Overview
The TPS26610DDFR from Texas Instruments is a compact, feature-rich, fully integrated current loop protector. This device is designed to provide universal input protection for various current loop configurations, including ±20 mA, 0 mA to 20 mA, and 4 mA–20 mA. It is particularly suited for applications in analog inputs, analog outputs, sensor transmitters, HART inputs, and UART IO protection. The TPS26610DDFR operates within a wide voltage range, from ±2.25 V to ±20 V for bipolar supplies and from 3 V to 30 V for unipolar supplies, making it versatile for different power supply configurations. The device is packaged in a small 2.9-mm × 1.6-mm 8-pin SOT-23 package, significantly reducing system footprint.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage | ±2.25 | - | ±30 | V |
| Absolute Maximum Voltage | -55 | - | 55 | V |
| Current Limit | 25 | 32 | 40 | mA |
| Transient Pulse Over Current Limit | 50 | 60 | 72 | mA |
| RON (On Resistance) | 4.8 | 7.5 | 12.5 | Ω |
| IQ (Quiescent Current) | - | < 100 | - | nA |
| Thermal Shutdown | - | - | - | - |
| Junction-to-Ambient Thermal Resistance | - | - | 117.8 | °C/W |
Key Features
- ±50-V operating voltage, ±55-V absolute maximum
- Integrated fixed bipolar 32-mA current limit
- Allows 2x current limit at start-up
- Low RON: 7.5-Ω typical
- Low IQ (< 100 nA) – current drawn from loop when powered from external supply
- Protection against miswiring conditions on IN and OUT
- Protection during signal line surge IEC61000-4-5 (with external TVS)
- Criteria-A EFT (IEC61000-4-4) immunity (with external TVS)
- Supports loop testing without supply (TPS26610 only)
- HART compliant
- Enable control
- SGOOD for system health monitoring
- Thermal shutdown
Applications
- Factory automation and control – PLCs, analog input and output modules
- Motor drives control
- HART inputs
- HVAC controllers
- UART IO protection
- Thermal controllers
Q & A
- What is the operating voltage range of the TPS26610DDFR?
The TPS26610DDFR operates within a voltage range of ±2.25 V to ±20 V for bipolar supplies and from 3 V to 30 V for unipolar supplies.
- What is the typical on-resistance (RON) of the TPS26610DDFR?
The typical on-resistance (RON) is 7.5 Ω.
- Does the TPS26610DDFR support loop testing without an external supply?
- What kind of protection does the TPS26610DDFR offer against signal line surges?
The TPS26610DDFR offers protection against signal line surges according to IEC61000-4-5 with an external TVS.
- Is the TPS26610DDFR HART compliant?
- What is the purpose of the SGOOD pin on the TPS26610DDFR?
The SGOOD pin serves as a signal good indicator for system health monitoring and can also drive an external LED for visual indication.
- What is the thermal shutdown feature of the TPS26610DDFR?
The device includes thermal shutdown to protect against overheating conditions.
- What are the typical applications of the TPS26610DDFR?
Typical applications include factory automation, motor drives control, HART inputs, HVAC controllers, UART IO protection, and thermal controllers.
- What is the package type and size of the TPS26610DDFR?
The device is packaged in a 2.9-mm × 1.6-mm 8-pin SOT-23 package.
- Does the TPS26610DDFR have an enable control feature?
