My Inquiry
My Account
Analog Devices Inc. AD8048ARZ
- Part No.:
- AD8048ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8048ARZ.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,814
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD8048ARZ from Analog Devices is a high-speed voltage feedback operational amplifier optimized for gain-of-two (G = +2) stable operation, delivering 260 MHz small-signal bandwidth, 160 MHz large-signal bandwidth (2 Vp-p), 1000 V/µs slew rate, and 3.8 nV/√Hz input voltage noise - enabling precision video line driving, ADC input buffering, and IF/RF signal conditioning in industrial and professional video systems.
For engineers reviewing the AD8048ARZ datasheet, AD8048ARZ pinout, AD8048ARZ application, or AD8048ARZ equivalent, key selection criteria include its G ≥ 2 stability requirement, SOIC-8 package compatibility, ±3 V to ±6 V dual-supply operation, 30 ns 0.01% settling time, and low harmonic distortion (–54 dBc at 20 MHz) critical for 12-bit/10 MSPS ADC interfaces and HDTV signal chains.
Technical Context
The AD8048ARZ employs a proprietary voltage feedback architecture that achieves current-feedback-like pulse response (30 ns to 0.01%) while retaining balanced high-impedance inputs essential for active filter design. Its open-loop gain rolls off at ~6 dB/octave, with gain-bandwidth product fixed at 250 V-MHz - meaning bandwidth scales inversely with closed-loop gain.
Stability requires minimum noise gain of 2; configuration as unity-gain follower is not permitted. Feedback resistor selection is critical: 200 Ω is specified for both RF and RG in G = +2 noninverting mode to ensure flat frequency response and minimal peaking. The device drives up to 50 pF capacitive loads directly but benefits from series output resistance (>10 Ω) when driving >25 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 260 MHz @ G = +2 - supports baseband video and IF sampling up to 130 MHz Nyquist zone. |
| Large-Signal Bandwidth | 160 MHz @ 2 Vp-p - enables clean amplification of fast video pulses and DAC output transients. |
| Slew Rate | 1000 V/µs - ensures minimal slewing distortion on 2 V step signals with <3.2 ns rise time. |
| Settling Time | 30 ns to 0.01% @ 2 V step - meets timing budget for 10 MSPS ADC drivers and video sync circuits. |
| Input Voltage Noise | 3.8 nV/√Hz - preserves SNR in low-level signal paths such as photodiode transimpedance stages. |
| Harmonic Distortion | –54 dBc @ 20 MHz, 2 Vp-p - maintains fidelity in professional video and communications baseband channels. |
| Supply Range | ±3 V to ±6 V - compatible with standard analog rails and allows headroom for ±2.8 V output swing into 150 Ω. |
| Quiescent Current | 5.9 mA typical - balances speed and power for thermally constrained PCB layouts. |
Pinout & Package
AD8048ARZ is housed in an 8-lead SOIC (R-8) package with exposed pad not electrically connected. Pin 1 is marked by a beveled corner or dot; pins are numbered counterclockwise. The package is RoHS-compliant and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Internally unconnected; must remain floating - no routing or grounding allowed. |
| 2 | Inverting Input (–) | High-impedance node requiring minimal stray capacitance (<1 pF); place feedback resistor adjacent. |
| 3 | Non-inverting Input (+) | High-impedance reference point; keep trace short and away from noisy nodes to preserve CMRR. |
| 4 | Negative Supply (–VS) | Return path for internal biasing; bypass with 0.1 µF ceramic + 4.7 µF tantalum close to pin. |
| 5 | No Connect | Internally unconnected; leave unpopulated and unconnected on PCB. |
| 6 | Output | Capable of ±3.0 V swing into 150 Ω; add 10–22 Ω series resistor when driving >25 pF loads. |
| 7 | Positive Supply (+VS) | Primary power rail; bypass identically to Pin 4 with low-inductance path to ground plane. |
| 8 | No Connect | Internally unconnected; must remain floating per datasheet metallization photos. |
Key Features
| Feature | Design Value |
|---|---|
| G ≥ 2 stability | Guarantees unconditional stability without external compensation in noninverting gain-of-two configurations. |
| 250 V-MHz gain-bandwidth product | Enables predictable bandwidth scaling: e.g., 125 MHz at G = +4, supporting multi-stage video gain blocks. |
| 0.01% settling in 30 ns | Meets timing closure for 10 MSPS ADC sampling clocks and video line sync pulses. |
| Differential gain/phase error | 0.01% / 0.02° @ 3.58 MHz - exceeds NTSC/PAL and HDTV broadcast linearity requirements. |
| Capacitive load drive | Stable into 50 pF without external isolation - simplifies layout for ADC buffer and filter output stages. |
| Low input current noise | 1.0 pA/√Hz - minimizes Johnson-Nyquist noise contribution in high-Z sensor interfaces. |
Applications
| Professional Video Line Driver | High-Speed ADC Input Buffer |
|---|---|
Use Scenario: Driving 75 Ω coaxial cable in SD/HD/3G-SDI broadcast equipment with minimal group delay variation across 0–100 MHz. IC Role / Device Role / Timing Role: Final-stage video amplifier providing gain-of-two, DC-coupled output with precise differential gain/phase matching. Use Value: 0.01% differential gain error and 0.02° phase error preserve color fidelity and luma/chroma alignment in real-time video processing. |
Use Scenario: Conditioning analog input to 12-bit, 10 MSPS ADCs (e.g., AD872A) in data acquisition systems with wide dynamic range. IC Role / Device Role / Timing Role: High-fidelity buffer isolating source impedance while delivering full-scale step response within 30 ns. Use Value: 30 ns 0.01% settling and –54 dBc distortion at 20 MHz prevent aperture uncertainty and harmonic folding in sampled systems. |
| IF/RF Signal Amplifier | Active Filter Building Block |
Use Scenario: Amplifying intermediate-frequency signals (e.g., 45 MHz IF in TV tuners) before demodulation or digitization. IC Role / Device Role / Timing Role: Wideband gain stage operating at G = +2 with flat 0.1 dB bandwidth up to 50 MHz. Use Value: 260 MHz small-signal bandwidth and 160 MHz large-signal bandwidth maintain signal integrity through amplitude-modulated IF envelopes. |
