Analog Devices Inc. LTC6087HDD#TRPBF

Overview

LTC6087HDD#TRPBF from Analog Devices is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for high-impedance sensor signal conditioning. It delivers 14MHz gain bandwidth, 7.2V/µs slew rate, 12nV/√Hz input noise density at 1kHz, ±750µV max offset voltage over –40°C to 125°C, and 1pA typical input bias current at 25°C - enabling precision amplification in portable medical sensors and low-power data acquisition systems.

For engineers reviewing the LTC6087HDD#TRPBF datasheet, LTC6087HDD#TRPBF pinout, LTC6087HDD#TRPBF application, or LTC6087HDD#TRPBF equivalent, key selection criteria include guaranteed H-grade temperature operation (–40°C to 125°C), shutdown capability per channel, DFN-10 package thermal performance (θJA = 43°C/W), and verified rail-to-rail swing within 30mV of supply rails under no-load conditions.

Technical Context

The LTC6087HDD#TRPBF employs complementary PMOS/NMOS input pairs to achieve true rail-to-rail input common-mode range (V– to V+), with seamless transition between input stages near 0.9V–1.3V below V+. Its class AB output stage supports 45mA short-circuit current while maintaining 30mV rail proximity under high-impedance loads.

Shutdown control is implemented via two dedicated active-low pins (SHDNA, SHDNB) - unique to the DD package - enabling independent channel disable with <5µA per amplifier quiescent current. The exposed pad (Pin 11) is internally connected to V– and must be soldered to PCB ground for thermal and electrical integrity.

Key Specifications

Pinout & Package

The LTC6087HDD#TRPBF is housed in a 10-lead (3mm × 3mm) plastic DFN package with exposed thermal pad (Pin 11) connected to V–. This leadless package offers θJA = 43°C/W and requires soldering the exposed pad to PCB ground plane for thermal management and optimal EMI performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op-amp applications.

Compared with LTC6078HMS8#TRPBF, LTC6087HDD#TRPBF trades 40% higher supply current for 9.3× greater bandwidth and 70% lower 1/f noise; versus LTC6242HDD#TRPBF, it sacrifices 30% noise density to achieve 10× lower input bias current - making it uniquely suited for femtoamp-level electrochemical sensing.

Availability

LTC6087HDD#TRPBF is available at Aetrix Electronics and suitable for portable test equipment, medical sensor modules, and industrial vibration monitoring systems requiring stable component supply across extended temperature ranges.

Supply support for LTC6087HDD#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC6087 series belongs to Linear's precision rail-to-rail op-amp product line, designed specifically for low-power, high-accuracy sensor signal conditioning in battery-operated and harsh-environment applications.

FAQ

What is the maximum operating temperature range guaranteed for LTC6087HDD#TRPBF?

The LTC6087HDD#TRPBF is specified for continuous operation from –40°C to 125°C, with all key parameters (offset voltage, bias current, CMRR, PSRR) guaranteed across this full industrial-plus range. This H-grade qualification makes LTC6087HDD#TRPBF suitable for under-hood automotive and industrial control applications where ambient temperatures exceed 85°C.

Does LTC6087HDD#TRPBF support true rail-to-rail input and output operation?

Yes, LTC6087HDD#TRPBF provides true rail-to-rail input common-mode range (V– to V+) and rail-to-rail output swing within 30mV of both supply rails under no-load conditions. Input stage uses complementary PMOS/NMOS pairs to maintain high CMRR across the full range, while the class AB output stage delivers 45mA short-circuit current while preserving low-voltage headroom.

How does the shutdown feature work on LTC6087HDD#TRPBF?

LTC6087HDD#TRPBF implements independent active-low shutdown via SHDNA (Pin 5) and SHDNB (Pin 6). When pulled below 0.8V, each amplifier enters shutdown drawing <5µA total current. Pins float to V+ via internal current sources, so no external pull-ups are needed. Output becomes high-impedance, enabling muxed-output architectures as shown in the datasheet Figure 3.

What is the recommended PCB layout practice for minimizing input bias current errors in LTC6087HDD#TRPBF?

To preserve the 1pA input bias current specification, avoid flux residue under the DFN-10 package - which connects the exposed pad to V– and can create leakage paths. Use a guard ring around +IN/–IN traces, driven at the same potential as the input (e.g., output in unity-gain buffer), and ensure ≥100GΩ surface insulation resistance between high-impedance nodes and adjacent supply or ground planes.

Can LTC6087HDD#TRPBF drive capacitive loads without instability?

LTC6087HDD#TRPBF is stable driving up to 100pF in unity-gain configuration. For larger capacitive loads (e.g., ADC input capacitance), add a small series resistor (10–50Ω) between output and load to isolate the capacitance from the op-amp's output stage. Phase margin remains >45° with 100pF load and 5pF compensation capacitor, as verified in Typical Performance Characteristic Figure G11.