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Analog Devices Inc./Maxim Integrated MAX154ACNG+
- Part No.:
- MAX154ACNG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX154ACNG+.pdf
- Description:
- IC ADC 8BIT FLASH 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,285
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Product details
Overview
MAX154ACNG+ 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 digital signal processing and high-speed servo control systems.
For engineers reviewing the MAX154ACNG+ datasheet, MAX154ACNG+ pinout, MAX154ACNG+ application, or MAX154ACNG+ equivalent, key selection criteria include its guaranteed ±1/2 LSB total unadjusted error, SSOP-24 package footprint, Mode 0/Mode 1 interface flexibility, and absence of external clock requirement.
Technical Context
The MAX154ACNG+ employs a half-flash architecture with two 4-bit flash ADC sections and an internal DAC to generate 8-bit results using 15 comparators. Its conversion sequence begins on falling edges of CS and RD, with MS bits latched after ~1µs tracking and LS bits completed within 2.5µs total.
Digital interface supports two modes: Mode 0 (WAIT-state compatible, INT indicates completion) and Mode 1 (non-WAIT, concurrent read/convert). Status outputs include open-drain RDY (for READY/WAIT input) and active-low INT, both synchronized to CS/RD edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for precise amplitude quantization |
| 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 temperature range (0°C to +70°C) |
| Analog Input Range | 0V to +5V - compatible with standard TTL/CMOS logic levels without signal conditioning |
| Reference Output | 2.50V ±3mV - stable internal reference eliminates need for external precision voltage source |
| Supply Voltage | +5V ±5% - single-supply operation simplifies power design and reduces BOM count |
| Operating Temperature | 0°C to +70°C - commercial-grade rating suitable for industrial embedded and telecom equipment |
Pinout & Package
MAX154ACNG+ is housed in a 24-pin shrink small-outline package (SSOP), measuring 7.07mm × 5.20mm × 1.73mm (max), with 0.65mm lead pitch and gull-wing terminations for surface-mount assembly.
| 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 acquisition without external analog switch |
| 3 | AIN3 | Analog input channel 3 - shares internal track/hold; no external hold capacitor required |
| 4 | AIN4 | Analog input channel 4 - completes 4-channel set; all inputs rated for 0V–+5V range |
| 5 | A0 | Multiplexer address bit 0 - selects one of four channels when combined with A1 |
| 6 | A1 | Multiplexer address bit 1 - enables full 4-channel addressing (00–11 binary) |
| 7 | N.C. | No connect - internally unused; must be left floating or tied to GND per layout guidelines |
| 8 | VDD | +5V power supply - requires 47µF electrolytic + 0.1µF ceramic bypassing at pin |
| 9 | DB0 | Data bus bit 0 (LSB) - three-state output; driven only when CS and RD are active low |
| 10 | DB1 | Data bus bit 1 - latched output valid after INT assertion in Mode 0 |
| 11 | DB2 | Data bus bit 2 - high-impedance state between conversions prevents bus contention |
| 12 | DB3 | Data bus bit 3 - compatible with 8-bit microprocessor data buses without glue logic |
| 13 | DB4 | Data bus bit 4 - timing-critical path; tACC1 = 1.6µs max access time after RD |
| 14 | DB5 | Data bus bit 5 - specified load: CL = 50pF, RL = 5kΩ for timing compliance |
| 15 | DB6 | Data bus bit 6 - VOH ≥ 4.0V @ IOUT = 1.6mA ensures TTL/CMOS compatibility |
| 16 | DB7 | Data bus bit 7 (MSB) - completes 8-bit parallel output word |
| 17 | CS | Chip-select input - active-low enable; initiates conversion when asserted with RD |
| 18 | RD | Read input - controls interface mode; Mode 0 requires sustained low, Mode 1 uses pulse |
| 19 | RDY | Ready output - open-drain, pulled low on CS fall, high-impedance at conversion end |
| 20 | INT | Interrupt output - active-low pulse signals conversion completion to host processor |
| 21 | VREF+ | Reference upper span - sets full-scale input voltage; range: VREF− to VDD |
| 22 | VREF− | Reference lower span - sets zero-code voltage; range: GND to VREF+ |
| 23 | GND | Analog/digital ground - common return for VDD, reference, and analog inputs |
| 24 | REF OUT | 2.5V reference output - buffered, load-regulated to ±10mV over 0–10mA sink |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates external sample-and-hold circuitry, reducing board area and signal-path errors |
| On-chip 2.5V reference | Stable ±3mV output with 60ppm/°C drift enables self-contained data acquisition |
| Single +5V supply | Removes need for dual-rail supplies or level-shifting, lowering system power complexity |
| No external clock required | Internal timing control allows asynchronous operation - no clock routing or jitter concerns |
| Memory-mapped or I/O-port interface | Direct connection to microprocessor buses without address decoding logic |
Applications
| Telecommunications Signal Monitoring | Digital Audio Instrumentation |
|---|---|
Use Scenario: Real-time monitoring of line voltage, echo cancellation feedback, or speech bandpass filter outputs in voice-over-DSL systems. IC Role / Device Role / Timing Role: 4-channel ADC digitizing conditioned analog signals at up to 100kHz per channel with deterministic 2.5µs latency. Use Value: Enables simultaneous capture of multiple signal paths without multiplexer-induced delay skew or external hold artifacts. |
Use Scenario: Capturing multi-channel audio waveforms from microphone preamps or synthesizer outputs in test equipment. IC Role / Device Role / Timing Role: High-fidelity 8-bit sampling with ±1/2 LSB accuracy preserves dynamic range for spectral analysis. Use Value: Internal 2.5V reference and track/hold ensure consistent gain and offset across channels, critical for phase-coherent measurements. |
| High-Speed Servo Control Feedback | Industrial Data Acquisition Modules |
