Texas Instruments ADS5231IPAGG4

Overview

ADS5231IPAGG4 from Texas Instruments is a dual-channel, 12-bit, 40MSPS pipelined analog-to-digital converter (ADC) with integrated sample-and-hold, internal reference, PLL-based timing/duty-cycle adjustment, and 3-state parallel outputs. It operates from a single +3.3V supply, delivers 70.7dBFS SNR at 5MHz input, and supports flexible 1.5–2V_PP differential input range for high-fidelity signal digitization in communications IF processing and medical imaging systems.

For engineers reviewing the ADS5231IPAGG4 datasheet, ADS5231IPAGG4 pinout, ADS5231IPAGG4 application, or ADS5231IPAGG4 equivalent, key selection considerations include simultaneous dual-channel sampling latency (6 clock cycles), over-range flag support per channel (OVRA/OVRB), serial register programmability (SEL/SEN/SCLK/SDATA), internal vs. external reference trade-offs (321mW vs. 285mW total power), and TQFP-64 package thermal performance (θ_JA = 42.8°C/W).

Technical Context

The ADS5231IPAGG4 employs a multi-stage pipelined architecture with digital error correction logic to guarantee no missing codes and ±0.3LSB DNL across its full operating range. Its differential sample-and-hold amplifier provides 300MHz analog input bandwidth and suppresses even-order harmonics via common-mode noise immunity.

Timing is managed either by an on-chip PLL (enabling 40MSPS operation with relaxed 45–55% clock duty cycle) or direct clocking (supporting 2–30MSPS with tighter 48–52% duty cycle requirement above 30MSPS). The device supports straight offset binary or binary two's complement output coding, configurable via serial interface or MSBI pin.

Key Specifications

Pinout & Package

TQFP-64 package with exposed thermal pad; 10mm × 10mm footprint, 0.5mm pitch, JEDEC MO-220 standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel 12-bit ADC applications.

Compared with ADS5231IPAGG4, ADS5232IPAG offers extended temperature operation and slightly higher speed headroom, while AD9236BCPZ-40 trades dual-channel capability for LVDS interface and lower power-making it suitable for space- and noise-sensitive single-channel applications where channel correlation is irrelevant.

Availability

ADS5231IPAGG4 is available at Aetrix Electronics and suitable for communications base stations, medical ultrasound systems, and high-speed test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADS5231IPAGG4 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 for industrial, automotive, and communications markets.

The ADS5231 belongs to TI's high-speed precision ADC product line, designed specifically for demanding dual-channel digitization in communications infrastructure, medical imaging, and instrumentation where simultaneous sampling, low distortion, and system-level integration are critical.

FAQ

What is the maximum supported sample rate for ADS5231IPAGG4 with the internal PLL enabled?

The ADS5231IPAGG4 supports a maximum sample rate of 40MSPS when the internal PLL is enabled. This configuration allows relaxed 45–55% input clock duty cycle requirements and is the default operational mode. At this rate, the device achieves 70.7dBFS SNR at 5MHz input frequency and maintains ±0.3LSB DNL performance across its full temperature range of –40°C to +85°C.

How does the ADS5231IPAGG4 handle over-range conditions, and what is the recovery time?

The ADS5231IPAGG4 provides dedicated over-range indicator pins OVRA and OVRB for each channel, which assert high when the differential input exceeds ±V_REF. Recovery from overload is guaranteed within 3 clock cycles, allowing rapid feedback to front-end AGC circuitry. This behavior is validated across all operating conditions including worst-case temperature and supply variations, and is independent of reference mode (internal or external).

Can ADS5231IPAGG4 operate with an external reference, and how does power consumption change?

Yes, ADS5231IPAGG4 supports external reference operation via the INT/EXT pin (pulled high) and REFT/REFB pins. In external reference mode, total power dissipation drops to 285mW (vs. 321mW with internal reference), with analog supply (AVDD) consuming 200mW and output driver (VDRV) consuming 85.5mW. External reference must be 1.875–2.05V (REFT) and 0.95–1.125V (REFB) with ≤1mA input current.

What is the function of the SEL pin on ADS5231IPAGG4, and how does it affect pin functionality?

The SEL pin (Pin 1) configures ADS5231IPAGG4 between parallel interface mode (SEL = 0) and serial interface mode (SEL = 1). When SEL = 0, pins 41, 42, and 45 become MSBI, OEA, and STPD respectively; serial interface is disabled. When SEL = 1, those same pins become SEN, SCLK, and SDATA for programming registers-including PLL enable/disable, output coding, and channel power-down-providing flexible configuration without external hardware changes.

Does ADS5231IPAGG4 support both straight offset binary and binary two's complement output formats?

Yes, ADS5231IPAGG4 supports both straight offset binary (SOB) and binary two's complement (BTC) output coding. Format selection is achieved either via the MSBI pin (when SEL = 0) or through bit D0 of the serial register (when SEL = 1). SOB is the default format. BTC mode enables direct connection to signed arithmetic units in FPGAs or DSPs without software sign extension, reducing post-processing latency in real-time systems.