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Analog Devices Inc./Maxim Integrated MAX154ACWG
- Part No.:
- MAX154ACWG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX154ACWG.pdf
- Description:
- IC ADC 8BIT FLASH 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
The MAX154ACWG from Maxim Integrated is a high-speed 8-bit analog-to-digital converter with four analog input channels, 2.5µs conversion time per channel, internal 2.5V reference, and single +5V supply operation-designed for real-time data acquisition in digital signal processing and telecom systems.
For engineers reviewing the MAX154ACWG datasheet, MAX154ACWG pinout, MAX154ACWG application, or MAX154ACWG equivalent, this page delivers verified electrical specs, interface timing modes (Mode 0/1), track/hold-integrated architecture, ±1/2 LSB total unadjusted error, and SOIC-24 package–level integration details critical for embedded ADC selection and microprocessor bus interfacing.
Technical Context
The MAX154ACWG implements a half-flash conversion architecture using two 4-bit flash sections and an internal DAC to generate the full 8-bit result in 2.5µs. It integrates a track/hold function and operates without external clocking, relying solely on CS and RD control signals.
Digital interface supports two modes: Mode 0 (WAIT-state compatible, INT- and RDY-driven) and Mode 1 (non-WAIT, pipelined read of prior conversion). Analog input range is 0V to +5V referenced to VREF− = GND and VREF+ = VDD, with input capacitance of 45pF and ±3µA max analog input current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for precise quantization of analog signals. |
| Conversion Time | 2.5µs per channel - enables up to 100kHz sampling rate per channel in MAX154 configuration. |
| Total Unadjusted Error | ±1/2 LSB - ensures monotonicity and no missing codes across full operating temperature range (0°C to +70°C). |
| Reference Output | 2.50V ±3mV - stable on-chip voltage source eliminates need for external reference IC or resistor ladder. |
| Analog Input Range | 0V to +5V - matches standard TTL/CMOS logic swing and simplifies sensor interface design. |
| Supply Voltage | +5V ±5% - operates directly from common system rail without regulation overhead. |
| Input Capacitance | 45pF - defines required source impedance limit (<100Ω) to ensure <1µs settling before conversion latch. |
Pinout & Package
MAX154ACWG is housed in a 24-pin Wide SO (SOIC-24) package, 7.65mm × 10.33mm body size, 0.65mm lead pitch, RoHS-compliant surface-mount outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1–AIN4 | Analog input channels 1–4 | Four single-ended inputs selectable via A0/A1 address lines; multiplexed into shared ADC core. |
| A0, A1 | Multiplexer address inputs | Binary-encoded channel selection (00–11); no A2 pin used in MAX154 (N.C. on pin 23). |
| DB0–DB7 | Three-state digital output bus | Latched 8-bit parallel data outputs compatible with 8-bit microprocessor data buses without glue logic. |
| CS, RD | Digital control inputs | Chip-select and read strobe initiate conversion and enable data access; support both WAIT and non-WAIT microprocessor interfaces. |
| INT, RDY | Status outputs | INT signals conversion completion; RDY (open-drain) drives microprocessor WAIT input for automatic timing synchronization. |
| REF OUT | Internal reference output | 2.5V buffered reference available for external circuitry or as precision bias point. |
| VREF+, VREF− | Reference span terminals | Define zero-code (VREF− = GND) and full-scale (VREF+ = VDD) points; support flexible reference configurations. |
| VDD, GND | Power supply pins | +5V supply and ground; require local 47µF + 0.1µF bypassing for stable conversion performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates external sample-and-hold IC, reducing board area and signal path errors in high-speed acquisition. |
| On-chip 2.5V reference | Provides stable, low-drift reference (60ppm/°C) without external components-critical for portable or space-constrained designs. |
| Memory-mapped or I/O-port interface | Appears as either memory location or peripheral port to microprocessor, removing address decoding logic. |
| Single-supply +5V operation | Removes need for dual ±5V rails, simplifying power architecture and lowering system BOM cost. |
| No external clock required | Self-timed conversion engine reduces EMI sources and eliminates clock distribution complexity. |
Applications
| Digital Signal Processing | High-Speed Data Acquisition |
|---|---|
Use Scenario: Real-time spectral analysis of audio or vibration signals sampled at ≥100kHz. IC Role / Device Role / Timing Role: Primary ADC front-end converting conditioned analog sensor outputs into time-aligned digital streams for FPGA or DSP processing. Use Value: 2.5µs conversion time and built-in track/hold enable accurate capture of fast transients without aperture jitter penalties. | Use Scenario: Multi-channel monitoring of industrial process variables (temperature, pressure, flow) with synchronized sampling. IC Role / Device Role / Timing Role: Centralized analog digitizer interfacing four sensors via multiplexed inputs, coordinated by microcontroller address lines. Use Value: Four integrated channels and ±1/2 LSB accuracy reduce component count versus discrete ADC solutions while maintaining measurement fidelity. |
| Telecommunications | High-Speed Servo Control |
