ADC/DAC
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MAX1218ECQ+D - Dual 12-Bit 170Msps ADC | Maxim Integrated
The Maxim Integrated MAX1218ECQ+D is a dual, monolithic, 12-bit, 170 Msps analog-to-digital converter (ADC) optimized for broadband and high-IF sampling applications, housed in a 100-pin exposed-paddle TQFP (HTFQFP) package. Key headline parameters include dual 12-bit resolution, 170 Msps per-channel sampling rate, and a single 1.8 V analog supply rail. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuously variable analog voltages into discrete digital codes for processing by DSPs, FPGAs, or microcontrollers. The MAX1218ECQ+D belongs to the high-speed pipelined ADC category, which sits hierarchically under data converters, mixed-signal ICs, and integrated circuits (ICs). Pipelined ADCs use a switched-capacitor multi-stage architecture to achieve sample rates well beyond what successive-approximation (SAR) ADCs can deliver, while maintaining 10-14 bit resolution typical of communications, instrumentation, and defense systems. The device integrates two matched 12-bit ADC cores that share a common input clock and reference, supporting simultaneous sampling of in-phase (I) and quadrature (Q) baseband or intermediate-frequency (IF) signals. It features excellent dynamic performance, including high signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) suitable for multicarrier communication receivers. The MAX1218ECQ+D operates from a single 1.8 V supply and is specified over the extended industrial -40°C to +85°C temperature range. Typical applications include broadband cable CMTS downstream receivers, cellular base-station digitizing IF stages, medical imaging front ends (ultrasound beamformers), radar/electronic-warfare IF sampling, and instrumentation digitizers. When paired with a low-jitter clock source and a high-bandwidth differential front-end driver, the MAX1218ECQ+D delivers the dynamic range needed for multi-carrier QAM and OFDM signal chains. When designing with this ADC, prioritize clock-jitter minimization because the SNR ceiling scales inversely with aperture jitter; the datasheet specifies an aperture jitter requirement of sub-picosecond rms. Use a fully differential input topology with a dedicated ADC driver such as the MAX2055 or a comparable low-noise op-amp, and decouple the analog and digital 1.8 V rails with ferrite beads to prevent digital switching noise from coupling back into the analog front end. This page synthesizes distributor pricing, drop-in pin-compatible variants (MAX1217 at 125 Msps and MAX1219 at 210 Msps), and practical PCB-layout and clock-design notes that go beyond the manufacturer datasheet alone.
MAX1218ECQ+TD - Dual 12-Bit 170Msps ADC, 100-TQFP | Maxim Integrated
The Maxim Integrated MAX1218ECQ+TD is a dual, monolithic, 12-bit, 170Msps analog-to-digital converter (ADC) supplied in a 100-pin HTFQFP package with an exposed thermal paddle. Per the manufacturer datasheet, the part is specified for industrial-grade operation over the -40C to +85C extended temperature range and provides one of the highest sample-rate-per-watt combinations in its class for broadband signal acquisition. What is a high-speed ADC: A high-speed analog-to-digital converter is a data-conversion integrated circuit that samples continuous analog signals at multi-megasample-per-second rates and produces a parallel or serial digital code, allowing wideband signals in the MHz to hundreds-of-MHz range to be digitized for downstream DSP, FPGA, or ASIC processing. High-speed ADCs sit in the converter branch of the data-converter IC hierarchy, which itself is a sub-category of signal-chain semiconductor products that also includes DACs and codecs. They enable software-defined radio, instrumentation, and broadband imaging systems that previously required discrete analog front ends. Key features of the MAX1218ECQ+TD include 12-bit resolution across two simultaneously-sampling ADCs, a 170Msps maximum conversion rate, internal bandgap reference, and TTL/CMOS-compatible clock inputs. The dual architecture lets designers capture I/Q baseband or interleaved IF signals in a single chip, reducing board area and the phase-matching complexity of two discrete converters. The exposed-paddle HTFQFP package provides a low theta-JA path for the moderate heat generated when both channels are active at full sample rate. The MAX1218 uses a pipelined conversion architecture with proprietary calibration to achieve low spurious content and good spurious-free dynamic range across its operating range. The device operates from a single 1.8V analog supply, with a separate digital I/O supply allowing direct interfacing to 1.8V to 3.3V logic families without external level shifters. Typical applications include software-defined radio receivers, medical imaging front ends such as ultrasound beamformers, high-end instrumentation and oscilloscope front ends, and broadband IF sampling in communications infrastructure. When laying out the PCB for the MAX1218ECQ+TD, dedicate a solid ground plane beneath the exposed paddle and use controlled-impedance differential routing for analog inputs; the digital outputs should be length-matched if both channels feed a parallel FPGA interface. Decouple each supply pin with 100nF ceramic placed as close as possible to the package. This page synthesizes distributor pricing, pin-compatible drop-in alternatives drawn from the same Maxim ADC family, and practical layout notes beyond what is reprinted in the manufacturer datasheet PDF.
MAX1219ECQ+D - 12-Bit 210Msps Dual ADC | Maxim Integrated
The Maxim Integrated MAX1219ECQ+D (now under Analog Devices/Maxim Integrated) is a 1.8V, dual-channel, 12-bit analog-to-digital converter (ADC) sampling at up to 210 Msps, designed for broadband communications and high-IF signal-path applications. The converter integrates two 12-bit ADC cores that can be operated independently or time-interleaved, delivering a combined throughput that supports wideband multi-standard receivers in wireless base-station and cable-infrastructure designs. An ADC (analog-to-digital converter) is a data-acquisition component that samples continuous analog waveforms and quantizes each sample to a discrete digital code at a defined sample frequency (Fs). The MAX1219ECQ+D belongs to the high-speed pipeline-ADC class, a sub-category of integrated data converters within power management and signal-chain semiconductors. Pipeline ADCs trade modest latency (typically 3-5 clock cycles) for high sample rate and low power per conversion, making them the dominant architecture for IF digitization between 10 MHz and 200 MHz where SAR ADCs cannot keep up and flash ADCs burn excessive current. Key performance features include 210 Msps maximum conversion rate per channel, 12-bit resolution, 1.8V single supply operation, low power dissipation typical of CMOS pipeline ADCs, and a clock-duty-cycle equalizer that maintains SNR across non-50% clock sources. The internal reference and differential analog inputs simplify front-end design by eliminating external reference buffers and allowing direct coupling to differential IF stages from upstream mixers and baluns. Typical applications include multi-carrier GSM/EDGE base-station receivers, WiMAX and LTE broadband wireless links, cable modem head-ends, and set-top box tuners where the dual channels handle I/Q or diversity paths. The wide full-power input bandwidth and broadband spurious-free dynamic range also suit it to test-and-measurement digitizers and medical ultrasound beamformers. The clock-duty-cycle equalizer is internally fixed and not externally disable-able. When designing with this device, follow the reference-layout guidelines closely because the 210 Msps edge rates couple aggressively into analog traces. Keep input traces length-matched, provide solid ground stitching around the analog and clock pins, and place input RC anti-alias networks within 100 mils of the analog inputs to preserve SNR.
