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Texas Instruments LMV797MMX/NOPB
- Part No.:
- LMV797MMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMV797MMX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,040
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Product details
Overview
LMV797MMX/NOPB from Texas Instruments is a dual-channel, low-noise, CMOS-input operational amplifier optimized for low-voltage, high-fidelity signal conditioning. It delivers 5.8 nV/√Hz input voltage noise, 17 MHz unity-gain bandwidth, and rail-to-rail output swing within a 1.8 V to 5.5 V supply range - enabling precision photodiode amplification and sensor interface in battery-powered medical and industrial instrumentation.
For engineers reviewing the LMV797MMX/NOPB datasheet, LMV797MMX/NOPB pinout, LMV797MMX/NOPB application, or LMV797MMX/NOPB equivalent, key selection criteria include verified 100 fA input bias current, guaranteed 2.5 V/5.0 V performance, −40°C to 125°C operating temperature, THD+N ≤ 0.01% at 1 kHz into 600 Ω, and stable operation driving capacitive loads up to 120 pF without external compensation.
Technical Context
The LMV797MMX/NOPB employs a CMOS input stage with femtoampere-level bias current and a proprietary output stage delivering >40 mA sourcing capability at 1.8 V while maintaining rail-to-rail swing. Its 17 MHz gain-bandwidth product and 9.5 V/μs slew rate support wideband closed-loop configurations including transimpedance and active filtering.
It features an input common-mode range extending to the negative rail (ground-sensing), 85 dB minimum open-loop gain (RL = 10 kΩ), and robust PSRR (≥80 dB) and CMRR (≥75 dB) across 1.8–5.5 V supplies - making it suitable for single-supply, low-noise analog front-ends where DC accuracy and AC fidelity are co-critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 5.8 nV/√Hz @ 1 kHz - enables detection of sub-microvolt signals in sensor interfaces |
| Unity-Gain Bandwidth | 17 MHz - supports stable gain ≥10 up to ~1.7 MHz in transimpedance configurations |
| Supply Current per Channel | 1.30 mA @ 5 V - allows dual-channel amplification in ultra-low-power portable systems |
| Rail-to-Rail Output Swing | 25 mV from rail @ 10 kΩ - maximizes dynamic range at 1.8 V supply, critical for battery lifetime |
| Input Bias Current | 100 fA max @ 25°C - preserves signal integrity in high-impedance photodiode and piezoelectric sensor nodes |
| Total Harmonic Distortion + Noise | 0.01% @ 1 kHz, 600 Ω - meets audio preamplifier and medical-grade signal chain linearity requirements |
| Operating Temperature Range | −40°C to 125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
LMV797MMX/NOPB is housed in an 8-pin VSSOP (DGK) package with 0.65 mm pitch and 3.0 mm × 3.0 mm footprint - optimized for space-constrained PCB layouts in portable instrumentation and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail voltage swing; capable of sourcing >40 mA at 1.8 V |
| 2 (−IN A) | Inverting input A | High-impedance CMOS node; connects to feedback network in transimpedance or inverting topologies |
| 3 (+IN A) | Non-inverting input A | Ground-sensing input; common-mode range includes V− (0 V) in single-supply operation |
| 4 (V−) | Negative supply / ground | Reference for both inputs and output; must be low-impedance for noise-sensitive applications |
| 5 (+IN B) | Non-inverting input B | Dual-channel independence: electrically isolated from Channel A; shares V− and V+ rails |
| 6 (−IN B) | Inverting input B | Independent high-Z node for second signal path; supports differential or dual-sensor architectures |
| 7 (OUT B) | Amplifier B output | Identical performance to OUT A; enables dual-path signal conditioning without cross-talk penalty |
| 8 (V+) | Positive supply | Accepts 1.8–5.5 V; internal regulation ensures consistent noise and bandwidth across full range |
Key Features
| Feature | Design Value |
|---|---|
| Low 1/f noise corner | 400 Hz - minimizes drift and low-frequency artifacts in DC-coupled sensor amplifiers |
