Texas Instruments ADS807E

Overview

ADS807E from Texas Instruments is a 12-bit, 53 MHz pipelined analog-to-digital converter with differential track-and-hold, internal/external reference selection, and 3-state digital outputs in SSOP-28 package. It delivers 82 dB SFDR at 10 MHz f_IN, 69 dB SNR at 3 V_p-p input, and ±0.5 LSB DNL for high-fidelity signal acquisition in IF sampling and imaging systems.

For engineers reviewing the ADS807E datasheet, ADS807E pinout, ADS807E application, or ADS807E equivalent, this page provides verified technical context, real-world interface constraints, confirmed dynamic performance across input ranges (2 V_p-p/3 V_p-p), validated timing latency (6 clock cycles), and precise package-level thermal and drive requirements for production-grade layout and system integration.

Technical Context

The ADS807E implements a 12-stage pipelined architecture with on-chip digital error correction logic to guarantee no missing codes and ±0.5 LSB DNL at 40 MHz sampling. Its differential track-and-hold accepts either fully differential or single-ended inputs, with common-mode voltage output (CM) enabling self-biased driver configurations.

Reference selection is controlled via INT/EXT pin (LOW = internal 50 kΩ pull-up enabled; HIGH/FLOATING = external reference), while FSSEL sets full-scale range: LOW = 2 V_p-p (REFT = +3.0 V, REFB = +2.0 V), HIGH = 3 V_p-p (REFT = +3.25 V, REFB = +1.75 V). Output enable (OE) supports multiplexed bus sharing with 20–40 ns 3-state enable time.

Key Specifications

Pinout & Package

ADS807E is housed in a 28-pin SSOP (DB) package with exposed pad thermal enhancement, rated for –40°C to +85°C ambient operation. Pin pitch is 0.65 mm; body dimensions are 10.2 mm × 5.3 mm × 1.95 mm (max height).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, 12-bit ADC applications.

Compared with ADS807E, ADS802E trades speed and diagnostic features (OTR, CM) for lower power and cost, while AD9220AR sacrifices integration and flexibility for broader vendor support and mature qualification-making ADS807E optimal for new high-dynamic-range IF and imaging designs demanding integrated reference and real-time saturation detection.

Availability

ADS807E is available at Aetrix Electronics and suitable for communications base stations, medical imaging subsystems, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS807E 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 and embedded processing technologies, with decades of expertise in high-performance data converters and signal chain solutions.

The ADS807E belongs to TI's high-speed pipeline ADC product line, designed specifically for demanding IF sampling, medical imaging, and test instrumentation applications where dynamic range, low latency, and flexible interface options are critical.

FAQ

What is the maximum sampling rate supported by the ADS807E?

The ADS807E supports a maximum sampling rate of 53 MSPS, as specified in its electrical characteristics table under "Conversion Characteristics." This rate is validated across the full operating temperature range (–40°C to +85°C) and enables undersampling applications up to 40 MHz input frequency while maintaining 76 dB SFDR. Operation beyond 53 MSPS is not characterized and may result in degraded linearity or missing codes.

Does the ADS807E require an external reference, or can it operate with its internal reference?

The ADS807E can operate with either its internal bandgap reference or an external reference, selected via the INT/EXT pin: LOW enables the internal reference (with 50 kΩ pull-up), while HIGH or floating disables it for external reference use. Internal reference supports both 2 V_p-p and 3 V_p-p full-scale ranges via FSSEL, and provides REFT/REFB outputs capable of sourcing/sinking up to 1 mA for external circuit biasing.

How does the OTR (over-range) flag function in the ADS807E?

The OTR pin on the ADS807E is an active-high indicator that asserts when the analog input exceeds the configured full-scale range (2 V_p-p or 3 V_p-p). It responds within 2 ns of overdrive and remains asserted until the input returns within range. This hardware-level flag enables real-time automatic gain control (AGC) in RF receivers or saturation detection in CCD readout without CPU intervention, preserving data integrity during transient overload events.

What is the purpose of the CM (common-mode) output pin on the ADS807E?

The CM pin on the ADS807E provides a buffered mid-supply voltage (typically +2.5 V) derived from the internal reference, used to bias the inputs of external driver amplifiers. This eliminates the need for external level-shifting circuitry in single-supply systems and ensures matched common-mode conditions between the ADC and driver-critical for maintaining differential balance, minimizing offset drift, and achieving optimal SFDR in high-frequency applications.

Can the ADS807E be used with single-ended analog inputs?

Yes, the ADS807E supports single-ended analog inputs: one input (IN or IN) receives the signal while the other is biased to the required common-mode voltage (typically +2.5 V), often sourced from the CM pin. However, single-ended operation reduces SFDR by ~20 dB compared to differential mode (e.g., 62 dBFS vs. 82 dBFS at 10 MHz) due to increased even-order harmonics and reduced noise immunity-making it suitable only for less demanding time-domain applications where interface simplicity outweighs dynamic performance loss.