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Analog Devices Inc. LT6235IGN#PBF
- Part No.:
- LT6235IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT6235IGN#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LT6235IGN#PBF from Analog Devices (formerly Linear Technology) is a quad low-noise, rail-to-rail output, unity-gain stable operational amplifier optimized for precision signal conditioning in low-voltage systems. It delivers 1.9nV/√Hz input voltage noise, 60MHz gain-bandwidth product (per amplifier), 1.2mA supply current per amplifier, and operates from 3V to 12.6V supplies - enabling high-fidelity amplification in ultrasound front-ends and A/D driver stages.
For engineers reviewing the LT6235IGN#PBF datasheet, LT6235IGN#PBF pinout, LT6235IGN#PBF application, or LT6235IGN#PBF equivalent, key selection criteria include its 16-pin SSOP package, –40°C to 85°C industrial temperature rating, channel-to-channel matching performance (e.g., 1000µV max input offset voltage match), and enable-controlled shutdown capability (1.5µA disabled current).
Technical Context
The LT6235IGN#PBF implements a fully differential, quad-amplifier architecture with independent enable pins per pair (pins 5/6 control amps A/B; pins 13/14 control amps C/D), supporting selective power gating in multi-channel systems. Its input stage uses bipolar transistor topology to achieve low 1.9nV/√Hz voltage noise and balanced 0.43pA/√Hz current noise at 10kHz with 10kΩ source resistance.
Each amplifier features rail-to-rail output swing within 50mV of either supply rail, 115dB typical CMRR, and 17V/µs slew rate (at ±5V), enabling accurate buffering of wide-dynamic-range sensor signals without clipping in 3.3V or ±2.5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz at 10kHz - enables sub-μV signal amplification in high-resolution data acquisition |
| Gain-Bandwidth Product | 60MHz per amplifier - supports stable unity-gain and moderate-gain configurations up to ~3MHz full-power bandwidth |
| Supply Current per Amp | 1.2mA max - allows four-channel operation under 5mA total, critical for battery-powered portable instruments |
| Input Offset Voltage | 700µV max (–40°C to 85°C) - ensures DC accuracy in precision transducer interfaces without trimming |
| Output Swing | Within 50mV of rails - maximizes dynamic range in low-voltage ADC drivers (e.g., 3.3V SAR converters) |
| Common Mode Rejection | 90dB min (–40°C to 85°C) - suppresses supply and ground noise in single-supply sensor front-ends |
| Enable Shutdown Current | 1.5µA max per enabled pair - permits dynamic channel disabling to reduce system power during idle cycles |
Pinout & Package
LT6235IGN#PBF is housed in a 16-lead narrow plastic SSOP (GN package), 5.3mm × 6.2mm body, 0.635mm pitch, with exposed pad thermally connected to V– (optional PCB connection). Pin 1 marked by dot; pin 1 = OUT A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives low-impedance loads up to 30mA; rail-to-rail swing supports full-scale ADC input |
| 2 | –IN A | Inverting input of Amp A - matched to +IN A for <1000µV offset voltage difference across temperature |
| 3 | +IN A | Non-inverting input of Amp A - high common-mode range (–3V to 4V on ±5V supply) enables direct sensor interfacing |
| 4 | V+ | Positive supply rail - accepts 3V to 12.6V; PSRR >90dB minimizes supply ripple coupling |
| 5 | +IN B | Non-inverting input of Amp B - shares enable control with Amp A via pin 6 (EN A/B) |
| 6 | –IN B | Inverting input of Amp B - channel-matched to Amp A for differential pair applications |
| 7 | OUT B | Amplifier B output - electrically isolated from Amp A; supports independent feedback networks |
| 8 | NC | No connect - internal die pad; must remain unconnected per datasheet |
| 9 | OUT D | Amplifier D output - controlled by EN C/D (pins 13/14); identical AC/DC specs to Amp A |
| 10 | –IN D | Inverting input of Amp D - matched to +IN D for consistent quad-channel performance |
| 11 | +IN D | Non-inverting input of Amp D - referenced to same V+ and V– as all channels |
