The TP1561AL1-TR presents a compact, data-first profile: typical 6 MHz gain-bandwidth, ~4.5 V/µs slew rate, and ~600 µA quiescent current per channel with RRIO behavior and low offset, making it relevant for low-power single-supply designs.
| Parameter | Typical Value | Conditions |
|---|---|---|
| Gain Bandwidth (GBW) | 6 MHz | CL = 20 pF, RL = 10 kΩ |
| Slew Rate | 4.5 V/µs | G = 1, 2V Step |
| Quiescent Current | 600 µA | Per Channel, No Load |
| Supply Voltage Range | 1.8V – 5.5V | Single Supply |
| Input/Output Type | Rail-to-Rail | RRIO Architecture |
1 — Background & Key Features
Overview: device class, topology, and intended use
The TP1561AL1-TR is a single-channel CMOS rail-to-rail input/output amplifier optimized for portable and sensor front-ends. Its RRIO architecture enables operation on single low-voltage rails without negative supplies, simplifying designs. Typical use cases include battery-powered instrumentation and buffer stages.
2 — Performance Data Deep‑Dive
Frequency response & bandwidth behavior
Typical gain‑bandwidth of 6 MHz implies usable closed‑loop bandwidth of roughly GBW/closed‑loop gain. Small‑signal response follows advertised GBW while large‑signal response is limited by the ~4.5 V/µs slew rate. Measurements should be verified at VCC = 5 V and RL = 10 kΩ.
3 — Power & Thermal Considerations
Quiescent current & battery life
With ~600 µA quiescent current, a single‑channel device draws minimal power. Example: 3.3 V × 0.6 mA ≈ 2.0 mW. For a 1000 mAh cell, theoretical idle life is ~1667 hours. Always include system switching overhead in real estimates.
4 — Typical Application Circuits
Unity‑gain buffer
A unity‑gain follower demonstrates RRIO advantage: a single 3.3 V supply can directly buffer sensor outputs without negative rails. Measure step settling to 0.1% and note any output headroom limitations near rails.
5 — Design Checklist
- Verify GBW vs Closed-loop gain requirements.
- Confirm RRIO necessity for the signal chain.
- Bypass capacitors (0.1 µF + 1 µF) placed near V+ pins.
- Add 10–50 Ω series resistor for capacitive loads.
6 — FAQ
What supply voltages work with the TP1561AL1-TR and how do they affect specs?
Typical operation spans common single‑supply voltages (1.8–5.5 V). Higher supply increases available output swing and can slightly improve GBW and slew, while lower supply reduces headroom.
How should I measure the TP1561AL1-TR offset and noise accurately?
Use a low‑noise shielded test jig with short input wiring and supply decoupling. For noise, use a defined bandwidth (e.g., 0.1 Hz–10 kHz) and appropriate filtering to match application conditions.
Is TP1561AL1-TR suitable for driving capacitive loads directly?
Driving large capacitive loads can challenge stability; add a small series resistor (10–50 Ω) at the output to preserve stability and minimize overshoot during prototype testing.
What are the common package options for TP1561AL1-TR?
The TP1561AL1-TR typically comes in compact SOT-23 or similar small-outline surface mount packages for high-density PCB designs, favoring portable electronics.
