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Analog Devices Inc. LTC6911CMS-1#TRPBF
- Part No.:
- LTC6911CMS-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC6911CMS-1#TRPBF.pdf
- Description:
- IC OPAMP PGA 2 CIRCUIT 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:605
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Product details
Overview
LTC6911CMS-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, inverting, digitally programmable gain amplifier (PGA) with 3-bit parallel gain control, offering eight discrete inverting gains: 0, 1, 2, 5, 10, 20, 50, and 100 V/V. It features rail-to-rail input and output operation, 11 MHz gain-bandwidth product, 10 nV/√Hz input voltage noise density at 50 kHz, and channel-to-channel gain matching of ≤0.1 dB. It is used in precision data acquisition systems requiring dynamic range optimization and matched signal paths.
For engineers reviewing the LTC6911CMS-1#TRPBF datasheet, LTC6911CMS-1#TRPBF pinout, LTC6911CMS-1#TRPBF application, or LTC6911CMS-1#TRPBF equivalent, key selection criteria include guaranteed gain accuracy across temperature, dual-channel matching performance, single-supply compatibility down to 2.7 V, and MSOP-10 package suitability for space-constrained analog front-ends.
Technical Context
The LTC6911CMS-1#TRPBF implements two fully matched, MOS-input operational amplifiers with digitally controlled feedback resistor arrays. Gain selection is performed via three independent CMOS logic inputs (G0–G2), enabling deterministic, glitch-free switching between eight precise inverting gain states without external components.
Its internal AGND reference generation supports true rail-to-rail operation from single supplies (2.7 V to 10.5 V total), while channel isolation exceeds 108 dB at 200 kHz and total system dynamic range reaches 120 dB - enabled by low offset drift (6.6 µV/°C at G=10) and wideband noise of 3.8 µVRMS (G=100, 1 kHz–200 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Inverting gains of 0, 1, 2, 5, 10, 20, 50, 100 V/V - enables precise signal scaling without external resistors. |
| Gain Bandwidth Product | 11 MHz at G=100 - supports high-speed acquisition up to ~100 kHz full-power bandwidth with G=100. |
| Input Voltage Noise | 10 nV/√Hz at 50 kHz (G=1) - preserves SNR in low-level sensor signal conditioning. |
| Channel Matching | ≤0.1 dB gain mismatch over temperature - ensures consistent amplitude response in dual-path systems like differential ADC drivers. |
| Supply Range | 2.7 V to 10.5 V total (single or dual supply) - operates from Li-ion battery (3.0 V) or ±5 V rails without level-shifting. |
| Output Swing | Rail-to-rail swing into 10 kΩ load - delivers full-scale output even at low supply voltages. |
| Dynamic Range | 120 dB system-level - achieved via low noise, low distortion (–90 dB THD at 10 kHz), and high PSRR (80 dB). |
Pinout & Package
Package: 10-Lead MSOP (3 mm × 3 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INA) | Channel A inverting input | Voltage difference between INA and AGND sets A-channel input; input resistance varies with gain (10 kΩ at G=1, 1 kΩ at G≥10). |
| 2 (AGND) | Analog ground reference | Internally generated mid-supply reference; serves as DC common-mode point for inputs/outputs in single-supply operation. |
| 3 (INB) | Channel B inverting input | Functionally identical to INA; matched to INA for gain, offset, and noise performance. |
| 4 (G0) | Digital gain control bit 0 | LSB of 3-bit parallel interface; CMOS-compatible logic levels (0.27 V / 2.43 V at VS=2.7 V). |
| 5 (G1) | Digital gain control bit 1 | Mid-bit of gain select bus; enables deterministic gain state transitions without metastability. |
| 6 (G2) | Digital gain control bit 2 | MSB of gain select bus; all three bits (G2–G0) must be stable before gain settles. |
| 7 (OUTA) | Channel A inverting output | Amplified, inverted version of INA–AGND; drives loads ≥500 Ω with <170 mV headroom at 5 V supply. |
| 8 (OUTB) | Channel B inverting output | Matched to OUTA in gain, slew rate (12 V/µs), and settling time; supports simultaneous dual-path processing. |
| 9 (V–) | Negative supply rail | Connect to ground (single supply) or negative rail (dual supply); current sink capability up to ±35 mA. |
| 10 (V+) | Positive supply rail | Accepts 2.7 V to 10.5 V total supply; quiescent current per channel is 3.75 mA typical at 5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual matched PGA architecture | Guaranteed ≤0.1 dB inter-channel gain mismatch ensures amplitude coherence in stereo, differential, or redundant sensing paths. |
| Rail-to-rail I/O with AGND reference | Eliminates need for external level-shifting circuitry in single-supply 3.3 V or 5 V systems; AGND remains stable across supply variations. |
| Zero-gain disable mode (G2G1G0 = 000) | Disconnects inputs and forces outputs to AGND - provides clean signal muting without loading source impedance. |
| Low 10 nV/√Hz input voltage noise | Enables high-fidelity amplification of microvolt-level signals (e.g., thermocouples, strain gauges) without degrading SNR. |
| 120 dB system dynamic range | Combines low noise, low THD (–90 dB), and high PSRR (80 dB) to resolve small signals in presence of large interferers. |
Applications
| Medical Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Amplifying low-amplitude bio-potential signals (ECG, EEG) with automatic gain adjustment to accommodate varying electrode contact impedances. IC Role / Device Role / Timing Role: Dual-channel inverting PGA providing matched, low-noise, programmable gain for differential front-end conditioning prior to ADC sampling. Use Value: Maintains >110 dB SNR across patient populations and electrode types using G=100 for microvolt signals and G=1 for millivolt artifacts - no manual range switching required. | Use Scenario: Conditioning sensor outputs (pressure, temperature, current shunt) in PLC analog input modules where signal levels vary widely across field devices. IC Role / Device Role / Timing Role: Digitally reconfigurable gain stage enabling one hardware design to support multiple sensor ranges (e.g., 4–20 mA, ±10 V, mV-level RTDs). Use Value: Reduces BOM count and calibration complexity by replacing four fixed-gain op-amp circuits with a single LTC6911CMS-1#TRPBF per channel pair. |
