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Analog Devices Inc./Maxim Integrated MAX1084ACSA
- Part No.:
- MAX1084ACSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1084ACSA.pdf
- Description:
- IC ADC 10BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,669
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Product details
Overview
The MAX1084ACSA from Maxim Integrated is a 10-bit, 400ksps serial analog-to-digital converter (ADC) with internal +2.5V reference, single +4.5V to +5.5V supply operation, ±0.5 LSB INL, and SPI/QSPI/MICROWIRE 3-wire interface - designed for portable data logging and battery-powered instrumentation where space, power, and precision are constrained.
For engineers reviewing the MAX1084ACSA datasheet, MAX1084ACSA pinout, MAX1084ACSA application, or MAX1084ACSA equivalent, this page delivers verified electrical parameters, package mapping, functional pin roles, real-world use cases, and validated alternative options - all grounded in Maxim's official MAX1084/MAX1085 datasheet (Rev 1, 12/10).
Technical Context
The MAX1084ACSA implements a successive-approximation register (SAR) architecture with integrated track/hold and internal 2.5V voltage reference. It performs conversions using an external serial clock (up to 6.4MHz) and outputs unipolar 10-bit data plus three leading zeros in MSB-first format over DOUT.
Its analog input accepts 0–2.5V full-scale range referenced to the internal REF output; acquisition time is 468ns minimum, aperture jitter <50ps, and it supports shutdown mode with 2µA typical supply current. The device operates across 0°C to +70°C and is specified for DC accuracy (±0.5 LSB INL, ±1.0 LSB DNL) and dynamic performance (60dB SINAD, 70dB SFDR at 100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete digital codes for precise analog signal digitization. |
| Sampling Rate | 400ksps - supports high-speed transient capture in portable data acquisition systems. |
| INL | ±0.5 LSB - ensures linearity error remains under half an LSB across full temperature range (0°C to +70°C). |
| Reference | Internal +2.5V (±2mV tolerance, ±15ppm/°C tempco) - eliminates need for external reference and simplifies BOM. |
| Supply Range | +4.5V to +5.5V - compatible with standard 5V logic rails and industrial power domains. |
| Power Consumption | 2.5mA at 400ksps - enables extended battery life in handheld medical or sensor instruments. |
| Interface | SPI/QSPI/MICROWIRE 3-wire serial - interoperable with common microcontroller peripherals without level-shifting or glue logic. |
Pinout & Package
MAX1084ACSA is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead(Pb)-free. Pin functions are electrically validated per Maxim's functional diagram and pin description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +4.5V to +5.5V; powers analog and digital sections; requires 0.1µF + 10µF bypassing at package. |
| AIN (Pin 2) | Analog input | 0–2.5V unipolar range referenced to internal REF; protected by clamping diodes to VDD/GND. |
| SHDN (Pin 3) | Active-low shutdown control | Pulling low reduces IDD to 2µA typ; wake-up delay up to 1.4ms due to 4.7µF REF capacitor recharge. |
| REF (Pin 4) | Internal reference output | 2.5V ±2mV output; sources ≤800µA; must be bypassed with 4.7µF capacitor for stability and accuracy. |
| GND (Pin 5) | Analog/digital ground | Single-point star ground connection required; separates analog return path from noisy digital traces. |
| DOUT (Pin 6) | Serial data output | Three-state, MSB-first output; transitions 20ns after SCLK rising edge; high-impedance when CS = high. |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion and hold mode; controls DOUT enable/disable timing per tDOE/tDOD specs. |
| SCLK (Pin 8) | Serial clock input | Drives conversion and data shift-out; supports up to 6.4MHz; 50% duty cycle required. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Eliminates dual-rail design complexity and reduces system-level power regulation overhead. |
| Integrated track/hold | Removes need for external sample-and-hold circuitry, saving board area and signal-path error sources. |
| Internal 2.5V reference | Provides stable, factory-trimmed reference without calibration or external component cost. |
| Low-power shutdown mode | Reduces average current to µA-range between samples - critical for intermittent-sampling applications. |
| 8-pin SO package | Enables compact PCB layout in space-constrained portable devices while supporting automated assembly. |
Applications
| Portable Data Logging | Data Acquisition |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 100Hz–1kHz rates. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs with minimal power and footprint. Use Value: 400ksps sampling headroom allows oversampling for noise reduction; internal reference ensures consistent scaling across units. | Use Scenario: Modular industrial DAQ module acquiring multiple analog channels via multiplexer switching. IC Role / Device Role / Timing Role: Channel-specific ADC providing synchronized, low-latency conversion triggered by host controller. Use Value: SPI-compatible interface enables direct connection to FPGA or ARM-based controllers without protocol translation. |
| Medical Instruments | Battery-Powered Instruments |
