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Texas Instruments LMH6882SQ/NOPB
- Part No.:
- LMH6882SQ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
LMH6882SQ/NOPB.pdf
- Description:
- IC OPAMP DIFF 2 CIRCUIT 36WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,933
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Product details
Overview
LMH6882SQ/NOPB from Texas Instruments is a DC–2.4 GHz dual programmable differential amplifier optimized for RF/IF signal conditioning in high-linearity receiver chains. It delivers 26 dB to 6 dB voltage gain in precise 0.25 dB steps, 42 dBm OIP3 at 100 MHz, and 9.7 dB noise figure with 100 Ω differential input impedance - enabling direct interfacing with mixers and filters in microwave backhaul and I/Q sampling systems.
For engineers reviewing the LMH6882SQ/NOPB datasheet, LMH6882SQ/NOPB pinout, LMH6882SQ/NOPB application, or LMH6882SQ/NOPB equivalent, this page provides verified specifications, dual-channel timing behavior, parallel/SPI gain control trade-offs, thermal performance in WQFN-36, and validated alternatives for zero-IF receiver design, medical imaging front-ends, and differential cable driver implementations.
Technical Context
The LMH6882SQ/NOPB integrates three functional stages per channel: a low-noise amplifier, a digitally controlled attenuator, and a low-distortion output buffer. Its architecture maintains consistent OIP3 (≥40 dBm) and NF (≤9.7 dB) across the full 20 dB gain range - unlike conventional VGAs where linearity degrades at lower gains.
It supports both parallel (7-bit bus, 0.25 dB steps) and SPI-compatible serial programming, with independent channel gain control only available in serial mode. Power-down is implemented via dedicated SD pin (parallel mode) or register write (SPI mode), achieving 25 mA disabled supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small Signal Bandwidth | 2.4 GHz - supports wideband RF/IF signals up to L-band without external compensation. |
| OIP3 @ 100 MHz | 42 dBm - enables high dynamic range reception in dense spectral environments (e.g., microwave backhaul). |
| Voltage Gain Range | 6 dB to 26 dB - digitally programmable in 0.25 dB increments for precise AGC loop calibration. |
| Noise Figure | 9.7 dB - ensures minimal degradation of system SNR when driving ADCs in zero-IF receivers. |
| Input Impedance | 100 Ω differential / 50 Ω single-ended - eliminates external matching networks for mixer or filter interfaces. |
| Supply Voltage | 4.75 V to 5.25 V - compatible with standard 5 V analog rails; supports stable operation over industrial temperature range (−40°C to +85°C). |
| Gain Step Error | ±0.125 dB - guarantees amplitude accuracy across adjacent gain codes for coherent I/Q path matching. |
Pinout & Package
The LMH6882SQ/NOPB is housed in a thermally enhanced 36-pin WQFN package (6.00 mm × 6.00 mm) with exposed center pad bonded to ground for optimal thermal dissipation (RθJC(bot) = 3.5 °C/W). Pin functions are validated per TI SNOSC84D Rev D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INPDA, INMDA / INPDB, INMDB | Differential Analog Input (Ch A/B) | 100 Ω input impedance; self-biased common-mode at 2.5 V; accepts DC- or AC-coupled signals. |
| INPSA, INMSA / INPSB, INMSB | Single-Ended Analog Input (Ch A/B) | 50 Ω termination on unused input required; enables interface with 50 Ω RF sources without external balun. |
| OUTPA, OUTMA / OUTPB, OUTMB | Differential Analog Output (Ch A/B) | Low-impedance (<0.4 Ω) outputs drive 200 Ω loads directly; supports DC-coupled ADC inputs. |
| OCMA, OCMB | Output Common-Mode Control (Ch A/B) | Gain-of-2 input: 1.25 V sets 2.5 V output common-mode; critical for ADC input level alignment. |
| D0–D6, SD, SPI | Digital Gain & Mode Control | Parallel mode (SPI = 0): 7-bit bus for 0.25 dB steps; Serial mode (SPI = 1): SPI-compatible interface with CS/CLK/SDI/SDO. |
| VCC (pins 3,4,24,25) | Power Supply | Four dedicated 5 V supply pins reduce IR drop and improve PSRR; requires local 0.1 µF + 10 µF decoupling. |
