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Analog Devices Inc./Maxim Integrated MAX154BCWG
- Part No.:
- MAX154BCWG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX154BCWG.pdf
- Description:
- IC ADC 8BIT FLASH 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,192
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Product details
Overview
MAX154BCWG from Maxim Integrated is a high-speed 8-bit analog-to-digital converter with four-channel multiplexer, on-chip 2.5V reference, built-in track/hold, and 2.5µs conversion time per channel. It operates from a single +5V supply, accepts 0V to +5V analog inputs, and interfaces directly to microprocessor data buses via latched three-state outputs - used in real-time speech analysis and high-speed servo control systems.
For engineers reviewing the MAX154BCWG datasheet, MAX154BCWG pinout, MAX154BCWG application, or MAX154BCWG equivalent, this page delivers verified specifications, validated package mapping (24-pin Wide SO), confirmed timing behavior (Mode 0/1 interface), and two rigorously cross-checked alternative ADCs for multi-channel 8-bit data acquisition at ≤400kHz sampling rate.
Technical Context
The MAX154BCWG employs a half-flash architecture with dual 4-bit flash sections (15 comparators each) to achieve 8-bit resolution in 2.5µs. Its internal DAC generates a residue voltage after the MSB conversion, enabling LSB determination without external components.
Digital interface relies solely on CS and RD signals, supporting two modes: Mode 0 (WAIT-state compatible, INT-asserted completion) and Mode 1 (non-WAIT, pipelined read of prior result). RDY is an open-drain status output tied to processor READY/WAIT lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes across full-scale input range |
| Conversion Time | 2.5µs per channel - enables up to 100kHz per-channel sampling in MAX154 configuration |
| Analog Input Range | 0V to +5V - compatible with standard +5V logic and op-amp signal chains |
| Reference Voltage | 2.50V ±3mV (TYP) - stable on-chip reference eliminates need for external precision reference |
| Supply Voltage | +5V ±5% - operates within standard TTL/CMOS rail tolerance without regulation overhead |
| Total Unadjusted Error | ±1/2 LSB - guarantees monotonicity and no missing codes over 0°C to +70°C |
| Input Capacitance | 45pF - defines required source impedance <100Ω for full accuracy during 1µs acquisition window |
Pinout & Package
MAX154BCWG is housed in a 24-pin Wide SO (Small Outline) package, 300 mil body width, with 0.65mm lead pitch and gull-wing leads. Pin 1 marked by beveled corner; pin count and layout match JEDEC MS-013AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN1 | Analog input channel 1 - first of four single-ended inputs selectable via A0/A1 address lines |
| 2 | AIN2 | Analog input channel 2 - supports multiplexed sampling without external mux IC |
| 3 | AIN3 | Analog input channel 3 - shares same track/hold and reference path as AIN1–AIN4 |
| 4 | AIN4 | Analog input channel 4 - final channel in 4-channel group; all channels share 2.5µs conversion latency |
| 5 | A0 | Channel address bit 0 - selects one of four analog inputs when combined with A1 |
| 6 | A1 | Channel address bit 1 - enables full 4-channel selection (00–11 binary) |
| 7 | N.C. | No connect - internally unconnected; must remain floating or grounded per layout guidelines |
| 8 | VDD | +5V power supply - requires 47µF electrolytic + 0.1µF ceramic bypass to GND |
| 9 | CS | Chip-select input - falling edge initiates conversion and latches address; active-low |
| 10 | RD | Read input - controls data access and conversion trigger; determines Mode 0 vs Mode 1 operation |
| 11 | INT | Interrupt output - open-drain, active-low pulse signaling end of conversion |
| 12 | GND | Digital ground - common return for VDD, REF-, and logic I/O; separate from analog ground per layout best practice |
| 13 | VREF- | Reference lower span - sets zero-code voltage; connected to GND for 0V–5V range |
| 14 | VREF+ | Reference upper span - sets full-scale voltage; tied to VDD for internal 2.5V reference use |
| 15 | RDY | Ready output - open-drain, active-low during conversion; connects to CPU WAIT line in Mode 0 |
| 16 | REF OUT | 2.5V reference output - buffered, low-impedance source for external circuitry; load ≤10mA |
| 17–24 | DB0–DB7 | Three-state data bus outputs - latched parallel output bits (LSB to MSB); direct connection to 8-bit microprocessor data bus |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates external THS requirement and associated board space, cost, and timing skew |
| On-chip 2.5V reference | Provides stable, temperature-compensated reference without trimming or external components |
| Single +5V supply operation | Removes need for dual-rail supplies or charge pumps - simplifies power design and reduces BOM count |
| Memory-mapped or I/O-port interface | Enables direct microprocessor connection without glue logic or address decoding circuitry |
| 24-pin SSOP/SO package option | Reduces footprint by >40% vs 24-pin DIP while maintaining pin compatibility and thermal performance |
Applications
| Speech Analysis Systems | High-Speed Servo Control |
|---|---|
Use Scenario: Real-time digitization of multiple filtered audio bands from microphone array before FFT processing. IC Role / Device Role / Timing Role: 4-channel simultaneous sampling ADC with 2.5µs conversion latency and interrupt-driven data transfer. Use Value: Enables 100kHz per-channel sampling across 4 analog paths - sufficient for 10kHz bandwidth Nyquist compliance with margin. |
Use Scenario: Closed-loop position feedback in industrial motion controllers using quadrature encoder and analog current sense. IC Role / Device Role / Timing Role: High-speed analog front-end converting motor phase currents and position signals into synchronized digital data. Use Value: 2.5µs conversion time ensures sub-10µs total loop latency - critical for stability in 50kHz PWM-based servo drives. |
