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Analog Devices Inc. LT1804IDD#TRPBF
- Part No.:
- LT1804IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT1804IDD#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
LT1804IDD#TRPBF from Analog Devices (formerly Linear Technology) is a dual rail-to-rail input and output operational amplifier optimized for high-speed, low-voltage signal conditioning. It delivers 100 V/µs slew rate, 85 MHz gain bandwidth product, 21 nV/√Hz input voltage noise, ±42 mA output drive, and operates from 2.3 V to 12.6 V supply rails - enabling precision buffering in ADC front-ends and video line drivers.
For engineers reviewing the LT1804IDD#TRPBF datasheet, LT1804IDD#TRPBF pinout, LT1804IDD#TRPBF application, or LT1804IDD#TRPBF equivalent, key selection criteria include guaranteed –40°C to +85°C operation, DFN-8 package thermal performance (θJA = 160°C/W), rail-to-rail swing within 20 mV of supplies, and channel-to-channel matching specs for dual-amplifier coherence.
Technical Context
The LT1804IDD#TRPBF integrates two independent high-speed op amps on a proprietary complementary bipolar process, featuring dual-input-stage architecture: PNP pair active near negative rail and NPN pair active near positive rail, enabling true rail-to-rail common-mode input range (VCM = VS– to VS+). Output stage uses complementary common-emitter transistors with local feedback capacitors to achieve rail-to-rail swing and low output impedance.
It supports single-supply (2.3 V to 12.6 V) and split-supply (±2.5 V to ±5 V) operation, maintains stability driving capacitive loads up to 1000 pF with series resistor compensation, and exhibits 90 dB PSRR and 96 dB CMRR at DC - critical for noise-sensitive mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 100 V/µs - enables clean 2 VP-P signal reproduction up to ~8 MHz without slewing distortion. |
| Gain Bandwidth Product | 85 MHz - supports stable unity-gain and moderate closed-loop gains (e.g., G = 10 up to 8.5 MHz). |
| Input Voltage Noise | 21 nV/√Hz at 10 kHz - suitable for medium-bandwidth sensor interfaces and post-filter amplification. |
| Output Current | ±42 mA - drives 150 Ω video loads or 100 Ω A/D converter inputs without external buffers. |
| Supply Range | 2.3 V to 12.6 V total - operates from single 3.3 V or 5 V rails, or ±5 V supplies, with no performance degradation. |
| Input Common-Mode Range | VS– to VS+ - accepts signals at either supply rail, eliminating level-shifting in low-voltage data acquisition. |
| Output Swing | Within 20 mV of VS– and VS+ at light load - maximizes dynamic range in 3.3 V systems with 12-bit+ ADCs. |
Pinout & Package
LT1804IDD#TRPBF is housed in an 8-lead 3 mm × 3 mm plastic DFN package with underside metal pad internally connected to V–. The exposed pad improves thermal dissipation (θJA = 160°C/W) and must be soldered to PCB ground plane for optimal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Delivers rail-to-rail buffered signal; capable of sourcing/sinking ±42 mA. |
| 2: –IN A | Inverting input A | Differential node for A amplifier; matched to +IN A for <6.5 mV offset voltage drift over temperature. |
| 3: +IN A | Non-inverting input A | Differential node for A amplifier; supports common-mode input down to VS–. |
| 4: V– | Negative supply / ground reference | Power return path; underside metal pad is internally tied to this pin for thermal and electrical grounding. |
| 5: V+ | Positive supply | Accepts 2.3 V to 12.6 V total supply; PSRR >86 dB ensures immunity to supply ripple. |
| 6: OUT B | Amplifier B output | Independent output identical to OUT A; channel-to-channel gain match ≤0.1 dB at 1 MHz. |
| 7: –IN B | Inverting input B | Differential node for B amplifier; matched to –IN A for <9 mV channel-to-channel offset voltage (DD package). |
| 8: +IN B | Non-inverting input B | Differential node for B amplifier; shares same rail-to-rail input architecture as +IN A. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling in 3.3 V systems without external level shifters or clamps. |
| Low input bias current (125 nA typ) | Preserves accuracy in high-impedance sensor interfaces (e.g., piezoelectric, photodiode transimpedance). |
| High PSRR (90 dB) and CMRR (96 dB) | Reduces sensitivity to power supply noise and common-mode interference in noisy industrial environments. |
| Stable with capacitive loads up to 1000 pF | Eliminates need for isolation resistors when driving ADC input capacitance or long PCB traces. |
| –40°C to +85°C guaranteed operation | Validated performance across industrial temperature range without derating or thermal management overhead. |
Applications
| ADC Driver | Video Line Driver |
|---|---|
|
Use Scenario: Driving the input of a 12-bit SAR ADC with 1 MSPS sampling rate in a portable medical sensor. IC Role / Device Role / Timing Role: Buffer and level-shift analog sensor output to match ADC reference range while maintaining SNR. Use Value: 21 nV/√Hz noise and rail-to-rail swing preserve effective resolution; 100 V/µs slew rate settles 2 V step in <350 ns (0.01%). |
Use Scenario: Transmitting composite NTSC video over 75 Ω coaxial cable in security camera systems. IC Role / Device Role / Timing Role: Active buffer and driver delivering 2 VP-P into 75 Ω load with minimal group delay. Use Value: 0.15% differential gain and 1° differential phase error ensure color fidelity; ±42 mA output sustains 26.7 mA load current. |
| Rail-to-Rail Sensor Interface | Active Filter Stage |
|
Use Scenario: Amplifying output of a 0–3.3 V pressure transducer in automotive cabin air quality monitoring. IC Role / Device Role / Timing Role: Precision gain stage with zero-volt input capability and minimal offset drift. Use Value: Input common-mode range includes VS–, enabling direct connection to grounded sensors; 10 µV/°C offset drift minimizes calibration frequency. |
