Texas Instruments ADS5237IPAGT

Overview

ADS5237IPAGT from Texas Instruments is a dual, 10-bit, 65MSPS pipelined analog-to-digital converter operating from a single +3.3V supply. It features internal reference, 3-state digital outputs, timing/duty-cycle-adjust PLL, and error correction logic - deployed in communications base stations, medical imaging, and CCD digitizing systems requiring high dynamic range and low DNL (±0.1LSB).

For engineers reviewing the ADS5237IPAGT datasheet, ADS5237IPAGT pinout, ADS5237IPAGT application, or ADS5237IPAGT equivalent, key selection considerations include its TQFP-64 package, dual-channel 65MSPS sampling with 61.7dBFS SNR at 5MHz, internal/external reference flexibility, and over-range flag support for front-end gain control.

Technical Context

The ADS5237IPAGT employs a fully differential sample-and-hold amplifier and pipelined ADC architecture with digital error correction to achieve ±0.1LSB DNL and no missing codes. Its dual-channel design supports independent analog inputs (INA+/INA−, INB+/INB−) and separate over-range flags (OVRA/OVRB), enabling simultaneous high-fidelity signal acquisition in multichannel IF processing.

It integrates a PLL for clock duty-cycle adjustment and supports both internal (2.0V REFT/1.0V REFB) and external reference modes. The serial interface (SEN/SCLK/SDATA) allows register configuration of output format (offset binary or two's complement), channel enable/disable, and power-down states - all accessible via SEL-controlled pin multiplexing.

Key Specifications

Pinout & Package

TQFP-64 package with exposed thermal pad (not electrically connected); 0.5mm pitch; 10mm × 10mm body; RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 10-bit, high-speed ADC applications.

Compared with ADS5237IPAGT, ADS5231IPAGT trades sampling speed and PLL integration for lower power and cost, while AD9222ASTZ delivers higher resolution at the expense of missing on-chip features like over-range indication and internal reference - making ADS5237IPAGT optimal for compact, self-contained IF receivers.

Availability

ADS5237IPAGT is available at Aetrix Electronics and suitable for communications base stations, medical ultrasound systems, and industrial CCD digitizers requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.

Supply support for ADS5237IPAGT 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 ADS5237IPAGT belongs to TI's high-speed ADC product line, designed specifically for multichannel IF digitization in wireless infrastructure and medical imaging - emphasizing low power, integrated references, and deterministic timing.

FAQ

What is the maximum sampling rate supported by the ADS5237IPAGT?

The ADS5237IPAGT supports a maximum sampling rate of 65MSPS when the internal PLL is enabled. At this rate, it achieves 61.7dBFS SNR at 5MHz input frequency with internal reference. With PLL disabled, the maximum usable rate drops to 30MSPS, requiring tight clock duty-cycle control (48–52%) to maintain performance. The ADS5237IPAGT datasheet specifies these limits under recommended operating conditions with AVDD = VDRV = 3.3V.

Does the ADS5237IPAGT support external reference operation?

Yes, the ADS5237IPAGT supports both internal and external reference modes. When INT/EXT pin (56) is pulled high, the internal 2.0V/1.0V reference pair is enabled. When pulled low, external reference voltages must be applied to REFT (53) and REFB (54) pins within 1.875–2.05V and 0.95–1.125V ranges respectively. External mode reduces total power dissipation to 330mW and improves tracking in multichannel systems. This capability is confirmed in the ADS5237IPAGT electrical characteristics table.

How does the over-range detection function work on the ADS5237IPAGT?

The ADS5237IPAGT provides dedicated OVRA (pin 39) and OVRB (pin 9) outputs that assert high when the respective channel's analog input exceeds the full-scale range. Detection occurs within 3 clock cycles of overload, and recovery is equally fast. These flags are used to drive front-end VGA or attenuator control loops - for example, reducing gain before saturation distorts subsequent samples. The ADS5237IPAGT functional description explicitly cites this use case for automatic gain control in receiver designs.

What package type and thermal characteristics does the ADS5237IPAGT have?

The ADS5237IPAGT is housed in a TQFP-64 package (10mm × 10mm, 0.5mm pitch) with exposed thermal pad. Its thermal resistance is θJA = 42.8°C/W and θJC = 18.7°C/W, measured under JEDEC JESD51-2 conditions. The device operates across –40°C to +85°C ambient temperature, with junction temperature limited to +105°C. These values are specified in the ADS5237IPAGT absolute maximum ratings and recommended operating conditions tables.

Can the ADS5237IPAGT output data in binary two's complement format?

Yes, the ADS5237IPAGT supports both straight offset binary and binary two's complement output formats. Format selection is controlled via the MSBI bit (bit D0) in the serial register map - set to 1 for two's complement, 0 for offset binary (default). This configuration is accessible only when SEL = 0 and the serial interface is disabled, or via the 3-wire serial interface when SEL = 1. The ADS5237IPAGT datasheet confirms this in Table 1 and the terminal functions section.