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Analog Devices Inc. LTC6911IMS-1#PBF
- Part No.:
- LTC6911IMS-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6911IMS-1#PBF.pdf
- Description:
- IC OPAMP PGA 2 CIRCUIT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
LTC6911IMS-1#PBF from Analog Devices (formerly Linear Technology) is a dual-channel, digitally programmable gain amplifier (PGA) with inverting architecture and 3-bit parallel gain control. It delivers precise inverting gains of 0, 1, 2, 5, 10, 20, 50, or 100 V/V, features rail-to-rail input/output swing, 11 MHz gain-bandwidth product, and 0.1 dB max channel-to-channel gain matching - enabling high-fidelity signal conditioning in precision data acquisition systems.
For engineers reviewing the LTC6911IMS-1#PBF datasheet, LTC6911IMS-1#PBF pinout, LTC6911IMS-1#PBF application, or LTC6911IMS-1#PBF equivalent, key selection criteria include its matched dual-channel topology, MSOP-10 package compatibility, single/dual supply operation (2.7V–10.5V), 10 nV/√Hz input voltage noise density at gain=1, and guaranteed performance over –40°C to 85°C.
Technical Context
The LTC6911IMS-1#PBF integrates two fully matched, MOS-input operational amplifiers with digitally controlled resistor arrays for gain setting. Its internal architecture uses a current-summing node referenced to AGND, enabling true rail-to-rail input operation at unity gain and predictable input impedance scaling (e.g., 10 kΩ at G=1, 1 kΩ at G=100).
Gain is set via three logic inputs (G0–G2) with deterministic, monotonic response across all eight settings; the "zero gain" state (000) disconnects inputs and forces outputs to AGND. The device generates its own mid-supply reference at AGND, supporting single-supply operation without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Inverting gains of 0, 1, 2, 5, 10, 20, 50, 100 V/V - enables discrete dynamic range adjustment without analog trimming. |
| Gain Bandwidth Product | 11 MHz at G=100 - supports >100 kHz closed-loop bandwidth even at highest gain, critical for wideband sensor interfaces. |
| Input Voltage Noise | 10 nV/√Hz at G=1 - ensures low-noise amplification of microvolt-level signals in precision instrumentation. |
| Rail-to-Rail I/O | Full swing from V– to V+ on input and output - maximizes dynamic range in low-voltage (2.7V) or split-supply (±5V) systems. |
| Channel Matching | 0.1 dB max gain mismatch - eliminates inter-channel amplitude error in differential or multi-sensor acquisition paths. |
| Supply Range | 2.7V to 10.5V total - operates from single Li-ion (3.3V/3.7V) or dual ±5V rails without level-shifting circuitry. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood environments (I-grade). |
Pinout & Package
Package: 10-Lead MSOP (3 mm × 3 mm, 0.5 mm pitch), exposed pad for thermal enhancement. Pin 1 marked by dot; pin numbering follows standard MSOP convention (counterclockwise from dot).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA) | Channel A Inverting Input | Differential input node referenced to AGND; impedance varies with gain (10 kΩ at G=1, 1 kΩ at G=100). |
| 2 (AGND) | Analog Ground Reference | Internally generated mid-supply voltage; serves as DC reference for both input common-mode and output swing. |
| 3 (INB) | Channel B Inverting Input | Matched to INA; identical gain-dependent input impedance and rail-to-rail voltage range. |
| 4 (G0) | Digital Gain Control Bit 0 | LSB of 3-bit parallel interface; TTL/CMOS-compatible with VIH = 2.43V (2.7V supply) or 4.5V (5V supply). |
| 5 (G1) | Digital Gain Control Bit 1 | MSB-1 of gain select; controls coarse gain steps (e.g., toggling G1 changes gain from 1→2 or 10→20). |
| 6 (G2) | Digital Gain Control Bit 2 | MSB of gain select; enables highest gain states (50, 100 V/V); zero-gain (000) disables input path. |
| 7 (OUTA) | Channel A Output | Fully buffered inverting output; drives 10 kΩ load to within 20 mV of rails at 5V supply. |
| 8 (OUTB) | Channel B Output | Matched to OUTA; <100 ps inter-channel skew ensures synchronous signal processing. |
| 9 (V–) | Negative Supply | Accepts ground (single supply) or negative rail (dual supply); no reverse polarity protection. |
| 10 (V+) | Positive Supply | Supports up to 10.5V; internal regulators derive AGND and bias voltages - no external decoupling required beyond 0.1 µF. |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched PGA channels | Guaranteed 0.1 dB gain match enables simultaneous sampling of differential or redundant sensor pairs without calibration. |
| Zero-gain disable mode | Digital input 000 disconnects both inputs and forces outputs to AGND - eliminates leakage-induced offset in standby or multiplexed systems. |
| Internal AGND generation | Self-biasing mid-supply reference eliminates need for external resistive divider or op-amp buffer in single-supply configurations. |
| Rail-to-rail input at unity gain | Accepts signals from V– to V+ with no headroom loss - preserves full ADC input range when driving successive-stage converters. |
| Low 10 nV/√Hz input noise | Enables 120 dB system dynamic range when paired with 24-bit sigma-delta ADCs in weigh-scale or medical ECG front-ends. |
Applications
| Data Acquisition Systems | Automatic Gain Control Loops |
|---|---|
Use Scenario: Simultaneous digitization of multiple sensor outputs (e.g., strain gauges, thermocouples) with varying signal amplitudes into a shared 24-bit ADC. IC Role / Device Role / Timing Role: Dual-channel PGA provides matched, digitally switched gain per channel to normalize input ranges before multiplexing. Use Value: Eliminates per-channel analog gain trim components and reduces BOM count by 40% versus discrete op-amp + DAC solutions. | Use Scenario: Real-time adjustment of microphone preamplifier gain in voice-controlled IoT devices to maintain constant output level amid ambient noise fluctuations. IC Role / Device Role / Timing Role: LTC6911IMS-1#PBF acts as the analog gain element in a closed-loop AGC system, updated every 10 ms via microcontroller GPIOs. Use Value: Achieves <±0.5 dB gain accuracy across 40 dB dynamic range without software compensation due to inherent channel matching. |
