Texas Instruments ADS5231IPAG

Overview

ADS5231IPAG from Texas Instruments is a dual-channel, 12-bit, 40MSPS pipelined analog-to-digital converter operating from a single +3.3V supply. It features internal reference (2.0V REF), 70.7dBFS SNR at 5MHz input, ±0.3LSB DNL, and TQFP-64 package. It serves in high-fidelity IF sampling for communications base stations and medical imaging systems requiring simultaneous dual-channel acquisition with low power and high dynamic range.

For engineers reviewing the ADS5231IPAG datasheet, ADS5231IPAG pinout, ADS5231IPAG application, or ADS5231IPAG equivalent, this page delivers verified technical context, real-world timing behavior, confirmed dual-channel spectral performance, and validated alternative options for multichannel data acquisition designs.

Technical Context

The ADS5231IPAG employs a switched-capacitor pipelined architecture with digital error correction logic to guarantee no missing codes and ±0.3LSB DNL across its full 12-bit range. Its differential sample-and-hold amplifier supports up to 300MHz analog input bandwidth and provides inherent common-mode noise rejection.

It integrates a PLL-based timing/duty-cycle adjust circuit enabling stable 40MSPS operation with 45–55% clock duty cycle tolerance; when disabled, it accepts external clocks up to 30MSPS with tighter 48–52% duty cycle control. The device supports both internal (2.0V) and external reference modes, with flexible 1.5–2.0V_PP input range and over-range flags per channel.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5231IPAG, ADS5270IPAP trades lower DNL for higher resolution and increased power, while AD9233BCPZ-40 reduces footprint but removes integrated reference and diagnostics-making ADS5231IPAG optimal for balanced performance, configurability, and ease of integration in multichannel systems.

Availability

ADS5231IPAG is available at Aetrix Electronics and suitable for communications base stations, medical imaging systems, and test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for ADS5231IPAG 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 ADS5231IPAG belongs to TI's high-speed pipeline ADC product line, designed specifically for multichannel, simultaneous-sampling applications in communications infrastructure, medical diagnostics, and instrumentation where accuracy, low latency, and power efficiency are co-optimized.

FAQ

What is the maximum supported sample rate for ADS5231IPAG with the internal PLL enabled?

The ADS5231IPAG supports up to 40MSPS when the internal PLL is enabled, as specified in the recommended operating conditions and confirmed by timing diagrams in the SBAS295A datasheet. At this rate, the device maintains 70.7dBFS SNR and ±0.3LSB DNL with a 45–55% input clock duty cycle. Operation beyond 40MSPS is not characterized or guaranteed for ADS5231IPAG.

Does ADS5231IPAG require external reference components when using the internal reference mode?

No-ADS5231IPAG does not require external reference components in internal reference mode. The device integrates trimmed 2.0V (REFT) and 1.0V (REFB) references with on-chip buffers. External 0.1µF bypass capacitors are required on REFT and REFB pins per the recommended power-up sequencing diagram, but no resistors or additional ICs are needed for basic operation.

How many clock cycles of latency does ADS5231IPAG exhibit between sampling and data output?

The ADS5231IPAG exhibits a fixed data latency of six clock cycles, as explicitly stated in the conversion characteristics table and verified in timing diagrams. This applies to both channels under all operating conditions (PLL on/off, internal/external reference). The latency is deterministic and independent of input signal frequency or amplitude.

Can ADS5231IPAG operate with a single-ended analog input?

ADS5231IPAG is designed for differential analog inputs only. Its sample-and-hold architecture and input structure (INA+/INA−, INB+/INB−) require complementary signals. Single-ended sources must be converted using an RF transformer or fully differential amplifier-TI's THS4521 or LMH6552 are validated driver options referenced in application notes for ADS5231IPAG.

What is the function of the SEL pin on ADS5231IPAG, and how should it be configured?

The SEL pin on ADS5231IPAG selects between parallel output mode (SEL = 0) and serial interface mode (SEL = 1). In parallel mode, pins 41–45 serve as MSBI, OEA, OVRA, STPD, and OEB. In serial mode, they become SEN, SCLK, SDATA, and control registers. TI specifies that a low-going pulse on SEL at power-up is mandatory to reset serial registers-leaving SEL floating or unconnected risks undefined behavior.