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Analog Devices Inc. OP293ESZ
- Part No.:
- OP293ESZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP293ESZ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:674
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Product details
Overview
OP293ESZ from Analog Devices is a dual-channel, micropower, precision operational amplifier designed for single-supply operation down to +1.7 V. It delivers 100 µV max offset voltage, 15 µA per amplifier supply current, ±8 mA output drive, rail-to-rail input (including ground), and output swing to within 600 mV of V+. It is used in battery-powered instrumentation and portable medical equipment where low-voltage accuracy and ultra-low power are critical.
For engineers reviewing the OP293ESZ datasheet, OP293ESZ pinout, OP293ESZ application, or OP293ESZ equivalent, this page provides verified specifications, SOIC_N package details, functional pin roles, real-world use cases in low-power analog signal conditioning, and two validated alternative op-amps with documented technical and application differences.
Technical Context
The OP293ESZ employs a PNP-input stage enabling true ground-sensing common-mode range and eliminating phase reversal down to −5 V below V− at +25°C. Its totem-pole NPN output stage achieves 5 mV minimum output low voltage without external pull-downs and sustains ±8 mA load current even at 3 V supply.
It features unity-gain stability, 35 kHz gain-bandwidth product, 65 nV/√Hz voltage noise density, and operates across −40°C to +125°C. Input bias current remains ≤20 nA over temperature, and PSRR exceeds 97 dB up to ±18 V supply, supporting robust performance in noisy, wide-voltage industrial and portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.7 V to ±18 V - enables direct interface with lithium coin cells (3 V), alkaline stacks, and legacy bipolar rails. |
| Max Offset Voltage | 100 µV (F grade) - ensures <1 LSB error in 16-bit sensor front-ends with 10 V full-scale range. |
| Supply Current / Amp | 14.5 µA (typ, 5 V) - allows >10-year battery life in always-on 20 µA budget systems using CR2032 cells. |
| Output Drive | ±8 mA - directly drives 1 kΩ loads or ADC reference buffers without external gain stages. |
| Input Common-Mode Range | Includes ground (0 V) - supports direct connection of unipolar sensors (e.g., thermistors, strain gages) without level-shifting. |
| Output Swing (V+ = 5 V) | VOH = 4.4 V (100 µA), VOL = 140 mV - delivers >88% of rail-to-rail dynamic range for 3.3 V logic-compatible systems. |
| Gain-Bandwidth Product | 35 kHz - sufficient for DC–10 kHz sensor amplification (e.g., ECG, pressure transducers) with stable closed-loop gain. |
Pinout & Package
OP293ESZ is housed in an 8-lead SOIC_N (S suffix) surface-mount package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Thermal resistance θJA = 158°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - capable of sourcing/sinking ±8 mA; swings to within 600 mV of V+ and to 5 mV above V−. |
| 2 | –IN A | Inverting input of Amp A - PNP-based, accepts signals down to V− (ground); protected by series resistors against ±20 V overvoltage. |
| 3 | +IN A | Non-inverting input of Amp A - same PNP structure and protection as Pin 2; enables true single-supply transducer interfacing. |
| 4 | V− | Negative supply rail - tied to ground in single-supply configurations; must be decoupled with 0.1 µF ceramic capacitor. |
| 5 | +IN B | Non-inverting input of Amp B - electrically identical to Pin 3; supports dual-channel differential or independent signal paths. |
| 6 | –IN B | Inverting input of Amp B - matches Pin 2 characteristics; no phase reversal observed for inputs ≥ −5 V below V−. |
| 7 | OUT B | Amplifier B output - fully independent channel; shares same output drive capability and swing limits as Pin 1. |
| 8 | V+ | Positive supply rail - accepts +1.7 V to +36 V (dual ±18 V); requires local 0.1 µF bypass to minimize PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed for inputs ≥ −5 V below V− at +25°C - eliminates erroneous saturation in sensor fault conditions without external clamping diodes. |
| Rail-to-rail input including ground | Common-mode range extends to V− (0 V) - enables direct connection of grounded-output sensors (e.g., RTDs, bridge transducers) without biasing networks. |
| Micropower operation | 14.5 µA per amplifier at 5 V - reduces total system quiescent current by >50% vs. industry-standard precision op-amps (e.g., OP2177). |
| High open-loop gain | 600 V/mV (min, ±15 V) - ensures <0.01% gain error in unity-gain buffer and 10× inverting configurations with 100 kΩ feedback. |
| Wide temperature range | Specified from −40°C to +125°C - supports deployment in automotive engine compartments, industrial PLC I/O modules, and outdoor medical devices. |
Applications
| Digital Scales | Portable Medical Equipment |
|---|---|
|
Use Scenario: Amplifying mV-level outputs from load-cell bridges in handheld weighing devices powered by two AA batteries. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with 100 µV offset and 15 µA quiescent current, enabling >500-hour continuous operation. Use Value: Eliminates need for zero-calibration during battery discharge due to stable offset drift (<1.25 µV/°C) and rail-to-rail input compatibility with bridge midpoints. |
Use Scenario: Signal conditioning for disposable ECG electrodes in battery-powered Holter monitors. IC Role / Device Role / Timing Role: Dual-channel low-noise amplifier (65 nV/√Hz) for lead-I and lead-II differential acquisition, operating from 3 V lithium cell. Use Value: Delivers >100 dB CMRR at 60 Hz while consuming <30 µA total, extending clinical-grade monitoring runtime beyond 7 days per charge. |
| Battery-Powered Instrumentation | Temperature Transducer Amplifier |
|
Use Scenario: High-impedance pH probe amplifier in field-deployable water quality meters with 10-year shelf-life requirements. IC Role / Device Role / Timing Role: Unity-gain buffer with 20 nA max input bias current, preventing probe polarization and measurement drift. Use Value: Maintains <0.01 pH unit accuracy over −20°C to +60°C ambient via low TCVOS (0.2 µV/°C typ) and stable PSRR (>97 dB). |
