OP2177ARMZ
The OP2177ARMZ is Analog Devices' benchmark precision dual operational amplifier, delivering 15uV typical offset voltage with an ultra-low 0.2uV/C drift — performance that eliminates external trimming in virtually all DC-precision applications. Each channel combines 1.3MHz gain-bandwidth, 8nV/rtHz voltage noise, 500pA input bias current, and only 0.5mA supply current across a wide 5V to 30V supply range. The dual-channel MSOP-8 package (3x3mm) provides two precision amplifiers in the footprint of a single SOIC-8. Outputs are stable with capacitive loads exceeding 1000pF with no external compensation. From bridge/load-cell signal conditioning to thermocouple amplifiers and medical instrumentation, the OP2177 is the gold standard for precision dual op-amp designs.
Product Specifications
OP2177ARMZ - ADI Dual Precision Op-Amp, 15uV Offset, 0.2uV/C Drift, MSOP-8
Analog Devices Inc. - 2 Channels, 1.3MHz GBW, 8nV/rtHz Noise, 500pA Bias, 5V-30V Supply, -40 to +125C
MFR Part #: OP2177ARMZSuperb SKU: SUP-OP2177ARMZ
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The OP2177ARMZ is Analog Devices' benchmark precision dual operational amplifier, delivering 15uV typical offset voltage with an ultra-low 0.2uV/C drift — performance that eliminates external trimming in virtually all DC-precision applications. Each channel combines 1.3MHz gain-bandwidth, 8nV/rtHz voltage noise, 500pA input bias current, and only 0.5mA supply current across a wide 5V to 30V supply range. The dual-channel MSOP-8 package (3x3mm) provides two precision amplifiers in the footprint of a single SOIC-8. Outputs are stable with capacitive loads exceeding 1000pF with no external compensation. From bridge/load-cell signal conditioning to thermocouple amplifiers and medical instrumentation, the OP2177 is the gold standard for precision dual op-amp designs.
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Key Performance Highlights
Offset Voltage (Typ)
15 uV
Offset Drift
0.2 uV/C (typical)
Input Bias Current
0.5 nA (typical)
Noise / GBW
8 nV/rtHz / 1.3 MHz
Supply Range
5V to 30V, +/-2.5V to +/-15V
Package
MSOP-8 (3 x 3 mm)
Technical Specifications
| Manufacturer | Analog Devices Inc. |
| Part Number | OP2177ARMZ |
| Amplifier Type | Precision Operational Amplifier |
| Number of Channels | 2 (Dual) |
| Input Offset Voltage (Typ / Max) | 15 uV / 100 uV |
| Offset Voltage Drift | 0.2 uV/C (typical) |
| Input Bias Current (Typ / Max) | 0.5 nA / 2 nA |
| Gain Bandwidth Product (GBW) | 1.3 MHz |
| Slew Rate | 0.7 V/us |
| Voltage Noise (1 kHz) | 8 nV/rtHz |
| Current Noise (1 kHz) | 0.2 pA/rtHz |
| CMRR (DC, Min) | 125 dB |
| PSRR (DC, Min) | 120 dB |
| Open-Loop Gain (AVOL) | 120 dB (min) |
| Supply Voltage Range | 5 V to 30 V, or +/-2.5 V to +/-15 V |
| Supply Current | 0.5 mA per channel (1.0 mA total) |
| Output Swing | Rail-to-rail (within ~300mV of each rail) |
| Capacitive Load Stability | Stable with >1000 pF (no external compensation) |
| Operating Temperature | -40C to +125C |
| Package | MSOP-8 (3.0 mm x 3.0 mm, 0.65 mm pitch) |
| RoHS | RoHS Compliant |
Product Details
Precision DC Performance — No Trimming Required
The OP2177 achieves 15uV typical offset voltage through Analog Devices' advanced laser-trimming and DigiTrim technology at wafer level. Combined with 0.2uV/C drift, the amplifier maintains DC accuracy across the full -40C to +125C temperature range without external offset nulling circuits.