| Dynamic Range Expansion Circuits | Industrial Sensor Signal Conditioning |
Use Scenario: Extending effective resolution of a 16-bit SAR ADC used in programmable logic controller (PLC) analog input modules handling ±10V, 4–20 mA, and thermistor inputs. IC Role / Device Role / Timing Role: LTC6911IMS-1#PBF scales low-level sensor signals (e.g., 10 mV thermocouple) to full-scale ADC range while rejecting high-level transients. Use Value: Delivers 18-bit ENOB-equivalent performance through programmable gain staging, avoiding costly 18-bit ADCs. | Use Scenario: Signal conditioning for 4-wire RTD measurements in process control transmitters where lead resistance cancellation requires matched excitation and sensing paths. IC Role / Device Role / Timing Role: Dual PGA channels condition both excitation current sense and RTD voltage simultaneously with identical gain/phase response. Use Value: Reduces temperature measurement error from channel mismatch to <0.02°C over –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8253ARMZ | Single-channel, SPI interface, 10–1000 V/V gains, higher 20 MHz GBW, but no zero-gain mode. | Requires external digital isolator for industrial noise immunity; lacks dual-channel synchronization. | Select when higher bandwidth or SPI control is prioritized over channel matching and zero-gain disable. |
| LTC6915IMS#PBF | Dual-channel like LTC6911IMS-1#PBF, but offers 1–128 V/V (non-inverting), lower 8 MHz GBW, and 0.05% gain accuracy vs. 0.1 dB matching. | Better for non-inverting topologies; less suitable for inverting summing or differential gain applications. | Choose when non-inverting configuration, tighter absolute gain tolerance, or lower quiescent current (1.8 mA/ch) is required. |
Compared with AD8253ARMZ and LTC6915IMS#PBF, the LTC6911IMS-1#PBF uniquely combines dual-channel inverting gain control, zero-gain disable, and sub-0.1 dB matching in a compact MSOP-10 - making it optimal for synchronized, low-noise, multi-sensor front-ends where layout symmetry and power efficiency are critical.
Availability
LTC6911IMS-1#PBF is available at Aetrix Electronics and suitable for industrial automation, test equipment, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC6911IMS-1#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC6911IMS-1#PBF belongs to ADI's precision signal conditioning portfolio, designed specifically for high-accuracy, low-noise data acquisition systems where channel matching, programmable gain agility, and rail-to-rail operation are essential.
FAQ
What gain options does the LTC6911IMS-1#PBF support?
The LTC6911IMS-1#PBF supports eight discrete inverting voltage gains: 0 (zero-gain disable), 1, 2, 5, 10, 20, 50, and 100 V/V, selected via a 3-bit parallel digital interface (G0–G2). These values are fixed and monotonic - no interpolation or analog tuning is required. Gain accuracy is specified to ±0.1 dB matching between channels at all settings.
Does the LTC6911IMS-1#PBF require external components for single-supply operation?
No. The LTC6911IMS-1#PBF internally generates its AGND reference at mid-supply, eliminating the need for external resistive dividers or op-amp buffers in single-supply configurations. Only standard 0.1 µF ceramic decoupling on V+ and ≥1 µF bulk capacitance on AGND are recommended per the datasheet.
How does input impedance vary with gain on the LTC6911IMS-1#PBF?
Input impedance at INA and INB pins scales inversely with gain: approximately 10 kΩ at G=1, 5 kΩ at G=2, 2 kΩ at G=5, 1 kΩ at G=10 and above, and >100 MΩ in zero-gain (000) mode. This behavior is inherent to its digitally switched resistor array architecture and must be accounted for when interfacing high-output-impedance sensors.
What is the maximum operating temperature range for the LTC6911IMS-1#PBF?
The LTC6911IMS-1#PBF is rated for operation from –40°C to +85°C (I-grade), with full electrical specifications guaranteed across this range. It is not rated for extended temperature operation (e.g., H-grade –40°C to +125°C), which is available only in the LTC6911HMS-1 variant.
Can the LTC6911IMS-1#PBF drive heavy loads such as 500 Ω?
Yes. The LTC6911IMS-1#PBF delivers rail-to-rail output swing into 500 Ω loads: at 5V supply, output swings within 90–175 mV of each rail depending on direction. Output short-circuit current is ±35 mA (±5V supply), supporting moderate capacitive loads (<100 pF) without stability issues when properly decoupled.
LTC6911IMS-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Programmable Gain
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 16V/µs
- Gain Bandwidth Product:
- 11 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 3.1mA (x2 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC6911IMS-1#PBF FAQ
1.How can I place an order for LTC6911IMS-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6911IMS-1#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 LTC6911IMS-1#PBF reliable?
The price and inventory of LTC6911IMS-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6911IMS-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC6911IMS-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6911IMS-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6911IMS-1#PBF?
LTC6911IMS-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6911IMS-1#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 LTC6911IMS-1#PBF?
For technical support, including LTC6911IMS-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6911IMS-1#PBF requirements.
6.How does Aetrix verify that LTC6911IMS-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6911IMS-1#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 LTC6911IMS-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC6911IMS-1#PBF?
All LTC6911IMS-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6911IMS-1#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 LTC6911IMS-1#PBF part is unused and in its original packaging.
Return procedure for LTC6911IMS-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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