Analog Devices Inc./Maxim Integrated MAX4309ESA

Overview

MAX4309ESA from Maxim Integrated is a high-speed, ultra-low-distortion voltage-feedback operational amplifier optimized for closed-loop gains ≥10V/V. It delivers 200MHz −3dB bandwidth, 1200V/µs slew rate, and −83dBc spurious-free dynamic range at 5MHz (V_OUT = 2V_p-p, R_L = 100Ω), enabling precision RF signal conditioning in ADC/DAC preamplifier stages.

For engineers reviewing the MAX4309ESA datasheet, MAX4309ESA pinout, MAX4309ESA application, or MAX4309ESA equivalent, this page provides verified electrical specifications, SO-8 package layout, differential gain/phase performance for video systems, full-power bandwidth (200MHz), and real-world capacitive-load drive guidance using isolation resistors.

Technical Context

The MAX4309ESA employs a voltage-feedback architecture with internal compensation tailored for stable operation at minimum closed-loop gain of +10V/V. Its design emphasizes wideband linearity and low harmonic distortion across 5–20MHz RF bands, supported by 300Ω output impedance control and integrated short-circuit protection.

It operates from dual ±4.5V to ±5.5V supplies, achieves ±2.9V output swing into 100Ω, and maintains 0.004%/0.008° differential gain/phase accuracy at 3.58MHz - critical for broadcast video signal integrity and high-definition TV front-end buffering.

Key Specifications

Pinout & Package

MAX4309ESA is housed in an 8-pin SOIC-N (Small Outline Integrated Circuit, Narrow) package with standard 1.27mm pitch, RoHS-compliant lead finish, and −40°C to +85°C operating temperature range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH6723MA/NOPB and ADA4817-1ARMZ, MAX4309ESA offers the optimal balance of guaranteed +10V/V stability, −83dBc SFDR, and SO-8 footprint - simplifying layout while meeting broadcast and instrumentation linearity requirements without external components.

Availability

MAX4309ESA is available at Aetrix Electronics and suitable for high-speed data acquisition, broadcast video infrastructure, and RF receiver front-ends requiring stable component supply with guaranteed long-term availability.

Supply support for MAX4309ESA 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and medical applications.

The MAX4309ESA belongs to Maxim's ultra-low-distortion op amp family targeting RF signal chain applications where SFDR, gain flatness, and video fidelity outweigh raw bandwidth - specifically engineered for ADC preamps, video line drivers, and IF amplifiers.

FAQ

What is the minimum stable closed-loop gain for MAX4309ESA?

The MAX4309ESA is internally compensated for stable operation at a minimum closed-loop gain of +10V/V. Attempting to use it at lower gains (e.g., +5V/V or unity gain) risks oscillation and degraded transient response. For lower-gain applications, the MAX4308ESA (stable at +5V/V) or MAX4109ESA (stable at +2V/V) are appropriate alternatives. Always verify stability with actual layout parasitics using the recommended isolation resistor for capacitive loads.

Does MAX4309ESA support single-supply operation?

No, MAX4309ESA is specified and characterized exclusively for dual-supply operation from ±4.5V to ±5.5V. Its input common-mode range extends to ±2.5V and output swing reaches ±2.9V into 100Ω - both dependent on symmetric rails. Single-supply use violates absolute maximum ratings and causes clipping, increased distortion, and potential damage. For single-supply high-speed op amps, consider the MAX44260 or AD8065 families.

How should I drive a 50Ω coaxial cable with MAX4309ESA?

To drive a 50Ω coaxial cable with MAX4309ESA, terminate the far end in 50Ω and place a 50Ω series isolation resistor at the amplifier output (pin 6). This forms a matched source termination, eliminating reflections and preserving signal integrity up to 200MHz. Do not omit the isolation resistor - direct connection causes peaking and instability due to cable capacitance. Confirm layout with ≤2mm trace length between pin 6 and the resistor.

What is the maximum capacitive load MAX4309ESA can drive without oscillation?

MAX4309ESA becomes unstable with >5pF capacitive load unless isolated by a series resistor. With a 15Ω isolation resistor, it safely drives up to 50pF; with 47Ω, up to 100pF. Figure 1b in the datasheet gives exact RS vs. C_L values. Always simulate step response in SPICE using the provided macromodel and validate with oscilloscope measurements of overshoot and ringing on the actual PCB.

Is MAX4309ESA pin-compatible with other devices in the MAX4108/MAX4309 family?

Yes, MAX4309ESA shares identical SO-8 pinout and footprint with MAX4108ESA, MAX4109ESA, and MAX4308ESA - all feature N.C. on pin 1, IN− on pin 2, IN+ on pin 3, VEE on pins 4–5, OUT on pin 6, and VCC on pins 7–8. However, gain stability differs: substituting MAX4309ESA for MAX4109ESA in a +2V/V circuit will cause oscillation. Verify closed-loop gain compatibility before drop-in replacement.