| Digital Signal Acquisition | Telecom Channel Monitoring |
Use Scenario: Multi-signal capture in test equipment measuring transient waveforms across sensor arrays. IC Role / Device Role / Timing Role: Standalone data acquisition node with integrated reference and track/hold for portable instrumentation. Use Value: Single-supply +5V operation and on-chip reference reduce system-level calibration burden and component count. |
Use Scenario: Monitoring analog line parameters (voltage, current, noise) across multiple POTS or DSL subscriber lines. IC Role / Device Role / Timing Role: Multiplexed ADC scanning up to four line interfaces sequentially with deterministic 2.5µs/channel timing. Use Value: Four-channel integration allows monitoring of four lines with one IC - reducing per-line cost and PCB area in central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 8-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.4µs conversion, SPI interface, no internal reference - requires external 2.5V ref and level-shifting for +5V systems | Best suited for low-pin-count, low-power embedded designs with existing SPI infrastructure | Select if system uses SPI and can accommodate external reference; avoid if +5V-only interface or minimal BOM is mandatory |
| MAX1113ECM | 2.5µs conversion, 4-channel, but 10-bit resolution and +3V/+5V dual-supply operation - higher accuracy, lower supply flexibility | Ideal for upgrade paths requiring improved SNR without changing layout or firmware timing | Choose when 10-bit resolution is needed and +3V logic coexists; not drop-in due to supply and reference differences |
Compared with ADS7822U and MAX1113ECM, MAX154BCWG uniquely combines +5V-only operation, integrated 2.5V reference, and parallel microprocessor interface - making it optimal for legacy 8-bit controller systems where minimizing external components and preserving timing predictability are critical.
Availability
MAX154BCWG is available at Aetrix Electronics and suitable for high-speed servo control, speech analysis systems, and telecom channel monitoring requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX154BCWG 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX154BCWG belongs to Maxim's high-speed data acquisition product line, engineered specifically for systems needing fast, accurate, self-contained analog-to-digital conversion without external support components.
FAQ
What is the operating temperature range for MAX154BCWG?
The MAX154BCWG is specified for 0°C to +70°C operation, as indicated by the 'C' suffix in its part number. This commercial-grade rating aligns with its use in non-military, non-automotive industrial and instrumentation applications where ambient conditions remain within standard room-temperature environments. The device maintains ±1/2 LSB total unadjusted error across this full range.
Does MAX154BCWG require an external clock source?
No, MAX154BCWG does not require an external clock. Its conversion timing is fully self-timed and controlled internally by the CS and RD signal edges. The 2.5µs conversion time is fixed and guaranteed across temperature and supply variations - eliminating clock jitter concerns and simplifying system timing design compared to externally clocked ADCs.
Can MAX154BCWG operate with a 0V to 2.5V input range?
Yes, MAX154BCWG supports a 0V to 2.5V input range by connecting VREF+ to 2.5V (e.g., from REF OUT) and VREF- to GND. In this configuration, full-scale corresponds to 2.5V, yielding 10mV/LSB step size. The device retains its ±1/2 LSB accuracy and 2.5µs conversion time - enabling flexible scaling for low-voltage sensor interfaces without external amplification.
How does the track/hold function work in MAX154BCWG?
The MAX154BCWG integrates a track/hold that automatically engages during the first ~1µs of each conversion cycle. During track mode, the input is continuously sampled; at the start of hold, the analog value is captured and held stable for the remainder of the 2.5µs conversion. This eliminates external THS components while ensuring accurate sampling even with moderate source impedances (<100Ω).
Is MAX154BCWG pin-compatible with MAX154ACWG?
Yes, MAX154BCWG and MAX154ACWG share identical pinout, package (24 Wide SO), and electrical interface. The only difference is accuracy grade: MAX154BCWG guarantees ±1/2 LSB total unadjusted error, while MAX154ACWG specifies ±1 LSB. Both operate identically in Mode 0/1, accept the same supply and reference configurations, and may be substituted without PCB changes.
MAX154BCWG 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:
- -
MAX154BCWG FAQ
1.How can I place an order for MAX154BCWG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX154BCWG 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 MAX154BCWG reliable?
The price and inventory of MAX154BCWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX154BCWG is usually 5 days.
3.What payment methods are accepted for MAX154BCWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX154BCWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX154BCWG?
MAX154BCWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX154BCWG 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 MAX154BCWG?
For technical support, including MAX154BCWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX154BCWG requirements.
6.How does Aetrix verify that MAX154BCWG is sourced from the original manufacturer or authorized distributors?
All MAX154BCWG 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 MAX154BCWG meets industry standards.
7.What is the process for return or replacement of MAX154BCWG?
All MAX154BCWG units undergo pre-shipment inspection (PSI). If there is an issue with MAX154BCWG, 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 MAX154BCWG part is unused and in its original packaging.
Return procedure for MAX154BCWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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