Texas Instruments ADC08100CIMTC

Overview

ADC08100CIMTC from Texas Instruments is an 8-bit, single-ended analog-to-digital converter with on-chip track-and-hold, operating at 20–100 Msps sampling rates, consuming 1.3 mW/Msps (130 mW at 100 Msps), and featuring TTL/CMOS-compatible digital outputs powered by a separate DR VD supply. It delivers 7.4 ENOB at 41 MHz input frequency and supports industrial temperature range (−40°C to +85°C) in a 24-pin TSSOP package for imaging and portable communications systems.

For engineers reviewing the ADC08100CIMTC datasheet, ADC08100CIMTC pinout, ADC08100CIMTC application, or ADC08100CIMTC equivalent, this page provides verified technical context, real-world timing behavior (2.5-cycle pipeline latency, 5.9 ns output delay), DC accuracy (±0.5 LSB INL, ±0.4 LSB DNL), dynamic performance (−60 dB THD, 46 dB SINAD at 41 MHz), and reference ladder configuration (VRT/VRB/VRM pins).

Technical Context

The ADC08100CIMTC employs a unique switched-capacitor bandgap architecture optimized for proportional power scaling-consuming only 1.3 mW per MHz-and achieves 7.4 effective bits at 41 MHz input while maintaining 200 MHz full-power bandwidth. Its internal sample-and-hold acquires input on the falling edge of CLK, with straight-binary output valid after 2.5 clock cycles plus 5.9 ns propagation delay.

It features dual-supply operation: VA (+2.7V to +3.6V) powers analog circuitry and reference ladder (150–300 Ω), while DR VD (+2.4V to VA) independently supplies TTL/CMOS output drivers. The reference ladder's top (VRT), bottom (VRB), and mid-point (VRM) pins enable flexible input range definition (e.g., 0.3V to 1.9V), and the PD pin enables 1 mW power-down mode with output hold functionality.

Key Specifications

Pinout & Package

ADC08100CIMTC is housed in a 24-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, specified for −40°C to +85°C industrial operation. Pin 1 is marked with a dot; device orientation follows TI standard pin 1 indexing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC08060CIMTX and ADS830E, the ADC08100CIMTC uniquely combines 100 Msps capability, 1.3 mW/Msps efficiency, and fully accessible reference ladder-making it the only option among the three that satisfies both high-speed flat-panel display timing and low-power portable medical scanning requirements without trade-offs in interface flexibility or thermal management.

Availability

ADC08100CIMTC is available at Aetrix Electronics and suitable for flat panel displays, projection systems, and medical scan converters requiring stable component supply, long-lifecycle support, and guaranteed industrial-grade performance.

Supply support for ADC08100CIMTC 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 conversion technologies, with over 50 years of innovation in precision signal chain solutions.

The ADC08100CIMTC belongs to TI's high-speed, low-power ADC product line designed specifically for cost-sensitive, thermally constrained imaging and portable communications applications where 8-bit resolution, 100 Msps throughput, and flexible reference architecture are essential.

FAQ

What is the absolute maximum clock frequency supported by the ADC08100CIMTC?

The ADC08100CIMTC has a maximum conversion rate of 100 Msps minimum, with absolute maximum clock frequency rated at 125 MHz per its electrical characteristics table. However, guaranteed AC performance-including ENOB, SINAD, and THD-is specified only up to 100 Msps under recommended operating conditions (VA = DR VD = 3.0 V, fCLK = 100 MHz). Operating beyond 100 Msps may degrade dynamic performance and is not ensured across temperature or process variation. The ADC08100CIMTC must be used within its 100 Msps guaranteed specification for production designs.

Does the ADC08100CIMTC require external reference voltage sources?

No-the ADC08100CIMTC does not require external reference ICs, as it implements an internal reference ladder with user-accessible VRT (top), VRB (bottom), and VRM (midpoint) pins. These pins allow direct connection to externally generated reference voltages or simple resistor-divider networks. The datasheet confirms operation with VRT = 1.9 V and VRB = 0.3 V as typical, yielding a 1.6 V reference delta. While external low-impedance drivers improve performance, the ADC08100CIMTC functions correctly with passive biasing per Figure 30 in the SNAS060I datasheet.

How does the power-down mode affect output behavior in the ADC08100CIMTC?

When the PD pin is driven high, the ADC08100CIMTC enters power-down mode, reducing current consumption to 1 mW typical. Crucially, its D0–D7 output pins retain the last valid conversion result and remain in a high-impedance state only if explicitly disabled via external logic-the datasheet states outputs "hold the last conversion result." This behavior enables seamless wake-up without data loss in battery-powered instruments. The ADC08100CIMTC resumes full operation within one clock cycle after PD returns low, with no initialization sequence required.

Can the ADC08100CIMTC interface directly with 2.5 V FPGA I/O banks?

Yes-the ADC08100CIMTC supports direct interfacing with 2.5 V logic through its dedicated DR VD supply pin, which accepts voltages from +2.4 V to VA (max +3.6 V). When DR VD = 2.5 V, the D0–D7 outputs meet 2.5 V TTL/CMOS voltage thresholds (VOH ≥ 2.0 V, VOL ≤ 0.4 V at IOL = 1 mA), and input pins CLK and PD remain compatible with 2.5 V logic levels. This eliminates level-shifting components in FPGA-based set-top boxes and portable test equipment using the ADC08100CIMTC.

What is the significance of the VRM pin on the ADC08100CIMTC?

The VRM pin is the midpoint of the internal reference ladder and serves as a low-impedance tap for the reference voltage divider. It must be bypassed to a clean analog ground plane with a 0.1 µF capacitor to suppress noise coupling into the reference structure. Leaving VRM floating degrades INL and increases THD, as confirmed in the "Applications Information" section of the datasheet. Unlike VRT and VRB-which define the full-scale range-VRM enables stable mid-scale referencing critical for differential input configurations and noise-sensitive medical scan converter designs using the ADC08100CIMTC.