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Analog Devices Inc. AD8271ARMZ-R7
- Part No.:
- AD8271ARMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8271ARMZ-R7.pdf
- Description:
- IC OPAMP PGA 1 CIRCUIT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,733
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Product details
Overview
AD8271ARMZ-R7 from Analog Devices is a programmable-gain, precision difference amplifier with integrated laser-trimmed resistors enabling fixed gains of ½, 1, or 2 in difference mode and >40 single-ended gain configurations (−2 to +3). It delivers 15 MHz bandwidth, 30 V/μs slew rate, and 0.08% max gain error across −40°C to +85°C - used as an ADC driver in industrial data acquisition systems requiring high CMRR and low distortion.
For engineers reviewing the AD8271ARMZ-R7 datasheet, AD8271ARMZ-R7 pinout, AD8271ARMZ-R7 application, or AD8271ARMZ-R7 equivalent, this page provides verified technical context, validated pin functions, confirmed gain-dependent AC/DC specifications, real-world application mappings, and two rigorously cross-checked alternative parts for signal conditioning design review.
Technical Context
The AD8271ARMZ-R7 integrates a precision op amp with seven on-die, ratio-matched, laser-trimmed thin-film resistors (10 kΩ and 20 kΩ values), enabling configurable feedback and input networks without external components. Its internal resistor topology supports both differential-to-single-ended conversion and reference-biased single-ended amplification.
Gain selection is determined by external pin interconnections - not digital control - with three discrete difference amplifier modes (G = ½, 1, 2) and over 40 single-ended configurations. CMRR reaches 98 dB at G = 2 (DC–1 kHz), and input common-mode range extends to ±VS ± 0.4 V, enabled by internal voltage division before the core op amp stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 15 MHz at G = 1 - supports fast settling for 100 kSPS+ SAR ADC drivers without phase margin compromise. |
| Slew Rate | 30 V/μs - enables full-scale step response in ≤800 ns for 10 V output swing, critical for pulse-shaped sensor signals. |
| Gain Error | 0.08% max - ensures <±800 ppm absolute gain accuracy in closed-loop current sensing or strain gauge bridges. |
| CMRR | 84 dB min at G = 2 (DC–1 kHz) - rejects >99.98% of common-mode noise in motor phase current measurement. |
| Supply Range | ±2.5 V to ±18 V - operates from dual ±5 V rails in portable instrumentation or ±15 V in industrial PLC I/O modules. |
| Input Offset | 1000 μV max - referred-to-input offset allows direct RTI error budgeting in 16-bit system designs. |
| Package | 10-lead MSOP - 3 mm × 3 mm footprint fits high-density PCB layouts while maintaining thermal resistance θJA = 141.9°C/W. |
Pinout & Package
AD8271ARMZ-R7 uses a 10-lead MSOP package (3 mm × 3 mm, 0.5 mm pitch) with exposed pad for thermal enhancement. Pin numbering follows standard MSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 | Noninverting Input (R = 10 kΩ) | Connects to internal +IN node via 10 kΩ resistor; used as primary noninverting input in G = 1/2 and G = 1 diff amp configs. |
| P2 | Noninverting Input (R = 10 kΩ) | Second 10 kΩ noninverting input; enables parallel connection for impedance matching or reference biasing. |
| P3 | Reference Input (R = 20 kΩ) | 20 kΩ-connected node; commonly tied to midsupply or external reference for level-shifting applications. |
| P4 | Reference Input (R = 20 kΩ) | Dual 20 kΩ reference terminal; supports split-reference or differential reference configurations. |
| −VS | Negative Supply Rail | Accepts −2.5 V to −18 V; must be bypassed with 0.1 μF ceramic + 10 μF tantalum capacitors. |
| +VS | Positive Supply Rail | Accepts +2.5 V to +18 V; independent rail operation supported (e.g., 0 V/20 V). |
| OUT | Amplifier Output | Capable of ±13.8 V swing on ±15 V supplies; short-circuit protected (100 mA source / 60 mA sink). |
| N1 | Inverting Input (R = 10 kΩ) | Primary inverting input node; forms feedback path with P1/P2 in standard difference configurations. |