Use Scenario: Implementing 20 MHz multiple-feedback low-pass filters in medical imaging front-ends requiring high Q and low distortion. IC Role / Device Role / Timing Role: Voltage-feedback op amp enabling classical active filter topologies incompatible with current-feedback devices. Use Value: Balanced high-Z inputs and 250 MHz GBW allow accurate pole placement and >65° phase margin in demanding filter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed voltage feedback op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher 1.5 GHz GBW, lower 1.9 nV/√Hz noise, but requires G ≥ 5 for stability and draws 12.5 mA. | Better for >200 MHz IF amplification; unsuitable for G = +2 video line drivers due to instability. | Select LMH6629MA/NOPB only when gain ≥ 5 is acceptable and ultra-low noise dominates over power. |
| ADA4898-1ARZ | Lower 1.0 GHz GBW, 1.1 nV/√Hz noise, unity-gain stable, 100 mA output drive, but 22 ns settling to 0.1% only. | Preferred for precision unity-gain buffers and low-noise sensor interfaces; lacks AD8048ARZ's video-grade linearity. | Choose ADA4898-1ARZ for DC-critical, low-noise, unity-gain applications where video linearity is not required. |
Compared with LMH6629MA/NOPB and ADA4898-1ARZ, the AD8048ARZ uniquely balances G = +2 stability, 260 MHz bandwidth, 0.01% video linearity, and 5.9 mA quiescent current - making it the only option among the three qualified for broadcast-grade video line drivers and 10 MSPS ADC buffering without gain reconfiguration.
Availability
AD8048ARZ is available at Aetrix Electronics and suitable for professional video infrastructure, high-speed data acquisition, and IF/RF signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AD8048ARZ 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 Wilmington, MA.
The AD8048ARZ belongs to Analog Devices' high-speed voltage feedback op amp product line, engineered specifically for applications demanding wide bandwidth, fast settling, and video-grade linearity without current-feedback topology trade-offs.
FAQ
Is AD8048ARZ unity-gain stable?
No, AD8048ARZ is not unity-gain stable. It is explicitly designed for minimum noise gain of 2 (G ≥ +2) and will oscillate if configured as a unity-gain follower. The AD8047ARZ variant is unity-gain stable; for G = +1 applications, AD8047ARZ must be selected instead of AD8048ARZ. This distinction is fundamental to the AD8048ARZ's internal compensation and cannot be modified externally.
What is the maximum capacitive load AD8048ARZ can drive without external isolation?
The AD8048ARZ can drive up to 50 pF capacitive load directly while maintaining stability and specified transient performance. For loads exceeding 25 pF, Analog Devices recommends adding a 10–22 Ω series resistor between the output pin and the capacitive load to suppress peaking and preserve 0.01% settling time. This resistor value is validated in Figure 61 of the AD8048 datasheet under 27 pF load conditions.
Does AD8048ARZ support single-supply operation?
No, AD8048ARZ is specified exclusively for dual-supply operation from ±3 V to ±6 V. Its input common-mode voltage range is ±3.4 V and output swing is ±2.8 V into 150 Ω - both referenced to ground. Single-supply use would violate absolute maximum ratings and degrade distortion, bandwidth, and settling performance. For single-supply high-speed applications, consider the ADA4897-1 or ADA4807-1 families instead.
What feedback resistor values are recommended for AD8048ARZ in G = +2 configuration?
For optimal flatness and minimal peaking in noninverting G = +2 configuration, AD8048ARZ requires RF = RG = 200 Ω, as confirmed in the Feedback Resistor Choice section (Rev. B, p.15) and Figure 13. Using mismatched or higher-value resistors degrades 0.1 dB bandwidth and increases harmonic distortion. This 200 Ω value applies specifically to the SOIC-8 package (AD8048ARZ) and is distinct from AD8047's 0 Ω recommendation for unity gain.
Can AD8048ARZ replace AD8047ARZ in an existing design?
No, AD8048ARZ cannot directly replace AD8047ARZ without circuit modification. AD8047ARZ is unity-gain stable with 250 MHz bandwidth at G = +1, while AD8048ARZ requires G ≥ +2 and delivers 260 MHz at G = +2. Swapping them would cause oscillation in unity-gain circuits and alter gain, bandwidth, and noise performance. Board-level redesign - including feedback network adjustment - is mandatory for substitution.
AD8048ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 260 MHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 5.9mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8048ARZ FAQ
1.How can I place an order for AD8048ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8048ARZ 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 AD8048ARZ reliable?
The price and inventory of AD8048ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8048ARZ is usually 5 days.
3.What payment methods are accepted for AD8048ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8048ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8048ARZ?
AD8048ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8048ARZ 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 AD8048ARZ?
For technical support, including AD8048ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8048ARZ requirements.
6.How does Aetrix verify that AD8048ARZ is sourced from the original manufacturer or authorized distributors?
All AD8048ARZ 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 AD8048ARZ meets industry standards.
7.What is the process for return or replacement of AD8048ARZ?
All AD8048ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8048ARZ, 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 AD8048ARZ part is unused and in its original packaging.
Return procedure for AD8048ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8048ARZ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
