ADC1175CIMTCX - 8-Bit 20MSPS ADC, 24-TSSOP | Texas Instruments
MPN: ADC1175CIMTCX ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.92 | $4.92 |
| 10 | $4.4 | $44.00 |
| 100 | $3.85 | $385.00 |
| 500 | $3.32 | $1,660.00 |
| 1,000 | $2.95 | $2,950.00 |
ADC1175CIMTCX Overview
An ADC (analog-to-digital converter) is a semiconductor device that converts continuous-time, continuous-amplitude analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the converter hierarchy, the ADC1175 belongs to the successive-approximation and flash hybrid (two-step) subfamily, positioned between low-speed SAR ADCs (kSPS range) and high-speed flash ADCs (hundreds of MSPS). It is part of TI's broader data-converter portfolio under the Linear / Mixed-Signal IC category, frequently co-designed with operational amplifiers, voltage references, and clock generators in mixed-signal systems.
Key features include a single +5V analog supply, CMOS-compatible digital outputs that can be placed into a high-impedance state via an OE pin, an internal reference ladder, and an integral Track-and-Hold (T/H) front end that eliminates the need for external sample-and-hold circuitry. The two-step architecture avoids the comparator-count explosion of pure flash converters while preserving throughput, enabling 20 MHz conversion at modest power and cost.
Typical applications include digital still cameras, CCD imaging front-ends, video digitizers, set-top box component inputs, portable instrumentation, and intermediate-frequency (IF) sampling in communication receivers. The 60 mW typical power dissipation also makes the device attractive for low-power imaging pipelines where battery life matters.
When designing with the ADC1175CIMTCX, ensure the analog input is AC- or DC-coupled through a low-impedance driver, and place a 0.1 uF decoupling capacitor close to each supply pin. The OE pin allows the digital bus to be shared with another ADC in multi-channel systems.
Drop-in alternatives for ADC1175CIMTCX — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADC1175CIMTCX (same form factor and footprint) — differing in Resolution, Architecture, Input Type, Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADC1175CIMTCX/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
ADC1175CIJM
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.85 / Unit
View Datasheet →ADC0820CC/D
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.1 / Unit
View Datasheet →AD9200JRLZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADC1175CIMTCX Maximum Ratings & Electrical Characteristics
| Resolution | 8 bits |
| Sampling Rate | 20 MSPS |
| Number of Input Channels | 1 |
| Architecture | Two-Step (Flash + Residue) |
| Supply Voltage (Analog/Digital) | +5 V single supply |
| Power Dissipation (Typical) | 60 mW |
| Effective Number of Bits (ENOB) | 7.5 bits (at Nyquist input) |
| Output Format | Straight Binary, CMOS-compatible |
| Output Enable (OE) Pin | Yes (tri-states outputs) |
| Input Type | Single-ended, with internal T/H |
| Reference Type | Internal reference ladder |
| Package | 24-pin TSSOP |
| Operating Temperature Range | -20 C to +70 C (Commercial Extended) |
| Terminal Form | GULL WING |
| Mounting Type | Surface Mount |
ADC1175CIMTCX Pin Configuration
| Pin 1 | VD — Digital supply voltage (+5V) |
| Pin 2 | GND — Digital ground |
| Pin 3 | D0 — Digital output bit 0 (LSB) |
| Pin 4 | D1 — Digital output bit 1 |
| Pin 5 | D2 — Digital output bit 2 |
| Pin 6 | D3 — Digital output bit 3 |
| Pin 7 | D4 — Digital output bit 4 |
| Pin 8 | D5 — Digital output bit 5 |
| Pin 9 | D6 — Digital output bit 6 |
| Pin 10 | D7 — Digital output bit 7 (MSB) |
| Pin 11 | OE — Output Enable (active high; tri-states outputs when low) |
| Pin 12 | CLK — Clock input (conversion trigger) |
| Pin 13 | GND — Analog ground |
| Pin 14 | VA — Analog supply voltage (+5V) |
| Pin 15 | REF — Reference bypass / decoupling node |
| Pin 16 | VREF — Reference voltage tap (top of internal ladder) |
| Pin 17 | VRT — Reference top (internal ladder) |
| Pin 18 | NC — Not connected |
| Pin 19 | IN — Analog input (single-ended) |
| Pin 20 | NC — Not connected |
| Pin 21 | VRT — Reference top (internal ladder, second tap) |
| Pin 22 | GND — Analog ground |
| Pin 23 | VD — Digital supply voltage (+5V) |
| Pin 24 | GND — Digital ground |
Typical Applications
ADC1175CIMTCX is suitable for 6 applications: Digital Still Camera Image Pipeline, Video Digitizer / Set-Top Box Component Input, Portable Test & Measurement Instrumentation, IF Sampling in Communication Receivers, Ultrasound Imaging Front-End, Industrial Barcode & Machine Vision Scanner.
Digital Still Camera Image Pipeline
The ADC1175CIMTCX digitizes the analog output stream from CCD or CMOS image sensors at 20 MSPS with 7.5 ENOB, providing enough throughput for 1-2 megapixel preview streams. Its 60 mW typical dissipation keeps thermal load low inside sealed camera housings. The +5V single supply aligns with the sensor bias rail, simplifying power-tree design. The integrated Track-and-Hold eliminates a discrete sample/hold stage, reducing PCB area in compact camera modules.
