Texas Instruments ADC1175-50CIJM

Overview

ADC1175-50CIJM from Texas Instruments is an 8-bit, 50 MSPS analog-to-digital converter with internal track-and-hold, single +5V operation, 125 mW typical power consumption, and 6.8 effective bits at 25 MHz input frequency. It delivers straight binary output formatting and supports video digitization in portable imaging systems.

For engineers reviewing the ADC1175-50CIJM datasheet, ADC1175-50CIJM pinout, ADC1175-50CIJM application, or ADC1175-50CIJM equivalent, key selection considerations include its 7 pF input capacitance, −54 dB THD (typ), 50 MSPS minimum sampling rate, power-down mode (<5 mW), and dual 24-pin TSSOP/WQFN package options.

Technical Context

The ADC1175-50CIJM employs a flash-based architecture with internal track-and-hold, enabling 50 MSPS sampling while maintaining 6.8 ENOB at 25 MHz input. Its reference ladder accepts externally set VRT (1.0–5.0 V) and VRB (0–4.0 V) to define the 0.6–2.6 V nominal conversion range.

Digital outputs D0–D7 are CMOS/TTL-compatible, latched on the rising edge of CLK, with 2.5-clock-cycle pipeline latency and 14 ns typical output delay. The PD pin enables <5 mW power-down mode, placing outputs in high-impedance TRI-STATE.

Key Specifications

Pinout & Package

ADC1175-50CIJM is available in a 24-pin WQFN package (NHW0024B), with exposed thermal pad, 4 mm × 4 mm body, and 0.5 mm pitch. Pin 1 marked via top-side dot; pins numbered counterclockwise from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, 50 MSPS analog-to-digital converter applications.

Compared with ADC1175-50CIJM, the TSSOP variant offers footprint compatibility but inferior thermal performance, while the ADS820U trades integrated reference convenience for greater design flexibility and higher power-making ADC1175-50CIJM optimal for compact, low-power video digitization where reference simplicity matters.

Availability

ADC1175-50CIJM is available at Aetrix Electronics and suitable for digital still cameras, CCD imaging systems, and electro-optic sensors requiring stable component supply across extended commercial temperature range (−20°C to +75°C).

Supply support for ADC1175-50CIJM 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 over 50 years of innovation in precision data converters and signal chain solutions.

The ADC1175-50CIJM belongs to TI's high-speed, low-power ADC family designed specifically for portable video, imaging, and real-time digitization applications demanding minimal power, small footprint, and robust DC/AC performance.

FAQ

What is the maximum input frequency supported by the ADC1175-50CIJM while maintaining specified ENOB?

The ADC1175-50CIJM achieves 6.8 effective bits at 25 MHz input frequency with 50 MHz clock. At 24.9 MHz input, ENOB drops to 6.1 bits (min), confirming usable full-scale bandwidth up to ~25 MHz. Performance degrades above this due to aperture jitter and internal comparator limitations-not rated for IF sampling beyond Nyquist zone 1.

Does the ADC1175-50CIJM require external reference components to operate?

No-ADC1175-50CIJM includes internal reference bias resistors. Connecting VRT to VRTS and VRB to VRBS establishes nominal 2.6 V and 0.6 V references. External references are optional for improved linearity or custom voltage ranges, but not required for basic operation of ADC1175-50CIJM.

How does the power-down mode affect the digital outputs of the ADC1175-50CIJM?

When PD is high, ADC1175-50CIJM enters <5 mW power-down mode and places D0–D7 outputs in high-impedance TRI-STATE. Outputs resume driving valid data 140 ns after PD returns low, with full functionality restored-including pipeline latency and timing alignment-within one clock cycle of wake-up.

Can the ADC1175-50CIJM be used with a 3.3 V digital interface?

No-ADC1175-50CIJM requires +4.75 V to +5.25 V on both AVDD and DVDD. Its digital I/O is CMOS/TTL-compatible but not 3.3 V tolerant; applying 3.3 V logic levels to CLK or PD violates VIH (2.0 V min) and may cause metastability or incomplete power-down activation. Level-shifting is mandatory for 3.3 V host systems interfacing with ADC1175-50CIJM.

What is the recommended bypassing strategy for ADC1175-50CIJM to ensure optimal AC performance?

Each AVDD and DVDD pin requires local decoupling: a 10 µF tantalum capacitor placed within 2.5 cm, plus a 0.1 µF ceramic chip capacitor mounted as close as possible to the pin. AVSS and DVSS must be joined near the package. A wideband choke (e.g., JW Miller FB20010-3B) between AVDD and DVDD lines further isolates analog noise-essential for achieving −54 dB THD and 6.8 ENOB in ADC1175-50CIJM.