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Analog Devices Inc. AD8251ARMZ
- Part No.:
- AD8251ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8251ARMZ.pdf
- Description:
- IC INST AMP 1 CIRCUIT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:721
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Product details
Overview
AD8251ARMZ from Analog Devices is a programmable gain instrumentation amplifier (PGIA) with iCMOS® process technology, offering selectable gains of 1, 2, 4, and 8, 10 MHz bandwidth at G = 1, 20 V/μs minimum slew rate, and 98 dB minimum CMRR at G = 8 - designed for high-precision sensor signal conditioning in data acquisition systems.
For engineers reviewing the AD8251ARMZ datasheet, AD8251ARMZ pinout, AD8251ARMZ application, or AD8251ARMZ equivalent, this page delivers verified specifications, functional context for gain programming modes, real-world application mapping, and validated alternative options for precision analog front-end design.
Technical Context
The AD8251ARMZ implements a classic 3-op-amp topology with laser-trimmed internal resistor arrays enabling precise, digitally set gains. Its iCMOS® process ensures robustness against latch-up and supports wide supply operation (±5 V to ±15 V).
It supports two digital gain control modes: transparent mode (gain changes immediately with A0/A1 logic levels when WR = −VS) and latched mode (gain updates on WR falling edge), with guaranteed 325 ns gain switching time and ≤785 ns settling to 0.001% for full-scale steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gains | Programmable via digital inputs: G = 1, 2, 4, 8 - enables dynamic range optimization without hardware change. |
| Small-signal bandwidth | 10 MHz at G = 1 - supports high-speed sensor signals and fast ADC sampling up to ~1 MSPS. |
| Slew rate | ≥20 V/μs at G = 1 - ensures faithful reproduction of fast transients without slewing distortion. |
| CMRR | ≥98 dB at G = 8, DC–60 Hz; ≥80 dB at G = 1 up to 50 kHz - critical for rejecting noise in noisy industrial environments. |
| Input offset drift | ≤1.8 μV/°C at G = 8 - maintains accuracy across temperature without recalibration. |
| Settling time | ≤785 ns to 0.001% for 10 V step - meets timing budgets for high-resolution SAR ADC drivers. |
| THD + N | −110 dB at 1 kHz, 10 V swing - preserves signal fidelity in precision measurement applications. |
Pinout & Package
AD8251ARMZ is housed in a 10-lead MSOP package (3 mm × 3 mm, 0.5 mm pitch), optimized for high-density PCB layouts and thermal performance in industrial and test equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting input | True differential input node; matched impedance improves CMRR over frequency. |
| 2 (DGND) | Digital ground reference | Separate ground for logic interface; must be tied to system ground with low-impedance path. |
| 3 (−VS) | Negative supply rail | Accepts −5 V to −15 V; powers internal amplifiers and bias circuitry. |
| 4 (A0) | Gain LSB input | Logic-controlled pin; sets gain bit 0 in both transparent and latched modes. |
| 5 (A1) | Gain MSB input | Logic-controlled pin; sets gain bit 1; combined with A0 defines gain per truth table. |
| 6 (WR) | Write enable / latch control | Low = transparent mode; falling edge = latched mode; determines gain update timing. |
| 7 (OUT) | Amplified output | Single-ended output capable of ±13.5 V swing into 2 kΩ load at ±15 V supplies. |
| 8 (+VS) | Positive supply rail | Accepts +5 V to +15 V; supplies all internal amplifiers and output stage. |
| 9 (REF) | Reference voltage input | DC offset adjustment point; gain from REF to OUT is unity; allows level-shifting. |
| 10 (+IN) | Noninverting input | True differential input node; high common-mode range (−VS + 1.5 V to +VS − 1.5 V). |
Key Features
| Feature | Design Value |
|---|---|
| iCMOS® process integration | Enables ±15 V operation with latch-up immunity and stable performance across temperature. |
| Dual gain programming modes | Transparent mode for immediate gain change; latched mode for synchronized multi-device control on shared bus. |
| Ultra-low input bias current | 5–30 nA typical - minimizes error when interfacing high-impedance sensors (e.g., piezoresistive bridges). |
| Low 0.1 Hz–10 Hz noise | 1.2 μV p-p at G = 8 - essential for dc-coupled biomedical and strain-gauge measurements. |
| Laser-trimmed resistor array | Guarantees ≤0.04% gain error at G = 2, 4, 8 - eliminates need for external calibration. |
Applications
| Data Acquisition Systems | Biomedical Instrumentation |
|---|---|
Use Scenario: High-channel-count DAQ modules acquiring signals from thermocouples, RTDs, and bridge sensors in industrial PLCs. IC Role / Device Role / Timing Role: Precision PGIA front-end that conditions microvolt-level sensor outputs before feeding 16–18-bit SAR ADCs. Use Value: Programmable gain eliminates manual range switching; 785 ns settling enables >1 MSPS throughput per channel. | Use Scenario: Portable ECG and EEG monitors requiring low-noise, dc-coupled amplification of biopotential signals. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier providing adjustable gain and high CMRR to suppress 50/60 Hz interference. Use Value: 1.8 μV/°C offset drift and 1.2 μV p-p 0.1–10 Hz noise ensure stable baseline over patient monitoring sessions. |
| Automated Test Equipment | Strain Gauge & Load Cell Interfaces |