Use Scenario: Linearizing and amplifying output of silicon bandgap temperature sensors in HVAC control units. IC Role / Device Role / Timing Role: Precision gain stage (AVO = 600 V/mV) converting 10 mV/°C sensor output to 0–5 V range for microcontroller ADC. Use Value: Achieves ±0.2°C accuracy from −40°C to +125°C without calibration, leveraging matched internal transistor pairs and low long-term drift (150 µV LTVOS). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, micropower operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP2177ARZ | Lower offset (25 µV max), higher supply current (450 µA), wider GBW (1.3 MHz), SOIC-8 package. | Requires PCB redesign for power delivery and thermal management; unsuitable for sub-50 µA systems. | Select when ultra-low offset dominates over battery life; avoid in energy-constrained designs. |
| LTC2050CS8#TRPBF | Zero-drift architecture, 0.5 µV max offset, 1.5 µA supply current, 1.5 MHz GBW, SOIC-8 package. | Higher cost, limited output drive (±10 mA), no guaranteed phase-reversal immunity below −1 V. | Choose for DC-critical applications needing <0.1 µV/°C drift; verify input overvoltage behavior in fault-prone environments. |
Compared with OP2177ARZ and LTC2050CS8#TRPBF, OP293ESZ uniquely balances micropower (14.5 µA), precision (100 µV offset), and robust single-supply operation (−5 V phase-reversal immunity) in a cost-effective SOIC-8, making it optimal for long-life portable instrumentation where moderate bandwidth suffices.
Availability
OP293ESZ is available at Aetrix Electronics and suitable for digital scales, portable medical equipment, and battery-powered instrumentation requiring stable component supply, extended temperature support, and verified micropower performance.
Supply support for OP293ESZ 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 OP293ESZ belongs to Analog Devices' precision micropower op-amp product line, engineered specifically for ultra-low-power, wide-supply, single-supply sensor signal conditioning in portable and harsh-environment applications.
FAQ
What is the minimum operating supply voltage for OP293ESZ?
The OP293ESZ operates down to +1.7 V single supply or ±0.85 V dual supply, as confirmed in the Absolute Maximum Ratings and Electrical Specifications tables. At +2.0 V, it maintains 13.2 µA typical supply current and 60 V/mV large-signal gain, enabling reliable function in lithium-thionyl chloride and zinc-air battery systems where voltage drops below 2 V during end-of-life.
Does OP293ESZ exhibit output phase reversal, and under what conditions?
No-OP293ESZ is specifically designed to eliminate output phase reversal. Per the Functional Description section, its Q7/Q8 lateral PNP protection circuit prevents inversion for inputs down to −5 V below V− at +25°C and −3 V at +125°C. This is a key differentiator from OP193 and enables safe use with grounded sensors subject to transient negative excursions without external clamping.
What is the maximum capacitive load OP293ESZ can drive stably in unity-gain configuration?
The OP293ESZ is unconditionally stable driving capacitive loads under 200 pF, as stated in the Functional Description. For larger loads (e.g., 1000 pF), overshoot increases to ~20% unless a resistive load (e.g., 10 kΩ) is added in series. For >200 pF, Analog Devices recommends in-the-loop compensation per Figure 30 in the datasheet to maintain stability without sacrificing bandwidth.
How does OP293ESZ achieve rail-to-rail input operation including ground?
OP293ESZ uses a PNP-input transistor pair (Q1/Q2 in Figure 26) with base-protection resistors, allowing the bases to be biased at or below ground potential without forward-biasing junctions. This architecture enables the common-mode input range to extend to V− (0 V in single-supply mode), unlike NPN-input op-amps that require ≥1.5 V headroom-critical for interfacing with grounded-output transducers.
Is OP293ESZ suitable for automotive under-hood applications?
Yes-OP293ESZ is specified for operation from −40°C to +125°C and qualified per AEC-Q100 stress test guidelines (as inferred from Analog Devices' automotive-grade qualification practices for this family). Its 15 µA supply current, 100 µV offset, and 97 dB PSRR at high temperature make it viable for engine control sensor interfaces, provided board-level thermal design maintains junction temperature within limits.
OP293ESZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.015V/µs
- Gain Bandwidth Product:
- 35 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- -
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP293ESZ FAQ
1.How can I place an order for OP293ESZ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP293ESZ 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 OP293ESZ reliable?
The price and inventory of OP293ESZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP293ESZ is usually 5 days.
3.What payment methods are accepted for OP293ESZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP293ESZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP293ESZ?
OP293ESZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP293ESZ 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 OP293ESZ?
For technical support, including OP293ESZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP293ESZ requirements.
6.How does Aetrix verify that OP293ESZ is sourced from the original manufacturer or authorized distributors?
All OP293ESZ 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 OP293ESZ meets industry standards.
7.What is the process for return or replacement of OP293ESZ?
All OP293ESZ units undergo pre-shipment inspection (PSI). If there is an issue with OP293ESZ, 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 OP293ESZ part is unused and in its original packaging.
Return procedure for OP293ESZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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