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Texas Instruments LMC8101BP
- Part No.:
- LMC8101BP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VFBGA
- Datasheet:
-
LMC8101BP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,826
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Product details
Overview
LMC8101BP from Texas Instruments is a rail-to-rail input and output CMOS operational amplifier optimized for low-voltage (2.7V–10V) battery-powered systems. It delivers 1MHz gain-bandwidth, ±5mV max offset voltage, 36nV/√Hz input voltage noise, <1mA supply current, and 35mV output swing headroom at 2kΩ load - enabling precision signal conditioning in portable voice/data interfaces and power amp control loops.
For engineers reviewing the LMC8101BP datasheet, LMC8101BP pinout, LMC8101BP application, or LMC8101BP equivalent, key selection considerations include its DSBGA-8 package footprint (1.39mm × 1.41mm), shutdown feature with 10µs turn-on time, rail-to-rail swing within 35mV of supplies, and verified performance at 2.7V single-supply operation.
Technical Context
The LMC8101BP implements a CMOS input stage with 10GΩ common-mode input resistance and 10pF input capacitance, supporting rail-to-rail input voltage range from −0.2V to V+ + 0.2V (at 2.7V supply). Its output stage delivers ±10mA short-circuit current and sustains rail-to-rail swing within 35mV of V+ and V− under 2kΩ load.
Shutdown is controlled via dual pins: SL selects reference supply (V+ or V−), and SD triggers shutdown when driven within ~1V of the selected supply. This architecture enables robust 1µA max shutdown current and eliminates floating-input uncertainty - critical for battery life extension in always-on sensor nodes and cellular RF front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 10V - supports single-cell Li-ion (3.0V nominal) and dual-cell alkaline (3.2V) systems without level-shifting. |
| Gain-Bandwidth Product | 1MHz - enables stable unity-gain buffer and 2nd-order active filter design up to ~100kHz with phase margin >45°. |
| Input Offset Voltage | ±5mV max - ensures ≤0.2% full-scale error in 2.5V-range battery-sense applications with 10-bit ADCs. |
| Output Swing (RL = 2kΩ) | Within 35mV of V+ and V− - achieves >97% dynamic range utilization at 2.7V supply for high-fidelity audio buffering. |
| Supply Current (Active) | <1mA max - extends coin-cell lifetime beyond 1 year in intermittent-sampling IoT sensor nodes (10s sleep, 1ms active). |
| Shutdown Current | 1µA max - reduces quiescent power to 2.7nW at 2.7V, enabling multi-year operation in energy-harvesting wearables. |
| Voltage Noise Density | 36nV/√Hz at 10kHz - maintains SNR >85dB in 20kHz-bandwidth voice preamps with 10kΩ source impedance. |
Pinout & Package
LMC8101BP is packaged in an 8-ball die-sized DSBGA (YPB) measuring 1.39mm × 1.41mm with 0.5mm ball pitch and maximum height of 0.575mm - optimized for ultra-thin mobile devices and space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | V+ | Positive supply input - must be decoupled with 100nF ceramic capacitor placed ≤2mm from ball for stability. |
| A2 | V+ | Redundant positive supply connection - improves current sharing and thermal distribution in high-PSRR layouts. |
| A3 | Inverting Input (−) | Differential input node - high-impedance CMOS input (10GΩ) enables direct connection to high-Z sensors without loading. |
| B1 | Output | Push-pull rail-to-rail output - drives 2kΩ loads to within 35mV of rails; short-circuit protected to ±10mA. |
| B3 | Non-inverting Input (+) | High-impedance input node - common-mode range extends 0.2V beyond supplies, supporting true single-supply biasing. |
| C1 | SD (Shutdown) | Active-low shutdown control - referenced to V− when SL = V−; threshold hysteresis prevents chatter near 1.5V transition. |
| C2 | V− | Negative supply or ground reference - required for dual-supply operation; tied to GND in single-supply configurations. |
| C3 | SL (Shutdown Logic) | Reference select for SD pin - connects to V− for ground-referenced shutdown or V+ for supply-referenced shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full 0V–2.7V signal swing in single-supply 2.7V systems without external level-shifting circuitry. |
| Versatile shutdown with SL/SD pins | Allows system-level power sequencing by referencing shutdown threshold to either V+ or V−, eliminating need for external voltage dividers. |
| Low 1/f noise (85nV/√Hz @10Hz) | Reduces integrated noise in DC-coupled sensor interfaces (e.g., thermopile, strain gauge) operating below 100Hz bandwidth. |
| Threefold higher output current vs. LMC7101 | Supports 2.5Vpp swing into 2mA loads at 2.7V supply - critical for driving RF power amplifier bias control loops with fast settling. |
| DSBGA-8 package (1.39mm × 1.41mm) | Reduces PCB area by 75% versus SOT-23, enabling placement beneath LCD modules and inside stacked mobile phone assemblies. |
Applications
| Portable Voice/Data Interface | Cellular Power Amplifier Control |
|---|---|
|
Use Scenario: Signal conditioning for headset microphone inputs and speaker outputs in Bluetooth headsets. IC Role / Device Role / Timing Role: Rail-to-rail I/O op-amp configured as AC-coupled preamplifier and line driver with 2.7V single supply. Use Value: Full 2.5Vpp dynamic range utilization preserves SNR in 16-bit audio paths while consuming <1mA total supply current. |
Use Scenario: Closed-loop bias control for GaAs RF power amplifiers in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Precision current-sense amplifier and DAC output buffer in PA bias feedback path. Use Value: ±5mV offset ensures <0.5% PA output power error; 10µs shutdown response enables rapid TDD mode transitions. |
| Battery Voltage Monitoring | VCO Tuning Voltage Buffer |
|
