TPA133
Bidirectional, 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 TPA133 is a current-sense amplifier with a very wide input common-mode voltage range from −4 V to 95 V with a small-signal bandwidth of 1 MHz. The enhanced PWM rejection allows the TPA133 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 the small signal conditioning interfacing with a high-accuracy ADC.
Fixed gains are optional: 10 V/V, 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 SOT23-8 and MSOP8 packages.
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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Feature
95V Vcm, Bidirectional, Current-Sense Amplifier with PWM Rejection
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VCM Min
-4
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VCM Max
95
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Vos drift Typ (μV/c)
0.15
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Input Direction
Bi-dir
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CMRR Min (dB)
130
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BW (kHz)
1000 at G=10, 20, 50, 100, 200; 500 at G=500;
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Gain Option
G = 10, 20, 50, 100, 200, 500
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GE Max at full temp range (%)
±0.3
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GE Drift, max (ppm/c)
12
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Vos max (μV)
120
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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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Channel
1
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Comparator
0
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Package
MSOP8
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 SheetEnglish03/05/2025
Bidirectional, 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)
• Solenoid and Valve Control
• Power Management
Ordering Detail
| Order Part Number | Buy | Samples | Rating | Feature | Status | 1ku Price | Release Date | Package | Lead time (week) | MSL | Packing | MPQ | CPQ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TPA133A0-VS1R-S | Industrial Grade | / | Production | / | 2025-03-08 | MSOP8 | 24 | MSL1 | T&R | 3000 | 15000 |
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