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Analog Devices Inc./Maxim Integrated MAX113CAG+
- Part No.:
- MAX113CAG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX113CAG+.pdf
- Description:
- IC ADC 8BIT FLASH 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,343
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Product details
Overview
MAX113CAG+ from Maxim Integrated is a +3V, 4-channel, 8-bit analog-to-digital converter (ADC) using half-flash architecture to achieve 1.8µs conversion time (400ksps), 1.5mA operating current, and 1µA power-down current. It integrates an internal track/hold, supports ratiometric operation via REF+/REF− inputs, and targets battery-powered data acquisition in portable instrumentation and system-health monitoring.
For engineers reviewing the MAX113CAG+ datasheet, MAX113CAG+ pinout, MAX113CAG+ application, or MAX113CAG+ equivalent, this device offers verified 4-channel sampling at 400ksps with sub-1LSB total unadjusted error, direct 8-bit parallel µP interface, and fast wake-up (<900ns) from ultra-low-power mode-key selection criteria for low-power embedded sensing systems.
Technical Context
The MAX113CAG+ implements a two-stage half-flash ADC architecture: a 4-bit flash section generates MSBs and drives an internal DAC to produce a residue voltage, which a second 4-bit flash section converts to LSBs-enabling full 8-bit resolution with only 15 comparators. Its analog multiplexer selects among four single-ended input channels (IN1–IN4) under A0/A1 address control.
Digital interface operates in Read Mode (MODE = 0) or Write-Read Mode (MODE = 1), supporting memory-mapped or I/O-port µP connection without external logic. WR/RDY serves dual function as write strobe or ready-status output; INT signals conversion completion; PWRDN enables microamp-level shutdown between bursts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete digital codes across full-scale input range |
| Conversion Time | 1.8µs per channel - enables 400ksps sustained sampling rate in WR-RD mode |
| Total Unadjusted Error | ≤ ±1LSB - ensures monotonicity and no missing codes over temperature and supply range |
| Supply Current | 1.5mA (active), 1µA (power-down) - reduces average power in burst-mode sensing by >1000× |
| Input Channels | 4 single-ended (IN1–IN4) - supports multi-sensor monitoring without external MUX |
| Reference Interface | Ratiometric REF+/REF− - eliminates supply-voltage drift impact on measurement accuracy |
| Track/Hold | Integrated - captures fast transients up to 0.5V/µs slew rate without external circuitry |
Pinout & Package
The MAX113CAG+ is housed in a 24-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, JEDEC MO-153 compliant, suitable for high-density PCB layouts and automated assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VDD (24) | Positive supply input | Accepts +3.0V to +3.6V; requires 4.7µF + 0.1µF bypassing to GND for stable conversion |
| PWRDN (23) | Power-down control | Logic low reduces VDD current to 1µA; wake-up delay <900ns includes power-up + acquisition |
| A0, A1 (22, 21) | Multiplexer address inputs | Select IN1–IN4 (00→IN1, 01→IN2, 10→IN3, 11→IN4); latched on CS/RD/WR edge |
| IN1–IN4 (5, 3, 4, 1) | Analog input terminals | Single-ended, 32pF input capacitance; support source impedances ≤1.5kΩ without extended tACQ |
| REF+, REF− (14, 13) | Reference span inputs | Define zero-code (REF−) and full-scale (REF+) voltages; enable ratiometric measurement against sensor excitation |
| CS (16), RD (10), WR/RDY (15) | Digital interface controls | Enable µP-compatible memory/I/O port access; RDY functions as open-collector ready signal in Read Mode |
| INT (11) | Conversion complete indicator | Active-low pulse signals end-of-conversion; resets on rising edge of CS or RD |
| D0–D7 (6–9, 17–20) | Three-state parallel data outputs | Latched 8-bit result; directly drive 8-bit µP data bus; high-impedance when CS high or during conversion |
| MODE (5) | Interface mode select | Low = Read Mode (RD-triggered), High = Write-Read Mode (WR-initiated, pipelined option available) |
| GND (12) | Analog/digital ground reference | Common return for VDD, REF−, and analog inputs; must be low-impedance star point |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Combines speed of flash with efficiency of successive approximation-achieves 8-bit resolution in 1.8µs with minimal comparator count (15) |
| Integrated track/hold | Eliminates need for external sample-hold IC; supports accurate digitization of signals with 0.28V/µs minimum slew rate |
| Ratiometric reference inputs | Enables direct connection to resistive sensors (e.g., RTDs, potentiometers) where REF+ ties to same excitation source as sensor |
| 1µA power-down mode | Reduces average system power in intermittent-sampling applications-e.g., 1-second interval yields ~1.5µA average current |