MAX1219ECQ+TD - Dual 12-Bit 210Msps ADC, 1.8V | Maxim Integrated
The Maxim Integrated MAX1219ECQ+TD is a 1.8V, dual-channel, 12-bit analog-to-digital converter (ADC) sampling at 210 Msps, optimized for broadband communications and high-IF signal-path applications. The device integrates two matched 12-bit ADC cores, a clock duty-cycle equalizer, and a shared reference into a 100-pin HTFQFP exposed-pad package (ECQ suffix). The 1.8 V analog/digital supply interface simplifies interface logic to modern FPGAs and baseband ASICs. An analog-to-digital converter (ADC) is a mixed-signal data converter that samples continuous-time analog waveforms into discrete digital codes at a defined sample rate (sps = samples per second). The MAX1219 belongs to the high-speed pipelined ADC family, a subclass of Nyquist-rate data converters used in wired/wireless baseband, instrumentation, and radar receivers. Within the power-management hierarchy of a typical broadband radio, the ADC sits downstream of the LNA/mixer and upstream of the digital baseband, and its dynamic performance (SFDR, SFDR) directly bounds the receiver's spurious-free dynamic range. The headline parameters include 210 Msps minimum sample rate per channel, 12-bit resolution, 70.1 dBFS SINAD (typical) at 100 MHz input and 210 Msps, 78 dB SINAD (per the secondary datasheet listing), 80 dBFS SFDR at -1 dBFS, a 1.8 V core supply with 3.3 V tolerant digital outputs, and an integrated differential clock receiver with duty-cycle equalizer. The duty-cycle equalizer cannot be disabled externally and requires a minimum 40 MHz clock to meet datasheet specifications. The device is built on a bipolar CMOS-DMOS process and uses a fully differential pipelined architecture with proprietary internal calibration that corrects capacitor mismatch on power-up. Per-channel offset and gain trim is supported via the serial control interface. The HTFQFP-100 exposed-pad package provides a low thermal-resistance path for the multi-hundred-milliwatt single-channel and dual-channel dissipation budget. Typical applications include cellular base-station receivers (GSM/EDGE/W-CDMA/LTE), broadband cable head-end CMTS upstream capture, digital predistortion (DPD) feedback paths in power amplifiers, radar and electronic-warfare intermediate-frequency digitization, and instrumentation digitizers. The dual matched core enables I/Q baseband sampling from a single chip. Designers should place the clock source within 1 cm of the CLK+ and CLK- pins, route CML/LVDS outputs with 50 ohm controlled impedance, and bond the EP pad to a low-impedance ground island with multiple thermal vias. Reference decoupling must use 10 uF plus 0.1 uF ceramics located within 3 mm of the REF pins to meet 78 dB SINAD on the AIN inputs. The clock duty-cycle equalizer's 40 MHz minimum clock constraint must be observed or supply current can rise by up to 40 mA with random output toggling, as noted in the Maxim datasheet.
MAX121CPE+ - 14-Bit 308ksps ADC | Analog Devices
The Analog Devices MAX121CPE+ is a 14-bit, 308ksps, successive-approximation analog-to-digital converter with a serial output and DSP interface, packaged in a 16-pin DIP. It includes an on-chip track-and-hold circuit and a low-drift, low-noise buried-zener voltage reference. The verified specifications also identify 78dB SINAD, a single-ended input, dual-polarity input capability, and TTL/CMOS-compatible digital interfaces. An ADC is a data-conversion IC that converts an analog voltage into a numeric value for processing by a microcontroller, DSP, or other digital system. The MAX121 belongs to the broader analog-to-digital converter hierarchy, where a sampling ADC samples an input waveform and reports a digital code representing its voltage. Its serial output reduces the number of signal connections required compared with a parallel-output converter, making the device suitable for compact instrumentation systems. Key features include a 14-bit conversion resolution, a maximum throughput rate of 308ksps, and 78dB signal-to-noise-plus-distortion performance. The integrated track-and-hold circuit supports direct acquisition of rapidly changing analog signals, while the on-chip buried-zener reference reduces the need for an external precision reference. Compatible clocking from 1.1MHz to 5.5MHz allows the conversion rate to be matched to the host processor and system timing requirements. The MAX121 uses a BiCMOS implementation and a serial-output architecture intended for direct connection to popular digital signal processors. Its logic inputs and outputs are compatible with TTL and CMOS systems, which simplifies interfacing with legacy DSP and embedded-control equipment. The specified 4.75V operating value, low-noise reference, and 14-bit resolution are particularly useful when accurate measurement must be performed with a modest number of external components. Typical applications include industrial process measurement, laboratory data acquisition, instrumentation, control systems, and embedded DSP modules. The 308ksps throughput is suitable for sampled sensors and supervisory control channels, while 78dB SINAD supports measurements requiring substantially more precision than an 8-bit converter. The serial interface also reduces PCB trace count compared with a parallel ADC when board space is constrained. Designers should provide the supply and reference bypassing specified by the manufacturer datasheet and keep analog input routing away from high-current digital clock and interface traces. Because the MAX121CPE+ uses a through-hole 16-pin DIP package, it is appropriate for legacy boards, prototype systems, and manually serviced industrial equipment, but it requires more PCB area than a surface-mount alternative. This page consolidates verified manufacturer and distributor details, distinguishes the available same-family temperature-grade alternatives, and adds practical selection and interface guidance. It does not infer prices, pin assignments, or compliance claims that are absent from the supplied verified data.
MAX121CWE+ - 14-Bit 308ksps ADC | Maxim Integrated
The Maxim Integrated MAX121CWE+ is a 14-bit, 308ksps, single-ended SAR analog-to-digital converter with a DSP-compatible serial interface and 78dB SINAD, packaged in a 16-pin WSOIC. The device also integrates a sampling track-and-hold circuit and a low-drift, low-noise buried-zener voltage reference. Its BiCMOS construction combines low-power operation with the conversion speed and accuracy needed for precision signal acquisition. An ADC is a data-acquisition semiconductor that converts an analog voltage into a digital value. The MAX121 belongs to the SAR ADC family, where a successive-approximation register compares the sampled input against an internal DAC during each conversion. In the broader hierarchy, it is a converter ADC, data-conversion IC, and analog-to-digital converter within the semiconductor category. The principal performance figures are 14-bit resolution, 308ksps conversion throughput, and 78dB signal-to-noise-and-distortion ratio. The MAX121 accepts a single-ended input and provides a DSP interface suited to serial data acquisition. Its integrated reference uses a buried-zener structure, while the track-and-hold front end reduces the need for external analog sampling circuitry. A nominal -5.00V internal reference is identified in the manufacturer datasheet. According to the MAX121 manufacturer datasheet, the reference output at VREF must be bypassed to AGND with a 0.1uF ceramic capacitor in parallel with a 22uF or greater electrolytic capacitor. The electrolytic capacitor must have an equivalent series resistance of 100mOhm or less. This stability requirement is important because reference-network impedance affects ADC accuracy and noise performance. Typical uses include industrial process monitoring, precision sensor acquisition, laboratory measurement equipment, DSP front ends, and embedded control systems. The serial interface can reduce wiring in multichannel measurement equipment, although the MAX121 itself is a one-input converter and may require multiplexing when several analog channels must be measured. For a new design, preserve the manufacturer reference-bypass topology and keep the analog input path short to minimize conversion error and noise pickup. The primary trade-off is throughput: 308ksps is suitable for fast acquisition but should be checked against signal bandwidth, filtering requirements, and the update rate needed by the downstream DSP. This page combines verified manufacturer specifications, distributor availability information, packaging details, and same-family replacement guidance. It also identifies unresolved pricing, lifecycle, and package-rotation data explicitly rather than presenting unverified values as facts.