Use Scenario: Implementing 4th-order Sallen-Key anti-aliasing filter preceding a high-speed ADC in test equipment. IC Role / Device Role / Timing Role: Dual-op-amp topology realizing two 2nd-order stages in one package. Use Value: 85 MHz GBW supports filter cutoffs up to 10 MHz; matched channel parameters ensure consistent pole placement between stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4897-2ARMZ | Lower noise (1 nV/√Hz), lower supply current (1.2 mA/amplifier), but narrower GBW (225 MHz) and no guaranteed –40°C to +85°C operation in MSOP-8. | Better suited for ultra-low-noise preamp stages; less ideal for wide-temp industrial ADC drivers due to limited temp spec. | Select ADA4897-2ARMZ only if noise dominates design requirements and ambient temperature stays within 0°C to 70°C. |
| OPA2350UA/2K5 | Similar rail-to-rail I/O and 36 V/µs slew rate, but lower GBW (38 MHz), higher input bias current (0.5 pA), and SO-8 only (no DFN option). | Cost-effective for lower-frequency (<5 MHz) instrumentation; lacks thermal performance and speed needed for video or fast ADC buffering. | Choose OPA2350UA/2K5 for budget-constrained, non-thermal-critical designs where 38 MHz GBW suffices. |
Compared with ADA4897-2ARMZ and OPA2350UA/2K5, the LT1804IDD#TRPBF uniquely balances 100 V/µs slew rate, 85 MHz GBW, –40°C to +85°C guarantee, and DFN-8 thermal efficiency - making it the preferred choice for space-constrained, wide-temperature, high-fidelity signal chain nodes.
Availability
LT1804IDD#TRPBF is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, medical data acquisition, and broadcast video interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1804IDD#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs for precision, power, and connectivity applications.
The LT1804IDD#TRPBF belongs to Linear's legacy high-speed precision op amp family, designed specifically for demanding signal integrity applications including data conversion interfaces, video systems, and real-time control loops where speed, accuracy, and rail-to-rail operation are co-required.
FAQ
What is the maximum operating junction temperature for LT1804IDD#TRPBF?
The absolute maximum junction temperature for LT1804IDD#TRPBF is 150°C. Its DFN-8 package has θJA = 160°C/W with standard PCB layout, but thermal performance improves significantly when the underside metal pad is soldered to a large copper area - reducing θJA to ~50°C/W. For continuous operation at full output current, ambient temperature must be limited per TJ = TA + (PD × θJA); LT1804IDD#TRPBF datasheet provides detailed power dissipation examples.
Does LT1804IDD#TRPBF support single-supply operation below 3 V?
Yes, LT1804IDD#TRPBF is fully specified down to 2.3 V total supply voltage (e.g., 2.3 V single-ended or ±1.15 V split). At 2.5 V supply, it maintains rail-to-rail input/output swing, 65 V/µs slew rate, and 40 MHz GBW - validated across the –40°C to +85°C range. This makes LT1804IDD#TRPBF suitable for battery-powered IoT sensors and wearables using Li-ion or coin-cell sources.
How does the dual-input-stage architecture affect LT1804IDD#TRPBF's input offset voltage?
LT1804IDD#TRPBF uses PNP and NPN input stages that activate sequentially across the common-mode range: PNP dominates near VS– (offset <1 mV), NPN dominates near VS+ (offset up to 9 mV). This causes a discontinuity in offset vs. VCM curve - documented in Figure G06 of the datasheet. Designers should avoid operating near the transition zone (~1.3 V below VS+) in precision DC applications; LT1804IDD#TRPBF's typical offset remains <4 mV over most of its input range.
Can LT1804IDD#TRPBF drive a 100 Ω load at 5 V supply without external components?
Yes, LT1804IDD#TRPBF delivers ±42 mA output current and swings within 200 mV of each rail at 15 mA sink/source - sufficient to drive a 100 Ω load to ±1.5 V with 3 V headroom. At 5 V supply, it sustains ±1.3 V output into 100 Ω with <0.1% THD at 100 kHz. No series resistor or external boost circuitry is required, though thermal design must account for 0.095 W per amplifier under worst-case conditions.
Is LT1804IDD#TRPBF pin-compatible with other packages in the LT1803/LT1804/LT1805 family?
No - LT1804IDD#TRPBF (DFN-8) uses a different pinout than LT1804CS8 (SO-8). In DFN-8, pins 4 and 5 are V– and V+, respectively; in SO-8, V– is pin 4 and V+ is pin 8. Signal pins (OUT A, –IN A, +IN A, OUT B, –IN B, +IN B) occupy different positions. Direct PCB replacement requires layout revision. Always verify against the specific package drawing: DD for DFN-8, S8 for SO-8, and consult LT1804IDD#TRPBF's official pin map before board design.
LT1804IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 100V/µs
- Gain Bandwidth Product:
- 83 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2.5 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 2.5mA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LT1804IDD#TRPBF FAQ
1.How can I place an order for LT1804IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1804IDD#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 LT1804IDD#TRPBF reliable?
The price and inventory of LT1804IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1804IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1804IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1804IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1804IDD#TRPBF?
LT1804IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1804IDD#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 LT1804IDD#TRPBF?
For technical support, including LT1804IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1804IDD#TRPBF requirements.
6.How does Aetrix verify that LT1804IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1804IDD#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 LT1804IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1804IDD#TRPBF?
All LT1804IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1804IDD#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 LT1804IDD#TRPBF part is unused and in its original packaging.
Return procedure for LT1804IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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