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Analog Devices Inc. AD8221TRMZ-EP-R7
- Part No.:
- AD8221TRMZ-EP-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8221TRMZ-EP-R7.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
AD8221TRMZ-EP-R7 from Analog Devices is a military-grade precision instrumentation amplifier with programmable gain (1–1000), 80 dB minimum CMRR up to 10 kHz at G = 1, 0.9 μV/°C max input offset drift, and operation across −55°C to +125°C - used in aerospace bridge amplifiers and high-reliability strain gage signal conditioning.
For engineers reviewing the AD8221TRMZ-EP-R7 datasheet, AD8221TRMZ-EP-R7 pinout, AD8221TRMZ-EP-R7 application, or AD8221TRMZ-EP-R7 equivalent, this page delivers verified military-spec performance data, MSOP-8 terminal mapping, gain-setting resistor interface details, and direct alternatives for defense-grade analog signal acquisition.
Technical Context
The AD8221TRMZ-EP-R7 employs a three-op-amp architecture with laser-trimmed thin-film resistors to achieve 10 ppm/°C max gain drift and 80 dB DC–60 Hz CMRR. Its input stage uses super-beta transistors enabling 2 nA max input bias current and 100 GΩ||2 pF common-mode input impedance.
Gain is set externally via a single resistor across Pins 2 and 3 (RG), following G = 1 + 49.4 kΩ/RG. The REF pin supports precise output level-shifting, while ±2.3 V to ±18 V dual-supply operation accommodates ±10 V input signals without clipping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CMRR (DC–60 Hz) | 80 dB min - rejects low-frequency interference in bridge circuits with unbalanced source impedances. |
| CMRR (at 10 kHz) | 80 dB min - maintains noise immunity against line harmonics and switching noise up to 10 kHz. |
| Input Offset Voltage | 70 μV max - ensures ≤0.007% error in 1 V full-scale bridge outputs at room temperature. |
| Input Voltage Noise | 8 nV/√Hz at 1 kHz - enables sub-μV resolution in low-frequency sensor measurements. |
| Small-Signal Bandwidth | 825 kHz typical at G = 1 - supports fast transient capture in dynamic strain monitoring. |
| Slew Rate | 2 V/μs typical - handles 10 V step inputs with ≤10 μs settling to 0.01% at G = 1–100. |
| Supply Range | ±2.3 V to ±18 V - interfaces directly with legacy ±15 V systems and modern low-voltage rails. |
| Operating Temperature | −55°C to +125°C - qualified per AQEC standard for launch-critical and embedded avionics use. |
Pinout & Package
AD8221TRMZ-EP-R7 is housed in an 8-lead MSOP (RM-8) package, 3.0 mm × 3.0 mm × 1.1 mm, compliant with JEDEC MO-187-AA and rated for 135°C/W junction-to-ambient thermal resistance on a 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative Input Terminal | Differential input node; connects to low-side of Wheatstone bridge or transducer. |
| 2, 3 (RG) | Gain Setting Terminal | Resistor connection points; sets gain from 1 to 1000 via G = 1 + 49.4 kΩ/RG. |
| 4 (+IN) | Positive Input Terminal | Differential input node; connects to high-side of bridge or reference leg. |
| 5 (−VS) | Negative Power Supply | Accepts −2.3 V to −18 V; must be decoupled locally to minimize PSRR degradation. |
| 6 (REF) | Reference Voltage Input | Drives output common-mode level; requires low-impedance source (≤10 Ω) for accuracy. |
| 7 (VOUT) | Amplified Output | Delivers rail-to-rail capable output swing; drives 2 kΩ loads with <0.01% nonlinearity. |
| 8 (+VS) | Positive Power Supply | Accepts +2.3 V to +18 V; pairs with Pin 5 for symmetrical or asymmetrical supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced Product Qualification | Qualified to AQEC standards with controlled fab/assembly/test sites and military temp range (−55°C to +125°C). |
| High-Frequency CMRR Retention | Maintains ≥80 dB CMRR up to 10 kHz - reduces need for external notch filters in EMI-prone environments. |
| Ultra-Low Offset Drift | 0.9 μV/°C max - limits thermal-induced error to <100 μV over full military temperature range. |
| Programmable Gain Interface | Single external resistor (RG) sets gain from 1 to 1000 - eliminates trimming and simplifies BOM management. |
| Low Input Bias Current | 2 nA max - prevents significant voltage drop across high-impedance sensor sources (e.g., piezoresistive elements). |
Applications
| Aerospace Strain Monitoring | Defense Bridge Amplification |
|---|---|
|
Use Scenario: Real-time structural load measurement on flight control surfaces using bonded foil strain gages. IC Role / Device Role / Timing Role: Precision differential amplifier conditioning microvolt-level bridge imbalances under vibration and thermal cycling. Use Value: 80 dB CMRR at 10 kHz rejects engine harmonics; −55°C to +125°C rating ensures operation during stratospheric ascent and re-entry. |
Use Scenario: Weapon system pressure transducer signal conditioning in armored vehicle fire-control electronics. IC Role / Device Role / Timing Role: High-stability gain block converting millivolt-level piezoresistive outputs into robust 0–5 V ADC inputs. Use Value: 70 μV max input offset and 10 ppm/°C gain drift ensure <0.01% full-scale error across battlefield ambient extremes. |
| Precision Data Acquisition | Transducer Interface Module |
|
Use Scenario: High-resolution ground telemetry unit acquiring geotechnical sensor data from deep-borehole strainmeters. IC Role / Device Role / Timing Role: Low-noise front-end amplifier with RTI noise of 0.25 μV p-p (G = 100–1000) for sub-nanostrain resolution. Use Value: 8 nV/√Hz input voltage noise and 0.9 μV/°C offset TC enable stable 24-bit digitization without recalibration. |
Use Scenario: Modular industrial transducer interface card for factory-floor load cells and torque sensors. IC Role / Device Role / Timing Role: Configurable gain amplifier supporting multiple sensor sensitivities via RG resistor selection. Use Value: Single-resistor gain programming (G = 1–1000) allows one PCB design to serve 1 mV/V to 100 mV/V transducers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA128HP | Wider supply range (±2.25 V to ±18 V), but only 60 dB CMRR at 10 kHz and −40°C to +125°C rating. | Lacks AQEC qualification and fails military temp compliance below −40°C; unsuitable for space launch systems. | Select when cost sensitivity outweighs extended cold-temperature performance and CMRR bandwidth requirements. |
| AD8421ARMZ | Higher CMRR (100 dB at 10 kHz), lower noise (5.5 nV/√Hz), but fixed G = 10/100/1000 options and no RG pin flexibility. | Requires PCB redesign for gain changes; lacks single-resistor field tuning capability of AD8221TRMZ-EP-R7. | Select when maximum CMRR and lowest noise are critical, and gain is fixed per system configuration. |
Compared with INA128HP and AD8421ARMZ, AD8221TRMZ-EP-R7 uniquely balances military temperature compliance, wideband CMRR, and field-programmable gain - making it optimal for upgradable defense electronics where gain adaptation and extreme environmental resilience are both required.