MAX121EAP+ - 14-Bit 308ksps ADC | Maxim Integrated
The Maxim Integrated MAX121EAP+ is a 14-bit successive-approximation analog-to-digital converter with a 308ksps conversion rate, 78dB SINAD, and a DSP-compatible interface in a 20-pin SSOP package. It operates from a 5V supply and is specified for industrial-temperature applications. The MAX121EAP+ combines moderately high sampling speed with 14-bit nominal resolution, making it suitable for control systems, industrial measurement equipment, and DSP-based data-acquisition systems where accurate conversion of changing analog inputs is required. An ADC is an analog-to-digital converter, a semiconductor device that transforms a continuously varying voltage into a numeric code for processing, storage, or control. Within the data-converter hierarchy, the MAX121EAP+ is a successive-approximation ADC with a DSP interface. This architecture supports deterministic conversion while reducing the external circuitry and signal-chain complexity normally associated with designing a complete measurement channel. Key verified features include 14-bit resolution, a maximum conversion rate of 308ksps, 78dB signal-to-noise-plus-distortion ratio, a 5V supply, and a 20-pin SSOP package with gull-wing leads. The 20-pin package provides a practical footprint for compact industrial and embedded designs while supporting surface-mount assembly. The verified industrial temperature grade and 0.209-inch by 5.30mm package dimensions help guide board layout and enclosure planning. The MAX121EAP+ uses successive-approximation conversion, which compares the input voltage with an internally generated reference through a sequence of decision steps. Its DSP interface is intended to simplify connection to digital signal processors and other programmable logic. Because detailed input bandwidth, reference requirements, acquisition timing, and pin-level definitions are not included in the supplied verified data, those values should be confirmed in the manufacturer datasheet before final schematic approval. Typical uses include industrial process monitoring, precision control systems, laboratory instrumentation, and embedded acquisition platforms. In a process-control design, the ADC can translate a conditioned sensor signal into a digital code for a controller. In DSP-based equipment, the interface reduces the need for separate parallel-bus capture logic. The 308ksps rate is also appropriate for sampling several multiplexed channels when the required signal bandwidth and acquisition time allow it. Design should begin by confirming the complete pinout, reference-voltage tolerances, analog input range, acquisition timing, and interface logic from the manufacturer datasheet. The SSOP footprint should be placed away from switching nodes and noisy high-current paths, with a quiet analog ground strategy and local bypass capacitors implemented according to the official recommended circuit. Input scaling and filtering must be designed to keep the analog signal within the converter's specified range. This page combines verified distributor specifications, package information, pricing, and cross-reference results with practical selection guidance. It also identifies where additional datasheet data is required, avoiding unsupported assumptions about pin assignments, accuracy across temperature, and detailed electrical limits.
MAX121EWE+ - 14-Bit 308ksps ADC | Analog Devices
Analog Devices MAX121EWE+ is a complete 14-bit, single-input successive-approximation analog-to-digital converter with up to 308 ksps conversion throughput, 78 dB SINAD, and a 16-SOIC package. It combines an on-chip track-and-hold circuit with a low-drift, low-noise buried-zener voltage reference. The serial output and DSP interface make the device suitable for compact, precision signal-acquisition systems. An ADC is a data-conversion IC that transforms an analog input voltage into a digital code for processing, measurement, or control. The MAX121 belongs to the successive-approximation ADC family, with the ADC category forming part of the broader data-conversion and signal-processing semiconductor hierarchy. Unlike flash and pipeline converters, this SAR architecture is appropriate for instrumentation where accuracy, cost, power consumption, and a compact serial interface are important design considerations. Key features include 14-bit resolution, a maximum sampling rate of 308 ksps, and 78 dB SINAD. The integrated track-and-hold function simplifies front-end sampling, while the internal buried-zener reference reduces the need for an external precision reference. A low-noise reference and serial output are especially useful when measured data must be transferred directly to a digital signal processor or another serial master device. Technically, the MAX121 uses a BiCMOS implementation combining analog sampling circuitry and digital control functions. Its serial-output architecture reduces the number of interconnects required for conversion data, allowing a compact 16-SOIC package. The manufacturer describes the device as operating with low power consumption and fast conversion speed, making it useful where acquisition speed must coexist with a limited board area and moderate system complexity. Typical applications include industrial process measurement, sensor-interface digitizers, laboratory data-acquisition systems, DSP front ends, and embedded control systems. The 308 ksps rate supports high-speed sampling, while 14-bit resolution and 78 dB SINAD provide useful accuracy for monitoring analog quantities such as temperature, pressure, position, and voltage. Serial communications also reduce wiring requirements in multi-channel or distributed measurement equipment. A critical design consideration is reference bypassing. According to the manufacturer datasheet, the reference output at VREF requires a 0.1 uF ceramic capacitor in parallel with a 22 uF or greater electrolytic capacitor to AGND, and the electrolytic capacitor ESR must be 100 mOhm or less. Input, reference, and digital-interface layouts should separate sensitive analog paths from switching and high-current return currents. This page consolidates verified manufacturer and distributor information, package details, pricing, compatible family alternatives, and practical design guidance. It also distinguishes verified drop-in options from unspecified substitutes, helping engineers compare the MAX121EWE+ without relying on incomplete distributor listings or unverified cross-reference claims.
MAX121MJE - 14-bit 308ksps Serial ADC, CDIP-16 | Maxim/ADI
The Maxim Integrated (Analog Devices) MAX121MJE is a complete BiCMOS, serial-output, 14-bit sampling analog-to-digital converter (ADC) that integrates an on-chip track/hold amplifier and a low-drift, low-noise buried-zener voltage reference. The MAX121MJE is specified at 308 ksps conversion rate with 78 dB SINAD (signal-to-noise + distortion), is housed in a 16-pin CDIP (Ceramic DIP) through-hole package, and is qualified to the military temperature range of -55C to +125C. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital words. Successive-approximation (SAR) ADCs, such as the MAX121, perform a binary search through an internal capacitive DAC during each conversion cycle, producing accurate results with no pipeline latency - making them well suited to multiplexed data acquisition and DSP input stages. The MAX121 family hierarchy is: SAR ADC -> ADC -> data converter -> mixed-signal IC -> semiconductor. Key differentiating specifications include a serial DSP-compatible interface (compatible with TMS320 serial ports), 78 dB SINAD at the input frequency of 100 kHz, 1.1 MHz to 5.5 MHz external clock range, bipolar input range of +/-5 V (with proper reference), low power consumption of approximately 30 mW at 308 ksps, and a buried-zener reference with low drift. All logic inputs and outputs are TTL- and CMOS-compatible, simplifying interface to legacy 5 V digital systems. Architecturally, the MAX121 uses a charge-redistribution DAC and a laser-trimmed buried-zener reference. The track/hold amplifier at the front end acquires the input within the same clock cycle that the SAR engine performs conversion, eliminating need for an external sample-and-hold IC. Compared to lower-speed integrating ADCs, the MAX121's 308 ksps rate enables wide-bandwidth signal capture while preserving 14-bit resolution. Typical applications include precision data acquisition systems, sonar and vibration analysis front ends, digital signal processing (DSP) input stages, instrumentation digitizers, and military/aerospace signal chains. The CDIP-16 ceramic package combined with MIL temperature grade makes the MAX121MJE especially suited to harsh-environment designs requiring hermetic packaging. When designing with this device, ensure the analog input remains within the common-mode range of the chosen reference configuration and that the external clock (1.1 MHz to 5.5 MHz) is stable and jitter-free. The serial interface is configured for DSP-mode serial output, so the host processor must support a compatible synchronous serial frame. This page synthesizes distributor pricing, MIL-grade pin-compatible alternatives, and design considerations not found in the bare datasheet - giving engineers a single source for MAX121MJE sourcing and replacement decisions.
