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Texas Instruments LMP7732MMX/NOPB
- Part No.:
- LMP7732MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP7732MMX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,311
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Product details
Overview
LMP7732MMX/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 LMP7732MMX/NOPB datasheet, LMP7732MMX/NOPB pinout, LMP7732MMX/NOPB application, or LMP7732MMX/NOPB equivalent, key selection criteria include its 3 Hz 1/f noise corner, 130 dB CMRR, rail-to-rail output swing within 13 mV of rails (at 2 kΩ), −40°C to +125°C operating range, and VSSOP-8 package compatibility with space-constrained portable designs.
Technical Context
The LMP7732MMX/NOPB employs bipolar input stages with proprietary input bias current cancellation, achieving ±1.5 nA bias while retaining low voltage noise-unlike conventional JFET or CMOS op-amps. Its 130 dB open-loop gain and 22 MHz GBW support stable high-gain closed-loop configurations up to 1000× without sacrificing bandwidth.
It features true rail-to-rail input (CMVR = 0 V to VS) and output (swing to within 13 mV of either rail at 2 kΩ), enabled by parallel p-channel and n-channel input pairs. PSRR exceeds 101 dB and CMRR remains ≥105 dB across 1.5 V ≤ VCM ≤ VS−0.5 V, ensuring robust performance in noisy, battery-powered environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.9 nV/√Hz @ 1 kHz - enables sub-μV-level resolution in DC-coupled sensor front-ends |
| Gain Bandwidth Product | 22 MHz - supports ≥10× closed-loop gain with >2 MHz usable bandwidth |
| Input Bias Current | ±1.5 nA max - minimizes IR drop errors in high-impedance pH, photodiode, or thermopile interfaces |
| CMRR | 130 dB typical - rejects common-mode interference in single-supply bridge or transducer circuits |
| Supply Voltage Range | 1.8 V to 5.5 V - operates directly from Li-ion, 3.3 V, or 5 V rails without regulation overhead |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin, industrial sensor node, and medical device use |
| Output Swing | Within 13 mV of rails (RL = 2 kΩ) - maximizes dynamic range in low-voltage ADC driver applications |
Pinout & Package
Package: 8-pin VSSOP (DGK), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT B) | Amplifier B output | Delivers rail-to-rail buffered signal; drives ADC inputs or low-impedance loads up to ±45 mA |
| 2 (–IN B) | Inverting input B | Differential sensing node; accepts anti-parallel diode-protected inputs up to ±2 V differential |
| 3 (+IN B) | Non-inverting input B | High-impedance reference or sensor connection point; biased via internal cancellation circuitry |
| 4 (V–) | Negative supply | Ground or negative rail; must be decoupled locally with 0.1 μF ceramic capacitor |
| 5 (V+) | Positive supply | 1.8–5.5 V source; PSRR >101 dB ensures immunity to supply ripple in mixed-signal PCBs |
| 6 (–IN A) | Inverting input A | Independent channel input; shares same bias cancellation architecture as Pin 2 |
| 7 (+IN A) | Non-inverting input A | Second precision input node; supports independent sensor channel or feedback path |
| 8 (OUT A) | Amplifier A output | Full rail-to-rail output stage; complements OUT B for dual-channel signal chains |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | CMVR spans 0 V to VS; output swings to within 13 mV of either rail at 2 kΩ load - preserves full ADC input range |
| 2.9 nV/√Hz voltage noise @ 1 kHz | Lowest noise in TI's 5 V RRIO portfolio - critical for amplifying weak signals from photodiodes or strain gauges |
| Proprietary input bias cancellation | Enables ±1.5 nA bias with bipolar input stage - combines low noise and low offset drift for DC accuracy |
| 130 dB CMRR & PSRR | Maintains signal integrity in single-supply systems with shared ground paths or switching regulators |
| 22 MHz GBW with 2.4 V/μs slew rate | Supports fast settling in multiplexed sensor arrays and active filter stages without phase margin loss |
Applications
| Photometric Instrumentation | Gas Analysis Sensors |
|---|---|
Use Scenario: Amplifying low-level current from photodiode-based optical absorption sensors in handheld gas analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input noise and bias current to preserve SNR in picoampere-range photocurrents. Use Value: 2.9 nV/√Hz noise and ±1.5 nA bias enable detection of <100 ppm gas concentration shifts with <0.1% linearity error. |
Use Scenario: Conditioning output from electrochemical CO or NOx sensors in automotive exhaust monitoring modules. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier driving 16-bit SAR ADCs with rail-to-rail swing to maximize ENOB. Use Value: 130 dB CMRR rejects common-mode noise from 12 V vehicle power; −40°C to +125°C rating ensures operation under hood conditions. |
| Medical Patient Monitoring | Portable Diagnostic Equipment |
Use Scenario: Front-end amplification for ECG electrode signals in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier stage providing matched gain, offset, and noise performance. Use Value: Dual topology reduces component count; 1.8 V min supply extends battery life in coin-cell or LiPo-powered devices. |
Use Scenario: Signal conditioning for handheld blood glucose or pulse oximetry meters with optical and analog front ends. IC Role / Device Role / Timing Role: Low-noise, low-power op-amp driving ADCs and driving LCD bias supplies via rail-to-rail output. Use Value: VSSOP-8 footprint saves >40% board area vs SOIC-8; 4.4 mA supply current enables >100-hour runtime on AAA batteries. |
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 |
|---|---|---|---|
| OPA2189IDGKT | Lower 1/f corner (0.1 Hz), higher 5.6 nV/√Hz noise at 1 kHz, 10 MHz GBW, ±20 pA bias | Better for ultra-low-frequency DC stability; less suitable for wideband sensor AC coupling | Select when sub-μV/°C TCVOS dominates over broadband noise; avoid if >10 MHz signal content exists |
| ADA4898-2ARMZ | Higher 3.9 nV/√Hz noise, 290 MHz GBW, ±1.2 μA bias, ±15 V supply capable | Targeted at high-speed data acquisition, not low-voltage portable systems | Choose only for 10+ V systems requiring >100 MHz bandwidth; incompatible with 1.8–5.5 V battery rails |
Compared with OPA2189IDGKT and ADA4898-2ARMZ, the LMP7732MMX/NOPB uniquely balances ultra-low 1/f noise (3 Hz corner), sub-2 nV/√Hz broadband noise, rail-to-rail operation down to 1.8 V, and dual-channel integration-making it optimal for portable, battery-powered precision analog front ends where voltage headroom and noise floor are co-constrained.