Ultra-Low Bias Current: 0.5nA typical input bias current minimizes voltage errors across high-impedance sources (thermocouples, pH probes, photodiodes). Unlike JFET-input precision op-amps, the OP2177 uses a bipolar input stage with bias current cancellation, achieving nanoamp-level bias while maintaining the superior voltage noise and offset drift of bipolar technology.
Wide Supply + Stability: 5V to 30V operation with capacitive load drive >1000pF eliminates the need for external isolation resistors. The dual channel in MSOP-8 saves 50% PCB area versus two single op-amps.
Key Applications
Bridge / Load Cell Amplifiers - Precision differential gain, low drift over temperature
Thermocouple / RTD Signal Conditioning - Cold-junction compensation, low bias current
Precision Current Sensing - High CMRR high-side/low-side shunt amplifiers
Strain Gauge Amplifiers - Instrumentation amplifier front-end, gain stage
Medical Instrumentation - ECG/EEG front-ends, patient monitoring, pulse oximetry
Data Acquisition Front-End - ADC driver/buffer with anti-aliasing filter
Precision Active Filters - Low-frequency, low-offset Sallen-Key / multiple-feedback topologies
OPx177 Precision Op-Amp Family
| Part Number | Channels | Package Options | Key Use |
|---|---|---|---|
| OP1177ARZ | 1 (Single) | SOIC-8, MSOP-8 | Single-channel precision |
| OP2177ARMZ | 2 (Dual) | MSOP-8, SOIC-8 | Dual precision, diff amp |
| OP4177ARUZ | 4 (Quad) | TSSOP-14, SOIC-14 | Multi-channel front-end |
All three share identical electrical specifications. Choose based on required channel count and package footprint.
Why Source OP2177ARMZ from Superb Automation?
Analog Front-End BOM - Op-amps + precision resistors + ADC + reference + passives - one PO
Low-Noise PCB Design - Guard rings, Kelvin sensing, thermal gradient management for precision analog
SMT Assembly - MSOP-8 reflow with proper stencil design for fine-pitch leads
Testing Capability - Offset voltage and CMRR verification for critical analog signal chains
25 Years Trusted - Electronic components + PCBA partner since 2000
Genuine Parts - Direct from trusted ADI channels, full lot traceability
Frequently Asked Questions
What is the OP2177ARMZ used for?
The OP2177ARMZ is a precision dual op-amp for bridge/load cell signal conditioning, thermocouple amplifiers, strain gauge instrumentation, precision current sensing, medical sensor front-ends, and data acquisition. Its 15uV offset eliminates external trimming in virtually all DC-precision circuits.
How does the offset drift affect my circuit?
With 0.2uV/C drift, a 100C temperature change adds only 20uV of additional offset — comparable to the initial 15uV offset. This means total offset over the full -40 to +125C range stays within approximately 50uV typical, making the OP2177 suitable for 12-16 bit precision systems without auto-zero or chopper stabilization.
Can this op-amp run from a single 5V supply?
Yes. The OP2177 operates from +5V to +30V single supply. The input common-mode range includes ground (0V), and the output swings within ~300mV of ground and ~300mV of the positive rail. For true rail-to-rail operation down to 0V, use a rail-to-rail output op-amp such as AD8628.
How does OP2177 compare to OPA2277 or LT1013?
OP2177 is ADI's part; OPA2277 (TI) and LT1013 (ADI) are competing precision dual op-amps. OP2177/OPA2277: 15-25uV offset, similar specs. LT1013: ~150uV offset, lower precision. The OP2177 and OPA2277 are functionally equivalent and often used interchangeably in precision designs. Check your specific circuit requirements for offset, noise, and supply range.
What is the difference between ARMZ and ARZ packages?
ARMZ = MSOP-8 (Mini Small Outline Package, 3x3mm). ARZ = SOIC-8 (Small Outline IC, 5x6mm). Same silicon, different package. Choose ARMZ for space-constrained designs; choose ARZ for easier hand-soldering and prototyping. Both are RoHS-compliant and electrically identical.