Use Scenario: High-impedance sensing of Li-ion cell voltage during charging/discharging cycles. IC Role / Device Role / Timing Role: Unity-gain buffer isolating battery terminal from ADC input, rejecting supply ripple. Use Value: 10GΩ input resistance prevents loading-induced voltage drop; 36nV/√Hz noise limits measurement uncertainty to <1mV RMS. |
Use Scenario: Low-noise buffering of PLL tuning voltage to VCO varactor diodes in frequency synthesizers. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage follower driving high-capacitance (>100pF) VCO control lines. Use Value: 85nV/√Hz 1/f noise minimizes phase jitter; rail-to-rail swing ensures full 0–2.7V VCO tuning range utilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7101IM5/NOPB | Higher 200nV/√Hz 1/f noise; 0.6mA supply current; no shutdown; SOT-23-5 package. | Lacks shutdown and rail-to-rail output - unsuitable for battery-critical systems requiring deep sleep modes. | Select only if board space allows SOT-23 and shutdown functionality is unnecessary. |
| TLV2462IDR | 2.5V–6V supply range; 650kHz GBW; ±2mV offset; shutdown pin; SOIC-8 package. | Lower supply voltage ceiling (6V max) and reduced output drive limit performance in 10V industrial sensor interfaces. | Prefer for cost-sensitive industrial designs where 6V max supply and SOIC-8 footprint are acceptable. |
Compared with LMC7101IM5/NOPB and TLV2462IDR, the LMC8101BP uniquely combines DSBGA-8 miniaturization, 2.7V–10V operation, sub-1mA active current, and configurable shutdown - making it the sole option for space-constrained, multi-voltage, battery-life-optimized designs requiring rail-to-rail precision.
Availability
LMC8101BP is available at Aetrix Electronics and suitable for portable communication devices, cellular RF front-ends, and battery monitoring systems requiring stable component supply across extended production lifecycles.
Supply support for LMC8101BP 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of innovation in precision amplifiers and low-power signal chains.
The LMC8101BP belongs to TI's LMC rail-to-rail op-amp family, engineered specifically for ultra-low-voltage, high-accuracy signal conditioning in portable and wireless infrastructure equipment.
FAQ
What is the maximum operating junction temperature for the LMC8101BP?
The LMC8101BP has a maximum junction temperature of +150°C, with an operating junction temperature range of −40°C to +85°C. Thermal resistance θJA is 220°C/W for the DSBGA package, meaning at 25°C ambient and 1mA supply current, junction temperature rise is approximately 220°C/W × 1mA × 2.7V = 0.6°C - well within safe limits for continuous operation in handheld devices.
Does the LMC8101BP require external components for stable shutdown operation?
No external components are required for basic shutdown operation of the LMC8101BP. When SL is tied to V− and SD is pulled to V−, the device enters shutdown with 1µA max current. However, to prevent undefined states, SL and SD must never be left floating - they must be actively driven or hard-connected to V+ or V− per Table 1 in the datasheet. No pull-up/down resistors are needed if controlled directly by MCU GPIOs.
Can the LMC8101BP drive capacitive loads without oscillation?
The LMC8101BP can drive up to 300pF capacitive load stably in unity-gain configuration at 2.7V supply. For heavier loads, stability is improved by adding a 100Ω isolation resistor between output and load (enabling unlimited C-load), increasing closed-loop gain above +1, raising supply voltage to 10V (extends limit to ~600pF), or adding 600Ω resistive load (increases phase margin and supports 16,000pF). These methods are validated in TI's Application Notes.
How does the LMC8101BP's offset voltage drift compare to the LMC7101?
The LMC8101BP specifies input offset voltage drift of 4μV/°C, identical to the LMC7101. However, its lower initial offset (±0.7mV typical vs. ±1.5mV for LMC7101) results in tighter absolute drift over temperature - e.g., over −40°C to +85°C, LMC8101BP drift remains within ±0.5mV, whereas LMC7101 may exceed ±1.0mV. This is confirmed in the "Delta VOS vs. VCM" plots (Figures 21–22) of the datasheet.
Is the LMC8101BP pin-compatible with other DSBGA-8 op-amps from Texas Instruments?
The LMC8101BP uses TI's YPB package drawing with standardized 0.5mm ball pitch and 1.39mm × 1.41mm body size, but its pinout (A1=V+, A2=V+, A3=IN−, B1=OUT, B3=IN+, C1=SD, C2=V−, C3=SL) is unique to the LMC8101 family. It is not pin-compatible with TLV2462 or OPA333 DSBGA variants - layout reuse requires verification against each device's specific ball map and thermal pad requirements.
LMC8101BP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- 1.3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA
LMC8101BP FAQ
1.How can I place an order for LMC8101BP through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC8101BP 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 LMC8101BP reliable?
The price and inventory of LMC8101BP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC8101BP is usually 5 days.
3.What payment methods are accepted for LMC8101BP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC8101BP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC8101BP?
LMC8101BP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC8101BP 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 LMC8101BP?
For technical support, including LMC8101BP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC8101BP requirements.
6.How does Aetrix verify that LMC8101BP is sourced from the original manufacturer or authorized distributors?
All LMC8101BP 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 LMC8101BP meets industry standards.
7.What is the process for return or replacement of LMC8101BP?
All LMC8101BP units undergo pre-shipment inspection (PSI). If there is an issue with LMC8101BP, 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 LMC8101BP part is unused and in its original packaging.
Return procedure for LMC8101BP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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