Use Scenario: Modular ATE platforms performing parametric testing of analog ICs and passive components under varying temperature conditions. IC Role / Device Role / Timing Role: Reconfigurable gain stage adapting to different DUT output ranges while maintaining traceable metrology-grade accuracy. Use Value: Laser-trimmed gain error <0.04% and 98 dB CMRR support Class I calibration compliance per ISO/IEC 17025. | Use Scenario: Industrial weigh scales and structural health monitoring systems using millivolt-output Wheatstone bridge sensors. IC Role / Device Role / Timing Role: Bridge excitation and differential amplification stage with programmable gain to maximize ADC utilization across load ranges. Use Value: GΩ input impedance prevents loading of high-Z bridges; 10 ppm/°C gain drift ensures long-term zero stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable gain instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8253ARMZ | Higher resolution (24-bit SPI interface), lower power (2.5 mA), but reduced bandwidth (3.5 MHz at G = 1) and no transparent gain mode. | Better suited for low-power, isolated, or SPI-based embedded systems where serial control is preferred over parallel. | Select AD8253ARMZ when SPI interface, lower quiescent current, or integrated reference buffer are required - not for high-speed parallel gain switching. |
| LTC6915IMS8#PBF | Wider supply range (±1.35 V to ±18 V), higher CMRR (110 dB min at G = 100), but slower settling (1.5 µs to 0.01%) and no MSOP-10 package. | Preferred for ultra-high CMRR applications (e.g., medical isolation amps) where speed is secondary to rejection performance. | Choose LTC6915IMS8#PBF only when >100 dB CMRR at high gains is mandatory and MSOP-10 footprint is not required. |
Compared with AD8253ARMZ and LTC6915IMS8#PBF, the AD8251ARMZ uniquely balances 10 MHz bandwidth, dual gain programming modes, and MSOP-10 compactness - making it optimal for space-constrained, high-throughput DAQ designs needing deterministic parallel control.
Availability
AD8251ARMZ is available at Aetrix Electronics and suitable for data acquisition, biomedical analysis, and test and measurement applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for AD8251ARMZ 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, with deep expertise in precision instrumentation and signal chain solutions.
The AD8251ARMZ belongs to Analog Devices' iCMOS® programmable gain instrumentation amplifier product line, engineered specifically for high-speed, high-accuracy sensor signal conditioning in industrial, medical, and automated test equipment.
FAQ
What gain settings does the AD8251ARMZ support, and how are they selected?
The AD8251ARMZ supports four discrete gains: 1, 2, 4, and 8. These are selected via two digital inputs (A0 and A1) using either transparent mode (WR tied to −VS) or latched mode (WR toggled). In transparent mode, gain changes instantly with A0/A1 logic levels; in latched mode, gain updates on the falling edge of WR. The AD8251ARMZ datasheet specifies setup/hold times (tSU = 20 ns, tHD = 10 ns) to ensure reliable operation.
What is the maximum supply voltage range for the AD8251ARMZ?
The AD8251ARMZ operates from ±5 V to ±15 V dual supplies, with absolute maximum ratings of ±17 V. Exceeding ±15 V may degrade performance or reliability. The device's iCMOS® process ensures safe operation across this full range without latch-up, and its PSRR remains >80 dB up to 100 kHz - critical for noisy industrial power rails.
Does the AD8251ARMZ require external resistors for gain setting?
No, the AD8251ARMZ does not require external resistors for gain setting. All gain configurations are implemented using an internal, laser-trimmed precision resistor array fabricated on the iCMOS® process. This eliminates external component count, layout sensitivity, and matching errors - ensuring guaranteed gain error ≤0.04% at G = 2, 4, 8 and stable performance over temperature and time.
How does the AD8251ARMZ handle reference voltage inputs?
AD8251ARMZ features a dedicated REF pin with 20 kΩ input resistance and ±VS voltage range. Gain from REF to OUT is precisely 1 V/V (±0.0001), enabling precise level-shifting of the output DC offset. When used with a stable reference (e.g., AD780), the AD8251ARMZ supports true bipolar-to-unipolar conversion for single-supply ADC interfaces - a capability confirmed in the AD8251ARMZ functional block diagram and specification tables.
What is the operating temperature range for the AD8251ARMZ?
The AD8251ARMZ is specified for operation from −40°C to +85°C ambient temperature, with full parametric performance guaranteed across this range. Key parameters like offset drift (≤1.8 μV/°C at G = 8), gain drift (≤10 ppm/°C), and CMRR (≥80 dB to 50 kHz at G = 1) are tested and guaranteed over this industrial temperature range - making the AD8251ARMZ suitable for deployment in harsh environments without derating.
AD8251ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCMOS®
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 10 MHz
- Current - Input Bias:
- 5 nA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 4.1mA
- Current - Output / Channel:
- 37 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
AD8251ARMZ FAQ
1.How can I place an order for AD8251ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8251ARMZ 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 AD8251ARMZ reliable?
The price and inventory of AD8251ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8251ARMZ is usually 5 days.
3.What payment methods are accepted for AD8251ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8251ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8251ARMZ?
AD8251ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8251ARMZ 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 AD8251ARMZ?
For technical support, including AD8251ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8251ARMZ requirements.
6.How does Aetrix verify that AD8251ARMZ is sourced from the original manufacturer or authorized distributors?
All AD8251ARMZ 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 AD8251ARMZ meets industry standards.
7.What is the process for return or replacement of AD8251ARMZ?
All AD8251ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8251ARMZ, 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 AD8251ARMZ part is unused and in its original packaging.
Return procedure for AD8251ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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