Use Scenario: Closed-loop position/velocity sensing in CNC motion controllers using quadrature encoder analog interpolation. IC Role / Device Role / Timing Role: Four independent analog inputs acquire motor current, back-EMF, temperature, and position sensor outputs synchronously. Use Value: 2.5µs conversion time supports >10kHz control loop bandwidth while maintaining resolution for sub-millimeter positioning. |
Use Scenario: Modular DAQ units for factory-floor vibration analysis, where compact size and thermal stability are critical. IC Role / Device Role / Timing Role: Core ADC in standalone measurement node, interfacing to ARM-based host via parallel bus. Use Value: SSOP-24 package and 0°C to +70°C rating allow dense PCB layouts in convection-cooled enclosures without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit resolution, SPI interface, 2.5µs conversion, but requires external reference and clock | Higher precision needed; serial interface preferred for reduced pin count | Select when resolution >8-bit and board space favors serial over parallel |
| MAX1113ECM+ | 8-bit, 4-channel, 1.5µs conversion, same SSOP-24 package, but ±1 LSB error and no internal reference | Lower accuracy acceptable; external reference already present in design | Choose for faster conversion where ±1/2 LSB is not mandatory and reference is shared |
Compared with ADS7822U and MAX1113ECM+, the MAX154ACNG+ uniquely combines internal 2.5V reference, track/hold, and parallel microprocessor interface in a single SSOP-24 package - reducing component count and layout complexity for cost-sensitive, medium-speed DAQ systems.
Availability
MAX154ACNG+ is available at Aetrix Electronics and suitable for telecommunications signal monitoring, digital audio instrumentation, and high-speed servo control requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX154ACNG+ 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 industrial, communications, and computing applications.
The MAX154ACNG+ belongs to Maxim's high-speed data acquisition product line, engineered specifically for compact, low-glue, single-supply systems needing fast, accurate digitization without external timing or reference components.
FAQ
What is the maximum sampling rate achievable with the MAX154ACNG+?
The MAX154ACNG+ achieves up to 100kHz per channel in 4-channel mode. This is calculated from its 2.5µs conversion time plus minimum 500ns inter-conversion delay, yielding 3.0µs per sample cycle. The device supports continuous acquisition without dead time between channels when using Mode 0 interface and proper address sequencing. MAX154ACNG+ does not require external clock synchronization to maintain this rate.
Does the MAX154ACNG+ require an external reference voltage?
No, the MAX154ACNG+ includes a fully integrated, trimmed 2.5V reference with ±3mV initial accuracy and 60ppm/°C temperature drift. REF OUT (pin 24) provides this voltage and can drive loads up to 10mA. External reference is optional only if higher precision or different reference voltage is required - in which case VREF+ and VREF− pins must be driven accordingly. MAX154ACNG+ functions fully with internal reference enabled by default.
How does the MAX154ACNG+ handle analog input settling for high-impedance sources?
The MAX154ACNG+ analog inputs present a dynamic capacitive load (~45pF) during acquisition. For accurate results, source impedance must be ≤100Ω to ensure full settling within the internal 1µs tracking window. Higher impedances cause gain/offset errors due to incomplete charging of internal comparator capacitance. MAX154ACNG+ data sheet Figure 9b models this as an RC network; op-amp drivers should maintain >1MHz loop gain to meet this requirement.
Can the MAX154ACNG+ operate in bipolar input mode?
Yes, the MAX154ACNG+ supports bipolar operation via external signal conditioning. Figure 10a in the datasheet shows a front-end amplifier that scales ±4V inputs to 0V–+5V range at the AIN pins. The resulting output code follows complementary offset binary format. MAX154ACNG+ itself remains unipolar - the bipolar capability is achieved entirely through external circuitry, preserving its internal 0V–+5V input specification.
What are the key timing differences between Mode 0 and Mode 1 operation of the MAX154ACNG+?
In Mode 0, RD remains low throughout conversion; data becomes valid after INT asserts (~600ns post-start), and RDY drives WAIT input. In Mode 1, RD is pulsed low; the first READ returns prior conversion data while starting new conversion, requiring a second READ to retrieve the result. MAX154ACNG+ Mode 1 mandates ≥2.5µs delay between RD pulses and does not use RDY. Both modes share identical conversion time (2.5µs) and address setup/hold requirements.
MAX154ACNG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX154ACNG+ FAQ
1.How can I place an order for MAX154ACNG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX154ACNG+ 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 MAX154ACNG+ reliable?
The price and inventory of MAX154ACNG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX154ACNG+ is usually 5 days.
3.What payment methods are accepted for MAX154ACNG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX154ACNG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX154ACNG+?
MAX154ACNG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX154ACNG+ 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 MAX154ACNG+?
For technical support, including MAX154ACNG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX154ACNG+ requirements.
6.How does Aetrix verify that MAX154ACNG+ is sourced from the original manufacturer or authorized distributors?
All MAX154ACNG+ 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 MAX154ACNG+ meets industry standards.
7.What is the process for return or replacement of MAX154ACNG+?
All MAX154ACNG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX154ACNG+, 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 MAX154ACNG+ part is unused and in its original packaging.
Return procedure for MAX154ACNG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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