Recommended
Video Digitizer / Set-Top Box Component Input
At 20 MSPS the ADC1175CIMTCX satisfies standard definition video bandwidth (up to ~7 MHz analog bandwidth required), making it suitable for component-video digitizers and set-top box front-ends. The straight-binary CMOS output interfaces directly to MPEG / H.264 encoder ASICs and DSPs without glue logic. Its TSSOP-24 footprint supports compact consumer chassis layouts while 60 mW power keeps wall-adapter thermals comfortable.
Recommended
Portable Test & Measurement Instrumentation
Handheld oscilloscopes, data loggers, and bench-top instruments leverage the ADC1175CIMTCX's 20 MSPS throughput to capture repetitive or transient waveforms in single-shot mode. The 7.5 ENOB figure provides 46 dB of dynamic range - sufficient for general-purpose lab work, while the 60 mW dissipation helps handheld designs achieve > 8 hours of battery life. The OE pin enables bus-sharing with a second ADC in dual-channel instruments.
Recommended
IF Sampling in Communication Receivers
The ADC1175CIMTCX is well suited to intermediate-frequency (IF) sampling at 10-20 MHz in narrowband receivers and software-defined radio front-ends, where aliasing can be intentional and beneficial. Its 60 mW dissipation keeps total receiver power budget low for portable transceivers, and the single +5V supply matches most RF front-end regulators. The 8-bit resolution is adequate for demodulator stages where adjacent-channel rejection is done in DSP.
Recommended
Ultrasound Imaging Front-End
Low-power medical ultrasound carts can use banks of ADC1175CIMTCX converters running at 20 MSPS to digitize multi-channel transducer signals, with the 60 mW per-channel figure enabling dense channel counts on a single PCB. The CMOS-compatible outputs simplify FPGA-based beamformer interfacing, and the 24-TSSOP package keeps each channel footprint under 80 mm^2. Commercial-extended -20 to +70 C temperature range suits cart-based hospital equipment.
Recommended
Industrial Barcode & Machine Vision Scanner
Industrial barcode scanners and machine-vision systems benefit from the ADC1175CIMTCX's ability to sample CCD line-scan outputs at 20 MSPS, capturing each pixel in real time. The TSSOP-24 footprint enables multi-PCB optical-bench stacking, and the +5V supply aligns with industrial 24V-to-5V backplane rails after regulation. The CMOS straight-binary output pairs directly with FPGA frame grabbers without level translation.
Recommended
Recommended Products Summary
Engineering reference data for ADC1175CIMTCX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADC1175CIMTCX/NOPB | ADC1175CIJM | ADC0820CC/D | AD9200JRLZ |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 24-TSSOP | 24-TSSOP - same | 24-TSSOP - same | 24-TSSOP - same | 24-TSSOP - same |
| Resolution | 8 bits | 8 bits (same) | 8 bits (same) | 8 bits (same) | 10 bits (+25%) |
| Sampling Rate | 20 MSPS | 20 MSPS (same) | 20 MSPS (same) | 20 MSPS (same) | 20 MSPS (same) |
| Architecture | Two-Step | Two-Step (same) | Two-Step (same) | Half-Flash | Pipeline |
| Supply Voltage | +5 V | +5 V (same) | +5 V (same) | +5 V (same) | +5 V analog / +3 to +5 V digital |
| Power Dissipation (Typ) | 60 mW | 60 mW (same) | 60 mW (same) | 75 mW (+25%) | 80 mW (+33%) |
| Output Coding | Straight Binary (CMOS) | Straight Binary (same) | Straight Binary (same) | Straight Binary | Straight Binary (CMOS/TTL) |
| Operating Temperature | -20 C to +70 C | -20 C to +70 C | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Same die available in lead-free /NOPB variant (vs ADC1175CIMTCX/NOPB)
- Industrial temperature grade same family (vs ADC1175CIJM)
- Lower power than cross-brand 10-bit alternative (vs AD9200JRLZ)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each VA and VD supply pin, and add a single 10 uF tantalum or ceramic bulk capacitor near the package. Separate analog and digital ground planes with a single-point connection beneath the package GND pin; this minimizes digital switching noise coupling into the analog input. Keep the CLK trace short and impedance-controlled (50 ohm typical) to avoid timing jitter that degrades ENOB.
Drive the ADC1175CIMTCX analog input through a low-impedance op-amp buffer (e.g. OPA1612 or similar) with the input AC-coupled if the source is single-ended. Maintain the analog input amplitude within the linear input range specified by the internal ladder (typically 1 Vp-p full-scale) to avoid saturation; exceeding the input range causes clipping at code 0xFF rather than graceful compression. Source impedance should be kept below 100 ohm to preserve bandwidth at 20 MSPS.
Do not leave the OE pin floating: if left open, it may pick up noise and randomly enable or tri-state the output bus. Tie OE high through a 10 kohm pull-up resistor if permanent enablement is desired. Also avoid exceeding the absolute maximum analog input voltage of VA + 0.3 V, as the ESD diodes can latch up. For multi-ADC parallel designs, ensure each ADC's clock edge is matched within +/- 200 ps to prevent sampling skew.
Compliance Information
Per DigiKey listings and the /NOPB suffix convention, the non-/NOPB ADC1175CIMTCX uses lead-bearing terminals and is non-RoHS. The /NOPB variant is the RoHS-compliant drop-in replacement. AEC-Q100 is not applicable for this commercial-extended data-converter grade.