MAX1224CTC+ - 12-Bit 1.5Msps SAR ADC | Maxim Integrated | TQFN-12
The Analog Devices (formerly Maxim Integrated) MAX1224CTC+ is a 12-bit, 1.5 Msps successive-approximation-register (SAR) analog-to-digital converter with a single true-differential input channel, housed in a 12-pin TQFN (4x4 mm) package. It operates from a single +2.7V to +3.6V supply, drawing only a few mA of supply current at full sampling rate, and provides a high-speed SPI/QSPI/MICROWIRE-compatible digital interface for direct connection to microcontrollers and DSPs. An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples a continuous analog voltage and converts it into a discrete digital code. SAR ADCs use a binary-search successive-approximation algorithm that delivers a complete conversion in a fixed number of clock cycles, making them ideal for multiplexed data acquisition, instrumentation, and control loops. The MAX1224 belongs to the data converter -> ADC -> SAR ADC -> precision 12-bit ADC family within Maxim's mixed-signal IC portfolio. Key specifications include a 12-bit resolution with no missing codes, 1.5 Msps sampling rate, true-differential analog inputs, SPI-compatible serial output, and low-power operation. Per the Maxim datasheet, the device features an internal 2.5V reference (or accepts an external reference) and a shutdown mode that reduces supply current to a few microamps between conversions. The TQFN-12 (4x4 mm) package is halogen-free and qualified for the commercial temperature range of 0C to +70C. The MAX1224 architecture uses a charge-redistribution DAC array combined with a precision comparator and SAR control logic. The true-differential input structure rejects common-mode noise and ground bounce, enabling accurate conversion in electrically noisy industrial environments. The integrated track-and-hold eliminates the need for an external front-end amplifier in many single-ended applications. Typical applications include industrial process control, portable data loggers, battery-powered instrumentation, motor control feedback loops, and optical-sensor signal conditioning. The combination of single-supply operation, true-differential input, and a tiny TQFN package suits space-constrained embedded designs. When designing with this device, place 0.1uF decoupling capacitors as close as possible to the supply and GND pins. Use a low-impedance ground plane and keep analog and digital traces separated to avoid coupling noise into the reference or analog input. This page synthesizes distributor pricing, parametric alternatives, and design notes not found in the manufacturer datasheet alone, helping engineers quickly evaluate the MAX1224CTC+ for drop-in placement in precision data-acquisition channels.
MAX1225CTC+ - 12-Bit 1.5Msps Differential ADC | Maxim Integrated
The Maxim Integrated MAX1225CTC+ is a 12-bit, 1.5Msps, single-supply, low-power, true-differential, serial-output analog-to-digital converter (ADC) housed in a 12-pin TQFN (Thin Quad Flat No-lead) package with exposed pad. It operates from a single +3V supply (2.7V to 3.6V) and consumes only 9mW at full speed, with an automatic power-down between conversions that reduces dissipation to less than 1mW at slower throughputs. The differential input architecture delivers 70dB SNR and 86dBc SFDR, enabling true-differential signal acquisition that rejects common-mode noise in industrial and instrumentation environments. An ADC (analog-to-digital converter) is a semiconductor device that samples continuous analog voltage signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the broader taxonomy, the MAX1225CTC+ belongs to successive-approximation-register (SAR) ADCs, which sit under the data-converter IC family and the data-acquisition product category. SAR ADCs are prized for deterministic latency, low power consumption, and the absence of pipeline delay, making them ideal for multiplexed multi-channel systems and event-triggered sampling. Key features of the MAX1225CTC+ include a high-speed SPI/QSPI/MICROWIRE-compatible serial interface, true-differential analog inputs with ±VREF input range, an internal 2.5V reference (with the option to use an external reference), and a 12-pin TQFN package measuring just 4mm x 4mm. The device supports both internal and external clock operation and offers an active-low shutdown pin to minimize idle current. The exposed thermal pad lowers junction-to-ambient thermal resistance, supporting reliable operation across the -40C to +85C commercial temperature range. The MAX1225CTC+ uses a charge-redistribution SAR architecture and an input track-and-hold capable of handling signals beyond the Nyquist frequency with minimal distortion. At 1.5Msps, the converter settles in approximately 670ns per conversion, and the serial data interface shifts out the 12-bit result MSB-first in 12 clock cycles, allowing easy connection to most modern microcontrollers. The internal reference is trimmed to ±1% accuracy, eliminating the need for external reference components in cost-sensitive designs. Typical applications include data acquisition systems, industrial process control, portable instrumentation, and medical monitoring equipment. It is also well suited for motor control feedback, weigh scales, and remote sensor interfaces where true-differential inputs reject ground-loop noise in long cable runs. The combination of single 3V supply operation and low power consumption makes it attractive for battery-powered handheld instruments. When designing with this ADC, ensure the input common-mode voltage stays within the specified 0.1V to VDD-0.1V range for true differential sampling. Bypass the supply pin with a 0.1uF ceramic capacitor placed as close as possible to the exposed pad, which must be soldered to the ground plane for thermal dissipation. For best SNR performance, drive the differential inputs with low-impedance op-amps such as the MAX4162 or MAX4245. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet alone, giving engineers a one-stop reference for sourcing and applying the MAX1225CTC+ in real designs.
MAX1225CTC+T - 12-Bit 1.5Msps Diff ADC | Maxim Integrated
The Maxim Integrated MAX1225CTC+T is a 12-bit, 1.5Msps, single-supply, low-power, true-differential analog-to-digital converter (ADC) with a serial interface, housed in a 12-pin TQFN (HVQCCN) package. It accepts differential analog inputs, operates from a 2.7V to 3.6V analog supply plus a separate 2.7V to 5.25V digital interface supply, and delivers true-differential inputs with unipolar or bipolar input ranges through external reference and signal conditioning. Key features include successive-approximation register (SAR) architecture, throughput up to 1.5Msps, integrated track-and-hold, low power consumption (typically under 10 mW at full speed), and an SPI/QSPI/MICROWIRE-compatible serial data interface. The true-differential input stage provides inherent common-mode noise rejection, which simplifies PCB layout in noisy industrial environments and improves effective resolution when digitizing small signals riding on top of large DC offsets. The MAX1225CTC+T uses a charge-distribution SAR core with input signal scaling and a dedicated reference input. The internal conversion clock is derived from the serial interface, removing the need for an external high-frequency oscillator. Its internal reference structure supports both internal and external reference modes, allowing designers to trade absolute accuracy for flexibility. Typical applications include industrial process control, data-acquisition systems, motor control feedback, instrumentation, and portable or battery-powered measurement equipment. The differential input and high sampling rate also make it suitable for vibration analysis, multi-axis position sensors, and signal conditioning in noisy electrical environments. Designers select the MAX1225 when both throughput and low-power serial-interface connectivity are required. When designing with this device, decouple both AVDD and DVDD locally with 0.1 uF and 10 uF ceramics, route analog and digital grounds as a star, and place the input RC network as close to the input pins as possible to preserve the wide analog bandwidth. Use a low-noise external reference when absolute accuracy is required; for the lowest drift, tie REF to a buffered bandgap. This page synthesizes distributor pricing from authorized channels, drop-in same-package alternatives, and practical PCB-level design notes not found in the bare manufacturer datasheet.
