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Analog Devices Inc. LT6100CDD#PBF
- Part No.:
- LT6100CDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6100CDD#PBF.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,754
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Product details
Overview
LT6100CDD#PBF from Analog Devices (formerly Linear Technology) is a precision, micropower, gain-selectable high-side current sense amplifier designed for unidirectional current monitoring via an external sense resistor. It delivers 0.5% gain accuracy across six pin-selectable gains (10–50V/V), supports 4.1V–48V input common-mode voltage, and operates from a 2.7V–36V VCC supply while drawing only 60µA. It is used in battery monitoring, fuse monitoring, and portable power systems where low offset (±350µV max), high CMRR (>105dB), and reverse-battery protection (–48V) are critical.
For engineers reviewing the LT6100CDD#PBF datasheet, LT6100CDD#PBF pinout, LT6100CDD#PBF application, or LT6100CDD#PBF equivalent, key selection criteria include its 8-lead DFN package, C-grade temperature range (0°C to 70°C), differential sense input tolerance up to ±48V, buffered output with 15mV minimum swing, and FIL pin for configurable noise filtering - all essential for robust high-side sensing in space-constrained industrial and portable designs.
Technical Context
The LT6100CDD#PBF employs an Over-The-Top® input topology enabling operation with VS+ as low as 4.1V (1.4V above VCC) and up to 48V, independent of VCC. Its two-stage architecture first level-shifts and amplifies the sense voltage (VSENSE = VS+ – VS–) with fixed 10V/V gain, then applies programmable op-amp gain (G2 = 1–5×) via A2/A4 pins to achieve total gains of 10–50V/V.
It features separate VCC and VEE supplies, allowing ground-referenced output even when sensing high common-mode voltages. The FIL pin connects internally to a 60kΩ network, enabling single-capacitor low-pass filtering (e.g., 220pF → 12kHz rolloff), and the device maintains <1µA input current when VCC is powered down - critical for always-connected battery monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Accuracy | ±0.5% max over full temperature range - ensures precise current measurement without calibration in production. |
| Input Offset Voltage | ±350µV max (DD package, 0°C–70°C) - enables accurate detection of sub-mA currents with typical 10mΩ–100mΩ sense resistors. |
| Sense Input Range | VS+ and VS– tolerate 4.1V to 48V common-mode - allows direct monitoring of 12V/24V/48V bus rails and MOSFET/fuse voltage drops. |
| VCC Supply Range | 2.7V to 36V - supports wide-input power supplies and enables operation from single Li-ion or multi-cell battery stacks. |
| Quiescent Current | 60µA typical - minimizes system standby power loss in battery-powered applications like portable test equipment. |
| CMRR / PSRR | >105dB - rejects noise from noisy DC-DC converters and high-voltage transients in automotive or industrial environments. |
| Operating Temp | 0°C to 70°C (C-grade) - qualified for commercial and industrial control applications with moderate thermal profiles. |
Pinout & Package
The LT6100CDD#PBF is housed in an 8-lead (3mm × 3mm) plastic DFN package with exposed pad (Pin 9) soldered to PCB for thermal and electrical grounding to VEE. Pin 1 is marked by top-side dot; exposed pad must be connected to VEE for proper operation and thermal performance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS– (Pin 1) | Negative sense input | Connects to low side of sense resistor; withstands up to 48V and reverse battery (–48V); internal 5kΩ gain-setting resistor. |
| VCC (Pin 2) | Positive supply input | Powers both sense amplifier and output op-amp; 2.7V–36V range; draws only 60µA quiescent current. |
| FIL (Pin 3) | Noise filter node | Internal connection to 60kΩ network; adding capacitor to VEE sets single-pole low-pass cutoff (e.g., 220pF → 12kHz). |
| VEE (Pin 4) | Negative supply / ground | Reference for output and internal circuitry; exposed pad (Pin 9) is electrically tied to VEE and must be soldered. |
| VOUT (Pin 5) | Buffered output | Amplified, level-shifted representation of VSENSE; swings 15mV above VEE to within 75mV of VCC; drives ≥1000pF loads. |