Use Scenario: Handheld ECG front-end capturing biopotential signals with >60dB SNR requirement. IC Role / Device Role / Timing Role: Signal-chain ADC delivering clinical-grade linearity (±0.5 LSB INL) and low THD (–70dB). Use Value: Aperture jitter <50ps and 6MHz small-signal bandwidth preserve waveform fidelity during fast edge capture. | Use Scenario: Field-deployable multimeter with auto-ranging analog inputs and LCD display. IC Role / Device Role / Timing Role: Main ADC handling variable-range inputs through programmable gain amplifier stages. Use Value: Single 5V supply simplifies power architecture; shutdown mode extends alkaline battery life to >100 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1242ACSA+ | Slower 110ksps max rate; same 8-pin SO package and pinout; no internal reference (requires external REF). | Lower throughput; suitable only where sampling speed <110ksps and external reference is acceptable. | Select MAX1242ACSA+ only if cost sensitivity outweighs speed and integration requirements. |
| ADS7822U | TI 12-bit, 200ksps SAR ADC; 8-pin SOIC; external reference required; 2.7–5.25V supply; no shutdown pin. | Higher resolution but lower speed and no native shutdown - increases system power management complexity. | Choose ADS7822U when 12-bit resolution is mandatory and 200ksps suffices; verify REF sourcing and sleep control externally. |
Compared with MAX1242ACSA+ and ADS7822U, the MAX1084ACSA provides higher sampling speed (400ksps), integrated reference, and active shutdown - making it optimal for portable, battery-sensitive, and space-constrained designs requiring ≥10-bit precision without external support components.
Availability
MAX1084ACSA is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1084ACSA 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, mixed-signal, and power-management ICs for industrial, medical, and communications markets.
The MAX1084/MAX1085 product line was engineered for low-power, space-constrained data acquisition - delivering integrated reference, serial interface, and precision SAR conversion in minimal 8-pin SO packages.
FAQ
What is the operating temperature range for the MAX1084ACSA?
The MAX1084ACSA is rated for operation from 0°C to +70°C. This commercial-grade temperature range is explicitly defined in the ordering information table of the MAX1084/MAX1085 datasheet (Rev 1, 12/10) and applies to the 'A' grade variant denoted by the 'A' in MAX1084ACSA. It is not qualified for extended industrial (–40°C to +85°C) operation - that specification applies to the MAX1084ESA variant.
Does the MAX1084ACSA require an external reference voltage?
No, the MAX1084ACSA does not require an external reference voltage. It integrates a factory-trimmed +2.5V reference (VREF = 2.48V to 2.52V) accessible at the REF pin. Per the datasheet, this internal reference must be bypassed with a 4.7µF capacitor for stable operation and specified accuracy - no external reference IC or resistor divider is needed for standard use.
What is the maximum serial clock frequency supported by the MAX1084ACSA?
The MAX1084ACSA supports a maximum serial clock (SCLK) frequency of 6.4MHz, as confirmed in the "ELECTRICAL CHARACTERISTICS-MAX1084" table under fSCLK parameter. This timing is validated across the full 0°C to +70°C operating range and enables the full 400ksps sampling rate with 16 clock cycles per conversion cycle.
How does the shutdown feature of the MAX1084ACSA reduce power consumption?
Pulling the SHDN pin low places the MAX1084ACSA into shutdown mode, reducing supply current to 2µA typical (10µA max). This state disables the internal reference and analog circuitry. Wake-up delay depends on REF capacitor recharge time - up to 1.4ms with the recommended 4.7µF bypass - and conversion may not begin until after this period elapses post-SHDN deassertion.
Is the MAX1084ACSA pin-compatible with the MAX1242 series?
Yes, the MAX1084ACSA is explicitly documented as pin-compatible with the MAX1242/MAX1243 family. The datasheet states: "These devices are pin-compatible, higher-speed versions of the MAX1242/MAX1243." Both share identical 8-pin SO packaging and matching pin assignments (VDD, AIN, SHDN, REF, GND, DOUT, CS, SCLK), enabling drop-in replacement where speed and integrated reference are beneficial.
MAX1084ACSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1084ACSA FAQ
1.How can I place an order for MAX1084ACSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1084ACSA 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 MAX1084ACSA reliable?
The price and inventory of MAX1084ACSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1084ACSA is usually 5 days.
3.What payment methods are accepted for MAX1084ACSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1084ACSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1084ACSA?
MAX1084ACSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1084ACSA 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 MAX1084ACSA?
For technical support, including MAX1084ACSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1084ACSA requirements.
6.How does Aetrix verify that MAX1084ACSA is sourced from the original manufacturer or authorized distributors?
All MAX1084ACSA 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 MAX1084ACSA meets industry standards.
7.What is the process for return or replacement of MAX1084ACSA?
All MAX1084ACSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX1084ACSA, 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 MAX1084ACSA part is unused and in its original packaging.
Return procedure for MAX1084ACSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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