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Analog Devices Inc. LT1995IDD#PBF
- Part No.:
- LT1995IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT1995IDD#PBF.pdf
- Description:
- IC OPAMP PGA 1 CIRCUIT 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:221
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Product details
Overview
LT1995IDD#PBF from Analog Devices (formerly Linear Technology) is a high-speed, gain-selectable differential amplifier IC with internal precision resistors, configured as a difference amplifier delivering gains of 1–7, CMRR up to 79 dB, and 1000 V/µs slew rate. It operates from ±2.5V to ±15V supplies and supports video, instrumentation, and current-sense applications requiring high DC accuracy and fast transient response.
For engineers reviewing the LT1995IDD#PBF datasheet, LT1995IDD#PBF pinout, LT1995IDD#PBF application, or LT1995IDD#PBF equivalent, key selection criteria include its 10-lead DFN package, guaranteed –40°C to +85°C operation, ±15V input range, 32 MHz bandwidth at G=1, and pin-strappable gain configuration without external components.
Technical Context
The LT1995IDD#PBF integrates a high-speed op amp with eight laser-trimmed on-chip resistors (1kΩ, 2kΩ, 4kΩ) enabling precise gain setting via pin strapping. Its topology supports difference, inverting, and noninverting configurations with no external feedback components required.
It features matched resistor networks ensuring <0.3% gain error over temperature, low input offset voltage drift (≤35 µV/°C), and robust capacitive load drive capability up to 1 µF - critical for stable cable driver and ATE signal conditioning implementations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 7 in difference amplifier mode; set by connecting P1/M1, P2/M2, P4/M4 pins - eliminates external resistor matching errors |
| Slew Rate | 1000 V/µs at ±15V supply - enables clean 10V step response in ≤100 ns with 0.1% settling |
| Bandwidth | 32 MHz at G = 1 - supports high-fidelity video and wideband test signal amplification |
| CMRR | 79 dB typical at G = 1, ±15V common-mode - rejects noise in precision sensor front-ends |
| Input Offset Voltage | 1.5 mV max (DD package, ±15V) - ensures sub-mV-level DC accuracy in current sensing |
| Supply Range | ±2.5V to ±15V - compatible with industrial, automotive, and lab-grade power rails |
| Operating Temp | –40°C to +85°C - qualified for extended-temperature industrial and embedded systems |
Pinout & Package
LT1995IDD#PBF is housed in a 10-lead (3mm × 3mm) plastic DFN package with exposed pad internally connected to VS–. The package supports high thermal efficiency (θJA = 160°C/W) when the exposed pad is soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 (Pin 1) | Noninverting Gain-of-1 Input | Connects internal 4kΩ resistor to op amp noninverting input - used for G=1 difference or noninverting config |
| P2 (Pin 2) | Noninverting Gain-of-2 Input | Connects internal 2kΩ resistor - enables G=2, G=3, G=4 combinations with M2 |
| P4 (Pin 3) | Noninverting Gain-of-4 Input | Connects internal 1kΩ resistor - extends gain range to G=5–7 when combined with P1/P2 |
| VS– (Pin 4) | Negative Supply Rail | Power supply return; exposed pad tied internally to this node for thermal and electrical performance |
| REF (Pin 5) | Reference Voltage Input | Sets output DC level (e.g., ground for bipolar outputs); connects internal 4kΩ resistor to noninverting input |
| OUT (Pin 6) | Amplifier Output | Delivers ≥30 mA drive into 150Ω - suitable for driving coaxial cables and ADC inputs |
| VS+ (Pin 7) | Positive Supply Rail | Accepts up to +15V; total supply voltage limited to 36V (VS+ to VS–) |
| M4 (Pin 8) | Inverting Gain-of-4 Input | Connects internal 1kΩ resistor to op amp inverting input - pairs with P4 for differential gain |
| M2 (Pin 9) | Inverting Gain-of-2 Input | Connects internal 2kΩ resistor - used with P2 for G=2, or with P1/P4 for composite gains |
| M1 (Pin 10) | Inverting Gain-of-1 Input | Connects internal 4kΩ resistor - primary input for G=1 difference amplifier configuration |
Key Features
| Feature | Design Value |
|---|---|
| Pin-configurable gain | 73 unique noninverting gains (1–8) and 9 difference/inverting gains (1–7) - no external resistors needed |
| Laser-trimmed resistors | 0.2% max matching at 25°C, 0.3% over –40°C to +85°C - ensures stable CMRR and gain accuracy |
| High slew rate + bandwidth | 1000 V/µs slew rate and 32 MHz GBW at G=1 - preserves fast edge integrity in pulse and video signals |
| Wide input voltage range | ±15.5V at ±15V supply - accommodates overvoltage transients without clamping distortion |
| Low noise density | 14 nV/√Hz at G=4 - maintains SNR in precision analog front-ends and sensor interfaces |
| Output drive strength | ±120 mA short-circuit current - drives heavy loads including terminated 75Ω video lines |
Applications
| Video Difference Amplifier | Current Sense Amplifier |
|---|---|
Use Scenario: Differential amplification of RGB or Y/C video signals in broadcast equipment with 75Ω source/load impedance. IC Role / Device Role / Timing Role: Difference amplifier with G=2, rejecting common-mode noise on twisted-pair video lines while preserving fast rise times. Use Value: 0.06% differential gain error and 0.15° phase error ensure color fidelity; 1000 V/µs slew rate prevents sync pulse distortion. | Use Scenario: Bidirectional current measurement across shunt resistor in motor control or battery management systems. IC Role / Device Role / Timing Role: Precision difference amplifier with REF biased to mid-supply, measuring mV-level shunt voltage with high CMRR. Use Value: 79 dB CMRR rejects bus noise; ±15V input range accommodates large common-mode voltages up to ±15V. |
| Instrumentation Front-End | Automatic Test Equipment |