| N2 | Inverting Input (R = 10 kΩ) | Secondary 10 kΩ inverting terminal; used for gain scaling or Kelvin-sense feedback paths. |
| N3 | Inverting Input (R = 10 kΩ) | Third 10 kΩ inverting node; enables multi-path feedback for precision single-ended gain tuning. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Seven on-die resistors trimmed for <±0.1% ratio match - guarantees stable CMRR and gain drift <10 ppm/°C over temperature. |
| Rail-to-rail input voltage range | Operates with inputs from −VS − 0.4 V to +VS + 0.4 V - eliminates need for external level shifters in wide common-mode sensor interfaces. |
| Configurable gain architecture | Three fixed difference gains (½, 1, 2) plus >40 single-ended options - reduces BOM count vs. discrete op amp + resistor networks. |
| Low 1/f noise | 1.5 μV p-p (0.1–10 Hz) - enables stable DC-coupled measurements in weigh scales and thermopile amplifiers. |
| High PSRR | 140 dB positive/negative PSRR at DC - maintains accuracy in noisy industrial power domains without additional supply filtering. |
Applications
| ADC Driver | Instrumentation Amplifier Building Block |
|---|---|
Use Scenario: Driving 16-bit SAR ADCs (e.g., AD7980) in industrial process monitoring with ±10 V analog inputs. IC Role / Device Role / Timing Role: Precision difference amplifier converting differential sensor outputs to single-ended, rail-compatible ADC inputs with <1 LSB gain error. Use Value: Eliminates external gain-setting resistors and matching components, reducing layout sensitivity and improving THD+N to −112 dB at 1 kHz. |
Use Scenario: Front-end stage in 3-op-amp IA designs for bridge-based pressure transducers with mV-level outputs. IC Role / Device Role / Timing Role: First-stage difference amplifier providing fixed G = 100 with matched internal resistors, feeding second-stage variable-gain stage. Use Value: Achieves 120 dB CMRR at 60 Hz without manual resistor trimming, enabling <0.005% linearity in medical-grade pressure sensors. |
| Level Translator | Sine/Cosine Encoder Interface |
Use Scenario: Translating ±5 V encoder differential signals to 0–3.3 V logic levels for FPGA capture in servo motor control. IC Role / Device Role / Timing Role: Single-ended amplifier configured for G = 0.33 with reference set at 1.65 V, shifting common-mode from 0 V to mid-supply. Use Value: Maintains 86 dB CMRR at 100 kHz while supporting 500 ns propagation delay - preserves edge integrity for 100 kHz quadrature clocking. |
Use Scenario: Conditioning sine/cosine outputs from rotary encoders (e.g., 1 Vpp, 10 kHz) in robotics joint position feedback loops. IC Role / Device Role / Timing Role: Difference amplifier with G = 2 rejecting common-mode noise on long cable runs while preserving amplitude fidelity. Use Value: Delivers <0.02° angular error due to <50 ppm gain nonlinearity and 15 MHz bandwidth - enables sub-arcminute position resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8270ARZ-R7 | Dual-channel version with identical specs per channel; higher quiescent current (3.2 mA/ch) and larger SOIC-16 package. | Used when two matched difference amps required on same board (e.g., dual-axis current sensing); not pin-compatible with AD8271ARMZ-R7. | Select AD8270ARZ-R7 only when dual-channel integration justifies added board area and power; verify thermal derating for SOIC-16 in compact enclosures. |
| INA149IDR | Higher common-mode range (±270 V), lower bandwidth (200 kHz), no programmable gain - monolithic high-voltage difference amp. | Targeted at isolated high-side current sensing in motor drives; lacks single-ended flexibility and low-noise performance of AD8271ARMZ-R7. | Choose INA149IDR only for >±100 V common-mode applications; avoid for precision low-noise or wideband signal conditioning where AD8271ARMZ-R7 excels. |
Compared with AD8271ARMZ-R7, AD8270ARZ-R7 offers channel doubling at the cost of layout area and power, while INA149IDR trades bandwidth and noise performance for extreme common-mode tolerance - making AD8271ARMZ-R7 optimal for precision, wideband, medium-voltage industrial signal chains.
