TCA505BG - 40V Inductive Proximity Switch IC | Infineon
N.º de pieza: TCA505BG ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.45 | $2,45 |
| 10 | $2.18 | $21,80 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.4 | $1.400,00 |
TCA505BG Descripción general
An inductive proximity switch is a non-contact position sensor widely used in industrial automation, where an LC tank oscillation is damped when a metallic target approaches the sensing coil. The TCA505BG replaces the discrete oscillator/detector/threshold chain with a single analog mixed-signal IC, easing EMC immunity design and reducing board area in 3-wire (PNP or NPN) and 2-wire sensor heads. As a Proximity Detector IC with analog input and analog output, the part belongs to the broader sensor interface IC category (sensor conditioning -> sensor interface IC -> mixed-signal IC -> semiconductor).
Key features include short-circuit and overload protection of both output stages and the external load, a 40 V maximum supply rating with reverse polarity tolerance of -40 V on the supply pin, an integrated 5 kHz oscillator, and a response frequency up to 5 kHz. The output stage can be configured for PNP (source), NPN (sink), or tri-state switching via a single MODE pin, eliminating the need for separate catalog variants. Operating temperature covers the harsh industrial range of -40 C to +110 C, suiting outdoor panel mounting, mobile hydraulics, and conveyor controls.
The IC uses a bipolar process with on-chip temperature compensation and watchdog blocks that continuously monitor the supply rail and output current. Threshold hysteresis is fixed internally, removing the typical external RC network and improving switching repeatability across the operating temperature range.
Typical applications include 3-wire PNP/NPN inductive proximity sensors in factory automation, machine tool position feedback, automotive sensor modules, and conveyor/object detection on 24 V industrial power buses. It is also used in harsh-environment limit switches where integrated short-circuit and reverse-polarity protection reduce warranty returns.
Designers should add a free-wheeling protection diode to the output when driving inductive loads, route the LC coil as a tight differential pair to the OSC pins, and place the supply bypass capacitor within 5 mm of VCC. Compared to earlier Siemens/Infineon proximity ICs, the TCA505BG removes the external trim resistors and adds active short-circuit protection.
This page consolidates distributor pricing, drop-in alternative parts, parametric comparison, and design notes not collected in the manufacturer datasheet, accelerating BOM selection for industrial proximity-sensor designs.
Alternativas directas para TCA505BG — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TCA505BG (mismo factor de forma y huella) — difiere en Package, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TCA505BGGEGXUMA1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TCA505B
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TCA505BG Valores máximos y características eléctricas
| Product Type | Proximity Detector IC / Inductive Proximity Switch IC |
| Manufacturer | Infineon Technologies (formerly Siemens Semiconductor) |
| Input Type | Analog (LC oscillator input) |
| Tipo de salida | Analog (push-pull / push-pull tri-state output stage) |
| Supply Voltage (VCC) | 3.1 V to 40 V (operating range 4 V to 40 V) |
| Reverse Polarity Voltage | -40 V (on VCC pin) |
| Supply Current (Quiescent) | < 0.8 mA |
| Operating Supply Current (typical) | 550 uA |
| Output Sink/Source Current | 60 mA (integrated output stage) |
| Oscillator Frequency | 5 kHz (typical) |
| Response Frequency | Up to 5 kHz |
| Temperatura de funcionamiento | -40 C to +110 C |
| Encapsulado | PG-DSO-16-1 / SOIC-16 (3.90 mm body width) |
| Tipo de montaje | Surface Mount |
| Protection Features | Short-circuit and overload protection for output stage and external load |
| Output Modes | PNP (source), NPN (sink), Tri-state (selectable) |
| Estado RoHS | Compliant |
Configuración de pines de TCA505BG
| Pin 1 | OSC1 — LC oscillator tank connection (to sensing coil) |
| Pin 2 | OSC2 — LC oscillator tank connection (to sensing coil) |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — Supply voltage (4 V to 40 V) |
| Pin 5 | TRIG — Threshold adjustment / detector output |
| Pin 6 | MODE — Output mode select (PNP / NPN / tri-state) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | Q_OUT — Output stage (push-pull, 60 mA) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Aplicaciones típicas
TCA505BG es adecuado para 7 aplicacións: 3-Wire PNP Inductive Proximity Sensor (Industrial 24 V), 3-Wire NPN Sinking Proximity Sensor, Machine Tool Position / End-of-Stroke Feedback, Automotive / Mobile Equipment Position Sensor, Conveyor and Material-Handling Object Detection, Proximity Switch Replacement (Maintenance / MRO), Industrial 24 V Limit Switch (Harsh Environment).
