Analog Devices Inc. 5962-8776202VX

Overview

AD7575 from Analog Devices is a high-speed 8-bit successive approximation ADC with integrated track-and-hold, single +5 V supply operation, 5 µs conversion time (with 4 MHz external clock), ±1 LSB total unadjusted error (K/B/S/T versions), and full-power analog input bandwidth of 50 kHz - used for digitizing audio and ultrasonic signals in embedded microprocessor systems.

For engineers reviewing the AD7575 datasheet, AD7575 pinout, AD7575 application, or AD7575 equivalent, this page delivers verified technical context, validated pin functions, real-world interface timing constraints, confirmed alternative options, and supply-chain support for industrial and aerospace-grade designs requiring MIL-STD-883B-compliant components.

Technical Context

The AD7575 employs a SAR architecture with on-chip track-and-hold that acquires the analog input on the third falling edge of CLK after CS and RD go low; conversion completes in exactly 20 CLK cycles (10 internal clock periods). Its LC2MOS process enables CMOS power efficiency (15 mW typ) while maintaining TTL/CMOS-compatible digital I/O levels.

It supports two microprocessor interface modes: Slow Memory (WAIT-state driven via BUSY signal) and ROM-style (non-blocking, dual-read protocol); TP must be hard-wired HIGH, and VREF requires a low-impedance source (6–18 kΩ code-dependent load) to maintain ±1 LSB accuracy.

Key Specifications

Pinout & Package

AD7575 is available in 18-lead DIP (N-18), 18-lead SOIC (R-18), 20-lead PLCC (P-20A), and 20-lead LCCC (E-20A) packages. The 5962-8776202VX variant corresponds to the military-grade Q-18 Cerdip package per DESC drawing #5962-87762, rated for –55°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit SAR ADC applications.

Compared with MAX160CJN+ and ADS7822U, the AD7575 uniquely combines single +5 V operation, on-chip track-and-hold, ±1 LSB error over military temperature range, and parallel 8-bit bus interface - making it irreplaceable in legacy avionics, space-qualified telemetry, and industrial control systems requiring drop-in compatibility with 8085/Z80 architectures.

Availability

AD7575 is available at Aetrix Electronics and suitable for industrial data acquisition, aerospace telemetry systems, medical ultrasound front-ends, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7575 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD7575 belongs to Analog Devices' legacy precision converter product line, designed specifically for embedded microprocessor systems requiring fast, low-power, single-supply 8-bit digitization with minimal external components.

FAQ

What is the guaranteed conversion time for AD7575 under military temperature conditions?

The AD7575 guarantees 5 µs conversion time with a 4 MHz external clock across its full military temperature range (–55°C to +125°C) for S/T/Q-variant parts like 5962-8776202VX. Internal clock operation yields 9–13 µs depending on temperature; external clock is required for deterministic 5 µs timing in mission-critical applications. This specification is explicitly confirmed in the AD7575 REV. B datasheet Table "CONVERSION TIME" for S and T versions.

Does AD7575 require external calibration to achieve ±1 LSB total unadjusted error?

No, the AD7575 achieves ±1 LSB total unadjusted error (for K/B/T/S versions) without any offset or gain calibration - as stated in the "FEATURES" section and verified in the "SPECIFICATIONS" table. The zero, full-scale, and linearity errors are inherently low enough that calibration is optional. However, if used in bipolar configuration (Figure 17), resistor tolerance (0.1%) and matching become critical to maintain this accuracy, and calibration may be needed.

Can AD7575 interface directly with a TMS32010 DSP without level-shifting?

Yes, the AD7575 interfaces directly with the TMS32010 DSP at up to 18 MHz clock rates, as confirmed in the "Fast Digital Interface" product highlight and Figure 8 of the datasheet. Its VOH (≥4.0 V) and VOL (≤0.4 V) meet TTL requirements, and the 100 ns data access time satisfies TMS32010 timing. No level-shifting is required - the AD7575 is mapped to a port address and controlled via IN A, PA instructions.

What is the function of the TP pin on AD7575, and how must it be connected?

TP (Test Pin) on the AD7575 is reserved for factory testing and must be hard-wired HIGH (to VDD) in all applications. The datasheet explicitly warns that leaving TP floating or pulling it LOW results in undefined operation. It is not a functional I/O pin and must never be used as a feedthrough on double-sided PCBs - doing so risks compromising conversion integrity and timing behavior of the AD7575.

How does the AD7575 handle analog input settling during conversion initiation?

The AD7575 samples the analog input on the third falling edge of CLK after CS and RD go LOW, and its internal sampled-data comparator settles within ~7 ns (based on 500 Ω switch resistance and 2 pF input capacitance). This ensures the input voltage is resolved to within ±1/4 LSB before the first SAR comparison cycle begins - provided source impedance stays ≤2 kΩ. Higher source impedances increase settling time and risk missing codes or increased INL.