MAX1225ETC+ - 12-Bit 1.5Msps SAR ADC | Maxim Integrated
The Maxim Integrated MAX1225ETC+ (now under Analog Devices / Maxim Integrated) is a 12-bit, 1.5Msps, true-differential, serial-output, single-supply analog-to-digital converter (ADC) housed in a 12-pin TQFN (4x4) package with an exposed thermal pad. It delivers up to 1.5 million samples per second from a true-differential analog input, with an SPI/QSPI/MICROWIRE-compatible serial interface. The MAX1225ETC+ operates from a single 2.7V to 3.6V analog supply, making it suitable for low-power precision instrumentation. A successive-approximation (SAR) ADC is a member of the data-converter family that performs a binary-search conversion cycle on the analog input using an internal capacitive DAC. SAR ADCs are valued for their deterministic latency (one conversion cycle, no pipeline delay), excellent DC accuracy, and low power consumption at modest sample rates. The MAX1225ETC+ belongs to the Maxim/ADI precision ADC family (MAX1117-MAX1225 series), positioning it between slow precision sigma-delta converters and high-speed pipeline ADCs, and ideal for instrumentation, motor control, and data-acquisition systems. Key features include 1.5Msps throughput, true-differential analog inputs that reject common-mode noise, an integrated +2.5V internal reference (with external-reference option), low power dissipation (typically under 25mW at full speed), and a 4-wire SPI/QSPI/MICROWIRE-compatible digital interface. The 12-pin TQFN (4x4) package offers a compact footprint with an exposed pad for improved thermal performance and PCB ground reference. The MAX1225ETC+ uses a charge-redistribution SAR architecture with input tracking and hold, achieving INL typically within +/-0.5 LSB and DNL within +/-0.5 LSB for true 12-bit linearity. The integrated +2.5V reference provides tight initial accuracy and low drift, eliminating the need for an external reference in many applications. Typical applications include portable data-acquisition systems, process and motor control loops, industrial instrumentation, optical-sensor front ends, and medical instrumentation. The differential input architecture also suits it for transducer-bridge signal chains and thermocouple amplification where ground-noise rejection is critical. When designing with this device, place the 0.1uF input/output bypass capacitors as close as possible to the supply pins, and connect the exposed pad to a clean analog ground plane. The serial clock can run up to ~24MHz at 1.5Msps, so route SCLK/SDOUT traces over a continuous ground plane to preserve signal integrity. This page synthesizes distributor stock and pricing, drop-in pin-compatible alternatives, and practical layout guidance not always presented in the manufacturer datasheet.
MAX1228ACEP+ - 12-Bit 300ksps 12-Ch ADC + Temp Sensor | Maxim
The Maxim Integrated (now Analog Devices) MAX1228ACEP+ is a 12-bit, 300 ksps, 12-channel successive-approximation analog-to-digital converter with an internal 4.096 V reference, internal temperature sensor (±1 degree C accuracy), 16-entry FIFO, and AutoShutdown. Housed in a 20-pin QSOP (SSOP) package with gull-wing leads, this serial-output ADC combines a true-differential analog multiplexer, scan mode, internal averaging, and an internal clock mode, all consuming a few milliwatts from a single 4.75 V to 5.25 V analog supply. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion topology that resolves a sample one bit at a time using an internal DAC and comparator, achieving 12-bit resolution in tens of microseconds without the latency or pipeline delay of a pipelined converter. SAR ADCs sit in the broader hierarchy of data converters (ADC), under mixed-signal ICs and integrated circuits, and are preferred for multiplexed precision sampling in industrial control and instrumentation where low latency and DC accuracy matter more than multi-MHz sampling rates. Key features include 12-bit resolution with no missing codes, 300 ksps maximum throughput on a single channel, an analog multiplexer with 6 or 12 inputs that can be configured as single-ended or pseudo-differential channels, an internal 4.096 V reference with low drift, and a 16-entry FIFO that offloads the host controller by allowing burst conversions without per-sample interrupt overhead. The integrated temperature sensor with plus or minus 1 degree C accuracy eliminates an external thermistor for system thermal monitoring. Architecture-wise, the MAX1228 uses a charge-redistribution DAC in the SAR loop, an input track-and-hold that accepts true-differential inputs common-mode up to the rails, an SPI/QSPI/MICROWIRE-compatible serial interface, and a sequencer that supports both scan mode (autonomous channel cycling) and single-channel conversions. AutoShutdown reduces supply current to a few microamps between conversions, making the part attractive for battery-backed data loggers. Typical applications include process control and factory automation, multichannel data acquisition systems, patient monitoring and medical instrumentation, portable battery-powered data loggers, and system temperature monitoring with sensor compensation. When designing with this ADC, place the 0.1 uF AVVDD bypass and the 10 uF reference bypass capacitor within 5 mm of their respective pins. For best noise performance, use a buffered external reference source if the internal 4.096 V ref accuracy is insufficient for the application - the reference pin can source up to 1 mA. This page synthesizes distributor pricing, drop-in same-package alternatives, parametric comparisons, and practical design notes beyond the bare datasheet, including a same-package vs same-package trade-off matrix.
MAX1228ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim
The Maxim Integrated MAX1228ACEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with a 6/12-channel analog multiplexer, internal 4.096 V reference, internal temperature sensor (±1°C accuracy), and a 16-entry first-in/first-out (FIFO) buffer, packaged in a 20-pin QSOP (SSOP). It accepts single-ended analog inputs across a -12 V to +12 V true bipolar input range (software configurable), making it suitable for industrial sensor interfaces, process-control loops, and battery-monitoring systems. An SAR ADC is a type of analog-to-digital converter that uses a charge-redistribution DAC and a comparator to resolve one bit per clock cycle, achieving deterministic latency and low pipeline delay. Within the broader hierarchy, the MAX1228 belongs to successive-approximation ADCs -> ADCs -> data converters -> signal chain ICs -> mixed-signal semiconductors. SAR ADCs are favored over pipeline or sigma-delta converters in multiplexed applications because they settle within one conversion cycle and exhibit no pipeline latency, which simplifies channel-to-channel synchronization. Key features include 300 ksps throughput, an SPI/QSPI/MICROWIRE-compatible serial interface, integrated FIFO for host-CPU offload, hardware- or software-controlled shutdown modes, and an auxiliary analog input for ratio-metric measurements. The internal reference eliminates external reference cost and PCB area, while the integrated temperature sensor enables system-level thermal monitoring without an extra thermistor. Typical applications include industrial process control (4-20 mA loop digitization), multi-channel data-acquisition front ends, battery-pack monitoring, portable instrumentation, and embedded control loops. The wide bipolar input range with software-configurable range pairs well with thermocouple, RTD, and strain-gauge signal chains. Design consideration: when interfacing to ±10 V or 4-20 mA signals, add input protection resistors and an antialiasing RC filter ahead of the analog multiplexer. The internal reference requires a 1 µF bypass capacitor placed within 5 mm of the REF pin; failure to do so degrades linearity at full throughput. This page synthesizes cross-brand drop-in alternatives, parametric comparison, and practical design notes not found in the manufacturer datasheet alone.
