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Texas Instruments LMP7718MMX/NOPB
- Part No.:
- LMP7718MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMP7718MMX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,421
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Product details
Overview
LMP7718MMX/NOPB from Texas Instruments is a dual-channel, decompensated, precision CMOS-input operational amplifier optimized for high-speed, low-noise signal conditioning in 1.8V–5.5V systems. It delivers 88 MHz gain bandwidth at G = +10, 5.8 nV/√Hz input voltage noise, ±150 µV max input offset voltage, and rail-to-rail output swing within 25 mV of either rail (10 kΩ load), enabling high-fidelity ADC interface and photodiode amplification.
For engineers reviewing the LMP7718MMX/NOPB datasheet, LMP7718MMX/NOPB pinout, LMP7718MMX/NOPB application, or LMP7718MMX/NOPB equivalent, key selection considerations include its minimum stable gain of +10, 100 fA input bias current, −40°C to +125°C operation, VSSOP-8 packaging, and requirement for external lead-lag compensation when used below G = +10.
Technical Context
The LMP7718MMX/NOPB employs TI's VIP50 CMOS process to achieve ultra-low input bias current (100 fA) and low input voltage noise (5.8 nV/√Hz), while maintaining 88 MHz GBW at G = +10. Its decompensated architecture places the dominant pole at 1.6 kHz and second pole at 45 MHz, requiring closed-loop gain ≥10 or external RC compensation for stability.
It features rail-to-rail output with 45 mV swing from rails into 2 kΩ, common-mode input range extending to V−, and guaranteed performance at both 2.5V and 5.0V supplies. The device is not unity-gain stable and must not be used open-loop due to internal positive feedback enhancing output drive capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 88 MHz at G = +10 - enables wideband active filtering and fast settling in data acquisition front-ends. |
| Input Voltage Noise Density | 5.8 nV/√Hz @ 1 kHz - preserves SNR in low-level sensor and photodiode transimpedance applications. |
| Input Bias Current | 100 fA max @ TA ≤ 125°C - minimizes DC error and leakage-induced drift in high-impedance source interfaces. |
| Input Offset Voltage | ±150 µV max - ensures <0.015% gain error in precision instrumentation amplifiers and reference buffers. |
| Rail-to-Rail Output Swing | 25 mV from rail @ 10 kΩ - maximizes dynamic range in 1.8V–3.3V single-supply systems like portable medical sensors. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct battery operation (Li-ion, coin cell) and compatibility with modern low-voltage MCUs. |
| Operating Temperature | −40°C to +125°C - qualified for automotive cabin electronics, industrial motor control, and downhole sensing. |
Pinout & Package
The LMP7718MMX/NOPB is housed in an 8-pin VSSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for space-constrained PCB layouts in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Delivers rail-to-rail sourced/sunk output; requires layout isolation from sensitive inputs to avoid coupling. |
| 2: −IN A | Inverting input A | High-impedance CMOS node; guard ring and short trace routing critical for <100 fA bias integrity. |
| 3: +IN A | Non-inverting input A | Common-mode range includes V−; enables ground-referenced single-supply sensor interfacing. |
| 4: V− | Negative supply rail | Ground reference for single-supply operation; decoupling capacitor required within 2 mm. |
| 5: +IN B | Non-inverting input B | Independent channel input; shares same V−/V+ rails but no internal crosstalk (−90 dB @ 1 MHz). |
| 6: −IN B | Inverting input B | Matched to Channel A specs; supports dual-path signal conditioning without inter-channel gain mismatch. |
| 7: OUT B | Amplifier B output | Electrically identical to OUT A; allows independent buffering or differential drive without external components. |
| 8: V+ | Positive supply rail | Accepts 1.8V–5.5V; 100 nF ceramic + 1 µF tantalum decoupling mandatory for 88 MHz stability. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated architecture | Enables 5× higher bandwidth than unity-gain-stable equivalents (e.g., LMP7715) without increased supply current. |
| CMOS input stage | 100 fA input bias current ensures <1 µV error from 10 MΩ source impedance at 25°C. |
| Rail-to-rail output with enhanced drive | Sources >40 mA at 1.8V - supports direct driving of 600 Ω loads without external buffers. |
| Guaranteed 2.5V/5.0V performance | Full electrical specs validated at both voltages - eliminates design re-validation across supply options. |
| VSSOP-8 footprint | 3.0 × 3.0 mm body with 0.65 mm pitch - reduces board area by 60% vs. SOIC-8, critical for wearables and IoT nodes. |
Applications
| ADC Interface | Photodiode Amplifiers |
|---|---|
Use Scenario: Driving SAR or sigma-delta ADC inputs in portable ECG monitors with 1.8V supply and 100 kSPS sampling. IC Role / Device Role / Timing Role: Precision buffer and level shifter ensuring full-scale utilization of ADC input range while rejecting supply ripple. Use Value: 5.8 nV/√Hz noise and ±150 µV offset minimize quantization error; rail-to-rail swing avoids clipping on low-VDD rails. | Use Scenario: Transimpedance amplification of low-light photodiode signals in pulse oximetry sensors. IC Role / Device Role / Timing Role: Low-noise, high-Z current-to-voltage converter with bandwidth sufficient for 10 Hz–10 kHz physiological waveforms. Use Value: 100 fA bias current prevents diode leakage corruption; 88 MHz GBW supports >1 MHz small-signal response for fast LED pulsing. |
| Active Filters and Buffers | Medical Instrumentation |
