Texas Instruments ADS831E/2K5G4

Overview

ADS831E/2K5G4 from Texas Instruments is an 8-bit, 80MHz pipelined analog-to-digital converter (ADC) with single-ended or differential input capability, internal/external reference selection, and SSOP-20 packaging. It delivers 49dB SNR at 1MHz, ±0.35LSB DNL, and operates from a single +5V supply - enabling high-fidelity digitization in medical imaging and video systems.

For engineers reviewing the ADS831E/2K5G4 datasheet, ADS831E/2K5G4 pinout, ADS831E/2K5G4 application, or ADS831E/2K5G4 equivalent, key selection considerations include its 4-clock-cycle latency, 2V_p-p/1V_p-p programmable input range, 300MHz track-mode bandwidth, CMOS/TTL-compatible digital outputs, and VDRV-supplied logic driver flexibility for 3V/5V interfacing.

Technical Context

The ADS831E/2K5G4 implements a 6-stage pipelined CMOS ADC architecture with integrated digital error correction to guarantee no missing codes and ±0.35LSB DNL at 10MHz. Its differential track-and-hold supports both single-ended and true differential analog inputs, with common-mode biasing via the CM pin or external resistor divider.

Reference operation is configurable via the INT/EXT pin: internal 3.0V/2.0V references (±100mV tolerance) or user-supplied external references within REFT ∈ [REFB+0.8V, V_S−1.25V] and REFB ∈ [1.25V, REFT−0.8V]. The RSEL pin selects full-scale ranges of 2V_p-p (HI) or 1V_p-p (LO), directly scaling quantization step size.

Key Specifications

Pinout & Package

ADS831E/2K5G4 is housed in a 20-pin SSOP (DBQ) package with 0.65mm pitch, 7.2mm × 5.3mm body, and exposed pad not electrically connected. Pin 1 is marked by a dot; pins 1 and 18 are ground; pin 19 is +VS; pin 20 is V_DRV.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS830E/2K5, ADS831E/2K5G4 delivers 20MSPS higher throughput and +1dB SNR for wider IF bandwidths; versus MAX1186EEE+, it offers simpler single-supply operation and integrated reference at the cost of CMOS-level noise sensitivity.

Availability

ADS831E/2K5G4 is available at Aetrix Electronics and suitable for medical imaging systems, video digitizing hardware, computer scanner designs, and communications infrastructure requiring stable component supply and long-term production continuity.

Supply support for ADS831E/2K5G4 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 with decades of ADC innovation.

The ADS831E/2K5G4 belongs to TI's high-speed pipeline ADC product line, designed specifically for demanding digitization tasks in medical, video, and communications equipment where speed, linearity, and SNR are critical.

FAQ

What is the maximum sampling rate supported by the ADS831E/2K5G4?

The ADS831E/2K5G4 supports a maximum sampling rate of 80 million samples per second (80MSPS), as specified in its electrical characteristics table under Conversion Characteristics. This rate is validated across the full –40°C to +85°C temperature range with external reference and 2V_p-p input range. Exceeding this rate may cause timing violations and degraded DNL performance.

Does the ADS831E/2K5G4 require an external reference to operate?

No, the ADS831E/2K5G4 does not require an external reference. It includes an internal reference generating 3.0V (REFT) and 2.0V (REFB) with ±100mV tolerance, enabling immediate operation with INT/EXT pin tied LOW. External references are optional and used when tighter accuracy, improved temperature drift, or multi-channel gain matching is needed.

How does the RSEL pin affect the input range of the ADS831E/2K5G4?

The RSEL pin on the ADS831E/2K5G4 selects the full-scale analog input range: when driven HIGH, it configures a 2V_p-p range (1.5V to 3.5V); when driven LOW, it selects a 1V_p-p range (2.0V to 3.0V). An internal 50kΩ pull-up resistor sets the default to HIGH, so leaving RSEL unconnected yields 2V_p-p operation - matching standard video and imaging signal levels.

What is the purpose of the VDRV pin on the ADS831E/2K5G4?

On the ADS831E/2K5G4, the VDRV pin supplies power exclusively to the digital output drivers, decoupling logic-level generation from the analog +VS supply. Setting VDRV to 3V reduces output swing and power dissipation (275mW vs 350mW at 5V), minimizing digital noise coupling into sensitive analog sections while maintaining CMOS/TTL compatibility.

Can the ADS831E/2K5G4 accept differential analog inputs?

Yes, the ADS831E/2K5G4 accepts true differential analog inputs on pins 16 (IN) and 17 (IN), supporting enhanced spurious-free dynamic range (SFDR) compared to single-ended mode. Differential operation requires matched external termination and common-mode biasing - either via the CM pin (for internal reference) or an external resistor divider between REFT and REFB.