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Analog Devices Inc. AD8236ARMZ-RL
- Part No.:
- AD8236ARMZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8236ARMZ-RL.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
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Product details
Overview
AD8236ARMZ-RL from Analog Devices is a micropower instrumentation amplifier optimized for low-side current sensing and battery-powered medical instrumentation. It delivers 40 μA max supply current, rail-to-rail input/output operation from 1.8 V to 5.5 V, and zero-crossover distortion across its full common-mode range. Its 110 dB CMRR at G = 100 enables high-accuracy signal extraction in noisy, single-supply environments such as portable ECG front-ends.
For engineers reviewing the AD8236ARMZ-RL datasheet, AD8236ARMZ-RL pinout, AD8236ARMZ-RL application, or AD8236ARMZ-RL equivalent, key selection criteria include ultra-low quiescent current, guaranteed rail-to-rail input voltage range down to 0 V, gain-setting flexibility via external resistor (G = 5 to 200), and industrial temperature range (−40°C to +125°C) compliance.
Technical Context
The AD8236ARMZ-RL implements a 2-op-amp instrumentation architecture with an internal rail-boosting stage that eliminates crossover distortion while maintaining <0.5 ppm nonlinearity. Its input stage uses precision laser-trimmed resistors to achieve 110 dB CMRR at G = 100 and supports true differential inputs with 1 pA bias current and 110 GΩ||6.2 pF common-mode impedance.
Gain is set externally across RG pins using a single resistor (G = 5 + 420 kΩ/RG), enabling precise scaling without trimming. The REF terminal provides direct output level-shifting capability, allowing seamless interfacing with 1.8 V–5.5 V ADCs referenced to midsupply or ground-critical for low-power biosignal acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 40 μA max - enables >1-year battery life in coin-cell–powered wearable sensors |
| CMRR | 110 dB at G = 100 - rejects interference from shared power rails in compact PCB layouts |
| Input Bias Current | 1 pA typical - preserves signal integrity when measuring across high-impedance shunts or electrodes |
| Input Voltage Range | Rail-to-rail (0 V to +VS) - supports low-side current sensing with ground-referenced shunts |
| Small-Signal Bandwidth | 23 kHz at G = 5 - sufficient for DC–20 kHz physiological signals including ECG and EMG |
| Gain Accuracy | 0.05% max at G = 5 - reduces calibration burden in production test of portable diagnostics |
| Operating Voltage | 1.8 V to 5.5 V - compatible with Li-ion, alkaline, and regulated 3.3 V/1.8 V system rails |
Pinout & Package
AD8236ARMZ-RL is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Negative differential input | True high-impedance input node; connects directly to shunt resistor low side or sensor negative |
| 2, 3 (RG) | Gain-setting terminals | Resistor placed across these pins sets gain per G = 5 + 420 kΩ/RG; open-circuit defaults to G = 5 |
| 4 (+IN) | Positive differential input | True high-impedance input node; connects directly to shunt resistor high side or sensor positive |
| 5 (−VS) | Negative supply rail | Ground reference for single-supply operation; must be connected even in 1.8 V systems |
| 6 (REF) | Output reference voltage | Defines output common-mode level; drives ADC reference or mid-supply bias with ≤210 kΩ source impedance |
| 7 (VOUT) | Differential output | Rail-to-rail output capable of driving 10 kΩ loads; swing limited by load and supply conditions |
| 8 (+VS) | Positive supply rail | Accepts 1.8 V to 5.5 V; bypass with 0.1 μF ceramic capacitor placed within 2 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover distortion | Eliminates nonlinear artifacts at input rail crossings-critical for accurate low-amplitude bio-potential measurement |
| Rail-to-rail input range | Operates with inputs from 0 V to +VS-enables direct connection to ground-referenced current-sense shunts |
| Ultra-low input bias current | 1 pA typical-minimizes voltage error across high-value source impedances (>1 MΩ) in electrode interfaces |
| Single-resistor gain programming | G = 5 to 200 set by one external resistor-reduces BOM count and layout complexity vs. multi-resistor alternatives |
| Wide supply range | 1.8 V to 5.5 V operation-supports direct integration into energy-harvesting and coin-cell–powered systems |
Applications
| Medical Instrumentation | Low-Side Current Sensing |
|---|---|
|
Use Scenario: Portable ECG monitor acquiring microvolt-level cardiac signals from dry electrodes in battery-operated wearable form factor. IC Role / Device Role / Timing Role: Front-end instrumentation amplifier conditioning differential biopotential signals before 16-bit ADC digitization. Use Value: 40 μA quiescent current extends battery life; rail-to-rail input accommodates electrode offset voltages up to +VS; 110 dB CMRR suppresses 50/60 Hz mains interference. |
Use Scenario: Real-time monitoring of battery discharge current in handheld medical devices using a 10 mΩ shunt resistor. IC Role / Device Role / Timing Role: Precision current-to-voltage converter amplifying mV-level shunt voltage with minimal offset drift. Use Value: 1 pA input bias current prevents error from shunt leakage; zero-crossover distortion preserves accuracy near 0 A crossing; G = 50 setting yields 50 mV/A scaling. |
| Portable Diagnostic Devices | Wearable Vital Sign Monitors |
|
Use Scenario: Handheld pulse oximeter requiring simultaneous red/IR photodiode signal amplification under tight power budget. IC Role / Device Role / Timing Role: Dual-channel signal conditioner (two AD8236ARMZ-RL units) extracting weak AC-coupled photocurrents. Use Value: 23 kHz bandwidth at G = 5 supports >100 Hz sampling; 1.8 V operation matches low-voltage LED drivers; MSOP footprint saves board area. |