3-Wire PNP Inductive Proximity Sensor (Industrial 24 V)
The TCA505BG is the canonical front-end for 3-wire PNP inductive proximity sensors used on 24 V industrial PLCs. Its 4 V to 40 V supply range accepts the raw 24 V rail directly, while the integrated 60 mA source output drives the PLC optocoupler input and an on-board status LED without external transistors. Built-in short-circuit and overload protection shut the output stage down during wiring faults, eliminating the PTC fuse typical in discrete designs. The 5 kHz oscillator supports detection of fast-moving targets on conveyor lines, and the -40 C to +110 C window covers outdoor and wash-down environments.
Recomendado
3-Wire NPN Sinking Proximity Sensor
Reconfiguring the TCA505BG output stage to NPN (sinking) mode via the MODE pin yields a 3-wire NPN proximity sensor with the same silicon. The IC pulls the load to ground through 60 mA of sink current, suiting Japanese-style NPN PLC modules and legacy control wiring. Reverse-polarity protection up to -40 V on VCC protects against the NPN-vs-PNP wiring mistakes common in field service. The package-pin-compatible TCA505BCHIPX1SA1 die variant is used when sensor heads are built as potted hybrid modules rather than SMT assemblies.
Recomendado
Machine Tool Position / End-of-Stroke Feedback
On CNC milling machines and packaging equipment, the TCA505BG drives inductive limit switches that detect end-of-stroke on pneumatic cylinders and tool-changer arms. Its 5 kHz oscillator and fast response reliably track a target moving at high speed, while the wide -40 C to +110 C spec covers the elevated temperatures inside an unsealed control cabinet. Short-circuit protection is a must because the sensor is often wired to long cable harnesses that see physical abuse in industrial settings. The IC's watchdog timer blocks false triggers from line noise and motor back-EMF on adjacent cabling.
Recomendado
Automotive / Mobile Equipment Position Sensor
Mobile hydraulics, off-highway construction machinery, and agricultural vehicles use inductive proximity sensors to detect hydraulic-cylinder end-of-stroke and gear-position status. The TCA505BG's reverse-polarity tolerance of -40 V on VCC and 4 V to 40 V operating range suit 12 V and 24 V vehicle electrical systems with load-dump transients. Built-in short-circuit protection prevents the battery-direct sensor harness from drawing fault current through the cab. The wide temperature range handles engine-bay mounting and under-chassis exposure to road salt and spray.
Recomendado
Conveyor and Material-Handling Object Detection
Logistics conveyors use banked arrays of inductive proximity sensors to detect the position of totes, pallets, and metal objects at high speed. The TCA505BG's 5 kHz response frequency supports detection of objects moving at several meters per second, while the low 0.8 mA quiescent current keeps standby dissipation minimal across hundreds of sensors on a long line. The integrated output stage drives a multi-drop PLC digital input directly, eliminating a slave relay per station. Reverse-polarity protection prevents installation damage when cabling is rolled out by subcontractors.
Recomendado
Proximity Switch Replacement (Maintenance / MRO)
When an installed inductive proximity switch fails in the field, replacement electronics with the same supply range and output stage dramatically reduce wiring rework. The TCA505BG sits in a 16-pin SOIC and is a drop-in upgrade for legacy discrete proximity-switch frontend boards, providing integrated oscillator, demodulator, threshold, and 60 mA driver in one IC. The same Infineon TCA505BGGEGXUMA1 ordering code in cut-tape format is suitable for low-volume MRO repairs. Reverse-polarity and short-circuit protection reduce repeat-failure rates common with discrete alternatives.
