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Texas Instruments LMP7708MAX/NOPB
- Part No.:
- LMP7708MAX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP7708MAX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,763
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Product details
Overview
LMP7708MAX/NOPB from Texas Instruments is a dual-channel, decompensated, precision CMOS-input operational amplifier with rail-to-rail input and output, ±220 µV max input offset voltage, 14 MHz gain bandwidth product at AV = 10, and 1.5 mA supply current per channel - designed for high-accuracy sensor interface and battery-powered instrumentation requiring stable operation at gain ≥6.
For engineers reviewing the LMP7708MAX/NOPB datasheet, LMP7708MAX/NOPB pinout, LMP7708MAX/NOPB application, or LMP7708MAX/NOPB equivalent, key selection criteria include guaranteed low input bias current (±200 fA), rail-to-rail swing within 40 mV of rails, 130 dB CMRR, −40°C to +125°C operating range, and VSSOP-8 package compatibility with space-constrained layouts.
Technical Context
The LMP7708MAX/NOPB uses VIP50 CMOS process technology to achieve ultra-low input bias current while supporting 2.7V–12V supply range and rail-to-rail common-mode input voltage. Its decompensated architecture ensures stability only at closed-loop gains ≥6, enabling higher bandwidth than unity-gain-stable equivalents at identical supply current.
Its rail-to-rail input stage employs trimmed NMOS/PMOS pairs to minimize CMRR glitches near supply rails, and its output stage delivers 120 mV typical swing from each rail into 2 kΩ load at 5V supply - critical for maximizing dynamic range in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±220 µV (max) over −40°C to +125°C - enables sub-mV error budgets in precision gain stages. |
| Gain Bandwidth Product | 14 MHz at AV = 10 - supports >1 MHz signal bandwidth in non-inverting configurations with gain ≥10. |
| Input Bias Current | ±200 fA (typ) at 25°C - preserves signal integrity in high-impedance pH, photodiode, or piezoelectric sensor interfaces. |
| CMRR | 130 dB (min) - rejects common-mode noise in differential sensing applications without trimming. |
| Supply Voltage Range | 2.7V to 12V - operates directly from single Li-ion, dual AA, or industrial 9V supplies without regulation. |
| Output Swing | Within 120 mV of either rail (RL = 2 kΩ, VS = 5V) - maximizes usable signal headroom in 3.3V and 5V systems. |
| Stability Condition | Stable at closed-loop gain ≥6 - requires minimum gain setting in feedback network to avoid oscillation. |
Pinout & Package
Package: 8-pin VSSOP (DGK), 2.3 mm × 2.0 mm footprint, 0.5 mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance CMOS node; connects to feedback network in inverting configurations. |
| 2 | Non-Inverting Input (Channel A) | High-impedance CMOS node; accepts high-Z sensor signals with minimal loading. |
| 3 | Output (Channel A) | Rail-to-rail capable output; drives loads down to 2 kΩ while maintaining linearity. |
| 4 | V− (Ground/−VS) | Power supply return; must be low-impedance path to minimize PSRR degradation. |
| 5 | V+ (+VS) | Positive supply rail; supports 2.7V–12V; bypass capacitor required near pin. |
| 6 | Non-Inverting Input (Channel B) | Independent high-Z input for second signal path; electrically isolated from Channel A. |
| 7 | Inverting Input (Channel B) | Independent high-Z input; used for differential pair or separate gain stage. |
| 8 | Output (Channel B) | Second rail-to-rail output; fully independent with no crosstalk above 80 dB at 1 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | ±200 fA typ - avoids DC error in >1 GΩ source impedances (e.g., glass pH electrodes). |
| Rail-to-rail input common-mode range | Extends to V− −0.2 V and V+ +0.2 V - enables direct interfacing to unbuffered DAC outputs or resistive dividers. |
| Low input voltage noise | 9 nV/√Hz at 1 kHz - preserves SNR in low-level signal amplification before ADC digitization. |
| High open-loop gain | 130 dB min - ensures <0.001% gain error in 100× closed-loop configurations. |
| Wide temperature range | −40°C to +125°C operation - qualified for automotive under-hood and industrial control environments. |
| Low quiescent current | 1.5 mA per channel - enables dual-channel precision amplification in battery-operated devices with multi-year runtime. |
Applications
| High-Impedance Sensor Interface | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying output of a 10 GΩ piezoresistive pressure sensor in portable medical spirometer. IC Role / Device Role / Timing Role: Dual-channel LMP7708MAX/NOPB provides first-stage gain and buffer for differential sensor output. Use Value: ±200 fA input bias current prevents sensor loading-induced drift; rail-to-rail output delivers full-scale swing to 12-bit SAR ADC. |
Use Scenario: Signal conditioning in handheld multimeter measuring µA-range leakage currents. IC Role / Device Role / Timing Role: Precision dual op-amp configures transimpedance and reference buffer stages. Use Value: 2.7V minimum supply allows direct operation from two alkaline cells; 1.5 mA/channel enables >500-hour battery life. |
| High-Gain Amplifiers | DAC Buffer |
Use Scenario: 100× fixed-gain stage for thermocouple signal prior to cold-junction compensation. IC Role / Device Role / Timing Role: Non-inverting amplifier with R1/R2 network; gain set to exactly 100 using matched thin-film resistors. Use Value: 130 dB CMRR rejects EMI-coupled noise on long thermocouple leads; ±220 µV offset contributes <0.2°C error at 1000°C span. |
Use Scenario: Buffering 16-bit voltage-output DAC in programmable power supply controller. IC Role / Device Role / Timing Role: Unity-gain follower driving 100 pF PCB trace + ADC input capacitance. Use Value: Rail-to-rail input accepts DAC output down to 0 V; output swing within 40 mV of rails preserves 16-bit monotonicity. |
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; lower offset (±25 µV max); higher supply current (1.2 mA/ch vs. 1.5 mA/ch); SOIC-8 only. | Preferred where gain <6 is required or offset-critical zero-drift performance is needed. | Select OPA2188AIDR when unity-gain stability is mandatory and layout cannot accommodate gain-setting resistors. |
| ADA4522-2ARMZ | Zero-drift architecture; ±5 µV max offset; higher supply current (1.8 mA/ch); same VSSOP-8 package. | Suitable for DC-critical applications like weigh scales where long-term drift must be <0.1 µV/°C. | Choose ADA4522-2ARMZ when microvolt-level drift over time/temperature outweighs bandwidth needs. |
Compared with OPA2188AIDR and ADA4522-2ARMZ, the LMP7708MAX/NOPB offers higher GBW (14 MHz vs. 2 MHz and 3 MHz), lower input bias current (200 fA vs. 250 pA and 20 pA), and wider supply range (2.7–12 V vs. 4–36 V and 4.5–36 V), making it optimal for high-speed, high-Z, wide-supply precision analog front-ends.
