Texas Instruments LMP7709MA/NOPB

Overview

LMP7709MA/NOPB from Texas Instruments is a quad-channel, decompensated, precision CMOS-input operational amplifier with rail-to-rail input and output, ±220 µV max input offset voltage, 9 nV/√Hz input voltage noise, and stable operation at gain ≥6 across −40°C to +125°C. It delivers 2.9 mA supply current per channel and supports 2.7V–12V single-supply or ±5V dual-supply operation in sensor interface and high-gain instrumentation circuits.

For engineers reviewing the LMP7709MA/NOPB datasheet, LMP7709MA/NOPB pinout, LMP7709MA/NOPB application, or LMP7709MA/NOPB equivalent, key selection criteria include guaranteed low input bias current (±200 fA), rail-to-rail swing within 40 mV of rails, CMRR ≥130 dB, decompensated stability at AV ≥6, and TSSOP-14 package compatibility for space-constrained PCB layouts.

Technical Context

The LMP7709MA/NOPB uses VIP50 CMOS process technology to integrate ultra-low input bias current with wide 2.7V–12V supply range and rail-to-rail common-mode input capability. Its trimmed complementary input stage minimizes CMRR glitches and ensures matched NMOS/PMOS offset contributions.

This decompensated architecture achieves 14 MHz gain-bandwidth product at AV = 10 with 5.6 V/µs slew rate and 130 dB open-loop gain, while maintaining stability only at gains ≥6-requiring external compensation for unity-gain or AV < 6 configurations.

Key Specifications

Pinout & Package

The LMP7709MA/NOPB is housed in a 14-pin TSSOP package (PW package code), 5.0 mm × 4.4 mm footprint, 0.65 mm pitch, with exposed thermal pad for enhanced power dissipation in multi-channel designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op-amp applications.

Compared with OPA2189IDR and ADA4522-4ARUZ, the LMP7709MA/NOPB uniquely combines decompensated high-speed performance (14 MHz GBWP), quad-channel integration in TSSOP-14, rail-to-rail input *and* output, and ultra-low bias current - making it optimal for multi-channel, high-impedance, gain ≥6 precision signal chains where layout space and supply efficiency are constrained.

Availability

LMP7709MA/NOPB is available at Aetrix Electronics and suitable for high-impedance sensor interface, battery-powered instrumentation, and high-gain amplifier applications requiring stable component supply, extended temperature support, and quad-channel integration in compact TSSOP-14 packaging.

Supply support for LMP7709MA/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 LMP7709MA/NOPB-is engineered for high-accuracy signal conditioning in sensor interfaces, medical devices, test equipment, and industrial control systems demanding low offset, ultra-low bias current, and wide supply flexibility.

FAQ

What is the minimum stable closed-loop gain for LMP7709MA/NOPB?

The LMP7709MA/NOPB is decompensated and guaranteed stable only at closed-loop gains of 6 or higher. Operating at AV < 6 requires external compensation (e.g., capacitor from output to inverting input) to ensure phase margin >45° and prevent oscillation. This is explicitly defined in the datasheet's "Stable at a Gain of 10 or Higher" feature and Figure 30 open-loop response.

Does LMP7709MA/NOPB support true rail-to-rail input with CMOS inputs?

Yes, the LMP7709MA/NOPB features a specially trimmed CMOS rail-to-rail input stage that accepts common-mode voltages from V− to V+, including both supply rails. Unlike basic CMOS op-amps, its complementary NMOS/PMOS input pair is laser-trimmed to minimize CMRR degradation near the rails-verified in Figure 15 and Table "Input Common-Mode Voltage Range" (−0.2 V to 5.2 V at 5 V supply).

What is the maximum capacitive load LMP7709MA/NOPB can drive without isolation?

The LMP7709MA/NOPB is not characterized for direct capacitive load driving in unity-gain follower configuration. Per Application Information Section "Capacitive Load", an isolation resistor (RISO) is required between output and load capacitance (CL). Stability with CL > 100 pF is only assured when RISO ≥ 50 Ω, with larger RISO values improving phase margin at the cost of reduced output swing and current drive.

How does LMP7709MA/NOPB achieve ±200 fA input bias current?

The LMP7709MA/NOPB achieves ±200 fA typical input bias current through Texas Instruments' VIP50 CMOS process, which uses large-area input transistors with optimized gate oxide thickness and layout shielding. This design minimizes gate leakage and surface-state current-confirmed in Figure 18–23 bias current vs. VCM plots and Electrical Characteristics table (IB = ±0.2 fA typ at 25°C).

Is LMP7709MA/NOPB qualified for automotive applications?

The LMP7709MA/NOPB is specified for −40°C to +125°C operating temperature and meets JEDEC JESD22-A115-A (MM) and JESD22-C101-C (CDM) ESD standards, but it is not AEC-Q200 qualified. For automotive use, TI recommends verifying system-level qualification per ISO/TS 16949; the device is widely deployed in industrial and medical systems with equivalent thermal and reliability requirements.