Texas Instruments ADS7852Y/2K

Overview

ADS7852Y/2K from Texas Instruments is a 12-bit, 8-channel successive approximation register (SAR) analog-to-digital converter with integrated 2.5V reference, 500kHz throughput, ±1LSB DNL, and TQFP-32 package. It operates from a single 5V supply, delivers 70dB SINAD, and supports nap/sleep modes for low-power data acquisition in medical instrumentation and industrial test systems.

For engineers reviewing the ADS7852Y/2K datasheet, ADS7852Y/2K pinout, ADS7852Y/2K application, or ADS7852Y/2K equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for multi-channel 12-bit parallel-output ADC selection.

Technical Context

The ADS7852Y/2K implements a capacitive redistribution SAR architecture with an internal bandgap reference and on-chip sample-and-hold. Its 13.5-clock-cycle conversion time (at f_CLK = 16 × f_SAMPLE) enables deterministic timing control via external clock, WR, RD, and BUSY signals.

Channel selection uses three address pins (A0–A2) to route one of eight single-ended analog inputs (AIN0–AIN7) to the converter core. The VREF pin accepts either the internal 2.5V reference (0V–5V input range) or an overdriven external voltage (2.0V–2.55V, yielding 4.0V–5.1V full-scale).

Key Specifications

Pinout & Package

TQFP-32 (PBS) package with 0.8mm pitch, exposed pad optional, rated for –40°C to +85°C operation. Requires dual decoupling: 0.1µF ceramic + 2.2µF tantalum on VREF; 0.1µF ceramic + 10µF tantalum on VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit, multi-channel, parallel-output ADC applications.

Compared with ADS7851Y/2K and MAX1167BCAP+, the ADS7852Y/2K uniquely combines 500kHz parallel throughput, nap-mode power gating, and 70dB SINAD in a production-qualified TQFP-32 package - making it optimal for high-fidelity, multi-channel embedded acquisition where timing predictability and low standby power coexist.

Availability

ADS7852Y/2K is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for ADS7852Y/2K 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 precision data converters and industrial-grade ICs.

The ADS7852Y/2K belongs to TI's precision SAR ADC product line, designed specifically for high-speed, low-power, multi-channel data acquisition in medical, test, and industrial environments where parallel interface determinism and integrated reference stability are critical.

FAQ

What is the maximum sampling rate supported by the ADS7852Y/2K?

The ADS7852Y/2K supports a maximum sampling rate of 500kHz, achieved with an external clock frequency of 8MHz (f_CLK = 16 × f_SAMPLE). This rate is fully specified over the –40°C to +85°C temperature range and requires proper decoupling and layout per the datasheet. At lower rates (e.g., 100kHz), INL/DNL performance improves slightly, but the device remains fully functional across its entire 125ns–5000ns clock period range.

Does the ADS7852Y/2K require an external reference voltage?

No - the ADS7852Y/2K includes a factory-trimmed 2.5V internal reference that sets a 0V–5V analog input range. However, the VREF pin accepts an external reference (2.0V–2.55V) to override the internal source, enabling 4.0V–5.1V full-scale spans. When using the internal reference, bypassing with 0.1µF ceramic + 2.2µF tantalum capacitors is mandatory to maintain 70dB SINAD and ±2LSB INL.

How does the nap mode differ from sleep mode in the ADS7852Y/2K?

In nap mode, the ADS7852Y/2K powers down all circuitry except the internal reference, allowing immediate (<100ns) wake-up and valid conversions upon exit. Sleep mode disables the reference entirely, requiring up to several hundred milliseconds for VREF stabilization and causing invalid output for ≥10 conversions at 500kHz. Nap mode draws 600µA (typical); sleep mode draws just 10µA (typical). Use nap for frequent, low-latency wake-ups; sleep only for extended idle periods.

Can the ADS7852Y/2K interface directly with an FPGA or microcontroller without level-shifting?

Yes - the ADS7852Y/2K uses CMOS-compatible logic levels: VIH ≥3V and VIL ≤0.8V at 5V supply, matching standard 5V-tolerant FPGA I/O and most industrial microcontrollers. Its 12-bit parallel bus (DB0–DB11), WR, RD, BUSY, and address pins operate natively at VSS = 5V, eliminating level shifters. Ensure AGND and DGND are tied at a single point near the ADC to prevent ground bounce-induced errors.

What layout practices are critical for achieving 70dB SINAD with the ADS7852Y/2K?

To achieve the specified 70dB SINAD, separate AGND and DGND planes must connect at a single point near the ADS7852Y/2K; VREF and VSS require dedicated 0.1µF ceramic + bulk tantalum decoupling placed <2mm from pins; clock traces must be short and shielded from digital routing; and analog inputs should avoid proximity to noisy digital lines or switching regulators. TI's SBAS111C layout guidelines specify minimum 10-mil trace widths and guard rings around AINx nets to suppress crosstalk.