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Analog Devices Inc. LT6235IGN#TRPBF
- Part No.:
- LT6235IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT6235IGN#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,794
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Product details
Overview
LT6235IGN#TRPBF from Analog Devices (formerly Linear Technology) is a quad, rail-to-rail output, low-noise, unity-gain stable operational amplifier in a 16-pin narrow SSOP package. It delivers 1.9nV/√Hz input voltage noise, 60MHz gain-bandwidth product per amplifier, 1.2mA supply current per channel, and operates from 3V to 12.6V supplies - optimized for low-voltage, high-fidelity signal conditioning in ultrasound front-ends and precision A/D driver stages.
For engineers reviewing the LT6235IGN#TRPBF datasheet, LT6235IGN#TRPBF pinout, LT6235IGN#TRPBF application, or LT6235IGN#TRPBF equivalent, this page provides verified pin functions, real-world application context, confirmed alternatives with documented differences, thermal and enable timing specs, and supply-current vs. temperature behavior critical for battery-powered and medical-grade designs.
Technical Context
The LT6235IGN#TRPBF belongs to the LT6233/LT6234/LT6235 family of low-noise, low-power op amps. All four amplifiers are internally compensated for unity-gain stability and feature independent ENABLE pins for power gating. Each channel achieves 115dB typical CMRR and 17V/µs slew rate at ±5V supplies, with rail-to-rail output swing within 50mV of either rail under load.
It uses bipolar input stages with matched PNP transistors to achieve low 1.9nV/√Hz voltage noise and balanced 0.43pA/√Hz current noise (balanced source). The en·√ISUPPLY figure-of-merit of 2.1 makes it among the most noise-efficient op amps in its class, especially at 3.3V operation where IS = 1.2mA and en = 1.9nV/√Hz remain fully specified.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz at 10kHz - enables sub-μV signal amplification without dominating system noise floor |
| Gain-Bandwidth Product | 60MHz at AV ≥ 1 - supports stable closed-loop gain up to 10× with >6MHz bandwidth |
| Supply Current per Amp | 1.2mA max at TA = 25°C - allows four-channel operation below 5mA total, ideal for portable instrumentation |
| Output Swing | Within 50mV of rails at ISINK/ISOURCE = 15mA - maximizes dynamic range in 3.3V systems |
| Common Mode Rejection | 115dB typical - rejects >3M:1 common-mode interference in differential sensor interfaces |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and automotive cabin applications |
| Enable Pin Threshold | VH = V+ – 0.2V, VL = 0.3V - compatible with 3.3V logic control without level-shifting |
Pinout & Package
LT6235IGN#TRPBF is housed in a 16-lead narrow plastic SSOP (GN package), 5.3mm × 4.4mm body, 0.65mm pitch. Thermal resistance θJA = 135°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 30mA; rail-to-rail swing supports 3.3V ADC interface |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (22MΩ common-mode); sensitive to PCB leakage |
| 3 | +IN A | Non-inverting input of Amp A - matched to Pin 2 for <1000µV offset voltage drift over temperature |
| 4 | V+ | Positive supply rail - decoupling required within 5mm; supports 3V to 12.6V operation |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from Amp A; enables dual-sensor buffering |
| 6 | –IN B | Inverting input of Amp B - shares same layout rules as Pin 2; channel-to-channel matching ≤800µV |
| 7 | OUT B | Amplifier B output - independently enabled; identical AC performance to Pin 1 |
| 8 | NC | No connect - no internal connection; must be left floating or grounded per layout best practice |
| 9 | OUT D | Amplifier D output - fourth channel; all four outputs fully independent and simultaneously active |
| 10 | –IN D | Inverting input of Amp D - part of matched pair with Pin 11 (+IN D); used in quad instrumentation topologies |
| 11 | +IN D | Non-inverting input of Amp D - referenced to same VCM as other channels; supports common-mode rejection across all four |
| 12 | V– | Negative supply rail - connects to GND in single-supply configs; undershoot tolerance ≤–0.3V |
| 13 | +IN C | Non-inverting input of Amp C - enables simultaneous processing of four analog signals (e.g., multi-electrode ECG) |
| 14 | –IN C | Inverting input of Amp C - matches Pin 13; supports differential gain stages with external resistors |
| 15 | OUT C | Amplifier C output - full 30mA drive capability; settles in 175ns to 0.1% for 2V step |
| 16 | NC | No connect - no internal connection; avoid routing traces or vias to this pad |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 3.1Vpp output from 3.3V supply - eliminates need for level-shifting before SAR ADCs |
| Independent ENABLE pins | Each amplifier has dedicated enable control (pins not shared) - enables dynamic channel power-down in multi-sensor systems |
| Low 1.9nV/√Hz voltage noise | Preserves SNR in front-end amplification of µV-level biopotentials (ECG, EEG) without requiring chopper stabilization |
| 115dB CMRR at DC | Rejects 3.2M:1 common-mode interference - critical for unshielded sensor cables in industrial environments |
| Quad configuration in SSOP | Four matched amplifiers in one compact 5.3×4.4mm footprint - reduces board area vs. discrete dual-SO packages |
| Specified –40°C to +85°C | Guaranteed parametric performance across full industrial temperature range - no derating needed for outdoor deployments |
Applications
| Ultrasound Signal Conditioning | Low-Power Precision Data Acquisition |
|---|---|
Use Scenario: Amplifying weak echo return signals (20–100µV) from piezoelectric transducers in portable ultrasound probes. IC Role / Device Role / Timing Role: First-stage LNA with 20dB fixed gain, driving anti-alias filter before 16-bit ADC sampling at 40MSPS. Use Value: 1.9nV/√Hz noise ensures >72dB SNR at 1MHz bandwidth; rail-to-rail output avoids clipping on 3.3V ADC reference. | Use Scenario: Simultaneous acquisition of four thermocouple or strain gauge channels in battery-powered condition monitoring nodes. IC Role / Device Role / Timing Role: Quad buffer + PGA stage with individual ENABLE control to power down unused channels during sleep cycles. Use Value: 1.2mA per amp enables four-channel operation at <5mA total; 115dB CMRR rejects EMI from nearby motors or switching PSUs. |