| 12 | V– | Negative supply rail - connects to exposed thermal pad; provides return path for 30mA output sink/source |
| 13 | +IN C | Non-inverting input of Amp C - paired with –IN C (pin 14) and controlled by EN C/D |
| 14 | –IN C | Inverting input of Amp C - matched to +IN C; enables dual independent differential receivers |
| 15 | OUT C | Amplifier C output - complements Amp D for fully independent second differential pair |
| 16 | NC | No connect - internal die pad; must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers >98% of supply rail-to-rail voltage range, preserving SNR in 3.3V ADC driver designs |
| Quad amplifier with dual enable pairs | Pins 5/6 and 13/14 allow independent power control of two amplifier pairs, reducing idle power by >99% |
| Low 1.9nV/√Hz input voltage noise | Enables detection of microvolt-level bio-sensor or piezoelectric signals without added preamp stages |
| 115dB typical CMRR | Rejects common-mode interference in noisy industrial environments (e.g., motor drives, PLC I/O) |
| 60MHz GBW with unity-gain stability | Supports active filter design up to 5MHz cutoff and fast settling (<175ns to 0.1%) without external compensation |
| Specified over –40°C to 85°C | Guarantees full electrical performance in automotive cabin, industrial control, and outdoor medical equipment |
Applications
| Ultrasound Signal Conditioning | Low-Power Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable ultrasound machines operating from 3.3V batteries. IC Role / Device Role / Timing Role: Quad LT6235IGN#PBF serves as four parallel low-noise preamplifiers, each driving a 16-bit SAR ADC channel with rail-to-rail swing. Use Value: 1.9nV/√Hz noise density and 60MHz bandwidth preserve time-of-flight resolution and contrast-to-noise ratio in B-mode imaging. | Use Scenario: Signal conditioning for 4-channel thermocouple or strain gauge measurements in handheld test equipment. IC Role / Device Role / Timing Role: LT6235IGN#PBF provides programmable-gain instrumentation amplification (via external resistors) and ADC drive buffering. Use Value: Channel matching (≤1000µV offset match) and 90dB CMRR ensure <0.1% inter-channel crosstalk and stable cold-junction compensation. |
| Rail-to-Rail Sensor Interface | Active Filter for Precision Instrumentation |
Use Scenario: Direct interfacing of 0–2.5V output sensors (e.g., MEMS accelerometers, pressure transducers) to 3.3V microcontrollers. IC Role / Device Role / Timing Role: LT6235IGN#PBF configured as unity-gain buffer with V+ = 3.3V and V– = 0V, using rail-to-rail input/output. Use Value: Input common-mode range extends to 0V and 3.3V, eliminating level-shifting components and reducing BOM count. | Use Scenario: 4th-order anti-aliasing or reconstruction filtering in digital multimeters and oscilloscope front-ends. IC Role / Device Role / Timing Role: Two LT6235IGN#PBF amplifiers implement Sallen-Key stages; remaining two provide ADC drive and reference buffering. Use Value: 60MHz GBW and 17V/µs slew rate support clean 1MHz filter response with <0.01% THD+N up to 100kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8604ARUZ | Lower noise (1.2nV/√Hz), but only 8MHz GBW and no enable pin; 14-lead TSSOP package | Better for ultra-low-noise DC-coupled sensors; unsuitable for >1MHz active filters or fast-settling ADC drivers | Select AD8604ARUZ when noise dominates over speed; avoid when >5MHz bandwidth or channel shutdown is required |
| OPA4188AIDR | Zero-drift architecture (0.003µV/°C drift), 6.4MHz GBW, no enable; 14-lead SOIC package | Superior long-term DC stability for precision weigh scales; lacks speed and low-noise performance for dynamic signals | Choose OPA4188AIDR for µV-level offset drift sensitivity; reject for ultrasound or wideband data acquisition |
Compared with AD8604ARUZ and OPA4188AIDR, the LT6235IGN#PBF uniquely balances 60MHz bandwidth, 1.9nV/√Hz noise, and dual-pair enable control in a 16-pin SSOP - making it optimal for multi-channel, battery-constrained, wideband analog front-ends where both speed and noise matter.
