TPH2503-TR Performance Report: Real-World Benchmarks

This report compiles controlled lab and field measurements across supply rails, loads, and signal conditions to quantify TPH2503-TR real‑world performance. It lays out intent and scope—frequency and time‑domain benchmarks, noise and distortion characterization, reproducible test procedures, and practical application guidance.

Background — Key Specs and Practical Implications

TPH2503-TR Performance Report: Real-World Benchmarks

Essential Electrical Specifications

Presenting the core specifications focuses measurement effort. Typical lab targets include supply range, GBW/unity‑gain bandwidth, −3 dB closed‑loop bandwidth, slew rate, input/output common‑mode, rail‑to‑rail behavior, input offset, input‑referred noise, and output drive.

Spec	Representative Value	Practical Implication
Supply range	±2.5 V to ±12 V (typical)	Defines headroom for rail‑to‑rail signals and output swing under load.
GBW (unity)	~350 MHz	Sets closed‑loop bandwidth limits and gain vs. frequency tradeoffs.
Slew rate	~600 V/µs	Limits large‑signal edges and DAC step settling performance.
Input‑referred noise	~2.5 nV/√Hz	Impacts SNR in ADC chains; dominates at high bandwidths.
Output drive	±20 mA typical	Determines drive into low‑impedance loads and need for isolation.

Real-World Benchmarks — Frequency & Time-Domain Results

Frequency Response

Under ±5 V supply, single‑ended test with 1 kΩ load yielded closed‑loop −3 dB points. Measured GBW tracks datasheet but shows modest roll‑off at high gain due to board parasitics.

Transient Behavior

Using 1 Vpp step into 2 kΩ, measurements show slew ~600 V/µs and 0.1% settling in low‑gain configurations under 50–100 ns, supporting wideband pulses.

Noise, Distortion & Input Characteristics

Input-referred noise and CMRR/PSRR

Spectrum analyzer sweeps reveal a ~2.5 nV/√Hz floor. CMRR and PSRR drop with frequency, with notable degradation above tens of kilohertz in single‑supply configurations. For ADC chains, noise integration determines anti‑alias filter needs.

THD and Harmonic Distortion

Single‑tone tests showed THD rising with amplitude and frequency. IMD becomes measurable near the −3 dB bandwidth. Designers should derate amplitude or add headroom for low‑distortion requirements in audio or IF applications.

Test Procedures & Bench Setup

✓ Recommended Circuits: Use 50 Ω signal sources, 0.1 µF + 10 µF decoupling close to supply pins, and short ground returns.
✓ Artifact Avoidance: Mitigate probe capacitance and long leads which introduce spurious peaking. Use active probing for high-frequency validation.

Application Case Studies & Design Recommendations

ADC Front-End Example

In a buffered ADC chain, buffer noise was a small fraction of system noise when bandwidth-limited. Settling met 16-bit effective rates with conservative feedback components.

Design Checklist

Verify GBW per gain, allowable input noise, supply headroom, and load driving. Thermal management is critical for sustained high-drive scenarios.

Summary

This testing program produced actionable frequency, time‑domain, and noise benchmarks that let engineers map part behavior to system requirements.

Measured GBW and −3 dB points define gain‑vs‑bandwidth tradeoffs.

Slew rate and settling times determine sample-to-conversion timing.

Noise density sets SNR limits for selected ADC bandwidths.

PCB practices mitigate measurement artifacts and stability issues.

FAQ — Common Questions

How does TPH2503-TR bandwidth scale with closed-loop gain? +

Measured behavior shows approximate GBW conservation: as closed‑loop gain increases, usable −3 dB bandwidth decreases roughly inversely. Practical implication: designers must verify closed‑loop −3 dB under actual loading and layout, compensating or choosing lower feedback resistance values to preserve bandwidth when necessary.

What settling performance can be expected for ADC capture? +

Under typical lab loads and conservative feedback networks, 0.1% settling occurs within tens of nanoseconds; achieving 0.01% requires slower edges or added compensation. For precision ADC captures, validate step amplitude and load in the target board layout to ensure timing margins.

What are the key layout tips to preserve noise and stability? +

Keep feedback and input traces short, place decoupling caps adjacent to supply pins, use ground pours with single return points, and isolate capacitive loads with small series resistors. These steps reduce parasitics, prevent peaking, and preserve measured noise and distortion performance in real systems.

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