Texas Instruments ADS7852Y/250

Overview

ADS7852Y/250 from Texas Instruments is a 12-bit, 8-channel 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 equipment.

For engineers reviewing the ADS7852Y/250 datasheet, ADS7852Y/250 pinout, ADS7852Y/250 application, or ADS7852Y/250 equivalent, key selection factors include its parallel 12-bit output interface, channel-select address logic (A0–A2), internal reference tolerance (±2 LSB gain error), and guaranteed operation across –40°C to +85°C.

Technical Context

The ADS7852Y/250 implements a capacitive redistribution SAR architecture with an on-chip 2.5V bandgap reference and integrated sample-and-hold. Conversion is clock-driven (f_CLK = 16 × f_SAMPLE), requiring 13.5 clock cycles per conversion and delivering 1.75µs typical conversion time.

It features an 8-channel single-ended analog multiplexer controlled by A0–A2 address pins, full 12-bit straight-binary parallel output (DB0–DB11), and dual power-down modes: Nap mode (600µA, reference active) and Sleep mode (10µA, full shutdown). Input range is 0V to 5V with internal reference or 4.0V to 5.1V with external 2.0–2.55V reference.

Key Specifications

Pinout & Package

TQFP-32 (PBS) package with exposed thermal pad; 0.5mm lead pitch; RoHS-compliant; MSL Level-3 (260°C peak reflow, 168-hour floor life).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7851Y/250 and ADS7853Y/250, the ADS7852Y/250 uniquely balances 8-channel parallel simplicity, deterministic timing, and ultra-low power nap mode-making it optimal for space-constrained, low-latency industrial and medical DAQ where bus width is available.

Availability

ADS7852Y/250 is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and test & measurement applications requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to +85°C performance.

Supply support for ADS7852Y/250 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/250 belongs to TI's precision SAR ADC product line, designed specifically for high-fidelity, multi-channel data acquisition in resource-constrained environments where low power, small size, and guaranteed specifications across temperature are essential.

FAQ

What is the maximum sampling rate supported by the ADS7852Y/250?

The ADS7852Y/250 supports a maximum sampling rate of 500 kHz, achieved with an external clock frequency of 8 MHz (f_CLK = 16 × f_SAMPLE). At this rate, conversion time is 1.75 µs and acquisition time is 0.25 µs. Lower rates down to 12.5 Hz are also supported using slower clocks, allowing flexible trade-offs between speed and power consumption in the ADS7852Y/250.

Does the ADS7852Y/250 require an external reference voltage?

No, the ADS7852Y/250 includes an internal 2.5V bandgap reference that sets a 0V to 5V input range. However, the VREF pin accepts external references from 2.0V to 2.55V-overriding the internal source-to support custom full-scale ranges (e.g., 4.0V to 5.1V). The ADS7852Y/250's internal reference is buffered and must be bypassed with 0.1µF ceramic + 2.2µF tantalum capacitors.

How does the ADS7852Y/250 enter Nap or Sleep mode?

The ADS7852Y/250 enters Nap or Sleep mode on the rising edge of RD after a conversion completes, depending on A0 and A1 states: A0 = 1 and A1 = 0 triggers Nap mode (600µA); A0 = 1 and A1 = 1 triggers Sleep mode (10µA). Both modes are exited immediately by asserting WR low while CS is low. This behavior is fully documented in the ADS7852Y/250 datasheet timing diagrams and power-down tables.

What is the meaning of "no missing codes" for the ADS7852Y/250?

"No missing codes" means the ADS7852Y/250 guarantees a strictly monotonic transfer function across its entire 12-bit range (0x000 to 0xFFF) under all operating conditions (–40°C to +85°C, 4.75–5.25V supply). This ensures every possible digital output code appears for some analog input voltage-critical for accurate threshold detection and avoiding ambiguous readings in safety-related ADS7852Y/250 applications.

Can the ADS7852Y/250 interface directly with a microcontroller's parallel data bus?

Yes, the ADS7852Y/250 provides a full 12-bit straight-binary parallel output (DB0–DB11) with CMOS-compatible logic levels (VIH ≥ 3V, VOL ≤ 0.4V at 250µA), enabling direct connection to 8051, ARM Cortex-M, or FPGA parallel interfaces. Tri-state drivers are controlled by CS and RD, allowing shared bus operation. No level shifters or serialization logic are required for proper ADS7852Y/250 integration.