Texas Instruments ADS7852YB/2K

Overview

ADS7852YB/2K from Texas Instruments is a 12-bit, 8-channel SAR analog-to-digital converter with integrated 2.5V reference, 500kHz throughput, ±1 LSB INL, TQFP-32 package, and dual power-saving modes (nap/sleep). It serves as a high-accuracy front-end digitizer in multi-channel data acquisition systems requiring low power and compact layout.

For engineers reviewing the ADS7852YB/2K datasheet, ADS7852YB/2K pinout, ADS7852YB/2K application, or ADS7852YB/2K equivalent, key selection criteria include guaranteed ±1 LSB integral linearity over –40°C to +85°C, 70 dB SINAD at 50 kHz, parallel 12-bit straight-binary output timing, and VREF overdrive capability for 4.0–5.1 V input range.

Technical Context

The ADS7852YB/2K implements a capacitive redistribution successive approximation register (SAR) architecture with on-chip sample-and-hold, eliminating external hold circuitry. Its internal 2.5V bandgap reference is buffered and accessible via VREF pin, supporting both internal use and external override within 2.0–2.55 V.

Channel selection is performed via three address pins (A0–A2), enabling single-ended analog inputs AIN0–AIN7. Conversion is clocked externally (f_CLK = 16 × f_SAMPLE), with BUSY signaling completion and parallel 12-bit data latched on its rising edge. Power management includes nap mode (600 µA) and sleep mode (10 µA), entered via RD/A0/A1 control sequences.

Key Specifications

Pinout & Package

TQFP-32 (PBS) package with 0.8 mm pitch, 7 mm × 7 mm body, and exposed pad for thermal dissipation. RoHS-compliant, MSL Level-3 (260°C peak reflow, 168 hr 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 ADS7851YB/2K and ADS8325IPW, the ADS7852YB/2K uniquely balances 8-channel parallel acquisition, 500 kHz throughput, ±1 LSB linearity, and integrated reference in a single TQFP-32 device-making it irreplaceable in compact, multi-sensor embedded DAQ designs requiring deterministic timing and minimal BOM count.

Availability

ADS7852YB/2K is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and test & measurement applications requiring stable component supply and long-term lifecycle continuity.

Supply support for ADS7852YB/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 IC design.

The ADS7852YB/2K belongs to TI's precision SAR ADC product line, engineered for high-channel-count, low-power, and temperature-stable digitization in portable and ruggedized instrumentation platforms.

FAQ

What is the guaranteed integral linearity error for ADS7852YB/2K across its operating temperature range?

The ADS7852YB/2K guarantees ±1 LSB integral linearity error over the full –40°C to +85°C industrial temperature range, as confirmed in the Electrical Characteristics table under "Integral Linearity Error" for the YB grade. This specification includes contributions from the internal reference and applies with internal or external VREF, ensuring consistent 12-bit accuracy without recalibration.

How does the nap mode of ADS7852YB/2K differ from sleep mode in terms of wake-up time and power consumption?

The ADS7852YB/2K nap mode draws 600 µA typical current and enables immediate valid conversions upon exit, as the internal 2.5 V reference remains powered. In contrast, sleep mode draws only 10 µA but requires hundreds of milliseconds for reference stabilization, risking invalid data for ≥10 conversions at 500 kHz. Nap mode is preferred for burst-sampling applications where latency matters.

Can ADS7852YB/2K accept an external reference voltage, and what is the allowable range?

Yes, the ADS7852YB/2K supports external reference voltages applied to the VREF pin within 2.0 V to 2.55 V. This overdrives the internal 2.5 V reference and scales the analog input range proportionally (e.g., 2.0 V ref → 0–4.0 V input; 2.55 V ref → 0–5.1 V input), enabling optimized dynamic range usage with precision external references.

What is the timing relationship between BUSY going HIGH and valid data on DB0–DB11 for ADS7852YB/2K?

For the ADS7852YB/2K, the BUSY pin rises approximately 10 ns after the final clock cycle of conversion (t₁₃), and data on DB0–DB11 becomes valid 30 ns after CS and RD are both asserted LOW (t₉). Thus, valid data appears shortly after BUSY HIGH-but reading must wait for CS/RD assertion, not just BUSY transition, to avoid bus contention.

Is ADS7852YB/2K pin-compatible with ADS7852Y/2K, and what is the key functional distinction?

Yes, ADS7852YB/2K is pin-compatible with ADS7852Y/2K and shares identical TQFP-32 pinout and electrical interface. The key distinction is tighter DC accuracy: ADS7852YB/2K guarantees ±1 LSB INL and ±0.5 LSB DNL, whereas ADS7852Y/2K specifies ±2 LSB INL and ±1 LSB DNL-making YB the preferred choice for higher-precision applications.