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Texas Instruments LMP7708MA/NOPB
- Part No.:
- LMP7708MA/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMP7708MA/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,518
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Product details
Overview
LMP7708MA/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 performance from 2.7 V to 12 V.
For engineers reviewing the LMP7708MA/NOPB datasheet, LMP7708MA/NOPB pinout, LMP7708MA/NOPB application, or LMP7708MA/NOPB equivalent, key selection criteria include guaranteed low input bias current (±200 fA), rail-to-rail swing within 40 mV of rails, stability at gain ≥6, and operation across −40°C to +125°C in space-constrained VSSOP-8 packaging.
Technical Context
The LMP7708MA/NOPB uses VIP50 CMOS process technology to integrate ultra-low input bias current with wide 2.7 V–12 V supply range and rail-to-rail common-mode input capability. Its decompensated architecture delivers 14 MHz GBWP and 5.6 V/µs slew rate at AV = 10 while maintaining 130 dB CMRR and 130 dB open-loop gain.
Input stage trimming minimizes CMRR glitches near supply rails; output stage drives loads down to 2 kΩ while swinging within 60 mV (high) and 50 mV (low) of rails at 5 V supply. It is not unity-gain stable and requires minimum closed-loop gain of 6 for phase margin assurance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual - enables matched-pair signal conditioning in instrumentation amplifiers or dual-path sensor interfaces without inter-device mismatch. |
| Input Offset Voltage (max) | ±220 µV over temperature - ensures ≤0.022% error in 1 V full-scale precision measurement systems. |
| Gain Bandwidth Product | 14 MHz at AV = 10 - supports stable 10× amplification of signals up to ~1.4 MHz with minimal phase lag. |
| Supply Current per Channel | 1.5 mA - balances speed and power for portable, battery-operated devices requiring >1 MHz bandwidth. |
| Input Bias Current | ±200 fA typical - preserves signal integrity in high-impedance pH, photodiode, or piezoelectric sensor front-ends. |
| Rail-to-Rail I/O | CMVR: −0.2 V to 5.2 V (at 5 V); VO swing: within 60 mV of V+ and 50 mV of V− - maximizes dynamic range in low-voltage systems. |
| Stability Condition | Stable at closed-loop gain ≥6 - mandates minimum gain setting in circuit design; not suitable for unity-gain buffers without external compensation. |
Pinout & Package
Package: 8-pin VSSOP (DGK), 3.0 mm × 3.0 mm body, 0.5 mm pitch, exposed thermal pad (not electrically connected).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance CMOS node; accepts signals from −0.2 V to V+ + 0.3 V; sensitive to PCB leakage and ESD. |
| 2 | Non-Inverting Input (Channel A) | Matched to Pin 1 for common-mode rejection; requires symmetric layout to preserve 130 dB CMRR. |
| 3 | Output (Channel A) | Capable of sourcing/sinking ≥40 mA short-circuit current; requires RISO for >100 pF capacitive loads. |
| 4 | V− (GND for single-supply) | Power ground reference; must be low-impedance; ties to thermal pad for improved θJA (235°C/W). |
| 5 | V+ (Supply) | Accepts 2.7 V–12 V; decoupling capacitor (0.1 µF) required within 5 mm for stability and PSRR optimization. |
| 6 | Non-Inverting Input (Channel B) | Independent, matched input pair; shares same CMOS topology and biasing as Channel A. |
| 7 | Inverting Input (Channel B) | Electrically identical to Pin 1; differential pair symmetry critical for crosstalk rejection (≥120 dB @ 1 kHz). |
| 8 | Output (Channel B) | Independent output drive; no internal crosstalk path; supports separate load conditions per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | ±200 fA typical - enables direct connection to >1 GΩ source impedances without significant voltage error. |
| Trimmed rail-to-rail input stage | Reduces CMRR glitch at supply rails by trimming NMOS/PMOS offset mismatch - maintains ≥84 dB CMRR to within 100 mV of rails. |
| Wide supply range | 2.7 V–12 V operation - supports single-cell Li-ion (3.0 V min), dual AA (3.2 V), and industrial 12 V rails without level-shifting. |
| Low input voltage noise | 9 nV/√Hz at 1 kHz - preserves SNR in low-level signal amplification (e.g., thermocouple, strain gauge) without added filtering. |
| High open-loop gain | 130 dB typical - ensures <0.001% gain error in closed-loop configurations with gains ≤1000. |
| Extended temperature range | −40°C to +125°C - qualified for automotive under-hood, industrial motor control, and outdoor sensor deployments. |
Applications
| High-Impedance Sensor Interface | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying output of a 10 GΩ pH electrode in handheld water quality meter operating on two AA cells. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input enabling full 0–14 pH range capture at 3.2 V supply. Use Value: ±200 fA input bias current prevents electrode polarization; 60 mV output swing headroom preserves 12-bit ADC dynamic range. |
Use Scenario: Signal conditioning front-end in portable gas detector with electrochemical sensor and 10-year battery life target. IC Role / Device Role / Timing Role: Dual-channel amplifier for sensor reference and active channels, minimizing offset drift over temperature. Use Value: 1.5 mA per channel enables >500-hour runtime; ±5 µV/°C TCVOS ensures <1.2 mV drift across −20°C to 50°C operating range. |
| High-Gain Amplifiers | DAC Buffer |
Use Scenario: 100× gain stage following a 16-bit DAC in programmable current source for LED driver calibration. IC Role / Device Role / Timing Role: Stable decompensated op-amp configured at AV = 100 with external compensation network. Use Value: 14 MHz GBWP supports 100 kHz small-signal bandwidth; 5.6 V/µs slew rate avoids distortion on 10 V step transitions. |
