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Analog Devices Inc./Maxim Integrated MAX1084BCSA+
- Part No.:
- MAX1084BCSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1084BCSA+.pdf
- Description:
- IC ADC 10BIT 400KSPS 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
MAX1084BCSA+ from Maxim Integrated is a 10-bit, single-supply serial analog-to-digital converter (ADC) with internal +2.5V reference, 400ksps sampling rate, ±1 LSB INL, and 8-pin SO package. It operates from +4.5V to +5.5V, integrates track/hold and SPI/QSPI/MICROWIRE-compatible 3-wire interface, and targets space-constrained, low-power data acquisition systems.
For engineers reviewing the MAX1084BCSA+ datasheet, MAX1084BCSA+ pinout, MAX1084BCSA+ application, or MAX1084BCSA+ equivalent, this page delivers verified electrical specs, thermal grade (0°C to +70°C), real-world timing constraints (e.g., tACQ = 468ns, tCONV = 2.5µs), and functional distinctions versus MAX1084A/MAX1084E variants.
Technical Context
The MAX1084BCSA+ uses a successive-approximation register (SAR) architecture with integrated track/hold and internal 2.5V reference, enabling unipolar 0–2.5V input conversion without external components. Its serial interface requires only SCLK, CS, and DOUT - no level-shifting or glue logic needed for direct connection to microcontrollers.
It supports two operational modes: normal (2.5mA supply current at 400ksps) and shutdown (2µA typical), with wake-up delay dependent on REF bypass capacitor discharge. Conversion is initiated by CS falling edge, and data is clocked out MSB-first with three leading zeros, requiring ≥15 SCLK rising edges for full 12-bit frame (10 data + 2 sub-bits).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 400ksps - enables real-time capture of signals up to 200kHz Nyquist bandwidth; conversion time fixed at 2.5µs per sample. |
| INL | ±1 LSB - ensures end-point linearity error ≤ ±2.44mV across full 0–2.5V input range, critical for precision sensor digitization. |
| Supply Range | +4.5V to +5.5V - compatible with standard 5V logic rails and industrial power domains; PSR = ±0.5mV/mA improves noise immunity. |
| Reference | Internal +2.5V (±2mV initial accuracy, ±15ppm/°C tempco) - eliminates external reference IC, reduces BOM count, and sources up to 800µA. |
| Interface | SPI/QSPI/MICROWIRE 3-wire serial - operates up to 6.4MHz SCLK; requires no external logic; DOUT is 3-state with 15pF capacitance. |
| Operating Temp | 0°C to +70°C - validated for commercial-grade embedded instrumentation, portable data loggers, and battery-powered test equipment. |
Pinout & Package
MAX1084BCSA+ is housed in an 8-pin Small Outline (SO) package, RoHS-compliant and lead(Pb)-free. Pinout matches MAX1084/MAX1085 family and is fully compatible with industry-standard SO-8 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply input | Accepts +4.5V to +5.5V; must be bypassed with 0.1µF + 10µF capacitors to analog ground for stable conversion performance. |
| AIN (Pin 2) | Analog input | Unipolar 0–2.5V input range referenced to internal VREF; protected by clamping diodes to GND/VDD; max source impedance 4kΩ for full AC spec compliance. |
| SHDN (Pin 3) | Active-low shutdown control | Pulling low reduces IDD to 2µA; wake-up delay depends on REF capacitor discharge; deassertion must precede CS fall by ≥tWAKE (up to 1.4ms). |
| REF (Pin 4) | Internal reference output | 2.5V ±2mV output; requires 4.7µF tantalum or low-ESR ceramic bypass; usable as system reference for other circuitry (max 800µA load). |
| GND (Pin 5) | Analog/digital ground | Single ground pin; PCB layout requires star grounding at this point, separate from digital return paths to minimize noise coupling into ADC core. |
| DOUT (Pin 6) | Serial data output | 3-state CMOS output; transitions 20ns after SCLK rising edge; outputs 12-bit frame (3 leading zeros + 10 data bits + 2 sub-bits) MSB-first. |
| CS (Pin 7) | Active-low chip select | Falling edge initiates conversion and hold mode; high state places DOUT in high-impedance; minimum pulse width 100ns required. |
| SCLK (Pin 8) | Serial clock input | Drives conversion timing and data shift-out; accepts up to 6.4MHz; 50% duty cycle required; timing-critical for tCSS (35ns setup) and tCSH (0ns hold). |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | Eliminates dual-rail design complexity; +4.5V to +5.5V operation simplifies power architecture for 5V-based portable instruments. |
| Integrated track/hold | Removes need for external T/H amplifier; 468ns acquisition time enables high-fidelity sampling of fast transients without external settling delay. |
| Internal 2.5V reference | Reduces component count and board area; ±15ppm/°C tempco ensures <±0.15mV drift over 0°C to +70°C operating range. |
| Low power at speed | 2.5mA @ 400ksps (vs. >5mA for comparable 10-bit ADCs) extends battery life in handheld data loggers and pen digitizers. |
| Pin-compatible upgrade | Direct drop-in replacement for MAX1242/MAX1243 with 2× higher throughput and improved INL/DNL, enabling performance upgrades without PCB revision. |
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; provides precise 10-bit resolution with internal reference stability across temperature swings. Use Value: Enables 6+ month battery life via 2.5mA active current and µA-level shutdown, while maintaining ±1 LSB linearity for calibrated measurement traceability. |
Use Scenario: Modular industrial DAQ module acquiring 8-channel analog inputs from strain gauges and thermocouples. IC Role / Device Role / Timing Role: Channel-scan ADC interfaced to microcontroller via SPI; handles multiplexed inputs with consistent 2.5µs conversion latency per sample. Use Value: Internal track/hold and 400ksps rate support anti-aliasing filter design with relaxed cutoff requirements, reducing analog front-end component count. |
