Renesas IDTADC0801S040-DB

Overview

IDTADC0801S040 from Integrated Device Technology is an 8-bit parallel-output analog-to-digital converter optimized for video digitization and general-purpose high-speed sampling. It operates from 2.7 V to 5.5 V analog/digital supplies, achieves up to 40 MHz sampling rate, delivers 7.3 effective bits at 4.43 MHz full-scale input, and supports CMOS/TTL-compatible digital I/O with sleep mode reducing power to 4 mW. It is used in real-time video capture systems where low-latency, bufferless analog input and deterministic timing are critical.

For engineers reviewing the IDTADC0801S040 datasheet, IDTADC0801S040 pinout, IDTADC0801S040 application, or IDTADC0801S040 equivalent, key selection considerations include its 20-pin SSOP package, external resistor-ladder reference architecture (RB/RM/RT pins), absence of internal sample-and-hold, and strict supply voltage differential limits (±0.2 V between VDDA and VDDD).

Technical Context

The IDTADC0801S040 employs a flash-based conversion architecture with an integrated resistor ladder referenced via three external pins (RB, RM, RT) to set full-scale range and offset. Its analog input accepts up to 1.84 V_p-p without requiring an external buffer due to low 2 pF input capacitance and 20 kΩ input impedance at 1 MHz.

Digital operation uses separate analog (VDDA/VSSA), digital (VDDD/VSSD), and output-stage (VDDO/VSSO) supply domains, enabling mixed-voltage system interfacing. Timing is synchronous to a single-ended CMOS/TTL clock (CLK), with output data valid within 12 ns (typ.) after clock edge and hold time ≥5 ns - supporting reliable latch capture in FPGA or ASIC interfaces.

Key Specifications

Pinout & Package

Package: SSOP20 (SOT266-1), plastic shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, 40 MHz ADC applications.

Compared with MAX1180BCUI+ and AD9280ARSZ, the IDTADC0801S040 uniquely provides parallel CMOS/TTL outputs with independent VDDO, external reference flexibility, and superior video-grade linearity (±0.5 LSB INL) - making it optimal for legacy or cost-sensitive video digitization where FPGA/ASIC parallel interfaces exist.

Availability

IDTADC0801S040 is available at Aetrix Electronics and suitable for video digitization, camera interface, camcorder signal chain, and radio communication IF sampling requiring stable component supply and long-term industrial availability.

Supply support for IDTADC0801S040 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

Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory interface, and data conversion ICs for communications, computing, and industrial markets.

IDTADC0801S040 belongs to IDT's legacy high-speed ADC family targeting broadcast-quality video digitization and real-time signal acquisition - emphasizing low latency, flexible referencing, and robust mixed-signal partitioning.

FAQ

What is the maximum analog input frequency supported by the IDTADC0801S040?

The IDTADC0801S040 supports analog input frequencies up to 10 MHz at full-scale sine wave (−2 LSB glitch limit), 13 MHz at 75% full-scale, and 20 MHz at 50% full-scale. Its small-signal bandwidth reaches 350 MHz, but usable Nyquist-limited digitization is constrained by the 40 MHz sampling rate and effective resolution degradation above ~10 MHz.

Does the IDTADC0801S040 require an external sample-and-hold circuit?

No, the IDTADC0801S040 does not require an external sample-and-hold circuit. Its flash architecture and low 2 pF analog input capacitance enable direct connection to signal sources, and the datasheet explicitly states "No sample-and-hold circuit required" as a key feature. This simplifies design and eliminates associated aperture jitter and hold-step errors.

How is the reference voltage configured on the IDTADC0801S040?

The IDTADC0801S040 uses an external resistor ladder referenced via three dedicated pins: RB (bottom), RM (middle), and RT (top). VRB is typically 1.2 V, VRT is ≤VDDA (e.g., 3.3 V), and their difference (1.5–2.7 V) sets the full-scale range. The ladder current is ~0.95 mA, and matching across multiple IDTADC0801S040 devices is optimized when sharing the same reference source.

What are the supply voltage requirements and constraints for the IDTADC0801S040?

The IDTADC0801S040 requires three isolated supplies: VDDA/VSSA (2.7–5.5 V analog), VDDD/VSSD (2.7–5.5 V digital), and VDDO/VSSO (2.5–5.5 V output). Critical constraint: |VDDA − VDDD| ≤ ±0.2 V and |VDDD − VDDO| ≤ +2.25 V (but ≥ −0.2 V) to prevent functional failure or latch-up per datasheet Table 1 and Table 4.

Can the IDTADC0801S040 operate with DC or very low-frequency analog inputs?

Yes, the IDTADC0801S040 supports DC sampling - confirmed in Section 2 ("Features") and validated by its ramp-input linearity test conditions. Its flash architecture has no inherent minimum input frequency limitation, enabling use in precision DC measurement, sensor digitization, and calibration applications alongside its primary video role.