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Analog Devices Inc. LT6100HDD#PBF
- Part No.:
- LT6100HDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6100HDD#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:222
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Product details
Overview
LT6100HDD#PBF from Analog Devices (formerly Linear Technology) is a precision, micropower, high-side current sense amplifier with pin-selectable gain (10–50 V/V), 4.1V to 48V input common-mode range, ±300 µV max input offset, and 0.5% gain accuracy. It monitors unidirectional load currents via an external sense resistor in battery protection, fuse monitoring, and industrial power systems.
For engineers reviewing the LT6100HDD#PBF datasheet, LT6100HDD#PBF pinout, LT6100HDD#PBF application, or LT6100HDD#PBF equivalent, key selection criteria include its –40°C to 125°C operating temperature grade, 8-lead DFN package, reverse-battery tolerance to –48V, 60 µA supply current, and buffered output with noise filtering capability.
Technical Context
The LT6100HDD#PBF employs an Over-The-Top® input topology enabling operation with VS+ up to 48V while powered from a separate 2.7V–36V VCC rail. Its two-stage architecture first level-shifts and amplifies the sense voltage (VSENSE = VS+ – VS–) with fixed 10 V/V gain, then applies programmable op-amp gain (G2 = 1–5) for total gains of 10–50 V/V.
Gain selection is implemented via strapping A2 (Pin 6) and A4 (Pin 7) to VEE or leaving them open, with no external resistors required. The FIL pin provides a dedicated low-pass filter node (f–3dB = 1/(2π × 60 kΩ × C)) for rejecting high-frequency noise on the sense signal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common-Mode Range | 4.1V to 48V - enables direct monitoring of high-side MOSFETs, fuses, or battery inputs without level-shifting circuitry. |
| Gain Accuracy | ±0.5% - ensures current measurement error remains below 0.5% across all six selectable gains (10/12.5/20/25/40/50 V/V). |
| Input Offset Voltage | ±350 µV (max, DD package, –40°C to 125°C) - supports accurate low-current sensing down to ~1 mA with 100 mΩ sense resistor. |
| Supply Current | 60 µA (typ) - allows continuous current monitoring in always-on battery-powered systems with minimal drain. |
| Reverse Battery Protection | Withstands –48V on VS+/VS– - eliminates need for external blocking diodes in automotive or backup battery applications. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial motor control, and high-reliability embedded systems. |
| Power-Down Input Leakage | 1 nA (max) when VCC = 0V - prevents loading of monitored circuit during system sleep or brownout conditions. |
Pinout & Package
LT6100HDD#PBF is housed in an 8-lead (3 mm × 3 mm) plastic DFN package with exposed thermal pad (Pin 9, connected to VEE). The package supports high-density PCB layouts and efficient heat dissipation in space-constrained power management modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS– (Pin 1) | Negative Sense Input | Connects to low side of sense resistor; withstands up to 48V common-mode; internal 5 kΩ gain-setting resistor. |
| VCC (Pin 2) | Supply Input | Powers both sense amplifier and output op-amp; operates from 2.7V to 36V; draws only 60 µA. |
| FIL (Pin 3) | Noise Filter Node | Internal connection to 60 kΩ RC network; adding capacitor sets single-pole low-pass cutoff (e.g., 220 pF → 12 kHz). |
| VEE (Pin 4) | Negative Supply / Ground | Reference for output stage and FIL pin; exposed pad must be soldered to PCB ground plane for thermal and electrical performance. |
| VOUT (Pin 5) | Buffered Output | Amplified, level-shifted representation of VSENSE × AV; drives capacitive loads up to 1000 pF without instability. |
| A2 (Pin 6) | Gain Select Input | Strapping to VEE or floating selects G2 = 1/1.25/2/2.5/4/5; combined with fixed 10× front-end yields total AV = 10–50 V/V. |
| A4 (Pin 7) | Gain Select Input | Second gain control pin; used with A2 per Table 1 to set final gain; no pull-up/down required. |
| VS+ (Pin 8) | Positive Sense Input | Connects to high side of sense resistor; withstands up to 48V common-mode; internal 5 kΩ gain-setting resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Over-The-Top® Input Architecture | Enables VS+ operation up to 48V independent of VCC, eliminating need for charge pumps or isolated supplies in high-side sensing. |
| Pin-Selectable Gain | Six precise gains (10/12.5/20/25/40/50 V/V) set by strapping two pins-no external components or trimming required. |
| Reverse-Battery Tolerance | Survives –48V applied to VS+/VS– terminals, protecting against accidental battery reversal in automotive and portable equipment. |
| Power-Down High-Impedance Inputs | When VCC = 0V, sense inputs draw ≤1 nA, allowing permanent connection to battery rails without parasitic drain. |
| Integrated Noise Filtering | Dedicated FIL pin simplifies EMI suppression with single external capacitor-critical for noisy switching power supply environments. |
Applications
| Battery Monitoring | Fuse Monitoring |
|---|---|
Use Scenario: Real-time monitoring of lithium-ion pack discharge current in portable medical devices. IC Role / Device Role / Timing Role: High-side current sense amplifier converting RSENSE voltage drop into proportional buffered analog output. Use Value: Enables accurate state-of-charge estimation and overcurrent shutdown at <1 mA resolution using 100 mΩ sense resistor and 50 V/V gain. | Use Scenario: Detecting open-circuit condition in automotive main fuse during engine cranking. IC Role / Device Role / Timing Role: High-voltage tolerant current monitor placed upstream of fuse to detect zero-current fault condition. Use Value: Withstands 48V common-mode and –48V reverse battery; outputs rail-to-rail signal indicating fuse integrity without external protection diodes. |
