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Texas Instruments LMP7732MA/NOPB
- Part No.:
- LMP7732MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP7732MA/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,720
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Product details
Overview
LMP7732MA/NOPB from Texas Instruments is a dual, rail-to-rail input/output, low-noise operational amplifier optimized for precision sensor signal conditioning in low-voltage systems. It delivers 2.9 nV/√Hz input voltage noise at 1 kHz, 22 MHz gain bandwidth, and ±1.5 nA input bias current across 1.8 V to 5.5 V supply, enabling high-fidelity photometric and medical instrumentation.
For engineers reviewing the LMP7732MA/NOPB datasheet, LMP7732MA/NOPB pinout, LMP7732MA/NOPB application, or LMP7732MA/NOPB equivalent, key selection criteria include its ultra-low 1/f noise corner (3 Hz), rail-to-rail output swing within 13 mV of rails (at 2 kΩ load), CMRR of 130 dB, THD of 0.001% at 10 kHz, and guaranteed operation from −40°C to +125°C.
Technical Context
The LMP7732MA/NOPB employs bipolar input stages with proprietary input bias current cancellation, achieving ±1.5 nA bias while retaining low voltage noise-uncommon in bipolar-input op-amps. Its 22 MHz GBW and 130 dB open-loop gain support stable high-gain configurations up to 1000× without sacrificing bandwidth or DC accuracy.
It features rail-to-rail input common-mode range (0 V to VS) and rail-to-rail output swing (within 13–24 mV of either rail depending on load and temperature), with PSRR and CMRR both exceeding 101 dB across 1.8–5.5 V supplies and full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.9 nV/√Hz @ 1 kHz - enables sub-μV-level signal resolution in photodiode and strain gauge front-ends |
| Gain Bandwidth | 22 MHz - supports closed-loop gains ≥100 with >200 kHz usable bandwidth |
| Supply Voltage Range | 1.8 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V logic, and legacy 5 V systems |
| Input Bias Current | ±1.5 nA - minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes) |
| CMRR | 130 dB (typ) - rejects >99.9997% of common-mode interference in noisy industrial environments |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, portable medical, and industrial control applications |
| THD+N | 0.001% @ 10 kHz - preserves spectral purity in audio-grade and high-fidelity data acquisition paths |
Pinout & Package
Package: 8-Pin SOIC (Small Outline Integrated Circuit), body size 4.9 mm × 3.9 mm, standard JEDEC MS-012AC, RoHS-compliant, lead-free (NOPB suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT B) | Amplifier B output | Delivers rail-to-rail buffered signal; drives loads down to 2 kΩ with <24 mV headroom |
| 2 (−IN B) | Inverting input B | Differential node for feedback network; accepts common-mode voltages from 0 V to VS |
| 3 (+IN B) | Non-inverting input B | High-impedance sensor interface point; bias current ≤1.5 nA minimizes leakage error |
| 4 (V−) | Negative supply | Ground reference for single-supply operation; supports true 0 V input capability |
| 5 (V+) | Positive supply | Accepts 1.8–5.5 V; internal regulation ensures PSRR >101 dB across full range |
| 6 (−IN A) | Inverting input A | Independent channel input; electrically isolated from Channel B per datasheet isolation specs |
| 7 (+IN A) | Non-inverting input A | Matches Pin 3 performance; enables dual-channel synchronous sensing (e.g., differential bridge) |
| 8 (OUT A) | Amplifier A output | Identical output drive to Pin 1; allows independent gain/phase tuning per channel |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input & output | Enables full dynamic range utilization in single-supply 1.8 V systems-no level-shifting circuitry required |
| 2.9 nV/√Hz @ 1 kHz, 3 Hz 1/f corner | Reduces integrated noise in 0.1–10 Hz band to 75 nVPP, critical for DC-coupled sensor amplification |
| Proprietary bias current cancellation | Maintains ±1.5 nA input bias despite bipolar input stage-ideal for high-Z electrochemical sensors |
| 130 dB CMRR & PSRR | Preserves signal integrity in mixed-signal PCBs with shared power/ground and switching regulators |
| 22 MHz GBW with 130 dB open-loop gain | Supports precision gain-of-1000 configurations with <0.01% gain error and >100 kHz closed-loop bandwidth |
Applications
| Gas Analysis Instruments | Photometric Instrumentation |
|---|---|
Use Scenario: Amplifying weak current signals from NDIR (non-dispersive infrared) detector diodes in portable gas analyzers. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier with matched channels for reference/active path differential measurement. Use Value: 2.9 nV/√Hz noise and 1.5 nA bias current minimize dark-current-induced offset drift and enable sub-ppm gas concentration resolution. | Use Scenario: Conditioning analog outputs from photodiode arrays in clinical blood analyzers and spectrophotometers. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail I/V converter and buffer driving 16-bit SAR ADC inputs. Use Value: 0.001% THD at 10 kHz and 22 MHz GBW preserve optical signal fidelity across full 380–780 nm spectral range. |
| Medical Instrumentation | Portable Battery-Powered Sensors |
Use Scenario: Front-end amplification of ECG electrode signals in handheld patient monitors. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier driver with independent gain and filtering per limb lead. Use Value: −40°C to +125°C rating and 130 dB CMRR reject 50/60 Hz mains interference without external notch filters. | Use Scenario: Signal conditioning for MEMS accelerometers and humidity sensors in wearable health trackers. IC Role / Device Role / Timing Role: Low-power, precision gain stage operating from coin-cell or single Li-ion battery (1.8–3.6 V). Use Value: 4.4 mA supply current at 2.5 V and rail-to-rail I/O maximize battery life while preserving SNR in constrained 3.3 mm × 3.3 mm layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture; 5.2 nV/√Hz noise; 12 MHz GBW; higher cost; no 1/f corner | Better DC accuracy over temperature; less suitable for wideband AC-coupled photometry | Select for μV-level offset stability over time/temp; avoid when 22 MHz bandwidth or lowest 1/f noise is required |
| ADA4898-2ARMZ | 4.5 nV/√Hz noise; 290 MHz GBW; ±3.5 mA supply; requires ≥±2.5 V dual supply or 5 V single | Higher speed for video/communication; excessive bandwidth and power for sensor front-ends | Select only when >100 MHz small-signal response is needed; not drop-in due to supply and quiescent current mismatch |
Compared with OPA2189IDR and ADA4898-2ARMZ, the LMP7732MA/NOPB uniquely balances ultra-low 1/f noise (3 Hz corner), 22 MHz bandwidth, and 1.8 V operation-making it optimal for battery-powered precision analog front-ends where noise, power, and supply flexibility are co-constrained.
