Texas Instruments ADS8330IBPWR

Overview

ADS8330IBPWR from Texas Instruments is a 16-bit, 1-MSPS dual-channel unipolar SAR analog-to-digital converter with integrated 2:1 MUX, programmable TAG bit output, and SPI/DSP-compatible serial interface. It operates from 2.7 V to 5.5 V analog supply, delivers ±1.75 LSB max INL and 93 dB SNR at 10 kHz, and targets precision data acquisition in industrial sensor interfaces.

For engineers reviewing the ADS8330IBPWR datasheet, ADS8330IBPWR pinout, ADS8330IBPWR application, or ADS8330IBPWR equivalent, key selection criteria include dual-channel auto/manual channel select mode, 16-bit NMC over temperature, built-in conversion clock (22.3 MHz typical), deep power-down (2 nA), and TSSOP-16 package compatibility with daisy-chain operation.

Technical Context

The ADS8330IBPWR implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting both manual and auto-triggered conversions via CONVST or global timing control. Its dual-input MUX (+IN0/+IN1) enables time-multiplexed sampling of two independent unipolar signals (0 V to VREF), with COM as shared inverting input.

Conversion timing is governed by an internal 22.3 MHz CCLK (typical) or external SCLK up to 42 MHz; acquisition requires 3 CCLK cycles and conversion completes in 18 CCLK cycles (1 µs total at full rate). Output data is straight-binary, MSB-first, with optional TAG bit for channel identification in chain mode.

Key Specifications

Pinout & Package

TSSOP-16 package (PW designator), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed thermal pad internally connected to substrate (recommended to connect to AGND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel 16-bit SAR ADC applications.

Compared with ADS8329IPWR and AD7682BCPZ-RL7, the ADS8330IBPWR uniquely integrates dual-channel MUX, TAG bit, and internal CCLK - reducing BOM count and firmware complexity for time-synchronized multi-sensor systems without sacrificing 1-MSPS throughput or 16-bit linearity.

Availability

ADS8330IBPWR is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, magnetometer interfaces, and automated test equipment requiring stable component supply and long-term manufacturability.

Supply support for ADS8330IBPWR 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 connectivity technologies with over 90 years of innovation in precision signal chain solutions.

The ADS8330IBPWR belongs to TI's low-power, high-speed SAR ADC family designed for precision data acquisition in space- and power-constrained industrial and medical systems where 16-bit resolution, dual-channel flexibility, and robust serial interfacing are critical.

FAQ

What is the maximum sampling rate of the ADS8330IBPWR and under what supply conditions?

The ADS8330IBPWR achieves a maximum sampling rate of 1 MSPS when the analog supply (+VA) is between 3 V and 5.5 V. At 2.7 V ≤ +VA ≤ 3 V, the maximum rate is 900 kSPS. These rates assume use of the internal conversion clock (CCLK) and are fully specified over the –40°C to +85°C industrial temperature range. The ADS8330IBPWR maintains 16-bit no-missing-codes performance across both operating ranges.

Does the ADS8330IBPWR require an external reference voltage, and what are the valid input ranges?

Yes, the ADS8330IBPWR requires an external unipolar reference applied between REF+ and REF– pins. Valid reference voltage range is 0.3 V to +VA, with typical values of 2.5 V (at +VA = 3 V) or 5 V (at +VA = 5 V). REF– must be connected to AGND via a dedicated via to minimize noise; the reference input resistance is 40 kΩ, and the device supports ratiometric operation when sensor excitation matches VREF.

How does the TAG bit function in the ADS8330IBPWR, and when is it active?

The TAG bit is a programmable 1-bit identifier appended to the 16-bit conversion result on the SDO line, indicating which channel (+IN0 or +IN1) was sampled. It is active only when the device is configured for auto channel select mode and daisy-chain operation. In single-device configurations, the TAG bit still appears in the 17th bit position of the serial stream, allowing firmware to unambiguously associate each result with its source without external tracking logic. The ADS8330IBPWR outputs TAG=0 for +IN0 and TAG=1 for +IN1.

What power-down modes does the ADS8330IBPWR support, and what are their current draw specifications?

The ADS8330IBPWR supports three power-down modes: Deep Power-Down (2 nA typical), Nap Power-Down (0.25–0.4 mA), and Auto Nap Power-Down (automatically entered between conversions). Deep Power-Down disables all internal circuitry except wake-up logic; recovery time is ~1 µs. Nap mode retains reference and bias settings for faster wake-up (~200 ns). All modes are controlled via SPI command or hardware pin assertion, and the ADS8330IBPWR maintains full 16-bit specification compliance upon exit from any mode.

Can the ADS8330IBPWR be operated in daisy-chain configuration, and what pins are involved?

Yes, the ADS8330IBPWR supports multi-chip daisy chaining using the EOC/INT/CDI pin as chain data input and SDO as chain data output. In this mode, the CDI signal from one device feeds the EOC/INT/CDI pin of the next, enabling serial propagation of conversion status and data. The FS/CS signal remains individual per device, while SCLK and SDI are shared across the chain. Up to eight ADS8330IBPWR devices can be chained, with the TAG bit preserving channel identity through the entire cascade - a capability confirmed in the ADS8330IBPWR datasheet timing diagrams and register map.