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Analog Devices Inc. LT1637MPS8#PBF
- Part No.:
- LT1637MPS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1637MPS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,413
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Product details
Overview
LT1637MPS8#PBF from Analog Devices (formerly Linear Technology) is a micropower, rail-to-rail input/output operational amplifier with Over-The-Top® input stage enabling operation with inputs up to 44V above V– and ≥0.3V above V+. It delivers 1.1MHz gain-bandwidth, 0.4V/µs slew rate, ±25mA output drive, and shutdown current of only 3µA - ideal for high-voltage sensor conditioning and battery monitoring in harsh industrial environments.
For engineers reviewing the LT1637MPS8#PBF datasheet, LT1637MPS8#PBF pinout, LT1637MPS8#PBF application, or LT1637MPS8#PBF equivalent, this page provides verified package mapping (8-lead SO), confirmed pin functions, temperature-rated performance (–55°C to 125°C), reverse-supply protection (25V), and real-world design values for input offset voltage (≤350µV), CMRR (110dB), and capacitive load drive (4700pF with compensation).
Technical Context
The LT1637MPS8#PBF implements a dual-input-stage architecture (NPN + PNP) enabling seamless operation across –0.4V to 44V common-mode range - including inputs exceeding V+ by >0.3V. Its Over-The-Top® topology eliminates phase reversal for inputs up to 5V below VEE or 44V above VEE, independent of VCC.
Internal compensation supports stable unity-gain operation into ≥200pF; optional 0.22µF + 150Ω network extends capacitive load tolerance to 4700pF. Shutdown control reduces supply current to 3µA while maintaining high-impedance output and sub-nA input bias current even under overvoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Supply Voltage | 2.7V to 44V - supports single 3V/5V or split ±15V rails; enables direct interface with 44V industrial buses without level-shifting. |
| Gain-Bandwidth Product | 1.1MHz - sufficient for precision DC-coupled signal conditioning and low-frequency closed-loop control (e.g., 4–20mA transmitters). |
| Slew Rate | 0.4V/µs - ensures <9µs settling to 0.1% for 2V steps; adequate for sensor outputs and supply monitoring waveforms. |
| Input Offset Voltage | ≤350µV max (–40°C to 85°C) - enables accurate current sensing down to 100µV-level signals without trimming. |
| Output Drive Current | ±25mA min - drives heavy loads directly (e.g., 2kΩ transmitter loads or LED indicators) without external buffers. |
| Shutdown Current | 3µA max - reduces system standby power in battery-powered instrumentation during sleep cycles. |
| Common-Mode Range | –0.4V to 44V - allows direct measurement of high-side currents or voltages referenced to 44V rails (e.g., automotive 42V systems). |
| CMRR | 110dB - rejects noise on shared power rails in noisy industrial environments (e.g., motor drives, PLC I/O modules). |
Pinout & Package
LT1637MPS8#PBF is housed in an 8-lead plastic SO (Small Outline) package, 3.9mm × 4.9mm footprint, with standard JEDEC MS-012AC outline. Pin 1 is marked with a dot or beveled edge; device is RoHS-compliant and Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | No-connect terminal | Internally unused; must be left floating or tied to ground per layout best practice - no electrical function. |
| 2 (–IN) | Inverting input | Differential input node; accepts common-mode voltages up to 44V above V– and ≥0.3V above V+ without damage or phase reversal. |
| 3 (+IN) | Non-inverting input | Differential input node; identical Over-The-Top® voltage range as Pin 2; supports input offset nulling via external 10k pot between Pins 1 and 8. |
| 4 (V–) | Negative supply rail | Reference for internal circuitry; reverse-battery protected to 25V; substrate diode to output requires current limiting if output forced below V–. |
| 5 (SHDN) | Shutdown control input | Active-high logic: ≥1.2V above V– enables normal operation; ≤0.3V above V– places device in shutdown (3µA IQ); tolerant to +32V above V–. |
| 6 (OUT) | Amplifier output | Rail-to-rail swing (within 3mV of rails at no load); drives ≥25mA; supports 4700pF capacitive loads with external 0.22µF + 150Ω compensation network. |
| 7 (V+) | Positive supply rail | Accepts up to 44V total supply; bypass capacitor (0.01µF) required within 25mm; rise time limited to ≤1µs for supplies ≥30V to prevent oscillation. |
| 8 (NULL) | No-connect terminal | Internally unused; electrically isolated - leave unconnected or tie to V– for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Stage | Enables reliable operation with inputs ≥0.3V above V+, eliminating need for external level shifters in high-side sensing applications. |
| Rail-to-Rail Input & Output | Full dynamic range utilization across 2.7V–44V supplies - maximizes SNR in low-voltage battery systems and simplifies signal chain design. |
| Reverse Supply Protection | Draws <1nA at –25V reverse supply - prevents damage and leakage in automotive or solar panel disconnect scenarios. |
| High-Voltage Gain | 800V/mV open-loop gain at 5V supply - ensures stable closed-loop accuracy even with high feedback resistor ratios. |
| Wide Temperature Range | Specified from –55°C to +125°C (MP grade) - qualified for aerospace, downhole, and military embedded systems requiring extended thermal reliability. |
| Capacitive Load Drive | Stable into 4700pF with optional RC compensation - supports long cable runs or LCD bias networks without added isolation stages. |
Applications
| Battery Monitoring System | High-Side Current Sensing |
|---|---|
Use Scenario: Real-time monitoring of 12V–48V lead-acid or Li-ion battery packs in UPS and telecom backup systems. IC Role / Device Role / Timing Role: Precision differential amplifier measuring cell voltage or pack voltage with inputs referenced to high-side rail. Use Value: Over-The-Top® input allows direct connection to battery positive terminal without level-shifting; 350µV VOS enables <0.1% voltage accuracy over full temperature range. | Use Scenario: Measuring motor phase current in industrial inverters where shunt is placed between power stage and load. IC Role / Device Role / Timing Role: High-common-mode differential amplifier converting shunt voltage to ground-referenced output. Use Value: 44V input range accommodates 42V bus + transient spikes; ±25mA output drives 2kΩ transmitter load directly; 110dB CMRR rejects PWM noise. |