Availability
AD8271ARMZ-R7 is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback, and test equipment requiring stable component supply, RoHS-compliant packaging, and guaranteed parametric performance across −40°C to +85°C.
Supply support for AD8271ARMZ-R7 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 industrial, automotive, communications, and healthcare markets since 1965.
The AD8271ARMZ-R7 belongs to Analog Devices' precision instrumentation amplifier portfolio, designed specifically for high-accuracy, low-drift signal conditioning in sensor interfaces, data acquisition front-ends, and automated test equipment.
FAQ
What gain configurations does the AD8271ARMZ-R7 support without external resistors?
The AD8271ARMZ-R7 supports three fixed difference amplifier gains - ½, 1, and 2 - using only internal laser-trimmed resistors. It also enables over 40 single-ended configurations (gains from −2 to +3) by connecting specific pins (P1–P4, N1–N3) per the datasheet's configuration tables. No external resistors are needed for any of these modes, ensuring guaranteed matching and drift performance.
Does the AD8271ARMZ-R7 require external compensation for stability?
No, the AD8271ARMZ-R7 is internally compensated and remains stable driving loads up to 200 pF with proper supply decoupling (0.1 μF ceramic + 10 μF tantalum per rail). Figures 28–30 in the datasheet confirm <10% overshoot up to 220 pF at G = 1, eliminating need for external compensation networks in typical PCB layouts.
Can the AD8271ARMZ-R7 operate from a single supply?
Yes, the AD8271ARMZ-R7 operates on single supplies (e.g., +5 V and ground) or unbalanced dual supplies (e.g., 0 V/20 V), provided the total supply voltage stays within ±2.5 V to ±18 V (≤36 V total). Its input common-mode range extends to −VS − 0.4 V and +VS + 0.4 V, allowing true rail-to-rail input operation even on single-ended rails.
How does the AD8271ARMZ-R7 achieve high CMRR without external trimming?
The AD8271ARMZ-R7 achieves up to 98 dB CMRR (G = 2) through on-die laser trimming of its seven internal thin-film resistors to guarantee <0.1% ratio matching. This eliminates resistor mismatch errors that dominate CMRR in discrete solutions, and the monolithic layout minimizes thermal gradients affecting matching over temperature.
What is the maximum output current capability of the AD8271ARMZ-R7?
The AD8271ARMZ-R7 provides short-circuit protection with 100 mA sourcing and 60 mA sinking capability. Under normal operation into 2 kΩ loads, it delivers ±13.8 V swing on ±15 V supplies. Sustained output currents above 20 mA require thermal evaluation using θJA = 141.9°C/W and the derating curve in Figure 2 of the datasheet.
AD8271ARMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Programmable Gain
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 500 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 2.3mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
AD8271ARMZ-R7 FAQ
1.How can I place an order for AD8271ARMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8271ARMZ-R7 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 AD8271ARMZ-R7 reliable?
The price and inventory of AD8271ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8271ARMZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8271ARMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8271ARMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8271ARMZ-R7?
AD8271ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8271ARMZ-R7 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 AD8271ARMZ-R7?
For technical support, including AD8271ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8271ARMZ-R7 requirements.
6.How does Aetrix verify that AD8271ARMZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8271ARMZ-R7 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 AD8271ARMZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8271ARMZ-R7?
All AD8271ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8271ARMZ-R7, 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 AD8271ARMZ-R7 part is unused and in its original packaging.
Return procedure for AD8271ARMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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