Texas Instruments ADS804E

Overview

ADS804E from Texas Instruments is a 12-bit, 10-MSPS pipelined analog-to-digital converter with 69 dB SNR, 80 dB SFDR at Nyquist, ±0.3 LSB DLE, and flexible 0–5 V or 1.5–3.5 V input range. It integrates internal reference, over-range detection, and 3-state CMOS/TTL-compatible outputs - deployed in IF/baseband digitization, CCD imaging, and test instrumentation.

For engineers reviewing the ADS804E datasheet, ADS804E pinout, ADS804E application, or ADS804E equivalent, key selection considerations include pipeline latency (6 clock cycles), aperture jitter (4 ps rms), input-referred noise (0.09 LSBs rms at 5 V_p-p), and SSOP-28 package compatibility with ADS803/ADS805 for design reuse.

Technical Context

The ADS804E employs a high-bandwidth track-and-hold with 270 MHz –3 dB bandwidth to minimize harmonic distortion and jitter, enabling stable 69 dB SNR up to 4.8 MHz input frequency. Its digital error correction logic ensures ±0.3 LSB differential linearity across temperature (–40°C to +85°C).

It supports dual reference modes: internally generated +1 V or +2.5 V (selected via SEL/VREF strap), yielding programmable full-scale spans from 2 V_p-p to 5 V_p-p; the OVR flag provides real-time over-range indication synchronized to the 6-cycle pipeline output latency.

Key Specifications

Pinout & Package

ADS804E is housed in a 28-pin SSOP (DB) package with exposed thermal pad, rated for –40°C to +85°C operation and MSL Level-2-260°C reflow profile.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with ADS804E, ADS803E trades speed and dynamic range for lower power and cost, while ADS805E extends bandwidth at the expense of increased jitter sensitivity and thermal load - ADS804E remains optimal for balanced 10 MSPS, low-noise, production-ready designs.

Availability

ADS804E is available at Aetrix Electronics and suitable for IF digitization, CCD imaging, and test instrumentation requiring stable component supply across extended product lifecycles.

Supply support for ADS804E 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data converters.

The ADS804E belongs to TI's high-speed precision ADC family, engineered for demanding communications, imaging, and instrumentation applications where SNR, SFDR, and pipeline determinism are critical.

FAQ

What is the maximum sampling rate supported by the ADS804E?

The ADS804E supports a maximum sampling rate of 10 million samples per second (10 MSPS), validated across its full specified temperature range (–40°C to +85°C) with 69 dB SNR and 80 dB SFDR performance maintained at 4.8 MHz input frequency. This rate is enforced by the minimum convert clock period of 100 ns per the datasheet timing specifications.

Does the ADS804E include an internal voltage reference?

Yes, the ADS804E integrates a bandgap-based internal voltage reference that can be configured to output either +1 V or +2.5 V depending on the strap configuration of the SEL and VREF pins. When SEL is tied to VREF, it produces a 2 V_p-p input range; when SEL is grounded, it yields a 5 V_p-p range. The reference tolerance is ±35 mV at 25°C for the 2.5 V option.

How does the over-range (OVR) flag function on the ADS804E?

The OVR pin on the ADS804E is a digital output that goes high whenever the analog input voltage exceeds the selected full-scale range defined by REFT and REFB. It updates synchronously with the 6-clock-cycle pipeline latency and remains asserted until the next valid conversion completes. This allows real-time monitoring and closed-loop gain adjustment in front-end amplifier stages.

What package type is used for the ADS804E?

The ADS804E is packaged in a 28-pin SSOP (Shrink Small Outline Package), designated DB by Texas Instruments. It features a 0.65 mm pin pitch, operates from –40°C to +85°C, and carries an MSL Level-2 rating (260°C peak reflow, 1-year floor life). The ordering variant ADS804E/1K.B ships in tape-and-reel format with 1000 units per reel.

Can the ADS804E interface directly with 3V logic systems?

Yes, the ADS804E supports direct interfacing with 3V logic through its dedicated VDRV pin (Pin 28), which supplies the digital output drivers independently from the +5V analog supply. When VDRV is set to +3V, the ADS804E outputs logic-high levels near +2.5V and logic-low levels below +0.4V - meeting standard 3V CMOS input thresholds without external level shifters.