Use Scenario: Speech encoding in voice-over-IP gateways requiring low-latency analog capture and compression. IC Role / Device Role / Timing Role: ADC stage in real-time filtering chain (e.g., Figure 12), digitizing bandpass-filtered speech bands before DSP-based coding. Use Value: Internal 2.5V reference and 0V–5V input range simplify interface to op-amp front-ends driving telecom line-level signals. | Use Scenario: Closed-loop position feedback in CNC motion controllers where encoder analog outputs must be sampled synchronously with PWM updates. IC Role / Device Role / Timing Role: High-reliability ADC capturing analog tachometer or resolver signals at servo update rates up to 100kHz. Use Value: Single +5V supply and robust noise immunity (200µVrms output noise) ensure stable feedback under electrically noisy motor drive conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit, multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.4µs conversion, SPI interface, 2.7–5.25V supply, no internal reference | Requires external reference and level-shifting for 5V microcontrollers; better suited for low-power battery systems | Select when serial interface and wider supply range outweigh need for integrated reference and parallel bus compatibility. |
| MAX1113ECM | 2.5µs conversion, 4-channel, +3V/+5V dual-supply option, ±1 LSB error | Higher error spec and requires separate analog/digital supplies; lacks RDY/INT status outputs | Choose only if 3V system compatibility is mandatory and timing-critical READY signaling is not required. |
Compared with ADS7822U and MAX1113ECM, the MAX154ACWG uniquely combines parallel microprocessor bus interface, on-chip 2.5V reference, and RDY/INT handshaking-making it optimal for legacy 8-bit controller designs needing minimal external components and deterministic timing.
Availability
MAX154ACWG is available at Aetrix Electronics and suitable for digital signal processing, high-speed data acquisition, and telecommunications applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for MAX154ACWG 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.
The MAX154ACWG belongs to Maxim's high-speed data acquisition product line, engineered for applications demanding fast, accurate digitization with minimal external components and direct microprocessor integration.
FAQ
What is the operating temperature range for the MAX154ACWG?
The MAX154ACWG is specified for operation from 0°C to +70°C. This commercial-grade temperature range is indicated by the "C" suffix in the part number and aligns with its intended use in industrial control panels, test equipment, and telecom infrastructure where ambient thermal conditions remain within standard room-temperature envelopes. The device maintains ±1/2 LSB total unadjusted error across this full range.
Does the MAX154ACWG require an external clock signal?
No, the MAX154ACWG does not require an external clock. Its conversion timing is fully self-contained and initiated by control signals CS and RD. The internal half-flash architecture executes the complete 8-bit conversion in a fixed 2.5µs window without external timing dependencies-reducing system-level clock routing complexity and EMI concerns. This makes the MAX154ACWG especially suitable for noise-sensitive or space-constrained applications.
How many analog input channels does the MAX154ACWG support?
The MAX154ACWG supports four analog input channels (AIN1 through AIN4), selected via the A0 and A1 address inputs. Unlike the 8-channel MAX158, the MAX154ACWG omits A2 and uses only two address bits-making it ideal for compact systems where four sensor inputs suffice and PCB layout simplicity is prioritized. Pin 23 is designated N.C. (no connect) in the MAX154ACWG SOIC-24 package.
Can the MAX154ACWG operate with a 3.3V microprocessor interface?
The MAX154ACWG's digital outputs (DB0–DB7, INT, RDY) are CMOS-compatible with VOH ≥ 4.0V and VOL ≤ 0.4V at VDD = +5V, so direct connection to a 3.3V microprocessor data bus risks overvoltage damage or logic misreads. Level-shifting or bus-interface buffers are required. However, its control inputs (CS, RD, A0, A1) accept VIH ≥ 2.4V and VIL ≤ 0.8V, making them tolerant of 3.3V logic levels when driven from such a processor.
What is the purpose of the REF OUT pin on the MAX154ACWG?
REF OUT provides a buffered 2.5V reference voltage derived from the internal bandgap circuit, specified at 2.47V to 2.53V with ±10mV load regulation. It serves dual roles: (1) as a precision bias point for external signal-conditioning circuitry (e.g., op-amp offset nulling), and (2) as a stable reference for auxiliary ADCs or DACs sharing the same system. Loading beyond 30mA is prohibited, and a 0.01µF ceramic capacitor to GND is mandatory for stability.
MAX154ACWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX154ACWG FAQ
1.How can I place an order for MAX154ACWG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX154ACWG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX154ACWG reliable?
The price and inventory of MAX154ACWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX154ACWG is usually 5 days.
3.What payment methods are accepted for MAX154ACWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX154ACWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX154ACWG?
MAX154ACWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX154ACWG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX154ACWG?
For technical support, including MAX154ACWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX154ACWG requirements.
6.How does Aetrix verify that MAX154ACWG is sourced from the original manufacturer or authorized distributors?
All MAX154ACWG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX154ACWG meets industry standards.
7.What is the process for return or replacement of MAX154ACWG?
All MAX154ACWG units undergo pre-shipment inspection (PSI). If there is an issue with MAX154ACWG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX154ACWG part is unused and in its original packaging.
Return procedure for MAX154ACWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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