| A2 (Pin 6) | Gain select input | Strap to VEE or leave open to set G2 = 1.25×, 2×, or 1×; combined with A4 determines total gain (10–50V/V). |
| A4 (Pin 7) | Gain select input | Strap to VEE or leave open to set G2 = 4× or 5×; pairing with A2 selects one of six discrete gains per Table 1. |
| VS+ (Pin 8) | Positive sense input | Connects to high side of sense resistor; withstands 4.1V–48V; internal 5kΩ gain-setting resistor; reverse-battery tolerant. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable gain | Six precise gains (10/12.5/20/25/40/50V/V) set by strapping A2/A4 to VEE or leaving open - eliminates external gain resistors and layout complexity. |
| Reverse battery protection | Withstands –48V on VS+/VS– inputs with VCC unpowered - enables safe integration into automotive and battery-backed systems. |
| Power-down input impedance | <1µA total sense input current when VCC = 0V - prevents loading of monitored circuit during sleep or fault conditions. |
| High common-mode rejection | >105dB CMRR across 4.1V–36V VS range - maintains accuracy despite ripple or noise on high-voltage rails. |
| Low-offset Kelvin-compatible design | ±350µV max offset + dedicated VS+/VS– pins - supports 4-wire Kelvin connections to minimize PCB trace resistance errors in high-current sensing. |
Applications
| Battery Monitoring | Fuse Monitoring |
|---|---|
Use Scenario: Real-time monitoring of charge/discharge current in Li-ion battery packs for portable medical devices. IC Role / Device Role / Timing Role: High-side current sense amplifier converting mV-level RSENSE voltage into buffered, ground-referenced analog output proportional to load current. Use Value: Enables accurate state-of-charge estimation and overcurrent protection with ±0.5% gain accuracy and 60µA quiescent current preserving battery life. | Use Scenario: Detecting open-circuit failure of a 48V telecom fuse in active power distribution units. IC Role / Device Role / Timing Role: High-side monitor measuring voltage drop across fuse; outputs rail-to-rail signal indicating continuity or blow condition. Use Value: Tolerates 48V common-mode and –48V reverse-battery events; maintains functionality during fuse collapse (VS– → 0V) without phase inversion or damage. |
| Portable Test Equipment | Micro-Hotplate Control |
Use Scenario: Precision current sourcing and measurement in handheld multimeters and calibrators. IC Role / Device Role / Timing Role: Unidirectional current sensor providing stable, low-drift output for DAC-controlled current loops. Use Value: 0.5% gain accuracy and ±350µV offset enable sub-100µA resolution with 100mΩ sense resistors; FIL pin suppresses switching noise from internal DC-DC converters. | Use Scenario: Simultaneous voltage and current feedback for closed-loop temperature control of MEMS micro-hotplates (e.g., Boston Microsystems MHP100S). IC Role / Device Role / Timing Role: High-side current monitor paired with voltage monitor IC to deliver real-time power dissipation data for thermal regulation. Use Value: 12kHz bandwidth (with 220pF FIL cap) matches thermal response time; 8-lead DFN footprint saves board space in miniaturized sensor modules. |
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 20V/V gain; 2.7V–5.5V VCC only; 800kHz bandwidth; no FIL pin; ±5µV offset (typ) | Optimized for low-voltage, high-speed motor control; lacks reverse-battery tolerance and wide-VS support | Select for cost-sensitive, low-VCC (<5.5V) designs requiring higher bandwidth and lower offset - not suitable for 48V or reverse-battery use cases. |
| MAX4080TASA+ | Fixed 20V/V gain; 4.5V–76V VS range; 2.7V–5.5V VCC; 250kHz bandwidth; no gain selection | Supports higher VS (76V) but narrower VCC range; no programmable gain or FIL filtering | Choose when monitoring >48V rails (e.g., industrial 60V systems) and fixed gain suffices; avoid if gain flexibility or noise filtering is required. |
Compared with INA240A1IDR and MAX4080TASA+, the LT6100CDD#PBF uniquely combines pin-selectable gain, 48V reverse-battery protection, FIL-based noise filtering, and 2.7V–36V VCC operation - making it optimal for versatile, rugged, and space-constrained high-side sensing where adaptability and fault resilience are mandatory.
