Texas Instruments ADCS7477AIMFE/NOPB

Overview

ADCS7477AIMFE/NOPB from Texas Instruments is a 10-bit, 1-MSPS successive-approximation analog-to-digital converter (SAR ADC) with internal track-and-hold, single-supply operation (2.7 V to 5.25 V), SPI/QSPI/MICROWIRE-compatible serial interface, and ±0.2 LSB typical INL. It delivers 61.7 dBFS SINAD at 100 kHz input and consumes 2 mW at 3 V during continuous conversion - ideal for space-constrained automotive navigation and portable medical instrumentation.

For engineers reviewing the ADCS7477AIMFE/NOPB datasheet, ADCS7477AIMFE/NOPB pinout, ADCS7477AIMFE/NOPB application, or ADCS7477AIMFE/NOPB equivalent, key selection considerations include its 10-bit no-missing-codes resolution, 400 ns track/hold acquisition time, shutdown mode reducing power to <5 µA, and guaranteed operation from −40°C to 125°C in the 6-pin SOT-23 package.

Technical Context

The ADCS7477AIMFE/NOPB implements a charge-redistribution SAR architecture with integrated track-and-hold, using VDD as the reference to enable a full-scale input range of 0 V to VDD. Conversion is initiated by the falling edge of CS, and 16 SCLK cycles are required to output the 10-bit result preceded by four leading zeros and followed by two trailing zeros.

Its serial interface supports standard protocols including SPI, QSPI, and MICROWIRE, with timing validated up to 20 MHz SCLK and 1 MSPS throughput. The device transitions from track to hold on CS fall, completes conversion within 16 clock cycles, and returns to track mode on the 13th rising SCLK edge - enabling deterministic, low-latency sampling in real-time control loops.

Key Specifications

Pinout & Package

ADCS7477AIMFE/NOPB is housed in a 6-pin SOT-23 package (1.60 mm × 2.90 mm body size), optimized for ultra-compact PCB layouts in portable and automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SAR ADC applications.

Compared with AD7477ARTZ-REEL7 and MCP3201-I/P, ADCS7477AIMFE/NOPB uniquely combines 10-bit accuracy, 1-MSPS speed, supply-as-reference simplicity, and ultra-small SOT-23 packaging - making it optimal for next-generation space- and power-constrained embedded systems requiring automotive-grade reliability.

Availability

ADCS7477AIMFE/NOPB is available at Aetrix Electronics and suitable for automotive navigation, portable medical instrumentation, and industrial motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADCS7477AIMFE/NOPB 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 decades of expertise in high-reliability data converters and automotive-grade ICs.

The ADCS747x family was designed specifically for cost-sensitive, space-constrained applications demanding high-speed, low-power SAR conversion with simplified system integration - targeting automotive, industrial, and portable instrumentation markets.

FAQ

What is the resolution and missing-codes guarantee of ADCS7477AIMFE/NOPB?

ADCS7477AIMFE/NOPB provides guaranteed 10-bit resolution with no missing codes across −40°C to +85°C operating temperature. This is confirmed in Section 6.6 of the SNAS192G datasheet, where "Resolution with no missing codes" is specified as 10 bits under those conditions - ensuring monotonic transfer function and eliminating code-skipping errors in critical control applications.

Does ADCS7477AIMFE/NOPB require an external voltage reference?

No, ADCS7477AIMFE/NOPB uses its VDD supply as the reference, supporting a full-scale input range of 0 V to VDD. This eliminates the need for an external reference IC, reducing BOM cost and PCB area. The datasheet explicitly states this architecture in the Description section and specifies VDD-dependent LSB size (VDD/1024) in Section 7.4.1.

What is the maximum SCLK frequency supported by ADCS7477AIMFE/NOPB?

ADCS7477AIMFE/NOPB supports SCLK frequencies up to 20 MHz across −40°C to +85°C, as verified in Section 6.8 (Timing Requirements) of the datasheet. At 20 MHz, the device achieves its rated 1-MSPS throughput, with timing parameters such as t4 (data access time) and t7 (data hold time) fully characterized for reliable operation.

How does the shutdown mode reduce power consumption in ADCS7477AIMFE/NOPB?

In shutdown mode (enabled by holding CS high and disabling SCLK), ADCS7477AIMFE/NOPB draws less than 0.5 µA at 5 V, reducing power to under 2.5 µW. This is documented in Section 6.6 under "Shutdown mode" IDD and PD specifications - enabling ultra-low-power sleep states in battery-operated systems without losing configuration or requiring re-initialization.

What package type and dimensions does ADCS7477AIMFE/NOPB use?

ADCS7477AIMFE/NOPB uses the DBV (SOT-23-6) package with nominal body dimensions of 1.60 mm × 2.90 mm, as stated in the Device Information table on page 2 of SNAS192G. This surface-mount package supports automated assembly and minimizes footprint in dense PCB layouts typical of automotive and portable electronics.