing/sinking 32 mA; stable into any capacitive load per internal CF compensation. |
| 7 | +VS | Positive supply rail; requires local 0.1 µF ceramic bypass to ground to suppress high-frequency PSRR degradation. |
| 8 | NC | No internal connection; electrically isolated - may be left floating or grounded for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable with any capacitive load | Internal CF compensation eliminates need for external isolation resistors when driving >100 pF loads (e.g., coax, ADC inputs). |
| Video-optimized AC performance | 0.04% differential gain and 0.19° phase error at 4.4 MHz ensure broadcast-compliant color fidelity in camera and scanner signal chains. |
| Wide supply range | Operates from ±4.5 V to ±18 V - supports legacy ±5 V logic interfaces and modern ±15 V analog subsystems without redesign. |
| Low input bias current | 3.3 µA typical (±5 V/±15 V) - minimizes voltage drop across high-value feedback resistors in precision gain configurations. |
| Fast settling to 0.1% | 65 ns for 10 V step enables use in 12-bit+ flash ADC buffers where aperture uncertainty must remain <0.01%. |
Applications
| Video Line Driver | Flash ADC Input Buffer |
|---|---|
Use Scenario: Driving doubly terminated 75 Ω coaxial cable in broadcast camera output stage. IC Role / Device Role / Timing Role: Unity-gain voltage follower providing low-output-impedance drive and reflection suppression via back-termination. Use Value: Maintains 23 MHz –3 dB bandwidth and 4% overshoot at ±15 V, meeting SMPTE 259M timing jitter limits for HD-SDI baseband signals. |
Use Scenario: Conditioning analog input to AD9048 80 MSPS flash ADC in medical ultrasound beamformer. IC Role / Device Role / Timing Role: High-fidelity unity-inverter buffer isolating ADC sample-and-hold from source impedance variations. Use Value: 65 ns settling ensures <0.1% code-dependent error across full 2 V input range, preserving ENOB >7.8 bits at Nyquist. |
| High-Speed DAC Output Buffer | Imaging Signal Chain Amplifier |
Use Scenario: Converting current output of AD668 12-bit DAC into single-ended voltage for FPGA-based waveform generation. IC Role / Device Role / Timing Role: Transimpedance amplifier establishing virtual ground summing node for DAC current sink. Use Value: 50 MHz bandwidth and 300 V/µs slew rate support 10 MHz update rates with <0.05% integral nonlinearity over temperature. |
Use Scenario: Amplifying CCD sensor output in industrial machine vision scanner with 100 fps frame rate. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain stage preceding correlated double sampling (CDS) circuitry. Use Value: 15 nV/√Hz input noise and 0.04% differential gain preserve dynamic range >72 dB across 1–10 MHz pixel clock harmonics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD827JRZ | Dual-channel version in SOIC-8; identical AC specs but higher quiescent current (6.3 mA/channel at ±15 V). | Better suited for multi-channel active filters or dual-path video processing where space-constrained PCB layout favors SOIC. | Select AD827JRZ when board area is limited and dual amplification is needed - same footprint as AD847JNZ but no NC pin. |
| LM6361MX/NOPB | Lower unity-gain bandwidth (45 MHz), higher input bias current (10 µA), and no guaranteed differential gain spec. | Acceptable for non-broadcast video (e.g., copier scanning) where cost sensitivity outweighs NTSC/PAL compliance. | Choose LM6361MX/NOPB only for cost-driven consumer imaging where 0.04% differential gain is not required. |
Compared with AD847JNZ, AD827JRZ offers channel density at the expense of thermal dissipation in PDIP packages, while LM6361MX/NOPB trades video linearity for lower unit cost - neither is pin-compatible, requiring layout revision.
Availability
AD847JNZ is available at Aetrix Electronics and suitable for video instrumentation, imaging equipment, and high-speed DAC/ADC interface designs requiring stable component supply across extended temperature ranges (0°C to +70°C).
Supply support for AD847JNZ 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 AD847JNZ belongs to Analog Devices' high-speed op amp product line, engineered specifically for demanding video, imaging, and data acquisition applications where bandwidth, settling accuracy, and video linearity are co-critical.
FAQ
What is the maximum capacitive load the AD847JNZ can drive without oscillation?
The AD847JNZ is internally compensated to remain stable when driving any capacitive load, including 1000 pF as demonstrated in Figure 24 of the official datasheet. This eliminates the need for external isolation resistors in applications such as coaxial cable driving or ADC input buffering - a key differentiator from many competing high-speed op amps that require careful load compensation.
Does the AD847JNZ require external offset nulling in precision applications?
The AD847JNZ has a guaranteed maximum input offset voltage of 1 mV at +25°C (0.5 mV typical), which is sufficiently low for most video and imaging applications. External nulling via Pins 1 and 5 is optional and only necessary in DC-coupled precision gain stages where sub-millivolt offset is critical - the datasheet provides a standard potentiometer configuration for this purpose.
Can the AD847JNZ operate from a single +5 V supply?
No - the AD847JNZ is specified for dual-supply operation only, with minimum ±4.5 V and absolute maximum ±18 V. It does not support true single-supply operation because its input common-mode range does not extend to the negative rail, and output swing is asymmetric under unbalanced supplies. For single-supply designs, consider the AD8051 or AD8057 families instead.
What is the thermal resistance (θJA) of the AD847JNZ in its N-8 package?
The AD847JNZ in the plastic DIP (N-8) package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as documented in the Absolute Maximum Ratings section. This value assumes standard PCB mounting with no copper pour; adding a 1-in² copper pad under the package reduces θJA by ~20°C/W, critical for sustained 300 V/µs operation at elevated ambient temperatures.
Is the AD847JNZ pin-compatible with the LM6361 it replaces?
No - although the AD847JNZ is documented as an enhanced replacement for the LM6361, it is not pin-compatible. The LM6361 uses an 8-lead SOIC package with different pin assignments (e.g., no dedicated offset null pins), while the AD847JNZ in PDIP has Pins 1 and 5 reserved for offset adjustment and Pin 8 as NC. Board redesign is required for direct substitution.
AD847JNZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 300V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3.3 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 5.3mA
- Current - Output / Channel:
- 32 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AD847JNZ FAQ
1.How can I place an order for AD847JNZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD847JNZ 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 AD847JNZ reliable?
The price and inventory of AD847JNZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD847JNZ is usually 5 days.
3.What payment methods are accepted for AD847JNZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD847JNZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD847JNZ?
AD847JNZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD847JNZ 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 AD847JNZ?
For technical support, including AD847JNZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD847JNZ requirements.
6.How does Aetrix verify that AD847JNZ is sourced from the original manufacturer or authorized distributors?
All AD847JNZ 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 AD847JNZ meets industry standards.
7.What is the process for return or replacement of AD847JNZ?
All AD847JNZ units undergo pre-shipment inspection (PSI). If there is an issue with AD847JNZ, 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 AD847JNZ part is unused and in its original packaging.
Return procedure for AD847JNZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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