Analog Devices Inc. LT1464CS8

Overview

LT1464CS8 from Analog Devices (formerly Linear Technology) is a dual micropower JFET-input operational amplifier optimized for ultra-low input bias current (≤20 pA max), 1 MHz gain bandwidth, and unity-gain stability with capacitive loads up to 10 nF. It operates from ±5 V or ±15 V supplies, delivers ±13.7 V output swing into 10 kΩ, and targets precision photocurrent amplification, low-droop track-and-hold circuits, and battery-powered sensor front-ends.

For engineers reviewing the LT1464CS8 datasheet, LT1464CS8 pinout, LT1464CS8 application, or LT1464CS8 equivalent, key selection criteria include verified picoampere-level input bias current over temperature, guaranteed slew rate (0.5 V/µs min), C-load drive capability, matching specifications between amplifiers, and SO-8 package compatibility with legacy layouts.

Technical Context

The LT1464CS8 employs matched JFET input stages with differential pair topology enabling ≤20 pA input bias current and 0.5 mV input offset voltage (max). Its internal compensation ensures unity-gain stability with 10 nF capacitive loads-critical for peak detector and filter applications where phase reversal must be avoided.

It features rail-to-rail input common-mode range including the positive supply rail, 85 dB CMRR, and 90 dB PSRR, supporting high-impedance signal conditioning in single-supply-derived bipolar systems. All electrical specs-including GBW (650 kHz min), slew rate, and supply current-are 100% tested across ±5 V and ±15 V operation.

Key Specifications

Pinout & Package

LT1464CS8 is housed in an 8-lead plastic SOIC (SO-8) package, 0.150-inch body width, with standard dual op amp pinout compatible with industry layout practices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual JFET-input op amp applications.

Compared with LT1464ACS8, the LT1464CS8 trades lower bias current and tighter matching for broader availability and lower cost; versus LT1462CS8, it delivers 5.7× higher bandwidth and 10× lower input bias current at the expense of 7× higher supply current-making it optimal for precision, moderate-speed, low-power systems.

Availability

LT1464CS8 is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision photocurrent amplification, and low-droop track-and-hold circuits requiring stable component supply across industrial temperature ranges.

Supply support for LT1464CS8 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 precision analog portfolio, emphasizing high-performance op amps, references, and signal conditioning ICs for demanding industrial and instrumentation markets.

The LT1464CS8 belongs to Linear Technology's C-Load™ op amp family, designed specifically for applications requiring unity-gain stability with large capacitive loads and ultra-low input bias current-targeting sensor interfaces, medical devices, and portable test equipment.

FAQ

What is the maximum input bias current specification for LT1464CS8 over temperature?

The LT1464CS8 has a maximum input bias current of 20 pA at ±15 V supplies across the full operating temperature range of –40°C to 85°C. This value is guaranteed and tested per the datasheet's extended temperature characterization, making it suitable for high-impedance applications like photodiode amplification where leakage must remain below 20 pA even under worst-case thermal conditions. The LT1464CS8 achieves this using matched JFET input pairs with optimized process control.

Does LT1464CS8 support ±5 V operation, and how does performance differ from ±15 V?

Yes, LT1464CS8 is fully specified and guaranteed for ±5 V operation. At ±5 V, supply current remains ≤200 µA per amplifier, input bias current is ≤20 pA, and output swing reaches ±3.7 V into 2 kΩ. Gain bandwidth drops slightly to 870 kHz (min), and slew rate is 0.8 V/µs (min), but all key parameters-including C-load stability up to 10 nF and rail-inclusive input range-remain fully functional. This dual-supply flexibility allows use in compact, low-voltage portable systems without performance compromise.

Can LT1464CS8 drive a 10 nF capacitor directly in a peak detector without external components?

Yes, the LT1464CS8 is explicitly designed and tested for unity-gain stability with up to 10 nF capacitive loads, as confirmed in the datasheet's TPC13 and TA01 application diagrams. In peak detector configurations, it eliminates the need for series isolation resistors that introduce droop and noise. The LT1464CS8's internal compensation and low-output impedance ensure stable hold behavior with measured droop as low as 0.05 mV/s-enabling accurate DC-coupled signal capture in precision measurement systems.

What are the matching specifications between the two amplifiers in LT1464CS8?

The LT1464CS8 provides guaranteed matching between its dual amplifiers: offset voltage match ≤3.3 mV, non-inverting input bias current match ≤30 pA, CMRR match ≥72 dB, and PSRR match ≥73 dB-all tested at ±15 V and –40°C to 85°C. These values enable high-accuracy differential configurations, such as precision instrumentation amplifiers or matched gain stages, without requiring external trimming. Matching is defined as the absolute difference between amplifier A and B, per Note 7 in the datasheet.

Is LT1464CS8 pin-compatible with other SO-8 dual op amps like OP27 or TL072?

No, LT1464CS8 uses a non-standard SO-8 pinout: pins 1–3 and 6–8 are assigned to amplifier B and A respectively, with V+ on pin 5 and V– on pin 4-unlike TL072 (V+ on pin 8, V– on pin 4) or OP27 (V+ on pin 7, V– on pin 4). Substituting LT1464CS8 into existing layouts requires PCB revision. Always verify pin mapping against the SO-8 top view diagram in the LT1464/LT1465 datasheet before integration.