Texas Instruments ADC1173CIMTC/NOPB

Overview

ADC1173CIMTC/NOPB from Texas Instruments is an 8-bit, 15 MSPS analog-to-digital converter optimized for video digitization and imaging systems operating from a single +3V supply. It delivers 7.6 effective bits at 3.58 MHz input, −54 dB THD (typ), ±0.85 LSB DNL (max), and consumes 33 mW (typ) excluding reference current. Its internal sample-and-hold, straight binary output, and industry-standard 24-pin TSSOP package make it suitable for digital still cameras and set-top boxes.

For engineers reviewing the ADC1173CIMTC/NOPB datasheet, ADC1173CIMTC/NOPB pinout, ADC1173CIMTC/NOPB application, or ADC1173CIMTC/NOPB equivalent, key selection considerations include its 3.58 MHz video-optimized ENOB, self-biasable reference ladder with VRT/VRB pins, 2.5-clock-cycle pipeline latency, and differential gain/phase performance of 1.5% and 0.5° - all validated over −40°C to +75°C.

Technical Context

The ADC1173CIMTC/NOPB employs a unique pipeline architecture achieving 7.6 effective bits at 3.58 MHz while maintaining DC accuracy (±0.5 LSB INL typ, ±0.85 LSB DNL max) and low power consumption (33 mW typ). Its analog input bandwidth is 120 MHz, aperture jitter is 30 ps rms, and sampling occurs on the falling edge of CLK with 3 ns aperture delay.

Reference configuration supports flexible input ranges: VRT (1.0 V to AVDD) and VRB (0 V to 2.0 V) define VIN conversion range (VRB to VRT), with self-bias options via VRTS/VRBS pins yielding nominal 1.56 V and 0.36 V references. Output enable (OE) controls CMOS/TTL-compatible tri-state digital outputs (D0–D7, straight binary).

Key Specifications

Pinout & Package

ADC1173CIMTC/NOPB is housed in a 24-pin TSSOP (PW package), thermally enhanced for operation across −40°C to +75°C. Pin spacing is 0.65 mm; body dimensions are 7.8 mm × 4.4 mm × 1.2 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, 15 MSPS ADC applications.

Compared with AD9200ARSZ and MAX1186EEE+, the ADC1173CIMTC/NOPB uniquely combines single 3 V operation, integrated reference biasing, and broadcast-grade video specs (0.5°/1.5%) in a compact TSSOP-making it optimal for cost-sensitive, space-constrained, and battery-powered video digitization where reference simplicity and color fidelity are critical.

Availability

ADC1173CIMTC/NOPB is available at Aetrix Electronics and suitable for video digitization, digital still cameras, and camcorders requiring stable component supply and long-term industrial availability.

Supply support for ADC1173CIMTC/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 and embedded processing technologies, with decades of innovation in data converters and signal chain solutions.

The ADC1173CIMTC/NOPB belongs to TI's legacy high-speed video ADC product line, engineered specifically for broadcast-compliant digitization in consumer and professional imaging equipment operating from single 3 V supplies.

FAQ

What is the maximum input frequency supported by the ADC1173CIMTC/NOPB before aliasing degrades video fidelity?

The ADC1173CIMTC/NOPB has an analog input bandwidth of 120 MHz, but for video applications like NTSC/PAL, the practical maximum input frequency is constrained by the 15 MSPS sampling rate and Nyquist criterion. To preserve color subcarrier integrity, input signals above 7.5 MHz require anti-aliasing filtering; the device maintains 7.6 ENOB at 3.58 MHz and 7.4 ENOB at 7.5 MHz, confirming suitability for standard-definition video digitization without aliasing artifacts when properly filtered.

Does the ADC1173CIMTC/NOPB require an external reference voltage, or can it operate with internal biasing?

The ADC1173CIMTC/NOPB supports both modes: it can use externally applied VRT and VRB voltages (1.0 V to AVDD and 0 V to 2.0 V respectively), or enable internal self-biasing by shorting VRT to VRTS and VRB to VRBS - yielding nominal reference voltages of 1.56 V and 0.36 V at 3.0 V supply. This eliminates external reference ICs in cost-sensitive designs while maintaining 7.6 ENOB performance.

How does the pipeline latency of the ADC1173CIMTC/NOPB impact synchronization in real-time video capture systems?

The ADC1173CIMTC/NOPB exhibits a fixed 2.5 clock-cycle pipeline latency from CLK falling edge (sampling instant) to valid D0–D7 output. This deterministic delay enables precise timing alignment with horizontal sync (H-SYNC) and pixel clocks in FPGA- or ASIC-based video processors - for example, inserting a 2.5-cycle offset in capture logic ensures frame-accurate buffer writes without dynamic calibration or variable delay lines.

Can the ADC1173CIMTC/NOPB be powered down to reduce system power during idle periods?

Yes - stopping the CLK signal at logic low reduces digital supply current from 2.3 mA to ~100 µA, cutting total power to ~5.8 mA (excluding reference current). However, halting CLK in the high state is not recommended. For full power savings, halt CLK low after two or more active cycles; this avoids excess reference ladder current and maintains latch-up immunity per datasheet guidelines.

What are the absolute maximum ratings for analog input voltage on the ADC1173CIMTC/NOPB, and how do they relate to safe operation with video signals?

The ADC1173CIMTC/NOPB specifies absolute maximum analog input voltage as −0.3 V to 6.5 V, but for accurate conversion, VIN must remain within the defined range VRB to VRT (e.g., 0.36 V to 1.56 V in self-bias mode). Input signals exceeding VRT by >50 mV or falling below VRB by >50 mV cause conversion errors - thus, 2.8 V_P-P video signals must be attenuated or clamped to fit within the selected reference span to avoid clipping and code ambiguity.