Availability
LMP7732MMX/NOPB is available at Aetrix Electronics and suitable for photometric instrumentation, gas analysis sensors, and portable diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMP7732MMX/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 expertise in precision amplifiers and signal chain solutions.
The LMP7732MMX/NOPB belongs to TI's LMP™ precision op-amp family, engineered specifically for low-noise, low-voltage, rail-to-rail signal conditioning in battery-powered and space-constrained measurement systems.
FAQ
What is the input voltage noise specification of the LMP7732MMX/NOPB at 1 kHz?
The LMP7732MMX/NOPB has a typical input voltage noise density of 2.9 nV/√Hz at 1 kHz, measured under standard conditions (VS = 5 V, VCM = 2.5 V). This value is confirmed across 2.5 V, 3.3 V, and 5 V supply voltages and remains stable over the full −40°C to +125°C operating temperature range. The LMP7732MMX/NOPB achieves this performance using bipolar input stages with proprietary bias cancellation.
Does the LMP7732MMX/NOPB support true rail-to-rail input and output operation?
Yes, the LMP7732MMX/NOPB provides true rail-to-rail input (CMVR = 0 V to VS) and output (swing to within 13 mV of either rail at 2 kΩ load). This is achieved via parallel p-channel and n-channel input transistor pairs and a complementary output stage. The LMP7732MMX/NOPB maintains ≥80 dB large-signal CMRR across the full input range, ensuring accuracy even near supply rails.
What is the maximum supply voltage and operating temperature range for the LMP7732MMX/NOPB?
The LMP7732MMX/NOPB has an absolute maximum supply voltage of 6.0 V and a recommended operating supply range of 1.8 V to 5.5 V. Its guaranteed operating temperature range is −40°C to +125°C, validated per JEDEC JESD22-A108. Thermal resistance θJA is 235°C/W in the VSSOP-8 package, supporting reliable operation in sealed enclosures or under-hood automotive environments.
How does the input bias current cancellation work in the LMP7732MMX/NOPB?
The LMP7732MMX/NOPB uses proprietary circuitry that actively cancels input bias current in its bipolar input stage, reducing net bias to ±1.5 nA max while preserving low voltage noise. This is implemented via auxiliary current sources that mirror and oppose base current flow in the input transistors. The LMP7732MMX/NOPB maintains this performance across VCM = 0.5 V to VS−0.5 V and all supply voltages.
Is the LMP7732MMX/NOPB pin-compatible with other dual op-amps in VSSOP-8 packages?
No direct pin-compatible replacements are documented for the LMP7732MMX/NOPB in VSSOP-8. Its pinout (OUT B, –IN B, +IN B, V–, V+, –IN A, +IN A, OUT A) is standardized for dual op-amps but functional differences-such as bias cancellation architecture, noise profile, and rail-to-rail behavior-require validation before substitution. The LMP7732MMX/NOPB must be evaluated independently in layout and schematic design.
LMP7732MMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-VSSOP
LMP7732MMX/NOPB FAQ
1.How can I place an order for LMP7732MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP7732MMX/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 LMP7732MMX/NOPB reliable?
The price and inventory of LMP7732MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP7732MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP7732MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP7732MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP7732MMX/NOPB?
LMP7732MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP7732MMX/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 LMP7732MMX/NOPB?
For technical support, including LMP7732MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP7732MMX/NOPB requirements.
6.How does Aetrix verify that LMP7732MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP7732MMX/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 LMP7732MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP7732MMX/NOPB?
All LMP7732MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP7732MMX/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 LMP7732MMX/NOPB part is unused and in its original packaging.
Return procedure for LMP7732MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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