Availability
LT6100CDD#PBF is available at Aetrix Electronics and suitable for battery monitoring, fuse monitoring, and portable test equipment requiring stable component supply, long-term lifecycle support, and guaranteed C-grade (0°C to 70°C) performance.
Supply support for LT6100CDD#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 for precision instrumentation, power management, and industrial systems.
The LT6100 product line was designed specifically for high-accuracy, low-power, high-common-mode high-side current sensing in battery-powered, automotive, and industrial applications - emphasizing robustness, ease of use, and minimal external components.
FAQ
What is the maximum common-mode voltage the LT6100CDD#PBF can handle on its sense inputs?
The LT6100CDD#PBF supports a sense input common-mode voltage range of 4.1V to 48V on VS+ and VS–, and can withstand a differential sense voltage of ±48V. It also survives reverse battery conditions down to –48V when VCC is unpowered - a key feature for automotive and backup power systems where polarity reversal may occur.
How do I configure the LT6100CDD#PBF for a gain of 25V/V?
To configure the LT6100CDD#PBF for 25V/V gain, connect Pin 6 (A2) to VEE and leave Pin 7 (A4) open. This sets G2 = 2.5×, resulting in total gain AV = 10 × 2.5 = 25V/V. The gain configuration is defined in Table 1 of the datasheet and requires no external resistors - only simple strap connections or NC routing.
Does the LT6100CDD#PBF require external filtering, and how is the FIL pin used?
Yes - the FIL pin enables optional external RC filtering to suppress high-frequency noise. Connect a capacitor from FIL to VEE to form a single-pole low-pass filter with f–3dB = 1/(2π × 60kΩ × C). For example, a 220pF capacitor yields ~12kHz rolloff - ideal for attenuating switching noise from DC-DC converters while preserving step response for current fault detection in the LT6100CDD#PBF.
What is the output voltage swing capability of the LT6100CDD#PBF?
The LT6100CDD#PBF output (VOUT) swings from a minimum of 15mV above VEE (no load) to within 75mV of VCC under light load. At IL = 1mA, VO(MAX) degrades to ~400mV below VCC. This rail-to-rail capable output remains accurate and stable driving capacitive loads up to 1000pF - supporting direct interface with ADCs or comparator inputs without buffering.
Can the LT6100CDD#PBF remain connected to a battery when powered down?
Yes - the LT6100CDD#PBF uses Linear's Over-The-Top® input architecture, allowing its VS+ and VS– inputs to remain high-impedance (<1µA total current) even when VCC = 0V. This enables "always-connected" battery monitoring in sleep modes or fault states without loading the battery or distorting measurements - a critical advantage over conventional current sense amplifiers.
LT6100CDD#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT6100CDD#PBF FAQ
1.How can I place an order for LT6100CDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6100CDD#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 LT6100CDD#PBF reliable?
The price and inventory of LT6100CDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6100CDD#PBF is usually 5 days.
3.What payment methods are accepted for LT6100CDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6100CDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6100CDD#PBF?
LT6100CDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6100CDD#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 LT6100CDD#PBF?
For technical support, including LT6100CDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6100CDD#PBF requirements.
6.How does Aetrix verify that LT6100CDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT6100CDD#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 LT6100CDD#PBF meets industry standards.
7.What is the process for return or replacement of LT6100CDD#PBF?
All LT6100CDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6100CDD#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 LT6100CDD#PBF part is unused and in its original packaging.
Return procedure for LT6100CDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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