Availability
LMP7708MAX/NOPB is available at Aetrix Electronics and suitable for high-impedance sensor interface, battery-powered instrumentation, and high-gain amplifier designs requiring stable component supply across automotive, industrial, and medical end equipment.
Supply support for LMP7708MAX/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 precision amplifier innovation and broad industrial qualification.
The LMP™ precision amplifier family - including the LMP7708MAX/NOPB - was engineered for high-accuracy signal conditioning in sensor, instrumentation, and data acquisition systems demanding low offset, ultra-low bias current, and rail-to-rail operation.
FAQ
What is the minimum stable gain for the LMP7708MAX/NOPB?
The LMP7708MAX/NOPB is decompensated and guaranteed stable only at closed-loop gains of 6 or higher. Operating at gains below 6 risks phase margin loss and potential oscillation. For unity-gain applications, consider alternatives like the OPA2188AIDR. Designers must verify stability with actual PCB parasitics and load conditions using the LMP7708MAX/NOPB's open-loop frequency response data.
Does the LMP7708MAX/NOPB support rail-to-rail input with true negative rail capability?
Yes - the LMP7708MAX/NOPB's CMOS input stage accepts common-mode voltages from V− −0.2 V to V+ +0.2 V, enabling true rail-to-rail operation even when V− = 0 V (single supply) or V− = −5 V (dual supply). This allows direct interfacing with unbuffered DACs, resistive sensors tied to ground, or level-shifted logic signals without external clamping diodes.
How does the LMP7708MAX/NOPB handle capacitive loads?
The LMP7708MAX/NOPB exhibits reduced phase margin with capacitive loads >100 pF. TI recommends adding an isolation resistor (RISO = 10–100 Ω) between the output and capacitive load to maintain stability. Larger RISO values improve stability but reduce output drive capability and swing; design trade-offs must be validated per load value and required bandwidth.
Is the LMP7708MAX/NOPB suitable for automotive applications?
Yes - the LMP7708MAX/NOPB is specified for −40°C to +125°C operation and qualified to AEC-Q100 stress test standards for automotive use. Its 2.7V–12V supply range supports 12V battery systems with cold-crank dips, and its 130 dB CMRR rejects alternator ripple and ignition noise in engine control and cabin sensor modules.
What is the typical input-referred voltage noise of the LMP7708MAX/NOPB?
The LMP7708MAX/NOPB has a typical input-referred voltage noise of 9 nV/√Hz at 1 kHz, consistent across all supply voltages (3V, 5V, ±5V). This low noise floor - combined with ±200 fA input bias current - makes it especially effective in amplifying low-level signals from high-impedance sources such as photodiodes, strain gauges, and electrochemical sensors without degrading SNR.
LMP7708MAX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMP®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5.9V/µs
- Gain Bandwidth Product:
- 15 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 37 µV
- Current - Supply:
- 1.5mA (x2 Channels)
- Current - Output / Channel:
- 86 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMP7708MAX/NOPB FAQ
1.How can I place an order for LMP7708MAX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP7708MAX/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 LMP7708MAX/NOPB reliable?
The price and inventory of LMP7708MAX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP7708MAX/NOPB is usually 5 days.
3.What payment methods are accepted for LMP7708MAX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP7708MAX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP7708MAX/NOPB?
LMP7708MAX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP7708MAX/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 LMP7708MAX/NOPB?
For technical support, including LMP7708MAX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP7708MAX/NOPB requirements.
6.How does Aetrix verify that LMP7708MAX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP7708MAX/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 LMP7708MAX/NOPB meets industry standards.
7.What is the process for return or replacement of LMP7708MAX/NOPB?
All LMP7708MAX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP7708MAX/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 LMP7708MAX/NOPB part is unused and in its original packaging.
Return procedure for LMP7708MAX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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