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Analog Devices Inc. AD8031BRZ-REEL7
- Part No.:
- AD8031BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8031BRZ-REEL7.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,007
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Product details
Overview
AD8031BRZ-REEL7 from Analog Devices is a single-channel, rail-to-rail input/output voltage feedback operational amplifier optimized for high-speed, low-power applications. It delivers 80 MHz −3 dB bandwidth (G = +1), 30 V/μs slew rate, and 125 ns settling time to 0.1%, operating from a single 2.7 V supply with only 800 μA quiescent current per amplifier. It is widely used as an A/D converter buffer in portable test instruments and battery-powered systems.
For engineers reviewing the AD8031BRZ-REEL7 datasheet, AD8031BRZ-REEL7 pinout, AD8031BRZ-REEL7 application, or AD8031BRZ-REEL7 equivalent, key selection criteria include rail-to-rail I/O swing within 20 mV of rails, input common-mode range extending 200 mV beyond supplies, THD of −62 dBc at 1 MHz, and guaranteed operation over −40°C to +85°C industrial temperature range.
Technical Context
The AD8031BRZ-REEL7 employs a proprietary eXtra Fast Complementary Bipolar (XFCB) process and dual-input-stage architecture-switching between PNP and NPN differential pairs-to maintain transconductance and bandwidth across rail-to-rail input common-mode range. This enables operation with inputs up to 500 mV beyond either supply without phase reversal.
Its rail-to-rail output stage uses common-emitter transistors with ~25 Ω collector resistance, delivering 15 mA output current while sustaining <20 mV saturation voltage into light loads. Open-loop gain remains stable within 250 mV of VS+ and 150 mV of VS−, then declines linearly under heavy saturation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 80 MHz at G = +1 - supports high-fidelity signal conditioning up to video and medium-speed data acquisition frequencies. |
| Slew Rate | 30 V/μs - enables clean amplification of fast transient signals without slew-induced distortion. |
| Supply Current | 800 μA per amplifier - allows integration into ultra-low-power, battery-operated systems with multi-stage analog front-ends. |
| Input CMVR | Extends 200 mV beyond rails - permits direct interfacing with sensors or DACs operating near supply limits. |
| Output Swing | Within 20 mV of either rail (RL = 10 kΩ) - maximizes dynamic range in single-supply ADC buffering applications. |
| THD @ 1 MHz | −62 dBc (2 Vp-p) - meets SNR requirements for 10-bit+ data conversion when driving SAR or sigma-delta ADCs. |
| Settling Time | 125 ns to 0.1% - ensures accurate sampling in high-throughput data acquisition systems with >1 MSPS throughput. |
Pinout & Package
AD8031BRZ-REEL7 is housed in an 8-lead SOIC_N (R) package with standard pinout and no internal connections on pins 1, 5, and 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Not bonded; must be left floating or tied to ground for mechanical stability only. |
| 2 (–IN) | Inverting Input | Differential input node; accepts signals up to 500 mV beyond either supply rail without phase reversal. |
| 3 (+IN) | Non-inverting Input | Differential input node; shares same rail-to-rail common-mode range and overvoltage tolerance as –IN. |
| 4 (–VS) | Negative Supply | Ground reference for single-supply operation; supports true 0 V input common-mode down to −0.5 V. |
| 5 (NC) | No Connect | Not bonded; electrically isolated and must not be connected. |
| 6 (OUT) | Amplifier Output | Capable of sourcing/sinking 15 mA; swings within 20 mV of rails into 10 kΩ load. |
| 7 (+VS) | Positive Supply | Accepts 2.7 V to 12 V single supply or ±1.35 V to ±6 V dual supply; PSRR ≥ 75 dB. |
| 8 (NC) | No Connect | Not bonded; no electrical function; leave unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Input common-mode voltage range extends −0.2 V to +2.9 V on +2.7 V supply - eliminates level-shifting circuitry for sensor interfaces. |
| Rail-to-rail output | Output swings to within 20 mV of either rail into 10 kΩ - preserves full-scale resolution when driving 12-bit ADC references. |
| Low power consumption | 800 μA quiescent current at +2.7 V - enables >100-hour battery life in handheld instrumentation with multiple amplifiers. |
| No phase reversal | Operates cleanly with inputs up to 500 mV beyond supplies - prevents latch-up or signal corruption in overvoltage fault conditions. |
| High-speed settling | 125 ns to 0.1% with 2 V step - satisfies timing budgets in multiplexed data acquisition systems with >1 MSPS aggregate sampling. |
Applications
| Portable Test Instruments | A/D Converter Buffering |
|---|---|
Use Scenario: Handheld oscilloscope front-end amplifying sensor or probe signals before digitization. IC Role / Device Role / Timing Role: Signal-conditioning amplifier providing gain, bandwidth, and DC-level translation prior to ADC sampling. Use Value: Rail-to-rail I/O and 80 MHz bandwidth preserve signal fidelity across full input range without clipping or delay-induced timing errors. | Use Scenario: Driving the input of a 12-bit SAR ADC in a battery-powered data logger. IC Role / Device Role / Timing Role: Unity-gain buffer isolating ADC input capacitance from source impedance to prevent sampling error. Use Value: 125 ns settling ensures accurate acquisition within ADC aperture time; 800 μA supply current minimizes system power overhead. |
| Active Filters | High-Speed Set-and-Forget Amplifiers |
