TPA191
Zero-Drift, Bi-Directional Current Sense Amplifier
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Overview
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Development Resources
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Application
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Ordering Detail
Overview
The TPA191 is a series of zero-drift, bi-directional current sense amplifiers that can sense voltage drops across shunts at common-mode voltages from −0.3 V to 36 V, independent of the supply voltage. Five fixed gains are available: 20 V/V, 50 V/V, 75 V/V, 100 V/V, and 200 V/V. The integration-matched gain resistor network minimizes gain errors and reduces the temperature drift. The low offset of the zero-drift architecture enables current sensing with the maximum drops across the shunt as low as 10 mV full-scale.
The TPA191 series operates from a single 2.7-V to 36-V power supply, while drawing 80-μA supply current (typical). All versions are specified from −40°C 125°C, and offered in the SOT363 (SC70-6) package.
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Status
Production
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Rating
Industrial
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Feature
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VCM Min
-0.3
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VCM Max
36
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Vos drift Typ (μV/c)
0.2
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Input Direction
Bi-dir
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CMRR Min (dB)
95
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BW (kHz)
150 at G=20;80 at G=50;50 at G=75;30 at G=100;15 at G=200
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Gain Option
G = 50, 100, 200
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GE Max at full temp range (%)
1
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GE Drift, max (ppm/c)
10
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Vos max (μV)
50
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Ib Typ (nA)
22000
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PWM Rejection
NO
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VS Min
2.7
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VS Max
36
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Iq Max (μA)
115
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Channel
1
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Comparator
0
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Package
SOT363
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 SheetEnglish03/26/2024
Zero-Drift, Bi-Directional Current Sense Amplifier
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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/Low-Side)
• Battery Charger
• Power Management
• Cell Phone Charger
• Electrical Cigarette
• Wireless Charger
• Telecom Equipment
Ordering Detail
| Order Part Number | Buy | Samples | Rating | Feature | Status | 1ku Price | Release Date | Package | Lead time (week) | MSL | Packing | MPQ | CPQ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TPA191A2-SC6R | Industrial Grade | / | Production | $0.357 | 2023-06-19 | SOT363 | 10 | MSL1 | T&R | 3000 | 120000 | ||
| TPA191A4-SC6R | Industrial Grade | / | Production | $0.335 | 2023-08-15 | SOT363 | 10 | MSL1 | T&R | 3000 | 120000 | ||
| TPA191A5-SC6R | Industrial Grade | / | Production | $0.335 | 2023-08-15 | SOT363 | 10 | MSL1 | T&R | 3000 | 120000 | ||
| TPA191A3-SC6R | Industrial Grade | / | Production | / | 2024-11-19 | SOT363 | 24 | MSL1 | T&R | 3000 | 120000 | ||
| TPA191A7-SC6R | Industrial Grade | / | Production | / | 2024-11-25 | SOT363 | 24 | MSL1 | T&R | 3000 | 120000 |
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