Recomendado
Industrial 24 V Limit Switch (Harsh Environment)
The TCA505BG is well suited to harsh-environment industrial limit switches mounted outdoors (mining, oil & gas, water-treatment plants). Its -40 C to +110 C operating range covers winter freeze to summer solar loading, and the SOIC-16 surface-mount package survives potting compounds used to seal against moisture ingress. The 60 mA output stage directly sources the load without external pass transistors that would otherwise compromise long-term reliability. The internal watchdog blocks false trips from adjacent VFD cabling and welding-machine EMI.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TCA505BG — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TCA505BGGEGXUMA1 | TCA505BCHIPX1SA1 | TCA505B |
|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon |
| Package | SOIC-16 (PG-DSO-16-1) | SOIC-16 (PG-DSO-16-1) - same | Bare die (different package form) | SOIC-16 / die (multi) |
| Supply Voltage (VCC) | 4 V to 40 V | 4 V to 40 V | 4 V to 40 V | 4 V to 40 V |
| Quiescent Current | < 0.8 mA | < 0.8 mA | < 0.8 mA | < 0.8 mA |
| Output Sink/Source Current | 60 mA | 60 mA | 60 mA | 60 mA |
| Oscillator Frequency | 5 kHz | 5 kHz | 5 kHz | 5 kHz |
| Operating Temperature | -40 C to +110 C | -40 C to +110 C | -40 C to +110 C | -40 C to +110 C |
| Reverse Polarity Tolerance | -40 V | -40 V | -40 V | -40 V |
| Output Mode Configuration | PNP / NPN / tri-state | PNP / NPN / tri-state | PNP / NPN / tri-state | PNP / NPN / tri-state |
| Ordering Code Suffix | BG (standard tray) | GGEGXUMA1 (tape and reel, RoHS-compliant) | CHIPX1SA1 (bare die) | Family designation (no suffix) |
Diferenciadores clave
- Integrated 60 mA output stage eliminates external driver transistor (frente a TCA505BGGEGXUMA1)
- Wide -40 V reverse polarity tolerance on VCC (frente a TCA505BCHIPX1SA1)
- Selectable PNP/NPN/tri-state output on a single part number (frente a TCA505B)
Notas de diseño
Place the LC oscillator tank as close as possible to OSC1 and OSC2 (pins 1-2) and keep the tank traces short, symmetric, and shielded from digital returns - the oscillator is sensitive to ground loops above a few hundred uA. Per the Infineon datasheet, the VCC decoupling capacitor should be a 100 nF X7R ceramic placed within 5 mm of the VCC pin (4) and a parallel 10 uF tantalum or aluminum-polymer bulk cap covering 24 V industrial transients. Add a TVS diode (e.g. 36 V SMAJ) and a series PTC on VCC for automotive load-dump compliance above 24 V installations.
Do not connect a relay coil directly to Q_OUT (pin 9) without a free-wheeling diode - even though the IC has short-circuit protection, the inductive kickback can exceed the absolute maximum ratings during turn-off. Use an external 1 A schottky or fast-recovery diode across the relay coil, or place a TVS across Q_OUT and ground. The MODE pin must be tied to VCC, GND, or left open per the datasheet for stable tri-state, PNP, or NPN operation - never float the MODE pin in production. When the application requires reverse-polarity protection above -40 V, add an external series MOSFET with a gate-protection Zener.
The TCA505BG's detection threshold depends on the Q-factor of the LC tank; variations in coil temperature coefficient and humidity drift the trigger point over time per the legacy Siemens datasheet. For precision position feedback, characterize the LC tank over the full -40 C to +110 C range and select a coil with low-TC inductance. The 5 kHz oscillator produces harmonics that may couple into adjacent cable harnesses; route the sensor cable along a grounded shield and place a 1 nF bypass from VCC to GND right at the cable gland. Watchdog-blocks on the IC filter short bursts but not sustained EMI - external filtering is mandatory in VFD-rich environments.
Información de cumplimiento
RoHS compliant per Infineon product page (GGEGXUMA1 suffix confirms lead-free tape-and-reel). Not AEC-Q100 qualified - use the broader automotive-qualified proximity-switch portfolio where automotive grade is required. Conflict-mineral status compliant via Infineon's standard CMRT/CRT filing.