Availability
AD8221TRMZ-EP-R7 is available at Aetrix Electronics and suitable for aerospace structural monitoring, defense transducer interfacing, and precision industrial data acquisition requiring stable component supply across extended temperature and long product lifecycles.
Supply support for AD8221TRMZ-EP-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 precision instrumentation, industrial automation, and defense markets since 1965.
The AD8221-EP product line delivers radiation-tolerant, temperature-hardened instrumentation amplifiers engineered specifically for mission-critical aerospace and defense signal conditioning where reliability cannot be compromised.
FAQ
What is the exact package type and footprint compatibility of AD8221TRMZ-EP-R7?
AD8221TRMZ-EP-R7 uses an 8-lead MSOP package (JEDEC MO-187-AA, RM-8 variant) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad omitted. It shares footprint and solder profile compatibility with industry-standard MSOP-8 devices including AD8220, AD8226, and INA128, though thermal and electrical validation is required before substitution.
Does AD8221TRMZ-EP-R7 support single-supply operation?
Yes, AD8221TRMZ-EP-R7 operates on single supplies from +4.6 V to +36 V (V+ to GND), provided the REF pin is biased appropriately and input common-mode voltage remains within specified limits (e.g., −VS + 1.9 V to +VS − 1.2 V). Full specifications apply only under dual-supply conditions per datasheet test setup.
What is the recommended layout practice for the RG pins on AD8221TRMZ-EP-R7?
For AD8221TRMZ-EP-R7, place the RG resistor directly between Pins 2 and 3 with minimal trace length (<2 mm), avoid routing near noisy signals or power planes, and use a 1% metal-film or thin-film resistor. Guarding the RG node is unnecessary due to internal high-impedance buffering, but thermal symmetry around the resistor improves gain drift performance.
How does the REF pin affect output accuracy in AD8221TRMZ-EP-R7?
The REF pin on AD8221TRMZ-EP-R7 directly adds to the output voltage (VOUT = G × (V+IN − V−IN) + VREF), with 1 ppm/V gain error and 100 kΩ input impedance. To maintain accuracy, drive REF with a low-impedance source (<10 Ω) - e.g., op-amp buffer or precision DAC - and bypass to ground with 100 nF ceramic capacitor close to Pin 6.
Is AD8221TRMZ-EP-R7 pin-compatible with commercial-grade AD8221ARMZ?
Yes, AD8221TRMZ-EP-R7 is pin-compatible with AD8221ARMZ and AD8221BRMZ: all share identical 8-lead MSOP pinout, terminal functions, and gain-setting methodology. However, AD8221TRMZ-EP-R7 adds AQEC qualification, extended temperature screening, and enhanced change notification - requiring separate qualification for flight hardware use.
AD8221TRMZ-EP-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 825 kHz
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 900µA
- Current - Output / Channel:
- 18 mA
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8221TRMZ-EP-R7 FAQ
1.How can I place an order for AD8221TRMZ-EP-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8221TRMZ-EP-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 AD8221TRMZ-EP-R7 reliable?
The price and inventory of AD8221TRMZ-EP-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8221TRMZ-EP-R7 is usually 5 days.
3.What payment methods are accepted for AD8221TRMZ-EP-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8221TRMZ-EP-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8221TRMZ-EP-R7?
AD8221TRMZ-EP-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8221TRMZ-EP-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 AD8221TRMZ-EP-R7?
For technical support, including AD8221TRMZ-EP-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8221TRMZ-EP-R7 requirements.
6.How does Aetrix verify that AD8221TRMZ-EP-R7 is sourced from the original manufacturer or authorized distributors?
All AD8221TRMZ-EP-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 AD8221TRMZ-EP-R7 meets industry standards.
7.What is the process for return or replacement of AD8221TRMZ-EP-R7?
All AD8221TRMZ-EP-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8221TRMZ-EP-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 AD8221TRMZ-EP-R7 part is unused and in its original packaging.
Return procedure for AD8221TRMZ-EP-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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