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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:235
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Product details
Overview
The MAX154BCWG+ from Maxim Integrated is a high-speed 8-bit analog-to-digital converter with four-channel multiplexer, 2.5 µs conversion time, internal 2.5 V reference, and single +5 V supply operation-designed for real-time data acquisition in telecom and servo control systems.
For engineers reviewing the MAX154BCWG+ datasheet, MAX154BCWG+ pinout, MAX154BCWG+ application, or MAX154BCWG+ equivalent, this page delivers verified electrical specs, SSOP-24 pin mapping, timing-critical interface behavior (Mode 0/1), and validated alternatives for industrial embedded signal chain design.
Technical Context
The MAX154BCWG+ uses a half-flash architecture with two 4-bit flash ADC sections and an internal DAC to generate 8-bit results in 2.5 µs. It integrates a track/hold function and supports both Mode 0 (WAIT-state microprocessor interface) and Mode 1 (non-WAIT sequential read) via CS and RD control only.
Analog input range is 0 V to +5 V referenced to VREF− and VREF+, with ±1/2 LSB total unadjusted error at 0°C to +70°C. The on-chip 2.5 V reference (±3 mV load regulation, 60 ppm/°C drift) drives the conversion ladder and is buffered at REF OUT with 30 mA sink/source capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - provides 256 discrete digital codes over full-scale input range |
| Conversion Time | 2.5 µs - enables up to 100 kHz per-channel sampling in MAX154 configuration |
| Total Unadjusted Error | ±1/2 LSB - ensures monotonicity and no missing codes across operating temperature |
| Reference Output | 2.50 V ±3 mV - stable internal reference eliminates need for external precision voltage source |
| Supply Voltage | +5 V only - single-supply operation simplifies power rail design and reduces BOM count |
| Analog Input Range | 0 V to +5 V - matches standard TTL/CMOS logic swing and op-amp output ranges |
| Operating Temperature | 0°C to +70°C - commercial-grade rating suitable for non-automotive industrial environments |
Pinout & Package
MAX154BCWG+ is housed in a 24-pin Wide SOIC (SO-24) package, 7.65 mm × 10.33 mm body size, 1.27 mm lead pitch, with gull-wing leads and moisture sensitivity level 3.
| 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 - second multiplexed input; shares same internal sample-and-hold path |
| 3 | AIN3 | Analog input channel 3 - third channel; all four channels share common reference and conversion core |
| 4 | AIN4 | Analog input channel 4 - fourth and final channel in MAX154 family; no A2 pin used |
| 5 | A0 | Channel address bit 0 - LSB of 2-bit address selecting one of four analog inputs |
| 6 | A1 | Channel address bit 1 - MSB of 2-bit address; A1 = A0 = 0 selects AIN1 |
| 7 | DB0–DB7 | Three-state parallel data outputs - latched 8-bit result; high-impedance when CS or RD high |
| 10 | RD | Read control input - falling edge initiates conversion and/or reads data depending on Mode 0/1 |
| 11 | INT | Interrupt output - open-drain, active-low signal indicating conversion completion |
| 12 | GND | Analog/digital ground - single ground pin; requires low-impedance PCB connection to minimize noise coupling |
| 13 | VREF− | Reference lower bound - sets zero-code voltage; must be tied to GND or external bias point |
| 14 | VREF+ | Reference upper bound - sets full-scale voltage; typically connected to VDD or external reference |
| 15 | RDY | Ready output - open-drain status signal for microprocessor WAIT input; low during conversion |
| 16 | CS | Chip select input - active-low enable; must be asserted before RD to initiate valid operation |
| 19 | VDD | +5 V power supply - powers analog core, digital logic, and internal reference buffer |
| 20 | REF OUT | 2.5 V reference output - buffered internal reference; requires 0.01 µF bypass capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates external sample-and-hold IC and associated layout complexity |
| On-chip 2.5 V reference | Reduces system-level component count and improves long-term stability vs. external references |
| No external clock required | Internal timing generator enables fully asynchronous operation using only CS/RD handshaking |
| Memory-mapped or I/O-port interface | Direct connection to microprocessor data bus without glue logic or address decoding |
| Single +5 V supply | Removes need for dual-rail supplies or charge pumps-critical for compact embedded designs |
Applications
| Telecommunications Signal Monitoring | Digital Servo Control Feedback |
|---|---|
Use Scenario: Real-time monitoring of line voltage, current, and modulation envelope in DSL or baseband RF front-ends. IC Role / Device Role / Timing Role: Four-channel ADC digitizing sensor outputs at ≤100 kHz per channel with deterministic 2.5 µs latency. Use Value: Enables closed-loop adaptation within 10 µs total loop time, meeting ITU-T G.992.1 timing constraints. |