| Portable Test Equipment | Industrial Motor Control |
Use Scenario: Precision current sourcing in handheld multimeter calibration modules. IC Role / Device Role / Timing Role: Unidirectional current sense element feeding feedback loop of programmable current source. Use Value: 0.5% gain accuracy and ±350 µV offset ensure <0.1% full-scale current measurement error across –40°C to 125°C. | Use Scenario: Phase current monitoring in BLDC motor drives with 48V DC bus. IC Role / Device Role / Timing Role: High-side shunt amplifier interfacing to ADC input of motor control MCU. Use Value: 12 kHz noise filtering bandwidth (via FIL pin) suppresses PWM switching noise while preserving current ripple for torque control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | Fixed gain (20 V/V), lower offset (±25 µV), wider common-mode (–4 V to 80 V), but requires external VREF for bidirectional sensing. | Optimized for bidirectional current sensing in motor control; lacks pin-selectable gain flexibility. | Select when ultra-low offset and extended negative common-mode are critical, and fixed gain suffices. |
| MAX40056ATA+T | Fixed gain (50 V/V), higher bandwidth (1 MHz), integrated reference, but narrower temp range (–40°C to 125°C same, but not specified for extended life at 125°C). | Better suited for fast transient detection in power supply OCP; lacks programmable gain and reverse-battery rating. | Select when high-speed response and integrated reference simplify design, and reverse-battery protection is not required. |
Compared with INA240A1IDR and MAX40056ATA+T, LT6100HDD#PBF uniquely combines pin-selectable gain, –48V reverse-battery tolerance, and guaranteed 125°C operation in a compact DFN-making it optimal for ruggedized, multi-range, high-voltage industrial monitoring where layout simplicity and fault resilience are prioritized.
Availability
LT6100HDD#PBF is available at Aetrix Electronics and suitable for battery management systems, industrial motor controllers, and automotive fuse monitoring requiring stable component supply across extended temperature ranges.
Supply support for LT6100HDD#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT6100 product line was designed specifically for precision, low-power, high-voltage high-side current sensing in safety-critical and thermally demanding applications such as automotive subsystems and industrial power conversion.
FAQ
What is the maximum common-mode voltage supported by LT6100HDD#PBF?
The LT6100HDD#PBF supports a differential sense voltage of ±48V and a total VS+, VS– to VEE voltage of 48V. Its input common-mode range extends from 4.1V to 48V, enabling direct monitoring of high-side nodes in 48V battery systems and industrial power rails without attenuation or isolation.
How does LT6100HDD#PBF achieve reverse-battery protection?
The LT6100HDD#PBF withstands –48V applied to its VS+ and VS– pins due to internal Over-The-Top® input circuitry and robust ESD protection. This eliminates the need for external series diodes in automotive or backup power applications, preserving measurement accuracy and reducing BOM cost and board area.
Can LT6100HDD#PBF operate with VCC disconnected while still connected to a live battery?
Yes. When VCC = 0V, the LT6100HDD#PBF's sense inputs draw ≤1 nA, maintaining high impedance and preventing parasitic loading of the battery. This feature enables "always-connected" monitoring in battery-backed systems without compromising standby current budget.
What is the purpose of the FIL pin on LT6100HDD#PBF?
The FIL pin on LT6100HDD#PBF connects internally to a 60 kΩ resistor network and allows implementation of a single-pole low-pass filter by adding an external capacitor. For example, a 220 pF capacitor sets f–3dB ≈ 12 kHz-ideal for suppressing switching noise in DC-DC converter current sensing applications.
Which gain options are available on LT6100HDD#PBF and how are they selected?
The LT6100HDD#PBF offers six precise gains: 10, 12.5, 20, 25, 40, and 50 V/V. Selection is achieved by strapping A2 (Pin 6) and A4 (Pin 7) to VEE or leaving them open per Table 1 in the datasheet-no external resistors or configuration registers are needed, simplifying hardware design and reducing component count.
LT6100HDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 150 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 80 µV
- Current - Supply:
- 60µA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT6100HDD#PBF FAQ
1.How can I place an order for LT6100HDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6100HDD#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT6100HDD#PBF reliable?
The price and inventory of LT6100HDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6100HDD#PBF is usually 5 days.
3.What payment methods are accepted for LT6100HDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6100HDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6100HDD#PBF?
LT6100HDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6100HDD#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT6100HDD#PBF?
For technical support, including LT6100HDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6100HDD#PBF requirements.
6.How does Aetrix verify that LT6100HDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT6100HDD#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT6100HDD#PBF meets industry standards.
7.What is the process for return or replacement of LT6100HDD#PBF?
All LT6100HDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6100HDD#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT6100HDD#PBF part is unused and in its original packaging.
Return procedure for LT6100HDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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