| Test & Measurement Equipment | Automotive Battery Monitoring |
Use Scenario: Scaling unknown input amplitudes in handheld multimeters or oscilloscope front-ends to maximize ADC utilization without clipping. IC Role / Device Role / Timing Role: Fast-settling, low-distortion PGA that adjusts gain in real time based on input peak detection to maintain optimal digitization resolution. Use Value: Achieves 16-bit effective resolution across 8 decades of input range (100 µV to 10 V) using only three digital control lines and no external passive components. | Use Scenario: Monitoring individual cell voltages in 12S Li-ion battery packs where cell imbalance requires precise, matched gain for accurate delta-V tracking. IC Role / Device Role / Timing Role: Dual-channel PGA simultaneously amplifying adjacent cell pairs to detect subtle voltage differentials (<1 mV) under load transients. Use Value: Channel matching ≤0.1 dB ensures <5 µV measurement error in differential cell comparisons - critical for state-of-charge estimation accuracy. |
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-controlled PGA with G=1/2/4/8; higher gain accuracy (±0.05% vs ±0.1 dB), but no dual-channel match spec. | Requires two devices for dual-path use; lacks zero-gain mute mode; supports wider supply (4.5–36 V). | Preferred when SPI interface and ultra-precise single-channel gain are prioritized over channel matching and space efficiency. |
| LTC6915IMS#TRPBF | Dual-channel, 4-bit parallel PGA (G=1–128 V/V); higher resolution, lower noise (8.5 nV/√Hz), but larger 16-lead MSOP package. | Supports finer gain steps for closed-loop auto-ranging; not drop-in compatible due to extra pins and different pinout. | Chosen when 16 gain states and sub-0.05 dB matching are required, and PCB area allows 16-lead footprint. |
Compared with AD8253ARMZ and LTC6915IMS#TRPBF, the LTC6911CMS-1#TRPBF uniquely balances dual-channel matching, compact 10-lead MSOP packaging, zero-gain muting, and 3-bit simplicity - making it optimal for cost-sensitive, space-constrained dual-path systems needing deterministic parallel control.
Availability
LTC6911CMS-1#TRPBF is available at Aetrix Electronics and suitable for medical instrumentation, industrial data acquisition, test & measurement equipment, and automotive battery monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC6911CMS-1#TRPBF 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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC6911CMS-1#TRPBF belongs to ADI's precision signal conditioning portfolio, designed specifically for applications demanding matched dual-channel programmability, low noise, and robust single-supply operation in portable and industrial measurement systems.
FAQ
What gain settings does the LTC6911CMS-1#TRPBF support?
The LTC6911CMS-1#TRPBF supports eight discrete inverting voltage gains: 0 (mute), 1, 2, 5, 10, 20, 50, and 100 V/V, selected via its 3-bit parallel digital interface (G2, G1, G0). These gains are factory-trimmed and specified over temperature; gain error is ≤±0.1 dB at G=10 and ≤±0.2 dB at G=100 under typical conditions.
Does the LTC6911CMS-1#TRPBF require external resistors to set gain?
No, the LTC6911CMS-1#TRPBF integrates digitally controlled resistor arrays internally - no external gain-setting components are needed. All eight gain states are implemented using laser-trimmed thin-film resistors and CMOS switches, ensuring stability, repeatability, and minimal board area usage.
Can the LTC6911CMS-1#TRPBF operate from a single 3.3 V supply?
Yes, the LTC6911CMS-1#TRPBF operates from a single supply as low as 2.7 V. With its internally generated AGND reference, it delivers rail-to-rail input and output swing at 3.3 V - supporting full-scale operation from 0 V to 3.3 V on both inputs and outputs when referenced to AGND.
How is channel-to-channel matching specified for the LTC6911CMS-1#TRPBF?
Channel-to-channel gain matching for the LTC6911CMS-1#TRPBF is specified as ≤0.1 dB maximum over the full operating temperature range (–40°C to 85°C). This applies across all gain settings and is measured differentially between channels A and B under identical conditions - critical for differential signal processing and coherent sampling.
What is the purpose of the AGND pin on the LTC6911CMS-1#TRPBF?
The AGND pin on the LTC6911CMS-1#TRPBF is an internally generated analog ground reference, typically at VS/2 for single supplies. It serves as the common-mode reference for both inputs and outputs, enabling true rail-to-rail operation without external biasing - simplifying single-supply design and eliminating input/output level-shifting circuitry.
LTC6911CMS-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC6911CMS-1#TRPBF FAQ
1.How can I place an order for LTC6911CMS-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6911CMS-1#TRPBF 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 LTC6911CMS-1#TRPBF reliable?
The price and inventory of LTC6911CMS-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6911CMS-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6911CMS-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6911CMS-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6911CMS-1#TRPBF?
LTC6911CMS-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6911CMS-1#TRPBF 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 LTC6911CMS-1#TRPBF?
For technical support, including LTC6911CMS-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6911CMS-1#TRPBF requirements.
6.How does Aetrix verify that LTC6911CMS-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6911CMS-1#TRPBF 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 LTC6911CMS-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6911CMS-1#TRPBF?
All LTC6911CMS-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6911CMS-1#TRPBF, 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 LTC6911CMS-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC6911CMS-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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