Texas Instruments ADC1175CIJM

Overview

ADC1175CIJM from Texas Instruments is an 8-bit, 20 MSPS analog-to-digital converter with internal sample-and-hold, single +5 V operation, TRI-STATE digital outputs, and industry-standard TSSOP-24 pinout. It delivers 7.5 effective bits (ENOB), consumes 60 mW typical power, and supports video digitization in portable imaging systems.

For engineers reviewing the ADC1175CIJM datasheet, ADC1175CIJM pinout, ADC1175CIJM application, or ADC1175CIJM equivalent, key selection criteria include its 20 MSPS sampling rate, ±0.75 LSB DNL max, self-bias reference ladder (VRTS/VRBS), 120 MHz analog input bandwidth, and commercial temperature range (–20°C to +75°C).

Technical Context

The ADC1175CIJM uses a unique pipeline architecture achieving 7.5 ENOB at 20 MSPS with aperture jitter of 30 ps rms. It samples on the falling edge of CLK and outputs straight binary data after 2.5 clock cycles of pipeline latency plus output delay (tOD ≤19.5 ns).

Reference configuration is flexible: VRT and VRB define the VIN conversion range (VRB to VRT), with self-bias enabled by shorting VRT→VRTS and VRB→VRBS to yield nominal 2.6 V and 0.6 V references. Analog input bandwidth is 120 MHz, and input capacitance varies with clock state (4 pF low, 11 pF high).

Key Specifications

Pinout & Package

TSSOP-24 package (Package Number PW), 0.65 mm pitch, thermally enhanced for 92°C/W junction-to-ambient thermal resistance. Pin 1 is OE (Output Enable), pin 12 is CLK (clock input), pins 3–10 are D0–D7 (LSB to MSB), pin 19 is VIN (analog input), pins 17/23 are VRT/VRB (reference top/bottom), and pins 16/22 are VRTS/VRBS (reference bias terminals).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, 20+ MSPS ADC applications.

Compared with MAX1180BCJ+ and AD9203ARUZ, the ADC1175CIJM offers the lowest system integration effort for +5 V video digitization due to its self-bias reference, TRI-STATE outputs, and exact TSSOP-24 pinout-while trading off resolution and jitter for cost and simplicity in consumer-grade imaging.

Availability

ADC1175CIJM is available at Aetrix Electronics and suitable for video digitization, digital still cameras, and personal computer video cameras requiring stable component supply and long-term industrial availability.

Supply support for ADC1175CIJM 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 high-performance data converters for industrial, automotive, and communications markets.

The ADC1175CIJM belongs to TI's precision high-speed ADC product line, designed specifically for cost-sensitive, low-power video and imaging applications where 8-bit resolution and 20 MSPS sampling meet broadcast and consumer-grade fidelity targets.

FAQ

What is the maximum guaranteed sampling rate for ADC1175CIJM?

The ADC1175CIJM has a minimum guaranteed sampling rate of 20 MSPS across its commercial temperature range (–20°C to +75°C). While it typically operates up to 30 MSPS, only the 20 MSPS rating is ensured per datasheet specifications under all conditions. This makes ADC1175CIJM suitable for NTSC (14.3 MHz pixel clock) and PAL (17.7 MHz) video digitization with margin.

Does ADC1175CIJM require an external reference voltage source?

No, ADC1175CIJM does not require an external reference voltage source. Its internal reference ladder can be self-biased by connecting VRT to VRTS and VRB to VRBS, yielding nominal 2.6 V and 0.6 V references at +5 V supply. This eliminates external reference ICs or resistor dividers in basic implementations, though external driving is recommended for highest accuracy.

What is the purpose of the two DVDD pins (Pin 11 and Pin 13) on ADC1175CIJM?

Pin 13 (DVDD) powers the digital output drivers, while Pin 11 (DVDD) supplies the digital core. Pin 11 may be operated at a lower voltage (≥2.5 V) than Pin 13 to interface directly with 3.3 V or 2.5 V logic, reducing level-shifter requirements. However, Pin 11 must never exceed Pin 13 by more than 0.5 V to prevent damage-this dual-DVDD structure enables flexible voltage translation in ADC1175CIJM designs.

How does ADC1175CIJM handle input signals outside the VRT–VRB range?

ADC1175CIJM clamps out-of-range inputs: signals below VRB produce an all-zero output code (0x00), and signals above VRT produce an all-ones code (0xFF). This behavior is deterministic and rail-to-rail compliant within the specified operating ranges (VRT = 1.0 V to AVDD; VRB = 0 V to 4.0 V), ensuring predictable saturation without damage-provided input voltages stay within absolute maximum ratings (–0.3 V to 6.5 V).

Is ADC1175CIJM pin-compatible with other TSSOP-24 8-bit ADCs?

Yes, ADC1175CIJM uses an industry-standard TSSOP-24 pinout explicitly stated in its datasheet, including matching signal assignments for CLK, OE, D0–D7, VIN, VRT, VRB, and power/ground pins. This enables direct replacement in existing layouts designed for compatible 8-bit, 20+ MSPS ADCs-though reference configuration (VRTS/VRBS) and dual DVDD structure should be verified for functional equivalence in the target application.