Availability
LMP7732MA/NOPB is available at Aetrix Electronics and suitable for gas analysis instruments, photometric instrumentation, medical instrumentation, portable battery-powered sensors, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMP7732MA/NOPB 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of investment in precision amplifier design and manufacturing.
The LMP™ amplifier family-including the LMP7732MA/NOPB-is engineered specifically for high-accuracy, low-noise signal conditioning in sensor interfaces, medical devices, and portable instrumentation where DC precision and wideband fidelity must coexist.
FAQ
What is the maximum supply voltage for the LMP7732MA/NOPB?
The absolute maximum supply voltage for the LMP7732MA/NOPB is 6.0 V (V+ − V−), but the recommended operating range is 1.8 V to 5.5 V. Operation beyond 5.5 V risks permanent damage and invalidates all electrical specifications; TI specifies 5.5 V as the upper limit for functional, guaranteed performance across temperature.
Does the LMP7732MA/NOPB support true rail-to-rail input at 1.8 V supply?
Yes-the LMP7732MA/NOPB guarantees rail-to-rail input common-mode range (0 V to VS) down to 1.8 V supply, verified per Electrical Characteristics tables at VS = 2.5 V and confirmed in Application Notes. At 1.8 V, CMVR remains 0 V to 1.8 V with CMRR ≥80 dB, enabling direct interfacing with 0 V-referenced sensors.
What is the 1/f noise corner frequency of the LMP7732MA/NOPB?
The LMP7732MA/NOPB has a 1/f noise corner at 3 Hz (typical), as explicitly stated in the FEATURES section of the datasheet: "Input Voltage Noise – f = 3 Hz 3.3 nV/√Hz". This low corner enables minimal integrated noise in DC-coupled applications such as precision weigh scales and thermopile amplifiers.
Can the LMP7732MA/NOPB drive a 10 kΩ load with rail-to-rail output swing?
Yes-per the 2.5 V Electrical Characteristics table, the LMP7732MA/NOPB delivers output voltage swing within 5 mV of each rail (high and low) when loaded with 10 kΩ to V+/2. At 5 V supply, this yields >4.99 VOUT and <10 mVOUT, meeting true rail-to-rail specification for high-impedance ADC drivers and comparator interfaces.
Is the LMP7732MA/NOPB pin-compatible with the single-channel LMP7731?
No-the LMP7732MA/NOPB is an 8-pin dual op-amp in SOIC/VSSOP, while the LMP7731 is offered in 5-pin SOT-23 and 8-pin SOIC packages. The 5-pin SOT-23 version lacks dedicated power pins for dual operation and is not pin-compatible; only the 8-pin SOIC variant shares footprint but differs in channel count and pin mapping (e.g., LMP7731 SOIC uses Pins 1–5 for IN+, IN−, OUT, V+, V−).
LMP7732MA/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2.4V/µs
- Gain Bandwidth Product:
- 22 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 14 nA
- Voltage - Input Offset:
- 6 µV
- Current - Supply:
- 5mA (x2 Channels)
- Current - Output / Channel:
- 49 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-SOIC
LMP7732MA/NOPB FAQ
1.How can I place an order for LMP7732MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP7732MA/NOPB 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 LMP7732MA/NOPB reliable?
The price and inventory of LMP7732MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP7732MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMP7732MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP7732MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP7732MA/NOPB?
LMP7732MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP7732MA/NOPB 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 LMP7732MA/NOPB?
For technical support, including LMP7732MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP7732MA/NOPB requirements.
6.How does Aetrix verify that LMP7732MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP7732MA/NOPB 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 LMP7732MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMP7732MA/NOPB?
All LMP7732MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP7732MA/NOPB, 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 LMP7732MA/NOPB part is unused and in its original packaging.
Return procedure for LMP7732MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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