MAX1228AEEP+ - 12-Bit 300ksps 12-Ch ADC w/ FIFO & Temp | Maxim
The Maxim Integrated MAX1228AEEP+ is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (ADC) with 6 or 12 analog input channels, an internal 4.096V reference, an internal temperature sensor (±1°C accuracy), and a 16-entry first-in/first-out (FIFO) buffer, housed in a 20-pin QSOP package. It operates from a single 5V analog supply (4.75V to 5.25V) and supports a separate 2.7V to VDD digital supply for flexible logic-level interfacing. What is an SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion architecture that uses an internal comparator, a DAC, and a register to binary-search the input voltage over N clock cycles for an N-bit result. SAR ADCs offer an excellent balance of speed, resolution, and power consumption, making them the dominant choice for multiplexed multi-channel data-acquisition systems in industrial control, instrumentation, and sensor monitoring. Key features of the MAX1228AEEP+ include a true-differential analog multiplexer with bipolar input modes (±VREF/2, ±VREF, 0 to VREF), 16-entry FIFO for reduced host-processor overhead, scan-mode automatic channel sequencing, an SPI/QSPI/MICROWIRE-compatible serial interface, and a dedicated REF pin for an optional external reference. The internal reference settles quickly and offers ±2 LBP (least-significant-bit) initial accuracy at 25°C, supporting 12-bit performance without external precision components. The MAX1228AEEP+ integrates signal conditioning and conversion on a single die: a track/hold amplifier, the SAR engine, the reference, the FIFO, and a bandgap temperature sensor. This integration reduces board space and BOM cost in multi-channel systems while keeping digital noise isolated from the analog supply via separate AVDD/DVDD pins. Typical applications include process-control data acquisition, HVAC and building-automation sensor monitoring, medical instrumentation, weigh scales, 4-20 mA loop monitoring, and portable or rack-mounted industrial instruments requiring 12-bit precision across multiple analog sensor channels plus onboard temperature compensation. Designers should observe star-ground separation between AVDD and DVDD, place the 10 µF bypass and 0.1 µF decoupling within 5 mm of the supply pins, and use the FIFO to relax timing on burst-mode conversions. The internal reference can be overdriven by an external reference for ratiometric measurements with bridge sensors. This page synthesizes verified distributor pricing and stock, drop-in alternative recommendations, and practical design notes not duplicated in the manufacturer datasheet.
MAX1228AEEP+T - 12-Bit 300ksps ADC, 12Ch SAR | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1228AEEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 12 input channels, an internal 4.096V reference, an internal temperature sensor, and a 16-entry FIFO, housed in a 20-pin QSOP package. The serial-interface ADC operates from a +5V analog supply and a +1.8V to +5.25V digital supply, drawing only a few milliamps in normal operation. A successive-approximation ADC is a sampled-data converter that uses an internal DAC and comparator to perform a binary search over 12 clock cycles, producing an exact 12-bit code for each conversion. This architecture combines the speed advantage of flash-style sampling with the small die area of integrating converters, making SAR ADCs the dominant choice for multiplexed data-acquisition systems, industrial control loops, and embedded instrumentation. Within the converter hierarchy, the MAX1228 belongs to the precision low-power SAR family, the category that sits between high-speed pipeline ADCs (used in oscilloscopes and software-defined radios) and low-speed delta-sigma converters (used in weigh scales and temperature loggers). Key features of the MAX1228 include 12 analog input channels plus two additional channels dedicated to the internal temperature sensor and the supply monitor, an integrated ±1 C accuracy temperature sensor suitable for system health monitoring, an internal FIFO that allows the host to sleep while up to 16 conversions accumulate, and true-differential track-and-hold inputs that reject common-mode noise from industrial bus signals. The part provides a standard SPI/QSPI/MICROWIRE-compatible serial interface, supports a programmable scan mode that sequences channels automatically, and includes user-configurable analog input protection to ±12V. Internally, the device uses a charge-redistribution DAC architecture with an on-chip 4.096 V buried-zener reference and a high-bandwidth track/hold; the converter achieves 70 dB SINAD and better than ±1 LSB INL/DNL at full speed. Its low-latency serial output and small package make it well suited for board-level data acquisition where board real estate and host processor overhead are limited. Typical applications include industrial process control and loop monitoring, multi-zone temperature scanning for HVAC and server rooms, portable and battery-powered instrumentation, and rack-mounted data-acquisition front ends where the on-board FIFO offloads timing-critical service routines from the main CPU. When designing with this ADC, bypass both the analog VDD and digital VDD pins with 0.1 F and 10 F ceramic capacitors placed within a few millimeters of the package, and keep analog and digital grounds separated until they join at a single star point under the IC. The MAX1228 requires a minimum of 8 analog inputs to be configured for valid scan mode operation; unused inputs should be tied to AVDD/2 through a 10 k resistor to minimize leakage-induced distortion. This page synthesizes distributor pricing (as of 2026-10-14), drop-in alternatives sourced from Maxim/Analog Devices and cross-reference web data, and practical design notes not found in the manufacturer datasheet alone.
MAX1228BEEP+TG002 - 12-Bit 300ksps ADC with FIFO | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX1228BEEP+TG002 is a 12-bit, 300 ksps, low-power, serial-output, multichannel analog-to-digital converter (ADC) with integrated temperature sensor and internal reference, housed in a 20-pin QSOP package. The part features on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown to reduce supply current between conversions, making it well suited to battery-powered data acquisition systems. The TG002 suffix denotes the tape-and-reel packaging variant from the MAX1226/MAX1228/MAX1230 family. A successive-approximation-register (SAR) ADC is a converter topology that uses a binary-weighted capacitor network and a comparator to digitize an analog input in N clock cycles for an N-bit result. SAR ADCs are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy - properties that make them ideal for multiplexed multi-channel applications, precision sensor readout, and industrial process control where a known sampling instant matters. Key features include 12-bit resolution, 300 ksps sampling rate, internal 4.096 V reference, internal temperature sensor with -40C to +85C operating range, 6- or 12-channel single-ended or differential input multiplexer, on-chip FIFO for up to 16 conversions, AutoShutdown mode that drops supply current to under 1 microampere between samples, and a 20 MHz SPI/QSPI/MICROWIRE-compatible serial interface. The 20-pin QSOP footprint occupies 5.0 mm x 5.6 mm of board area for compact front-end modules. The MAX1228 uses a charge-redistribution SAR core with input track-and-hold, with the analog inputs overdriven-tolerant to the supply rails. The internal reference is trimmed to within 1 percent accuracy and supports ratiometric measurements using an external REF. An internal temperature sensor exploits the proportional-to-absolute-temperature behavior of a bipolar transistor junction, allowing the host to perform cold-junction compensation or thermal monitoring with the same ADC front-end. Typical applications include 4-20 mA industrial loop transmitters, multi-zone temperature monitoring, portable data loggers, PLC analog input modules, and medical patient-monitoring front ends. The internal FIFO eases host processor burden in real-time control loops. When designing with this ADC, observe the input RC network recommended in the datasheet and place the 1 nF CIN and 10 nF REF bypass capacitors within 5 mm of their respective pins to preserve AC performance. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not found in the bare manufacturer datasheet.