| Capacitive load tolerance | Stable with up to 120 pF @ unity gain - eliminates need for isolation resistors in many layout-constrained designs |
| Guaranteed 2.5 V/5.0 V specs | Full electrical characterization at both voltages - removes design uncertainty when scaling supply rails |
| Input common-mode capacitance | ≤1.5 pF @ VCM = 0 V - reduces high-frequency phase error in precision integrators and filters |
| Output short-circuit protection | Rated for 1.5 ms pulses - safeguards against transient faults during system bring-up and ESD events |
Applications
| Photodiode Amplification | Active Filter & Buffer |
|---|---|
Use Scenario: Converting nanoamp-level photocurrent from silicon or InGaAs photodiodes into measurable voltage in optical smoke detectors and pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10⁶–10⁸ Ω feedback resistor; sets gain, bandwidth, and noise floor of front-end. Use Value: 5.8 nV/√Hz noise density and 100 fA bias current preserve SNR for weak-light detection down to single-photon levels. | Use Scenario: Implementing 2nd-order Sallen-Key or MFB low-pass filters in EEG front-ends and vibration monitoring systems. IC Role / Device Role / Timing Role: Dual-channel op amp providing gain, buffering, and filter pole placement; one channel as integrator, one as summer/buffer. Use Value: 17 MHz GBW enables accurate filter response up to 100 kHz with <0.1 dB passband ripple and monotonic roll-off. |
| Medical Instrumentation | Sensor Interface |
Use Scenario: Amplifying microvolt-level bio-signals (ECG, EMG) in portable diagnostic devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer; rejects electrode offset and maintains CMRR over temperature. Use Value: Rail-to-rail output swing at 1.8 V extends usable ADC input range by >30%, improving effective resolution in 12-bit systems. | Use Scenario: Conditioning outputs from MEMS accelerometers, RTDs, and strain gauges in industrial IoT nodes with 10-year battery life targets. IC Role / Device Role / Timing Role: Low-power signal conditioner with programmable gain and anti-alias filtering prior to SAR ADC sampling. Use Value: 1.30 mA/channel supply current enables continuous sensing mode at <2.5 μA average power with duty-cycled operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2376IDGKR | Lower noise (4.5 nV/√Hz), higher supply current (750 μA/channel), same 8-pin VSSOP package | Better suited for ultra-low-noise audio preamps; less optimal for battery-limited sensor nodes due to higher quiescent draw | Select when noise dominates over power budget; verify stability with same feedback network |
| ADA4661-2ARZ | Higher input bias current (1 pA), wider supply range (3–36 V), SOIC-8 package only | Preferred for industrial sensors requiring >5 V headroom or high-voltage rail compatibility; not drop-in for 1.8 V systems | Choose for multi-supply systems or legacy board reuse; requires layout revision for SOIC footprint |
Compared with OPA2376IDGKR and ADA4661-2ARZ, the LMV797MMX/NOPB uniquely balances 5.8 nV/√Hz noise, 1.3 mA/channel consumption, and 1.8 V operation - making it the optimal choice for compact, battery-powered, wideband sensor signal chains where both noise and energy efficiency are constrained.
Availability
LMV797MMX/NOPB is available at Aetrix Electronics and suitable for photodiode amplification, active filtering, medical instrumentation, and sensor interface applications requiring stable component supply across automotive, industrial, and portable electronics programs.
Supply support for LMV797MMX/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 op amps and low-power signal conditioning ICs.
The LMV797MMX/NOPB belongs to TI's LMV796/LMV797 family - engineered specifically for low-voltage, low-noise sensor front-ends in medical, industrial, and automotive applications where rail-to-rail operation and femtoampere input bias are essential.
FAQ
What is the maximum capacitive load the LMV797MMX/NOPB can drive stably in unity-gain configuration?
