Analog Devices Inc. LTC1605AIG#PBF

Overview

LTC1605AIG#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 100ksps successive-approximation analog-to-digital converter with internal 2.5V reference, ±10V bipolar input range, and parallel 16-bit two's-complement output. It operates from a single 5V supply, draws 11–16mA, and targets high-accuracy industrial data acquisition where guaranteed no-missing-codes and ±2.0LSB INL over temperature are required.

For engineers reviewing the LTC1605AIG#PBF datasheet, LTC1605AIG#PBF pinout, LTC1605AIG#PBF application, or LTC1605AIG#PBF equivalent, key selection considerations include its 28-lead SSOP package, –40°C to +85°C industrial temperature grade, internal synchronized clock, BUSY/CS/R/C control interface, and compatibility with FIFOs, DSPs, and microprocessors via parallel bus timing.

Technical Context

The LTC1605AIG#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, precision bandgap reference, and trimmed internal clock-eliminating external timing components. Its analog front-end features 20kΩ input impedance, ±25V overvoltage protection, and dual analog ground pins (AGND1, AGND2) for noise isolation.

Digital interface supports 16-bit word or byte-mode reads via BYTE pin, with CS and R/C jointly controlling conversion start and data validity. BUSY output signals conversion progress, and all digital outputs are three-state with Hi-Z enabled by CS high or R/C low-enabling direct connection to shared buses without external latches.

Key Specifications

Pinout & Package

Package: 28-lead plastic SSOP (G package), exposed pad soldered to PCB ground for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS7805UB and AD976ARZ, the LTC1605AIG#PBF delivers plug-and-play parallel interfacing with zero external timing components and guaranteed monotonicity-making it optimal for deterministic, low-latency industrial acquisition where board space and firmware resources are constrained.

Availability

LTC1605AIG#PBF is available at Aetrix Electronics and suitable for industrial process control, multiplexed sensor acquisition, and PC-based high-speed data acquisition requiring stable component supply across extended temperature ranges.

Supply support for LTC1605AIG#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC1605AIG#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for high-accuracy, low-noise, single-supply operation in demanding industrial instrumentation and control applications.

FAQ

What is the operating temperature range of the LTC1605AIG#PBF?

The LTC1605AIG#PBF is rated for –40°C to +85°C ambient operation, qualifying it for industrial environments including factory automation, motor drives, and outdoor instrumentation enclosures. This grade is confirmed in the "ORDER INFORMATION" table under the "AIG" suffix and matches the LTC1605I specification.

Does the LTC1605AIG#PBF require an external clock source?

No, the LTC1605AIG#PBF includes a factory-trimmed internal clock enabling guaranteed 100ksps operation without external timing components. The internal clock drives both the sample-and-hold and SAR logic, and its synchronization eliminates setup/hold timing concerns associated with external clocks.

How does the BYTE pin affect data output formatting on the LTC1605AIG#PBF?

When BYTE is low, D15–D8 output the MSB byte and D7–D0 output the LSB byte. When BYTE is high, D15–D8 output the LSB byte and D7–D0 output the MSB byte-enabling native alignment with 8-bit microcontrollers that read high-byte first. This behavior is defined in the "PIN FUNCTIONS" section on page 7.

Can the LTC1605AIG#PBF accept input voltages beyond ±10V?

Yes-the LTC1605AIG#PBF analog input (VIN) is overvoltage protected to ±25V per Absolute Maximum Ratings. However, valid conversion only occurs within the ±10V linear range; inputs beyond this saturate the output code and may increase transition noise unless clamped externally.

What is the significance of the "A" in LTC1605AIG#PBF?

The "A" denotes the improved grade of the LTC1605 family, specifying tighter integral nonlinearity (±2.0LSB max vs. ±3.0LSB for standard LTC1605) and lower full-scale error (±0.25% vs. ±0.50%)-verified in the "CONVERTER CHARACTERISTICS" table on page 3 of the datasheet.