Use Scenario: 4th-order anti-aliasing filter in portable ultrasound front-end with 2.5V supply and 10 MHz cutoff. IC Role / Device Role / Timing Role: High-speed, low-distortion gain stage in multiple-feedback (MFB) topology with precise pole placement. Use Value: 0.04% THD+N at 1 kHz and 88 MHz GBW enable sharp roll-off without phase distortion in time-critical imaging paths. | Use Scenario: Front-end signal conditioning for disposable glucose test strips using electrochemical amperometry. IC Role / Device Role / Timing Role: Ultra-low-input-current transducer amplifier capturing pA-level currents with minimal baseline drift. Use Value: 100 fA IB and −40°C to +125°C rating ensure accuracy across patient body temperatures and storage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Unity-gain stable, 2 MHz GBW, 0.03 µV/√Hz voltage noise, 125°C max temp | Better DC precision and lower noise, but insufficient bandwidth for >100 kHz active filters or fast ADC drivers | Select OPA2188AIDR only when ultra-low offset drift (<0.003 µV/°C) and unity-gain operation are mandatory. |
| ADA4625-2ARMZ | Unity-gain stable, 18 MHz GBW, 2.9 nV/√Hz noise, 10 pA IB, 125°C max temp | Lower noise and higher speed than OPA2188 but still 5× slower than LMP7718MMX/NOPB; no decompensation requirement | Choose ADA4625-2ARMZ when 18 MHz bandwidth suffices and design simplicity (no external compensation) outweighs need for 88 MHz. |
Compared with OPA2188AIDR and ADA4625-2ARMZ, the LMP7718MMX/NOPB trades unity-gain stability for 4.9× and 4.9× higher bandwidth respectively-enabling faster settling in data acquisition-but demands careful compensation design and minimum G = +10 operation.
Availability
LMP7718MMX/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, portable sensor interfaces, and low-voltage industrial data acquisition requiring stable component supply, long-term lifecycle support, and guaranteed 1.8V operation.
Supply support for LMP7718MMX/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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision amplifiers and signal chain ICs.
The LMP7718MMX/NOPB belongs to TI's LMP™ precision amplifier family, engineered specifically for low-voltage, low-noise, high-speed applications in battery-powered instrumentation, medical devices, and industrial sensing where CMOS input integrity and rail-to-rail output headroom are critical.
FAQ
Is the LMP7718MMX/NOPB unity-gain stable?
No, the LMP7718MMX/NOPB is decompensated and requires a minimum closed-loop gain of +10 for stability. Using it at G = +1 will cause oscillation unless external lead-lag compensation (RC network) is added. This architecture enables its 88 MHz GBW while consuming only 1.30 mA per channel-unachievable in unity-gain-stable alternatives at equivalent power.
What is the maximum load capacitance the LMP7718MMX/NOPB can drive without instability?
The LMP7718MMX/NOPB can directly drive up to 20 pF with stable operation at G = +10. For capacitive loads >20 pF (e.g., ADC input capacitance + PCB trace), a series resistor (10–50 Ω) must be placed between the output and load to isolate the capacitance and preserve phase margin. TI's datasheet Figure 36 confirms output impedance remains resistive up to 1 MHz under this condition.
Does the LMP7718MMX/NOPB support true 1.8V operation across its full temperature range?
The LMP7718MMX/NOPB is specified for 1.8V operation from 0°C to +125°C. At −40°C, minimum supply is 2.0V per Operating Ratings. All key parameters-including GBW, noise, and offset-are ensured at 2.5V and 5.0V across −40°C to +125°C, making it ideal for battery-powered medical devices that operate above freezing but must survive cold storage.
Can the LMP7718MMX/NOPB be used as a comparator?
No-the LMP7718MMX/NOPB is not designed for open-loop comparator use. Its internal positive feedback boosts output drive but compromises phase margin in saturation, causing slow recovery and potential latch-up. TI explicitly warns against open-loop usage in the datasheet. For comparator functions, pair it with a dedicated device like TLV3501 or use a comparator-input op amp such as LMH7322.
What is the recommended decoupling for the LMP7718MMX/NOPB V+ and V− pins?
TI specifies a 100 nF X7R ceramic capacitor placed within 2 mm of each supply pin, plus a bulk 1 µF tantalum or aluminum electrolytic capacitor at the board's main power entry point. The 100 nF cap must have low ESL (<1 nH) and be mounted directly adjacent to pins 4 (V−) and 8 (V+); shared decoupling between channels is acceptable but star grounding to the PCB's analog ground plane is mandatory.
LMP7718MMX/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:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 11.5V/µs
- Gain Bandwidth Product:
- 88 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 1.3mA (x2 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 2 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
LMP7718MMX/NOPB FAQ
1.How can I place an order for LMP7718MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP7718MMX/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 LMP7718MMX/NOPB reliable?
The price and inventory of LMP7718MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP7718MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP7718MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP7718MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP7718MMX/NOPB?
LMP7718MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP7718MMX/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 LMP7718MMX/NOPB?
For technical support, including LMP7718MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP7718MMX/NOPB requirements.
6.How does Aetrix verify that LMP7718MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP7718MMX/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 LMP7718MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP7718MMX/NOPB?
All LMP7718MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP7718MMX/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 LMP7718MMX/NOPB part is unused and in its original packaging.
Return procedure for LMP7718MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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