TPA135
Unidirectional, Current-Sense Amplifier with PWM Rejection
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Overview
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Development Resources
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Application
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Ordering Detail
Overview
The TPA135 is a unidirectional current-sense amplifier which has a very wide input common-mode voltage range from −4 V to 80 V with a high bandwidth of 1 MHz. The enhanced PWM rejection allows the TPA135 to accommodate the solenoids and motors applications. The device features high precision accuracy specifications of Vos and the gain error, which makes it ideal for small signal conditioning. Its high bandwidth makes it ideal not only for DC current measurement, but also for high-speed applications like fast overcurrent protection.
Fixed gains are optional: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The device offers breakthrough performance throughout the temperature range of −40°C to +125°C. The device is offered SOT23-5 package.
Many systems, including motors and solenoids, employ PWM signals for modulation or control purposes. However, these PWM signals generate fast common-mode voltage transitions that oscillate between high voltage and ground potential. This can pose a challenge for the current measurement circuitry, as it may result in undesirable output voltage fluctuations. To address this issue, the device incorporates an advanced PWM rejection feature. This feature minimizes the impact of common-mode voltage transitions and ensures stable and reliable output voltage.
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Status
Production
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Rating
Industrial
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Features
80V Vcm, Uni-directional, Current-Sense Amplifier with PWM Rejection
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VCM Min
-4
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VCM Max
80
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Vos drift Typ (μV/c)
0.15
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Input Direction
Uni-dir
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CMRR (Min) (dB)
128
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BW (kHz)
1000 at G=20, 50, 100, 200; 500 at G=500;
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Gain Option
G = 20, 50, 100, 200, 500
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GE Max at full temp range (%)
±0.35
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GE Drift, max (ppm/c)
12
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Vos max (μV)
±140
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Ib (Typ) (nA)
1000
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PWM Rejection
YES
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VS Min
3
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VS Max
5.5
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Iq (Max) (μA)
4000
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Number of Channels
1
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Comparator
0
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Package
SOT23-5
Development Resources
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Documentation
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Show FilterHidden FilterDocumentation
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Data Sheet
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Selection Guide
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Application Note
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Technical Note
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User Guide
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Test Report
- Document Name
- Type
- Language
- Date
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Data SheetEnglish04/23/2025
Unidirectional, Current-Sense Amplifier with PWM Rejection
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Technical NoteEnglish01/19/2024
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Technical NoteEnglish01/19/2024
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Selection GuideEnglish01/19/2024
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Application
• Current Sensing (High-Side and Low-Side)
• Power Management
• Solenoid and Valve Control
• Motor Control
Ordering Detail
| Order Part Number | Buy | Samples | Rating | Feature | Status | 1ku Price | Release Date | Package | Lead time (week) | MSL | Packing | MPQ | CPQ |
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| TPA135B4-S5TR-S | Industrial Grade | / | Production | / | 2024-12-13 | SOT23-5 | 24 | MSL3 | T&R | 3000 | 120000 | ||
| TPA135A3-S5TR-S | Industrial Grade | / | Production | / | 2024-12-13 | SOT23-5 | 17 | MSL3 | T&R | 3000 | 120000 | ||
| TPA135B3-S5TR-S | Industrial Grade | / | Production | / | 2025-01-14 | SOT23-5 | 17 | MSL3 | T&R | 3000 | 120000 | ||
| TPA135A4-S5TR-S | Industrial Grade | / | Production | / | 2024-12-13 | SOT23-5 | 24 | MSL3 | T&R | 3000 | 120000 | ||
| TPA135B2-S5TR-S | Industrial Grade | / | Production | / | 2024-12-13 | SOT23-5 | 24 | MSL3 | T&R | 3000 | 120000 | ||
| TPA135A2-S5TR-S | Industrial Grade | / | Production | / | 2024-12-13 | SOT23-5 | 17 | MSL3 | T&R | 3000 | 120000 |
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