| 4–20mA Transmitter | Lamp/Open-Circuit Detector |
Use Scenario: Two-wire loop-powered sensor transmitter for pressure, temperature, or flow in process automation. IC Role / Device Role / Timing Role: Voltage-to-current converter with rail-to-rail output driving 25mA into 1kΩ loop impedance. Use Value: 0.4V/µs slew rate ensures fast response to step changes; shutdown mode reduces quiescent current to 3µA during calibration or fault states. | Use Scenario: Detecting filament breakage in high-voltage incandescent lighting systems (e.g., streetlights, aircraft landing lights). IC Role / Device Role / Timing Role: Over-The-Top® comparator with hysteresis comparing lamp voltage to reference. Use Value: Inputs tolerate 44V common-mode while sensing open-circuit condition; no phase reversal ensures reliable state detection during transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1490AMPS8#PBF | Lower GBW (175kHz), higher VOS (1.5mV), same MP temp grade and Over-The-Top® input. | Optimized for ultra-low power (15µA IQ) rather than speed; unsuitable for >10kHz closed-loop bandwidths. | Select when power budget is <20µA and bandwidth <200kHz; not drop-in for LT1637MPS8#PBF's 1.1MHz requirement. |
| ADA4091-2ARZ | Higher GBW (1.2MHz), lower VOS (120µV), but only rated to 85°C and lacks Over-The-Top® input (max VCM = V+ – 1.2V). | Requires external level-shifting for high-side sensing; limited to commercial/industrial ambient temperatures. | Select for improved precision and speed in non-extreme environments; avoid where inputs exceed V+ or operating temperature exceeds 85°C. |
Compared with LT1490AMPS8#PBF and ADA4091-2ARZ, the LT1637MPS8#PBF uniquely combines 1.1MHz bandwidth, Over-The-Top® input capability, and –55°C to 125°C operation - making it the only choice for high-voltage, high-reliability, wide-temperature analog front-ends.
Availability
LT1637MPS8#PBF is available at Aetrix Electronics and suitable for battery monitoring, high-side current sensing, 4–20mA transmitter design, and lamp outage detection requiring stable component supply across extended temperature and voltage ranges.
Supply support for LT1637MPS8#PBF 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1637 product line was developed by Linear Technology (acquired by ADI in 2017) to address high-voltage, micropower precision amplification needs in harsh environments - specifically targeting applications where inputs exceed supply rails or operate across extreme temperatures.
FAQ
What is the maximum common-mode input voltage for LT1637MPS8#PBF?
The LT1637MPS8#PBF supports a common-mode input range from –0.4V to 44V relative to V–. This includes operation with inputs up to 44V above V– and ≥0.3V above V+, enabled by its Over-The-Top® input architecture - a key differentiator versus standard rail-to-rail op amps.
Does LT1637MPS8#PBF require external compensation for capacitive loads?
LT1637MPS8#PBF is internally compensated for stable operation into ≥200pF. For capacitive loads >200pF (e.g., long cables or LCD bias networks), an external 0.22µF capacitor in series with a 150Ω resistor from OUT to GND is required - enabling stable operation into up to 4700pF as confirmed in the LT1637MPS8#PBF datasheet Figure 16.
What is the guaranteed operating temperature range for LT1637MPS8#PBF?
The LT1637MPS8#PBF is an MP-grade device with a guaranteed operating temperature range of –55°C to +125°C. This is explicitly defined in the Absolute Maximum Ratings table and Electrical Characteristics sections of the official LT1637 datasheet, distinguishing it from C/I/H-grade variants.
How does the shutdown feature affect output impedance and leakage in LT1637MPS8#PBF?
When LT1637MPS8#PBF is in shutdown (SHDN ≤0.3V above V–), the output enters high-impedance state with leakage current ≤1µA. Input bias current drops to <0.1nA, and supply current falls to ≤3µA - preserving signal integrity in multiplexed or shared-bus configurations without loading downstream circuitry.
Can LT1637MPS8#PBF be used in single-supply 3V applications with rail-to-rail output swing?
Yes - LT1637MPS8#PBF is fully specified for 3V single-supply operation. Its rail-to-rail output swings to within 3mV of both rails at no load, and maintains ≥25mA drive capability. Input common-mode range extends to –0.4V, enabling true ground-sensing capability without level-shifting circuitry.
LT1637MPS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Over-The-Top®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 17 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 230µA
- Current - Output / Channel:
- 31.7 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1637MPS8#PBF FAQ
1.How can I place an order for LT1637MPS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1637MPS8#PBF 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 LT1637MPS8#PBF reliable?
The price and inventory of LT1637MPS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1637MPS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1637MPS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1637MPS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1637MPS8#PBF?
LT1637MPS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1637MPS8#PBF 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 LT1637MPS8#PBF?
For technical support, including LT1637MPS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1637MPS8#PBF requirements.
6.How does Aetrix verify that LT1637MPS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1637MPS8#PBF 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 LT1637MPS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1637MPS8#PBF?
All LT1637MPS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1637MPS8#PBF, 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 LT1637MPS8#PBF part is unused and in its original packaging.
Return procedure for LT1637MPS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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