| GND (pins 5,6,22,23) | Ground | Four low-inductance ground pins + exposed thermal pad; must connect to solid ground plane for EMI and thermal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel independent gain control | Enabled only in SPI mode - allows asymmetric gain settings between channels for I/Q path calibration. |
| Channel-to-channel gain matching | 0.2 dB max mismatch at 100 MHz - ensures amplitude balance in quadrature demodulators. |
| Channel-to-channel phase matching | 1.5° max mismatch at 100 MHz - preserves phase coherence critical for image rejection in zero-IF receivers. |
| Gain step switching time | 20 ns - supports fast AGC response in burst-mode communication systems (e.g., TDD LTE). |
| Enable/disable settling time | 15 ns to 90% level - enables rapid channel blanking during transmit/receive transitions. |
Applications
| Microwave Backhaul Radio Receiver | Zero-IF Sampling System |
|---|---|
Use Scenario: Amplifies downconverted IF signals (70–140 MHz) from double-balanced mixers before digitization in point-to-point wireless infrastructure. IC Role / Device Role / Timing Role: Programmable gain block placed between mixer and ADC; provides adjustable gain to maintain optimal ADC input level under varying RF signal conditions. Use Value: 42 dBm OIP3 prevents intermodulation distortion from adjacent channel interference; 0.25 dB gain resolution enables fine-tuned AGC loop stability. |
Use Scenario: Conditions baseband I and Q signals after quadrature demodulation in software-defined radios and cellular base stations. IC Role / Device Role / Timing Role: Dual-channel differential amplifier with matched gain/phase; drives ADC inputs while preserving I/Q orthogonality. Use Value: 0.2 dB gain and 1.5° phase matching minimizes image rejection ratio (IRR) degradation; DC coupling supports baseband frequencies down to 0 Hz. |
| Medical Ultrasound Imaging Front-End | Differential Cable Driver |
Use Scenario: Amplifies low-amplitude echo signals from piezoelectric transducers in portable ultrasound systems before time-gain compensation (TGC) processing. IC Role / Device Role / Timing Role: High-linearity, low-noise preamplifier stage; interfaces directly with 50 Ω coaxial transducer cables. Use Value: 9.7 dB noise figure maximizes signal-to-noise ratio for weak echo detection; 2.4 GHz bandwidth accommodates harmonic imaging up to 15 MHz. |
Use Scenario: Drives long differential traces (e.g., LVDS or custom protocols) on PCBs or flexible cables in test equipment and data acquisition modules. IC Role / Device Role / Timing Role: Low-output-impedance driver (0.4 Ω) with rail-to-rail swing capability; replaces discrete op-amp + resistor networks. Use Value: Eliminates external gain-setting resistors; 6 VPPD output swing at <10 MHz ensures robust signal integrity over lossy interconnects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6881SQ/NOPB | Single-channel version in same WQFN-36 package; identical gain range, bandwidth, and linearity specs. | Suitable only for single-path signal chains; lacks second channel for I/Q or diversity architectures. | Select LMH6881SQ/NOPB when space-constrained designs require only one programmable amplifier channel. |
| ADL5562ACPZ-R7 | Fixed-gain (16 dB) differential amplifier; 3.2 GHz bandwidth; 22 dBm OIP3 at 100 MHz; no digital gain control. | Requires external attenuators or DAC-controlled VGA stages for variable gain; higher noise figure (10.5 dB). | Choose ADL5562ACPZ-R7 for ultra-wideband fixed-gain amplification where digital control is unnecessary and cost is prioritized. |
Compared with LMH6882SQ/NOPB, LMH6881SQ/NOPB reduces channel count but retains identical per-channel performance, while ADL5562ACPZ-R7 trades programmability for wider bandwidth and lower cost in fixed-gain roles - making LMH6882SQ/NOPB uniquely suited for multi-channel, digitally calibrated RF front-ends.