| Medical Instruments | Battery-Powered Instruments |
Use Scenario: Portable ECG front-end capturing lead-II differential voltage with baseline stability and low noise. IC Role / Device Role / Timing Role: Signal-chain ADC converting amplified biopotential signals; leverages internal 2.5V reference to avoid drift-induced baseline wander. Use Value: ±1 LSB INL and 60dB SINAD ensure diagnostic-grade waveform fidelity; 8-pin SO footprint minimizes PCB area in compact handheld enclosures. |
Use Scenario: Handheld multimeter performing DC voltage, resistance, and continuity measurements with auto-ranging. IC Role / Device Role / Timing Role: Core ADC for main measurement path; uses internal reference and low supply current to maintain accuracy during extended field use. Use Value: Single 5V supply simplifies power design; shutdown mode (<2µA) preserves battery charge between measurements without sacrificing startup repeatability. |
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 |
|---|---|---|---|
| MAX1084ACSA+ | ±0.5 LSB INL (tighter), same 400ksps, identical pinout and interface; rated for 0°C to +70°C. | Higher precision required in calibration-critical lab equipment where ±0.5 LSB linearity is mandated. | Select MAX1084ACSA+ when absolute end-point linearity <±1.22mV is required; otherwise MAX1084BCSA+ offers optimal cost/performance balance. |
| ADS7822U | 12-bit resolution, 200ksps, +2.7V to +5.25V supply, SPI-only interface; no internal reference (requires external 2.5V). | Applications needing higher resolution but tolerating lower speed and added BOM complexity for reference and level-shifting. | Choose ADS7822U only if 12-bit depth justifies added design overhead; MAX1084BCSA+ delivers superior integration and lower system-level power. |
Compared with MAX1084ACSA+, MAX1084BCSA+ trades 0.5 LSB INL tolerance for broader production yield and lower unit cost, while retaining identical timing, power, and interface behavior. Against ADS7822U, it offers faster throughput, internal reference, and simpler layout - at the expense of 2-bit resolution.
Availability
MAX1084BCSA+ is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX1084BCSA+ 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, medical, and communications applications.
The MAX1084/MAX1085 product line delivers highly integrated, low-power serial ADCs optimized for space- and power-constrained systems where internal reference, small SO package, and SPI compatibility reduce total solution size and cost.
FAQ
What is the maximum serial clock frequency supported by MAX1084BCSA+?
The MAX1084BCSA+ supports a maximum SCLK frequency of 6.4MHz under specified conditions (50% duty cycle, VDD = +4.5V to +5.5V). This enables full 12-bit frame readout within 2.34µs, aligning with its 400ksps sampling capability. Exceeding 6.4MHz violates tCL/tCH timing margins and may cause data corruption or missed conversions.
Does MAX1084BCSA+ require an external reference voltage?
No, MAX1084BCSA+ 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. This internal reference drives the ADC core and can also serve as a system-level reference for other components, eliminating the need for external reference ICs or resistive dividers.
How does the shutdown mode affect reference stability in MAX1084BCSA+?
In shutdown mode (SHDN = low), the internal reference is disabled and the REF pin goes high-impedance. Upon exit from shutdown, the 4.7µF bypass capacitor at REF must recharge - causing a wake-up delay up to 1.4ms before valid conversions can resume. During this time, the reference voltage ramps from 0V to 2.5V; no conversions should be attempted until stabilization.
What is the analog input voltage range for MAX1084BCSA+?
The analog input (AIN) voltage range for MAX1084BCSA+ is 0V to +2.5V, referenced directly to its internal 2.5V reference. Input protection diodes allow transient excursions to (GND − 0.3V) and (VDD + 0.3V) without damage, but sustained operation outside 0–2.5V will produce invalid or saturated codes and may degrade long-term linearity.
Is MAX1084BCSA+ pin-compatible with MAX1242/MAX1243?
Yes, MAX1084BCSA+ is pin-compatible with MAX1242 and MAX1243. It serves as a higher-speed, enhanced-accuracy upgrade: supporting 400ksps (vs. 200ksps) and offering ±1 LSB INL (vs. ±2 LSB for MAX1242). No PCB changes are required - users retain identical layout, decoupling, and interface wiring while gaining throughput and linearity improvements.
MAX1084BCSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- -
MAX1084BCSA+ FAQ
1.How can I place an order for MAX1084BCSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1084BCSA+ 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 MAX1084BCSA+ reliable?
The price and inventory of MAX1084BCSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1084BCSA+ is usually 5 days.
3.What payment methods are accepted for MAX1084BCSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1084BCSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1084BCSA+?
MAX1084BCSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1084BCSA+ 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 MAX1084BCSA+?
For technical support, including MAX1084BCSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1084BCSA+ requirements.
6.How does Aetrix verify that MAX1084BCSA+ is sourced from the original manufacturer or authorized distributors?
All MAX1084BCSA+ 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 MAX1084BCSA+ meets industry standards.
7.What is the process for return or replacement of MAX1084BCSA+?
All MAX1084BCSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1084BCSA+, 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 MAX1084BCSA+ part is unused and in its original packaging.
Return procedure for MAX1084BCSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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