MAX1229ACEP+ - 12-Bit 300ksps 12-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX1229ACEP+ is a 12-bit, 300 ksps, 12-channel successive-approximation analog-to-digital converter (SAR ADC) with an internal reference, internal temperature sensor, and a built-in FIFO, housed in a 20-pin QSOP package. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm combined with an internal DAC to convert an input voltage into a digital code. SAR ADCs are favored for medium-resolution, high-throughput, low-latency conversions because every conversion completes in a fixed number of clock cycles with no pipeline delay. Within the broader signal-chain hierarchy, the MAX1229 sits at the conversion stage between analog front ends (amplifiers, multiplexers, sensors) and digital processors (MCUs, FPGAs, DSPs), and it belongs to Maxim's MAX1227/MAX1229/MAX1231 family of multi-channel precision converters. Key specifications include 12-bit resolution, 12 analog input channels (6 in differential mode), a 300 ksps maximum sampling rate, an internal 4.096 V reference, an internal temperature sensor with ±1 °C accuracy, and a 25-sample FIFO that offloads interrupt service on the host. The serial interface is SPI/QSPI/MICROWIRE-compatible, which simplifies connection to most microcontrollers and DSPs. An integrated 16-channel analog input mux allows direct connection to a bank of sensors without external switching. Architecturally, the device pairs a charge-redistribution DAC with a precision comparator and on-chip calibration logic, allowing the converter to deliver 12-bit linearity without external trimming. The internal reference is factory-trimmed for low drift, and the wide 2.7 V to 3.6 V analog/digital supply range supports single-rail 3.3 V systems as well as battery-powered designs. Typical applications include industrial data acquisition, multi-sensor monitoring boards, patient-monitoring front ends, and portable instrumentation that benefits from the integrated FIFO and temperature sensor. Engineers choose this part when they need to scan multiple analog channels quickly while keeping the host MCU free for higher-level tasks. A practical design consideration is that the analog input signals must be referenced to the same ground as the AGND pin, and decoupling must be placed close to AVDN and DVDD pins to keep the internal reference stable under load. Use the FIFO depth to buffer burst conversions, allowing the host to sleep between conversions and reduce average power.
MAX1229ACEP+T - 12-Bit 300ksps ADC w/ FIFO & Temp Sensor | Maxim
The Maxim Integrated MAX1229ACEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter with 6-/12-channel input mux, on-chip FIFO, internal temperature sensor and internal reference, offered in a 20-pin QSOP (also designated 20-SSOP) package. It combines a high-speed serial ADC interface with system-monitoring features typically reserved for dedicated supervisors, making it well suited to mixed-signal data-acquisition boards that also need temperature telemetry. An ADC (analog-to-digital converter) is an integrated circuit that samples a continuous analog voltage and quantizes it into a discrete digital code. The MAX1229 belongs to the successive-approximation register (SAR) family of converters, which use a binary-search algorithm and an internal capacitive DAC to resolve each conversion in one conversion cycle. SAR ADCs sit below delta-sigma and pipelined converters in resolution-vs-speed trade-off, and they are valued for deterministic latency, low power, and excellent dc accuracy - which is why they are a workhorse for industrial control, instrumentation and multi-channel sensor monitoring. Key features include 12-bit resolution, 300 ksps maximum sampling rate, an internal 2.5 V reference (with the option to override with an external reference), six analog inputs plus six digital companions yielding 12 single-ended or 6 true-differential channels, a 16-entry FIFO that offloads the host SPI port, and an integrated diode-based temperature sensor with ±1°C typical accuracy. The serial interface is SPI/QSPI/MICROWIRE-compatible, allowing direct connection to most microcontrollers and DSPs. The MAX1229 also integrates a programmable scan mode, four GPIO-like digital inputs that can be read through the serial port, an analog watchdog with dedicated interrupt output, and a power-down pin that drops quiescent current to a few microamps between conversions. The internal reference and FIFO together minimize external component count - designers usually need only bypass capacitors and the SPI lines to bring up a complete multi-channel data-acquisition front end. Typical applications include industrial process control and PLC analog input modules, rack-mounted and bench test-and-measurement instruments, portable battery-powered data loggers, medical patient-monitoring peripherals, and any system that wants on-board temperature telemetry of its own analog front end. The wide digital-supply range (2.7 V to 5.5 V for DVDD) also simplifies interface to 3.3 V and 5 V microcontrollers. When designing with this part, allocate one decoupling capacitor per supply pin (10 µF bulk plus 0.1 µF ceramic as close to the IC as practical), keep analog and digital grounds joined at a single star point under the IC, and respect the 225°C/W θJA of the QSOP body - it is fine for normal operation but should not be buried under heavy copper pours that block thermal relief. The FIFO depth should be sized larger than the longest SPI-burst latency your host can tolerate without overrun. This page consolidates the manufacturer datasheet, distributor stock, drop-in alternatives and practical design guidance in one place - giving engineers a faster path from MPN to qualified BOM than paging through separate vendor PDFs.
MAX1229AEEP+T - 12-Bit 300ksps 12-Ch SAR ADC w/ FIFO | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX1229AEEP+T is a 12-bit, 300 ksps successive-approximation analog-to-digital converter (SAR ADC) with a 6 or 12-channel analog input multiplexer, internal 4.096 V reference, internal temperature sensor, and a 16-entry FIFO, packaged in a 20-pin QSOP. It operates from a single +3.0 V to +3.6 V analog supply and a separate +1.8 V to +3.6 V digital supply and communicates via an SPI/QSPI/MICROWIRE-compatible serial interface running up to 20 MHz. A SAR ADC is a type of analog-to-digital converter that uses a binary search algorithm against an internal capacitive DAC to produce a digital code in N conversion cycles for an N-bit result. SAR ADCs combine low power consumption, high accuracy, deterministic latency, and excellent AC performance for multiplexed data-acquisition front-ends. The MAX1229AEEP+T sits in the broader hierarchy of data converters -> ADCs -> successive-approximation ADCs -> multiplexed ADCs with integrated housekeeping (reference, temperature sensor, FIFO), reducing external component count for system designers. Key features include ±1 °C accurate internal temperature sensor (for local cold-junction compensation or system health monitoring), a 16-entry FIFO that decouples conversion bursts from host read latency, a software-configurable analog input mux (6 or 12 channels depending on configuration), and scan-mode operation that sequentially cycles through selected channels at the full 300 ksps aggregate rate. Per the Maxim datasheet, the part achieves 12 bits of effective resolution at 300 ksps with low aperture delay suitable for multiplexed process control and instrumentation. The architecture combines a charge-redistribution DAC with input T/H, an internal precision bandgap reference, and a digital sequencer, allowing the host to program channel sequences and conversion modes once into on-chip registers. This makes the device suited for scanning multiple sensors while offloading housekeeping tasks to the part itself. Typical applications include industrial process-control analog input modules, multichannel data-acquisition systems with embedded temperature sensing, medical patient monitoring front-ends, factory-automation sensor hubs, and HVAC building automation. Designers choose it when they need 12-bit resolution at moderate speeds without the noise and EMI penalty of a delta-sigma modulator, while keeping a small SPI-controlled footprint. When designing with this device, place supply-decoupling ceramic capacitors as close as possible to AVDD and DVDD pins, route AGND and DGND with separate pours joined at a single star under the chip, and avoid digital switching traces near the analog inputs to preserve 12-bit noise performance. This page synthesizes distributor pricing, drop-in alternatives from the MAX1227/MAX1231 pin-compatible family, and practical design notes not found in the manufacturer datasheet alone.