Availability
LMH6882SQ/NOPB is available at Aetrix Electronics and suitable for microwave backhaul radio receivers, zero-IF sampling systems, and medical ultrasound imaging front-ends requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for LMH6882SQ/NOPB 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 decades of expertise in high-speed amplifier design and RF signal chain solutions.
The LMH6882SQ/NOPB belongs to TI's high-linearity programmable differential amplifier product line, engineered specifically for DC-coupled, wideband receiver applications demanding simultaneous high OIP3, low noise figure, and precise digital gain control.
FAQ
What is the maximum operating frequency of the LMH6882SQ/NOPB?
The LMH6882SQ/NOPB has a small-signal −3-dB bandwidth of 2.4 GHz, verified under standard test conditions (VCC = 5 V, RL = 200 Ω, maximum gain). This bandwidth supports signal conditioning up to L-band frequencies and enables use in microwave backhaul and broadband test equipment without external compensation networks.
Does the LMH6882SQ/NOPB support single-ended input signals?
Yes, the LMH6882SQ/NOPB supports single-ended inputs via dedicated pins (INPSA/INMSA and INPSB/INMSB) with 50 Ω input impedance. When using single-ended mode, the unused complementary input must be terminated to 50 Ω to maintain proper common-mode bias and distortion performance.
How does gain control differ between parallel and serial modes on the LMH6882SQ/NOPB?
In parallel mode (SPI pin = LOW), the LMH6882SQ/NOPB uses a 7-bit bus (D0–D6) for 0.25 dB gain steps across both channels simultaneously. In serial mode (SPI pin = HIGH), it implements SPI-compatible communication (CS/CLK/SDI/SDO) enabling independent channel gain control and finer resolution within the same 6–26 dB range.
What is the purpose of the OCM pin on the LMH6882SQ/NOPB?
The OCM pin (Output Common-Mode) on the LMH6882SQ/NOPB sets the output common-mode voltage with a gain of 2 - applying 1.25 V yields a 2.5 V common-mode level. This feature ensures precise alignment with ADC input requirements and eliminates need for external level-shifting circuitry in DC-coupled signal paths.
Can the LMH6882SQ/NOPB be used in DC-coupled applications?
Yes, the LMH6882SQ/NOPB is fully DC-coupled: its input common-mode is self-biased at 2.5 V, and its output common-mode is programmable via the OCM pin. This enables seamless integration into baseband and zero-IF architectures where AC coupling would degrade low-frequency response or introduce phase errors.
LMH6882SQ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMH®
- Package/Case:
- 36-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 2
- Output Type:
- Differential
- Slew Rate:
- 6000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 2.4 GHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 200mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.75 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-WQFN (6x6)
LMH6882SQ/NOPB FAQ
1.How can I place an order for LMH6882SQ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMH6882SQ/NOPB 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 LMH6882SQ/NOPB reliable?
The price and inventory of LMH6882SQ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMH6882SQ/NOPB is usually 5 days.
3.What payment methods are accepted for LMH6882SQ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMH6882SQ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMH6882SQ/NOPB?
LMH6882SQ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMH6882SQ/NOPB 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 LMH6882SQ/NOPB?
For technical support, including LMH6882SQ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMH6882SQ/NOPB requirements.
6.How does Aetrix verify that LMH6882SQ/NOPB is sourced from the original manufacturer or authorized distributors?
All LMH6882SQ/NOPB 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 LMH6882SQ/NOPB meets industry standards.
7.What is the process for return or replacement of LMH6882SQ/NOPB?
All LMH6882SQ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMH6882SQ/NOPB, 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 LMH6882SQ/NOPB part is unused and in its original packaging.
Return procedure for LMH6882SQ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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