The LMV797MMX/NOPB is characterized to remain stable with up to 120 pF capacitive load in unity-gain follower configuration without external compensation. This is validated per TI's SNOSAU9D datasheet Figure 39–40 (Phase Margin vs. CL). Exceeding 120 pF requires isolation resistor (RISO) or feedback capacitor (CF) per Figure 45. The LMV797MMX/NOPB's output stage architecture enables this high capacitive drive capability while maintaining >45° phase margin.
Does the LMV797MMX/NOPB support true rail-to-rail input common-mode range?
No - the LMV797MMX/NOPB features rail-to-rail *output* swing but its input common-mode range extends only to the negative rail (V−), not the positive rail. Per datasheet Section 7.5, CMVR is −0.3 V to (V+ − 1.3 V) at 5 V supply, meaning the upper limit is ~3.7 V. This ground-sensing capability enables single-supply operation with DC-coupled sensors referenced to 0 V, but high-side sensing above V+ − 1.3 V requires level-shifting. The LMV797MMX/NOPB's input stage is CMOS-based, not RRIO.
What is the guaranteed minimum open-loop voltage gain (AVOL) for the LMV797MMX/NOPB at 25°C and 5 V supply?
The LMV797MMX/NOPB guarantees a minimum open-loop voltage gain of 78 dB (≈7,940 V/V) at TA = 25°C, V+ = 5 V, V− = 0 V, RL = 10 kΩ, and VOUT = 0.3 V to 4.7 V, as specified in Table 2 (5V Electrical Characteristics). This gain ensures ≤0.1% closed-loop error for gains up to 100 when using precision resistors, supporting high-accuracy instrumentation amplifier topologies where the LMV797MMX/NOPB serves as a gain block.
Can the LMV797MMX/NOPB operate reliably at 1.8 V supply across the full −40°C to 125°C temperature range?
No - per Operating Ratings (Section 6.2), the LMV797MMX/NOPB is specified for 1.8 V operation only from 0°C to 125°C. At −40°C, the minimum functional supply voltage is 2.0 V. For full-temperature-range operation down to −40°C, the device must be supplied with ≥2.0 V. This limitation is process-dependent and reflects guaranteed performance margins; using 1.8 V at −40°C may result in degraded bandwidth, increased offset drift, or instability. Always consult TI's SNOSAU9D Revision March 2013 for validated conditions.
How does the LMV797MMX/NOPB's input referred current noise compare to its voltage noise in high-impedance sensor applications?
The LMV797MMX/NOPB exhibits 0.01 pA/√Hz input-referred current noise at 1 kHz, which is exceptionally low due to its CMOS input stage. When paired with high-impedance sources (>100 kΩ), this current noise contributes significantly less to total output noise than its 5.8 nV/√Hz voltage noise - making it ideal for photodiode (typically 100 MΩ–1 GΩ) and piezoelectric sensor interfaces. For example, with a 100 MΩ source impedance, current noise contributes ~1.0 μV/√Hz, while voltage noise dominates at 5.8 nV/√Hz. The LMV797MMX/NOPB's balanced noise profile ensures optimal SNR in both voltage- and current-driven transducers.
LMV797MMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- 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:
- 11.5V/µs
- Gain Bandwidth Product:
- 17 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.3mA (x2 Channels)
- Current - Output / Channel:
- 60 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
LMV797MMX/NOPB FAQ
1.How can I place an order for LMV797MMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV797MMX/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 LMV797MMX/NOPB reliable?
The price and inventory of LMV797MMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV797MMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV797MMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV797MMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV797MMX/NOPB?
LMV797MMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV797MMX/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 LMV797MMX/NOPB?
For technical support, including LMV797MMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV797MMX/NOPB requirements.
6.How does Aetrix verify that LMV797MMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV797MMX/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 LMV797MMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV797MMX/NOPB?
All LMV797MMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV797MMX/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 LMV797MMX/NOPB part is unused and in its original packaging.
Return procedure for LMV797MMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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