Use Scenario: Output buffer for 16-bit voltage-output DAC in medical infusion pump controller requiring monotonicity and low glitch energy. IC Role / Device Role / Timing Role: Rail-to-rail output driver isolating DAC core from varying load capacitance and cable impedance. Use Value: 40 mV output swing margin at 3.3 V supply ensures full 0–3.3 V DAC range utilization; 130 dB PSRR rejects digital supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision decompensated op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Unity-gain stable; lower 8.8 nV/√Hz noise; higher 1.8 mA supply current; SOIC-8 only. | Preferred where gain flexibility <6 is required; less suitable for fixed high-gain, low-power designs. | Select OPA2188AIDR if unity-gain operation or lower noise dominates over supply current and gain constraint. |
| ADA4625-2ACPZ-R7 | Higher 50 MHz GBWP; 10 V/µs slew rate; ±125 µV max VOS; requires ≥4.5 V supply; LFCSP-8 package. | Better for wideband precision applications (>5 MHz), but incompatible with sub-4.5 V battery operation. | Select ADA4625-2ACPZ-R7 when bandwidth >5 MHz and supply ≥4.5 V are available; avoid for 3.3 V or coin-cell systems. |
Compared with OPA2188AIDR and ADA4625-2ACPZ-R7, the LMP7708MA/NOPB uniquely combines decompensated speed (14 MHz GBWP at 1.5 mA), sub-3 V operation, and ultra-low bias current - making it optimal for fixed-gain, battery-constrained, high-impedance sensor nodes where unity-gain stability is unnecessary.
Availability
LMP7708MA/NOPB is available at Aetrix Electronics and suitable for high-impedance sensor interface, battery-powered instrumentation, and precision DAC buffering requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for LMP7708MA/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 application support infrastructure.
The LMP™ precision amplifier family - including the LMP7708MA/NOPB - was engineered for high-accuracy, low-power signal conditioning in sensor front-ends, portable instrumentation, and industrial measurement systems demanding robustness across extended temperature and supply ranges.
FAQ
What is the minimum stable gain for LMP7708MA/NOPB?
The LMP7708MA/NOPB is decompensated and specified stable only at closed-loop gains of 6 or higher. Attempting unity-gain or gain-of-2 configurations without external compensation will result in oscillation or excessive overshoot. For lower gains, consider unity-gain-stable alternatives like OPA2188AIDR or add a feedback capacitor to stabilize the loop.
Does LMP7708MA/NOPB support true rail-to-rail input at 2.7 V supply?
Yes. At 2.7 V supply, the LMP7708MA/NOPB guarantees input common-mode voltage range from −0.2 V to V+ + 0.3 V, meaning it accepts signals down to −0.2 V and up to 3.0 V - fully covering the 0–2.7 V span with margin. This is confirmed in the 3 V Electrical Characteristics table (CMVR = −0.2 V to 3.2 V).
What is the maximum capacitive load LMP7708MA/NOPB can drive without isolation?
The LMP7708MA/NOPB is not characterized for direct capacitive loading beyond 100 pF. Driving >100 pF loads (e.g., long cables, ADC inputs) requires an isolation resistor (RISO) between output and load, as shown in Figure 45 of the datasheet. Typical RISO values range from 10 Ω to 100 Ω depending on CL and required settling time.
How does input offset voltage drift behave over temperature for LMP7708MA/NOPB?
The LMP7708MA/NOPB has a typical input offset voltage drift of ±1 µV/°C, with a maximum of ±5 µV/°C over −40°C to +125°C. At 125°C, total drift contribution remains under ±0.5 mV relative to 25°C - critical for systems requiring <1 mV total error budget across automotive or industrial temperature ranges.
Is LMP7708MA/NOPB pin-compatible with other dual op-amps in VSSOP-8?
No. The LMP7708MA/NOPB pinout (IN−, IN+, OUT, V−, V+, IN+, IN−, OUT) is specific to its dual decompensated architecture and differs from standard dual op-amp pinouts (e.g., OPA2188 uses IN−, IN+, V−, OUT, IN−, IN+, V+, OUT). PCB layout must follow TI's DGK package diagram - no drop-in replacement is possible without board revision.
LMP7708MA/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:
- 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
LMP7708MA/NOPB FAQ
1.How can I place an order for LMP7708MA/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMP7708MA/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 LMP7708MA/NOPB reliable?
The price and inventory of LMP7708MA/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMP7708MA/NOPB is usually 5 days.
3.What payment methods are accepted for LMP7708MA/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMP7708MA/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMP7708MA/NOPB?
LMP7708MA/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMP7708MA/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 LMP7708MA/NOPB?
For technical support, including LMP7708MA/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMP7708MA/NOPB requirements.
6.How does Aetrix verify that LMP7708MA/NOPB is sourced from the original manufacturer or authorized distributors?
All LMP7708MA/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 LMP7708MA/NOPB meets industry standards.
7.What is the process for return or replacement of LMP7708MA/NOPB?
All LMP7708MA/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMP7708MA/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 LMP7708MA/NOPB part is unused and in its original packaging.
Return procedure for LMP7708MA/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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