Use Scenario: Continuous blood pressure cuff with integrated strain gauge bridge, powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Bridge output amplifier delivering ratiometric output referenced to ADC's VREF pin. Use Value: REF terminal allows direct level-shift to match ADC reference; 40 μA current enables >18-month shelf life; −40°C to +125°C rating covers clinical storage and use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8420ARMZ | Higher supply current (125 μA), wider bandwidth (1.5 MHz), no rail-to-rail input | Better suited for high-speed industrial sensor interfaces; unsuitable for 0 V–1.8 V input ranges | Select AD8420ARMZ only when bandwidth >100 kHz is required and supply headroom permits higher current draw |
| LTC6915IMS8#PBF | Lower quiescent current (25 μA), programmable gain via SPI, 8-lead MSOP package | Digital gain control adds MCU overhead; lacks guaranteed rail-to-rail input below 0.1 V | Choose LTC6915IMS8#PBF when dynamic gain adjustment is needed and system firmware can manage SPI interface |
Compared with AD8236ARMZ-RL, AD8420ARMZ trades ultra-low power for speed and AD8236ARMZ-RL's rail-to-rail input advantage, while LTC6915IMS8#PBF offers lower current but requires digital control infrastructure-making AD8236ARMZ-RL optimal for analog-only, ground-referenced, sub-100 kHz sensing.
Availability
AD8236ARMZ-RL is available at Aetrix Electronics and suitable for medical instrumentation, low-side current sensing, and portable diagnostic devices requiring stable component supply across long product lifecycles.
Supply support for AD8236ARMZ-RL 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 measurement, industrial, and healthcare markets since 1965.
The AD8236ARMZ-RL belongs to Analog Devices' micropower instrumentation amplifier product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in battery-constrained medical and portable electronic systems.
FAQ
What is the minimum supply voltage for reliable operation of the AD8236ARMZ-RL?
The AD8236ARMZ-RL operates reliably from 1.8 V to 5.5 V. At 1.8 V, it maintains rail-to-rail input (0 V to +VS), 40 μA max quiescent current, and 23 kHz small-signal bandwidth at G = 5. Performance specifications-including CMRR, offset, and noise-are fully characterized down to 1.8 V per Tables 2 and 3 of the Rev. 0 datasheet.
Can the AD8236ARMZ-RL be used for high-side current sensing?
No-the AD8236ARMZ-RL is optimized for low-side current sensing due to its rail-to-rail input range extending to 0 V but not beyond +VS. For high-side sensing, the input common-mode voltage would exceed +VS, violating absolute maximum ratings. Use dedicated high-side current sense amplifiers like the AD8210 or AD8217 instead.
How does the REF pin affect output behavior in the AD8236ARMZ-RL?
The REF pin defines the output common-mode voltage: VOUT = G × (VINP − VINM) + VREF. Driving REF with a stable 0.9 V (for 1.8 V supply) or 2.5 V (for 5 V supply) centers the output within the ADC's input range. Source impedance to REF must be ≤210 kΩ to preserve CMRR and gain accuracy, as specified in the "Reference Terminal" section of the datasheet.
What is the recommended bypassing scheme for the AD8236ARMZ-RL?
Place a 0.1 μF ceramic capacitor within 2 mm of each supply pin (+VS and −VS), and add a 10 μF tantalum capacitor on the same supply net. This dual-stage decoupling suppresses high-frequency noise and stabilizes PSRR performance. Layout guidelines emphasize short, low-inductance traces and avoiding vias between capacitors and pins.
Does the AD8236ARMZ-RL require external gain resistors for basic operation?
No-AD8236ARMZ-RL defaults to G = 5 when no resistor is placed across the RG pins (pins 2 and 3). External resistors are optional and used only to adjust gain per G = 5 + 420 kΩ/RG. Omitting the resistor simplifies design, minimizes gain error (0.05% max), and avoids temperature-induced drift from external component TC.
AD8236ARMZ-RL 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:
- Rail-to-Rail
- Slew Rate:
- 0.011V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 23 kHz
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 3.5 mV
- Current - Supply:
- 33µA
- Current - Output / Channel:
- 6 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8236ARMZ-RL FAQ
1.How can I place an order for AD8236ARMZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8236ARMZ-RL 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 AD8236ARMZ-RL reliable?
The price and inventory of AD8236ARMZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8236ARMZ-RL is usually 5 days.
3.What payment methods are accepted for AD8236ARMZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8236ARMZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8236ARMZ-RL?
AD8236ARMZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8236ARMZ-RL 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 AD8236ARMZ-RL?
For technical support, including AD8236ARMZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8236ARMZ-RL requirements.
6.How does Aetrix verify that AD8236ARMZ-RL is sourced from the original manufacturer or authorized distributors?
All AD8236ARMZ-RL 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 AD8236ARMZ-RL meets industry standards.
7.What is the process for return or replacement of AD8236ARMZ-RL?
All AD8236ARMZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with AD8236ARMZ-RL, 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 AD8236ARMZ-RL part is unused and in its original packaging.
Return procedure for AD8236ARMZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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