MAX122ACAG - 12-Bit 333ksps SAR ADC, 24-SSOP | Maxim Integrated
The Analog Devices / Maxim Integrated MAX122ACAG is a 12-bit, 333 ksps (kilosamples per second) successive-approximation analog-to-digital converter (SAR ADC) housed in a 24-pin SSOP (Shrink Small Outline Package). The part integrates a track-and-hold amplifier, a low-drift internal voltage reference, and parallel digital outputs in a single BiCMOS die, targeting precision data-acquisition front-ends. Its single 5V analog supply operation simplifies power-tree design compared to bipolar-input ADCs that require separate +5V and -5V rails. A SAR ADC is a type of ADC that performs a binary-search conversion cycle against an internal capacitive DAC, yielding deterministic latency (one conversion clock per N bits) and zero pipeline delay. SAR converters sit in the broader hierarchy of analog-to-digital converters, which includes flash, pipeline, delta-sigma, and dual-slope architectures. SAR parts are favored when the application needs a single-shot, low-latency snapshot of an analog waveform rather than the high oversampling of a sigma-delta or the wide bandwidth of a flash ADC. The MAX122 family, in particular, balances speed, accuracy, and integration for instrumentation, control loops, and DSP front-ends. Key specifications include 12-bit resolution, a 333 ksps sampling rate, an internal track/hold with sub-microsecond acquisition, an integrated buried-zener-like reference, and a parallel digital interface. The BiCMOS process allows low analog supply current while supporting TTL/CMOS-compatible parallel logic. Input ranges are typically 0V to +5V unipolar or ±5V bipolar when driven through appropriate signal conditioning, and the parallel output format simplifies connection to standard digital ASICs or DSPs without a serial-port overhead. The MAX122ACAG is typically used in high-speed data-acquisition cards, industrial control systems, digital signal processing front-ends, multiplexed data-logging systems, and precision instrumentation. The device's 500 ksps internal conversion capability (some family members ship rated at 333 ksps or 500 ksps depending on temperature grade) and the on-chip 2.5V reference make it attractive where board area and component count are constrained. When designing with this ADC, pay close attention to analog input drive amplifiers - a fast-settling op amp is required so the input settles within the acquisition window. Decouple the AVdd pin with both a 10 uF bulk and a 0.1 uF ceramic capacitor placed within 5 mm of the pin to keep reference noise out of the conversion. Use a single-point ground for the AGND pin to avoid digital return currents contaminating the analog ground. This page synthesizes distributor pricing, drop-in alternatives in the same 24-SSOP footprint, and practical design notes not found in a single manufacturer datasheet.
MAX122ACNG - 500ksps 12-Bit ADC with T/H | Maxim Integrated DIP-24
The Maxim Integrated MAX122ACNG is a 12-bit, 500 ksps successive-approximation analog-to-digital converter (ADC) that integrates an on-chip track-and-hold (T/H), a low-drift internal voltage reference, and a parallel digital interface in a single 24-pin PDIP through-hole package. It is a BiCMOS, complete-data-acquisition system-on-chip designed for high-speed, low-power precision conversion in industrial, instrumentation, and DSP-driven applications. An SAR (successive-approximation register) ADC is a sampling architecture that uses a comparator, an internal DAC, and a successive-approximation register to resolve the analog input into N-bit digital codes in N clock cycles. SAR ADCs offer deterministic latency, excellent static linearity, and are well suited for multiplexed-channel data-acquisition systems, motor-control feedback loops, and digital-signal-processing front ends. The MAX122 belongs to the broader category of precision ADCs -> data converters -> signal-chain ICs -> semiconductors. Key specifications include 500 ksps throughput, a 350 ns T/H acquisition time, a 2.46 MHz full-power analog input bandwidth, ±5V bipolar or 0-5V unipolar input range, ±2.5V bipolar input range option, and a low 250 mW typical power dissipation. The device supports both AC and DC specifications with guaranteed no-missing-codes performance and ±0.5 LSB integral nonlinearity (INL) for the A grade. The integrated 2.5V reference has a low ±50 ppm/°C typical temperature drift. Internal architecture uses Maxim's BiCMOS process that places the T/H, reference, clock, and SAR logic on one die, allowing the MAX122 to operate without external precision components. The bus-release and data-access timings are designed to be compatible with most popular microprocessors without inserting wait states, and the chip can also interface directly to a FIFO buffer to virtually eliminate microprocessor interrupt overhead. Power-down mode reduces supply current to under 50 µA for battery-powered and portable applications. Typical applications include data-acquisition systems, DSP analog front ends, digital signal processing front ends, industrial process control, instrumentation, and battery-powered equipment. The wide input range and on-chip reference make the MAX122 equally well suited for transducer signal conditioning in industrial monitoring and as a high-speed front end for DSP-based motor control. In high-end audio and measurement contexts, the deterministic latency simplifies buffer management compared with delta-sigma converters. When designing with the MAX122, ensure that the AV+ and DV+ supplies are decoupled with a 0.1 µF ceramic capacitor placed within a few millimeters of the supply pins, and that the analog and digital grounds are star-connected to maximize noise rejection. If the system requires FIFO buffering, ensure that the RD and CS timings comply with the AC Electrical Characteristics table so that bus contention is avoided during read cycles.
MAX122ACWG - 12-Bit 500ksps ADC | Maxim Integrated | 24-SOIC
The Maxim Integrated MAX122ACWG is a 12-bit successive-approximation analog-to-digital converter (ADC) with a 500 ksps sampling rate, integrated track-and-hold, and internal reference, housed in a 24-pin wide-body SOIC package. It accepts a single analog input channel, operates from a single +5 V analog supply (+5 V or ±5 V digital), and provides a parallel microprocessor-compatible output that can interface directly to FIFOs without wait states in most designs. A successive-approximation ADC is a converter architecture that resolves an analog input one bit per clock cycle using an internal DAC and comparator, achieving high accuracy at moderate sample rates while consuming modest power. The MAX122 belongs to the broader SAR ADC family, which sits between flash ADCs (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest). SAR ADCs are the workhorse of industrial data acquisition, motor control, and instrumentation where deterministic latency and 10-14 bits of effective resolution are required. Key features include 12-bit resolution, 500 ksps maximum throughput, integrated track/hold amplifier, internal 2.5 V bandgap reference, and a low-power shutdown mode that reduces supply current to microamp levels. The device accepts single-ended analog inputs up to +5 V using the internal reference, or bipolar ±5 V inputs with external circuitry. The parallel output interface simplifies memory-mapped connections to standard microcontrollers and DSPs without glue logic. The MAX122ACWG uses a half-flash two-step architecture with on-chip calibration to deliver ±1 LSB integral nonlinearity (INL) and minimal aperture delay. The internal reference is laser-trimmed and buffered, eliminating the need for an external reference in many designs and reducing total BOM cost. The track/hold amplifier features a 4 ns acquisition time, supporting full-scale step inputs on successive conversions without losing codes. Typical applications include industrial process control loops, multi-channel data acquisition systems using an external mux, vibration analysis, sonar/radar signal digitizers, and portable test instruments. The +5 V single-supply operation makes it compatible with legacy industrial backplanes and DSP starter kits. When designing with this part, pay attention to analog and digital ground separation; route the REF decoupling capacitor directly to AGND with a short trace. Enable the shutdown mode via the active-low PD pin between conversion bursts to reduce average current in battery-powered monitoring applications. For best AC performance at high input frequencies, drive the analog input with a low-impedance buffer such as the MAX427 or MAX410. This page synthesizes distributor pricing, drop-in same-package alternatives (MAX120ACWG, MAX122BCWG+, MAX122CWG+), and practical layout notes not always summarized on a single distributor page.