Use Scenario: Second-order biquad band-pass filter in spectrum analyzer IF stage requiring low distortion and wide dynamic range. IC Role / Device Role / Timing Role: Active gain element defining filter Q and center frequency with minimal group delay variation. Use Value: −62 dBc THD at 1 MHz and flat 80 MHz bandwidth enable clean passband response without harmonic folding. | Use Scenario: Fixed-gain signal conditioning stage in automated test equipment where output must settle rapidly after configuration change. IC Role / Device Role / Timing Role: Precision gain block with fast settling and low offset drift for repeatable measurement accuracy. Use Value: 125 ns settling and ±1.5 mV max VOS (AD8031A grade) ensure sub-microsecond stabilization and <0.01% gain error over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6612MM/NOPB | Higher supply current (1.1 mA), wider bandwidth (160 MHz), but no rail-to-rail input; input CMVR limited to 1.2 V below VS+. | Less suitable for true single-supply sensor interfaces requiring input beyond rails; better for higher-bandwidth AC-coupled applications. | Select LMH6612MM/NOPB only when bandwidth >100 MHz is required and rail-to-rail input is unnecessary. |
| ADA4891-1ARJZ-R7 | Lower quiescent current (650 μA), same rail-to-rail I/O, but reduced bandwidth (80 MHz typ. at G = +1, 20 MHz min.), lower output drive (60 mA). | Better for ultra-low-power portable devices where 20–50 MHz bandwidth suffices; less robust driving capacitive loads >100 pF. | Choose ADA4891-1ARJZ-R7 when power budget is tighter than 800 μA and full 80 MHz bandwidth is not required. |
Compared with LMH6612MM/NOPB and ADA4891-1ARJZ-R7, AD8031BRZ-REEL7 uniquely balances 80 MHz bandwidth, rail-to-rail input capability, and 800 μA supply current - making it optimal for precision, single-supply, battery-constrained systems needing full input voltage range coverage.
Availability
AD8031BRZ-REEL7 is available at Aetrix Electronics and suitable for portable test instruments, A/D converter buffering, and active filter design requiring stable component supply and guaranteed long-term industrial temperature support.
Supply support for AD8031BRZ-REEL7 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 AD8031 is part of Analog Devices' high-speed, low-power op-amp product line designed specifically for single-supply, rail-to-rail signal conditioning in portable and space-constrained instrumentation systems.
FAQ
What supply voltage range does the AD8031BRZ-REEL7 support?
The AD8031BRZ-REEL7 operates from a single supply of +2.7 V to +12 V or dual supplies of ±1.35 V to ±6 V. It is fully specified at +2.7 V, +5 V, and ±5 V, with guaranteed performance across the industrial temperature range (−40°C to +85°C). At +2.7 V, it draws only 800 μA while maintaining 80 MHz bandwidth and rail-to-rail I/O functionality - enabling use in coin-cell or Li-ion powered devices.
Does the AD8031BRZ-REEL7 have rail-to-rail input capability?
Yes, the AD8031BRZ-REEL7 features true rail-to-rail input with common-mode voltage range extending 200 mV beyond both supply rails. On a +2.7 V supply, this means the input accepts voltages from −0.2 V to +2.9 V. Its dual-input-stage architecture switches between PNP and NPN pairs to maintain bandwidth and avoid phase reversal - allowing reliable operation even when inputs exceed supplies by up to 500 mV.
What is the maximum output current drive capability of the AD8031BRZ-REEL7?
The AD8031BRZ-REEL7 delivers ±15 mA continuous output current. Short-circuit current is +21 mA (sourcing) and −34 mA (sinking) on +2.7 V supply. Output swing degrades linearly with load: at 1 kΩ, it swings to within 0.08 V of the negative rail and 2.6 V of the positive rail. For optimal rail-to-rail performance, keep load impedance ≥10 kΩ - where output swing is within 20 mV of either rail.
Can the AD8031BRZ-REEL7 drive capacitive loads?
The AD8031BRZ-REEL7 can directly drive up to 15 pF capacitive load with G = +2 while maintaining stability, as verified in Figure 46 of the datasheet. For larger loads (e.g., ADC input capacitance + PCB trace), external isolation resistance (typically 20–50 Ω in series with output) is recommended. Unlike many high-speed op-amps, it does not require full compensation networks - simplifying layout in compact portable designs.
Is the AD8031BRZ-REEL7 suitable for driving ADC inputs?
Yes, the AD8031BRZ-REEL7 is explicitly optimized for A/D converter buffering. Its 125 ns settling time to 0.1%, rail-to-rail output swing, low THD (−62 dBc at 1 MHz), and ability to drive typical ADC input capacitances make it ideal for driving SAR and sigma-delta ADCs. The AD8031BRZ-REEL7 maintains signal integrity during acquisition windows and avoids distortion-induced code errors - especially critical in 12-bit and higher-resolution systems.
AD8031BRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 35V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 80 MHz
- Current - Input Bias:
- 450 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 900µA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8031BRZ-REEL7 FAQ
1.How can I place an order for AD8031BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8031BRZ-REEL7 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 AD8031BRZ-REEL7 reliable?
The price and inventory of AD8031BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8031BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8031BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8031BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8031BRZ-REEL7?
AD8031BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8031BRZ-REEL7 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 AD8031BRZ-REEL7?
For technical support, including AD8031BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8031BRZ-REEL7 requirements.
6.How does Aetrix verify that AD8031BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8031BRZ-REEL7 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 AD8031BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8031BRZ-REEL7?
All AD8031BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8031BRZ-REEL7, 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 AD8031BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8031BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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