Use Scenario: Low-drift signal conditioning for strain gauge or thermocouple sensors in data acquisition modules. IC Role / Device Role / Timing Role: Difference amplifier with G=100 (via external gain stage) and internal precision resistors minimizing offset drift. Use Value: 10 µV/°C max VOS drift ensures stable calibration over temperature; 32 MHz bandwidth supports multiplexed high-channel-count systems. | Use Scenario: High-speed stimulus/response channel in PXI-based ATE platforms requiring programmable gain and fast settling. IC Role / Device Role / Timing Role: Pin-strapped gain amplifier with 100 ns 0.1% settling time, driving FPGA ADC inputs with minimal latency. Use Value: 9 ns propagation delay and 100 ns settling enable tight timing margins; DFN package supports dense PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8273ARZ | Fixed G=1/2 or G=1 only; lower slew rate (350 V/µs); 10-lead SOIC package | Lower bandwidth (12 MHz) limits video use; better suited for low-power sensor interfaces | Select AD8273ARZ when fixed gain and SOIC compatibility are prioritized over speed and flexibility |
| INA149IDR | Isolated high-voltage difference amplifier (±200V CM); G=1 only; 16-bit resolution, not high-speed | Designed for high-CM medical/industrial isolation; lacks pin-strappable gain and 1000 V/µs slew | Select INA149IDR only when >±200V common-mode rejection is mandatory and speed is secondary |
Compared with AD8273ARZ and INA149IDR, the LT1995IDD#PBF uniquely combines pin-strappable gain (1–7), 1000 V/µs slew rate, and DFN packaging - making it optimal for space-constrained, high-bandwidth difference amplifier designs where flexibility and speed are critical.
Availability
LT1995IDD#PBF is available at Aetrix Electronics and suitable for video signal conditioning, precision current sensing, instrumentation front-ends, and automatic test equipment requiring stable component supply across extended temperature ranges.
Supply support for LT1995IDD#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 acquired Linear Technology in 2017 and maintains its high-performance analog portfolio, emphasizing precision, speed, and reliability in signal conditioning ICs.
The LT1995 product line was designed for high-fidelity, high-speed difference amplification in demanding applications such as video, ATE, and industrial instrumentation - where internal resistor matching and fast settling are essential.
FAQ
What is the maximum operating temperature range for the LT1995IDD#PBF?
The LT1995IDD#PBF is rated for continuous operation from –40°C to +85°C, with full electrical specifications guaranteed across this range. Its DFN package includes an exposed pad tied to VS–, and thermal performance improves significantly when this pad is soldered to a large PCB copper area - reducing θJA to ~50°C/W.
How does the LT1995IDD#PBF achieve gain selection without external resistors?
The LT1995IDD#PBF achieves gain selection using eight internal laser-trimmed thin-film resistors (1kΩ, 2kΩ, 4kΩ) connected to dedicated pins (P1/P2/P4 and M1/M2/M4). By strapping specific combinations of these pins to VS+ or VS–, users configure difference, inverting, or noninverting gains - all without external components.
Can the LT1995IDD#PBF be used in single-supply applications?
Yes, the LT1995IDD#PBF supports single-supply operation via AC coupling and REF biasing. For example, tying REF to VCC/2 establishes a mid-rail output quiescent point. Input common-mode range extends to within 1.5V of the rails, and the device maintains specified performance down to ±2.5V total supply (5V single-ended).
What is the typical common-mode rejection ratio (CMRR) of the LT1995IDD#PBF at G = 1?
The LT1995IDD#PBF delivers a typical CMRR of 79 dB at G = 1 and ±15V supply, with a minimum of 65 dB over temperature and supply variations. This performance stems from precise on-chip resistor matching (0.2% max at 25°C), making it suitable for high-noise environments like motor drives and industrial sensor interfaces.
Does the LT1995IDD#PBF require external compensation for stability?
No, the LT1995IDD#PBF is unity-gain stable and requires no external compensation. It maintains phase margin >45° into 100 pF loads and remains stable with capacitive loads up to 1 µF - verified in typical performance curves (Figures G28–G29). This simplifies layout in video and cable-driving applications.
LT1995IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Programmable Gain
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1000V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 32 MHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 750 µV
- Current - Supply:
- 7.1mA
- Current - Output / Channel:
- 120 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LT1995IDD#PBF FAQ
1.How can I place an order for LT1995IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1995IDD#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 LT1995IDD#PBF reliable?
The price and inventory of LT1995IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1995IDD#PBF is usually 5 days.
3.What payment methods are accepted for LT1995IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1995IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1995IDD#PBF?
LT1995IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1995IDD#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 LT1995IDD#PBF?
For technical support, including LT1995IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1995IDD#PBF requirements.
6.How does Aetrix verify that LT1995IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT1995IDD#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 LT1995IDD#PBF meets industry standards.
7.What is the process for return or replacement of LT1995IDD#PBF?
All LT1995IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1995IDD#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 LT1995IDD#PBF part is unused and in its original packaging.
Return procedure for LT1995IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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