Availability
LT6235IGN#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable data loggers, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for LT6235IGN#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 LT6235IGN#PBF belongs to ADI's legacy Linear Technology precision op amp portfolio, engineered specifically for low-noise, low-power, rail-to-rail signal conditioning in space- and energy-constrained instrumentation systems.
FAQ
What is the maximum supply voltage for the LT6235IGN#PBF?
The LT6235IGN#PBF has an absolute maximum total supply voltage (V+ to V–) of 12.6V. Operation beyond this rating risks permanent damage. The device is fully specified from 3V to 12.6V, with guaranteed performance including 60MHz GBW and 1.9nV/√Hz noise across that range. For robust long-term reliability, Analog Devices recommends staying ≥0.3V below the 12.6V limit in production designs.
Does the LT6235IGN#PBF support true rail-to-rail input operation?
The LT6235IGN#PBF does not support rail-to-rail input common-mode range. Its input voltage range is guaranteed from 1.15V to 2.65V on 3.3V supplies and –3V to 4V on ±5V supplies - sufficient for most single-supply sensor interfaces but requiring level-shifting for 0V-referenced inputs. However, its output swings rail-to-rail (within 50mV of V+ and V–), which is explicitly confirmed in the datasheet's "Output Voltage Swing" specifications.
How many independent enable controls does the LT6235IGN#PBF have?
The LT6235IGN#PBF has two independent enable control pairs: pins 5/6 (EN A/B) disable amplifiers A and B simultaneously, while pins 13/14 (EN C/D) disable amplifiers C and D. Each pair reduces the corresponding amplifier's supply current to ≤1.5µA. This architecture allows flexible power management - e.g., keeping one differential pair active for monitoring while shutting down the other three channels during standby.
What is the channel-to-channel input offset voltage match specification for LT6235IGN#PBF?
For the LT6235IGN#PBF, the channel-to-channel input offset voltage match is specified as ≤1000µV over the –40°C to 85°C temperature range. This parameter reflects the maximum difference between amplifiers A and D, and between B and C, and is critical for differential applications like instrumentation amplifiers or matched filter banks where gain/phase tracking matters.
Can the LT6235IGN#PBF drive a 100Ω load effectively?
Yes, the LT6235IGN#PBF can drive a 100Ω load, delivering ±30mA output current. At ISOURCE = 10mA into 100Ω on a 3.3V supply, VOH is guaranteed ≥3.035V (i.e., within 265mV of V+); at ISINK = 10mA, VOL is ≤0.275V (within 275mV of V–). These values confirm usable headroom for driving transmission lines or low-impedance ADC inputs, though thermal derating should be verified for continuous 30mA operation.
LT6235IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 60 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.5 µA
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 1.05mA (x4 Channels)
- Current - Output / Channel:
- 55 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT6235IGN#PBF FAQ
1.How can I place an order for LT6235IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6235IGN#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 LT6235IGN#PBF reliable?
The price and inventory of LT6235IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6235IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT6235IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6235IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6235IGN#PBF?
LT6235IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6235IGN#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 LT6235IGN#PBF?
For technical support, including LT6235IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6235IGN#PBF requirements.
6.How does Aetrix verify that LT6235IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT6235IGN#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 LT6235IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT6235IGN#PBF?
All LT6235IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6235IGN#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 LT6235IGN#PBF part is unused and in its original packaging.
Return procedure for LT6235IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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