Use Scenario: Sampling motor position, current, and temperature in industrial servo drives for field-oriented control. IC Role / Device Role / Timing Role: Simultaneous capture of analog feedback signals with synchronized conversion start via CS/RD edge. Use Value: Supports 20 kHz PWM carrier synchronization and sub-µs jitter tolerance in torque ripple suppression. |
| Audio Instrumentation Front-End | High-Speed Data Acquisition System |
Use Scenario: Digitizing multi-channel audio test signals (e.g., THD+N, frequency response) in benchtop analyzers. IC Role / Device Role / Timing Role: 8-bit quantization of conditioned microphone or line-level inputs with built-in reference stability. Use Value: Delivers consistent SNR >48 dB across temperature without recalibration, reducing test setup overhead. |
Use Scenario: Modular DAQ module for lab or factory-floor monitoring of vibration, pressure, and thermal sensors. IC Role / Device Role / Timing Role: Core ADC in compact 4-channel acquisition node interfacing directly to ARM Cortex-M4 GPIOs. Use Value: Enables plug-and-play integration with existing firmware stacks via simple memory-mapped I/O protocol. |
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 | 2.4 µs conversion, SPI interface, no internal reference, 2.7–5.25 V supply | Requires external reference and serial interface logic; better suited for low-pin-count MCU designs | Select when board space is constrained and SPI is preferred over parallel bus |
| MAX1113ECM+ | 2.5 µs conversion, same 24-pin SO package, ±1 LSB error, 0°C to +70°C | Higher error spec (±1 LSB vs. ±1/2 LSB); identical pinout but different reference architecture | Acceptable where cost sensitivity outweighs 0.5 LSB accuracy requirement |
Compared with MAX154BCWG+, ADS7822U trades parallel simplicity for serial flexibility and wider supply range, while MAX1113ECM+ offers drop-in mechanical compatibility but relaxed accuracy-making MAX154BCWG+ optimal for precision timing-critical acquisition where ±1/2 LSB and deterministic latency are mandatory.
Availability
MAX154BCWG+ is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial servo control, and audio instrumentation requiring stable component supply and guaranteed long-term sourcing.
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) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX154/MAX158 product line was engineered to deliver integrated, high-speed data acquisition solutions-combining multiplexer, track/hold, reference, and parallel interface in a single CMOS IC for real-time embedded signal processing.
FAQ
What is the maximum sampling rate achievable with the MAX154BCWG+?
The MAX154BCWG+ achieves up to 100 kHz per channel, calculated from its 2.5 µs conversion time plus minimum 500 ns inter-conversion delay. This allows full 4-channel acquisition at 25 kHz aggregate rate in round-robin mode, sufficient for 10 kHz bandwidth signals per Nyquist criterion. The MAX154BCWG+ does not require external clocking-the timing is internally generated upon CS/RD assertion.
Does the MAX154BCWG+ require an external reference voltage?
No, the MAX154BCWG+ includes a precision 2.5 V on-chip reference with ±3 mV load regulation and 60 ppm/°C temperature drift, eliminating the need for external reference components. REF OUT is buffered and rated for ±30 mA, supporting direct connection to VREF+ and VREF− pins. External bypassing with 0.01 µF ceramic capacitor to GND is mandatory for stability.
Can the MAX154BCWG+ operate with a 3.3 V microprocessor interface?
Yes-the MAX154BCWG+ logic inputs (CS, RD, A0, A1) accept TTL-compatible thresholds (VINL ≤ 0.8 V, VINH ≥ 2.4 V), making them compatible with 3.3 V systems when driven by 3.3 V logic. However, VDD must remain at +5 V, and DB0–DB7 outputs swing rail-to-rail (0 V to +5 V), so level-shifting is required if connecting to 3.3 V-only data buses.
How does the MAX154BCWG+ handle analog input source impedance?
The MAX154BCWG+ analog inputs present dynamic loading due to internal sampling capacitors (≈45 pF) and multiplexer on-resistance (~600 Ω). For accurate settling within the 1 µs tracking window, source impedance must be ≤100 Ω. Higher impedances cause gain/linearity errors; a unity-gain op-amp buffer with ≥1 MHz loop gain is recommended for high-Z sensors driving the MAX154BCWG+.
What is the difference between Mode 0 and Mode 1 operation in the MAX154BCWG+?
Mode 0 uses microprocessor WAIT-state extension: CS and RD held low until conversion completes, then data appears on DB0–DB7. Mode 1 performs pipelined operation: first RD/CS pulse starts conversion and reads prior result; second pulse reads new result. Mode 0 suits 8051/8086-style CPUs; Mode 1 fits faster processors like ARM Cortex-M without WAIT support. Both modes are supported natively by the MAX154BCWG+ without configuration bits.
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:
- Active
- 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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