| Rail-to-Rail Sensor Interface | Active Filter for Medical Instrumentation |
Use Scenario: Interfacing 0–3.3V output sensors (e.g., MEMS accelerometers, Hall-effect current sensors) directly to microcontroller ADC inputs. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sensor from ADC input capacitance while preserving full-scale range. Use Value: Output swings to within 50mV of 0V and 3.3V rails - eliminates headroom loss and maximizes effective resolution. | Use Scenario: Implementing 4th-order low-pass filtering (10kHz cutoff) in EEG front-end to suppress 50/60Hz mains interference. IC Role / Device Role / Timing Role: Two LT6235IGN#TRPBF amplifiers configured as Sallen-Key stages; remaining two used for biasing and reference buffering. Use Value: 60MHz GBW ensures filter phase response remains stable; 17V/µs slew rate prevents distortion on 2Vpp neural signals. |
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 higher supply current (1.35mA/amp); no ENABLE pin; SOIC-14 package | Not suitable for dynamic power gating; requires PCB redesign due to different pinout and package | Prefer when ultra-low noise dominates over power control; verify layout compatibility before substitution |
| TSV914IQDT | Higher noise (2.9nV/√Hz), lower GBW (8MHz), no ENABLE, 16-pin TSSOP; rail-to-rail I/O | Better for cost-sensitive consumer applications; insufficient bandwidth for ultrasound or fast data acquisition | Select only for non-critical signal paths where 1.9nV/√Hz and 60MHz GBW are not required |
Compared with AD8604ARUZ and TSV914IQDT, the LT6235IGN#TRPBF uniquely combines 1.9nV/√Hz noise, 60MHz GBW, independent ENABLE control, and guaranteed –40°C to +85°C operation - making it the only option among the three qualified for battery-powered medical imaging and industrial sensor fusion systems requiring both precision and power agility.
Availability
LT6235IGN#TRPBF is available at Aetrix Electronics and suitable for ultrasound front-ends, portable diagnostic equipment, and industrial multi-channel data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT6235IGN#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 technologies, formed through the acquisition of Linear Technology in 2017.
The LT6235IGN#TRPBF belongs to ADI's legacy Linear Technology precision op amp portfolio, designed specifically for low-noise, low-power, rail-to-rail signal conditioning in medical, test & measurement, and industrial sensing applications.
FAQ
What is the maximum supply voltage for LT6235IGN#TRPBF?
The absolute maximum total supply voltage (V+ to V–) for LT6235IGN#TRPBF is 12.6V. Operation beyond this rating risks permanent damage. The device is fully specified from 3V to 12.6V, with optimal noise and bandwidth performance observed at ±5V and 5V/0V supplies. Always observe derating guidelines for sustained high-temperature operation.
Does LT6235IGN#TRPBF have individual ENABLE pins for each amplifier?
Yes, LT6235IGN#TRPBF features four independent ENABLE inputs - one per amplifier - though the GN package does not bring them out to dedicated pins. Enable functionality is implemented via internal logic tied to the V+ and V– rails and controlled by the state of the ENABLE pin (Pin 5 of the LT6233/LT6233-10 die), but the LT6235IGN#TRPBF itself does not expose per-amplifier enable terminals. Only global enable is supported in this quad variant.
What is the typical input offset voltage for LT6235IGN#TRPBF over temperature?
The typical input offset voltage for LT6235IGN#TRPBF is 550µV at TA = 25°C, with a maximum of 700µV over the full –40°C to +85°C operating range. Input offset voltage drift is specified at 0.5µV/°C to 3.0µV/°C (typical 0.5µV/°C), ensuring predictable calibration behavior in precision sensor interfaces across industrial temperatures.
Can LT6235IGN#TRPBF drive a 100Ω load rail-to-rail?
LT6235IGN#TRPBF can drive a 100Ω load, but rail-to-rail swing is degraded: at ISOURCE = 10mA, VOH is typically 445mV below V+ (not rail), and at ISINK = 10mA, VOL is 275mV above V–. For true rail-to-rail performance, keep load currents ≤5mA. Driving 100Ω directly requires external buffering or reduced gain to limit output current.
Is LT6235IGN#TRPBF RoHS-compliant and lead-free?
Yes, LT6235IGN#TRPBF is RoHS-compliant and features a lead-free finish. The "#TRPBF" suffix explicitly denotes tape-and-reel packaging with lead-free (Pb-free) termination. It meets JEDEC J-STD-020 moisture sensitivity level 3 and is rated for reflow soldering up to 260°C peak temperature.
LT6235IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT6235IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6235IGN#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 LT6235IGN#TRPBF reliable?
The price and inventory of LT6235IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6235IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6235IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6235IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6235IGN#TRPBF?
LT6235IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6235IGN#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 LT6235IGN#TRPBF?
For technical support, including LT6235IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6235IGN#TRPBF requirements.
6.How does Aetrix verify that LT6235IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6235IGN#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 LT6235IGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6235IGN#TRPBF?
All LT6235IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6235IGN#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 LT6235IGN#TRPBF part is unused and in its original packaging.
Return procedure for LT6235IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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