| Direct µP interface | No glue logic required: three-state outputs, address decoding, and mode-selectable timing comply with standard 8-bit bus protocols |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous monitoring of ECG, temperature, or blood oxygen via low-power wearable patch. IC Role / Device Role / Timing Role: 4-channel ADC digitizes analog front-end outputs at 100–400ksps; internal track/hold captures transient biopotentials. Use Value: 1.5mA active / 1µA standby current extends coin-cell life to >1 year in sleep-wake cycles; ratiometric mode rejects supply ripple affecting sensor excitation. | Use Scenario: Environmental parameter logging (temp/humidity/pressure) in remote field nodes powered by solar-charged Li-ion. IC Role / Device Role / Timing Role: ADC samples multiple sensors sequentially every 10 seconds; wakes from PWRDN on timer interrupt. Use Value: Sub-900ns wake-up latency allows precise timing control; ≤±1LSB TUE ensures calibration stability over industrial temperature range (0°C to +70°C). |
| Industrial System Health Monitoring | Communications Baseband Monitoring |
Use Scenario: Real-time voltage, current, and thermal monitoring of power supplies and FPGAs in telecom equipment. IC Role / Device Role / Timing Role: Digitizes DC rails and thermal diodes at 10ksps burst rate; uses pipelined WR=RD mode for maximum throughput. Use Value: 400ksps capability provides oversampling margin for noise reduction; internal REF+/REF− interface simplifies isolated sensing with optocoupled references. | Use Scenario: In-band signal quality assessment (RSSI, distortion) in 4G/LTE small-cell baseband processors. IC Role / Device Role / Timing Role: ADC captures IF or baseband analog monitor points; operates in Write-Read Mode with µP-controlled channel sequencing. Use Value: 45dB SINAD and 50dB SFDR meet LTE ACLR requirements for diagnostic sampling; 32pF input capacitance minimizes loading on sensitive RF detector outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel, 8-bit, low-power ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7–5.25V supply; SPI interface; 2.5µs conversion; no internal track/hold | Requires external S&H for fast signals; better suited for µC with limited GPIO but available SPI | Choose ADS7822U if board space is constrained and serial interface preferred over parallel bus |
| MAX1113CAG+ | Same package/pinout; 1MSPS SAR architecture; 2.7–3.6V; 1.8mA active current | Higher speed but higher power; no power-down mode below 10µA | Choose MAX1113CAG+ only if 1MSPS sampling is mandatory and 10× higher active current is acceptable |
Compared with ADS7822U and MAX1113CAG+, the MAX113CAG+ uniquely balances 400ksps speed, 1µA shutdown, integrated track/hold, and parallel µP interface-making it optimal for cost-sensitive, battery-operated systems requiring deterministic timing and minimal external components.
Availability
MAX113CAG+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial system health monitoring requiring stable component supply across extended production lifecycles.
Supply support for MAX113CAG+ 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, medical, and communications applications.
The MAX113/MAX117 family was engineered specifically for low-power, multi-channel data acquisition in space- and energy-constrained embedded systems-emphasizing fast wake-up, ratiometric accuracy, and µP compatibility without support logic.
FAQ
What is the maximum sampling rate achievable with the MAX113CAG+?
The MAX113CAG+ achieves a maximum sampling rate of 400ksps in Write-Read Mode with tRD < tINTL timing (WR-RD mode). This is calculated from tWR + tRD + tRI + tACQ = 600ns + 800ns + 300ns + 450ns = 2.15µs per conversion cycle. The device maintains ≤±1LSB total unadjusted error across its full 0°C to +70°C operating range while delivering this rate, making MAX113CAG+ suitable for real-time sensor monitoring where timing determinism is critical.
Does the MAX113CAG+ require an external clock source?
No, the MAX113CAG+ does not require an external clock source. All timing-including conversion, track/hold control, and digital interface synchronization-is generated internally using on-chip timing circuits. This eliminates clock routing complexity, jitter sensitivity, and external component count. The MAX113CAG+'s self-timed operation ensures consistent 1.8µs conversion time across supply voltages from +3.0V to +3.6V and temperatures from 0°C to +70°C, as verified in the device's Timing Characteristics table.
How does the ratiometric reference configuration work on the MAX113CAG+?
The MAX113CAG+ implements ratiometric operation by accepting independent REF+ and REF− inputs that define the full-scale and zero-scale voltages of the ADC transfer function. When both REF+ and the analog input signals are derived from the same excitation source (e.g., a resistor divider or sensor bridge), supply variations cancel out in the digitized result. For example, if a temperature sensor's output and REF+ are both supplied by the same 3.0V rail, the MAX113CAG+ output code depends only on the sensor's resistance ratio-not absolute rail voltage-ensuring measurement stability without precision voltage references.
What is the function of the MODE pin on the MAX113CAG+?
The MODE pin on the MAX113CAG+ selects between two digital interface protocols: MODE = 0 configures Read Mode (conversion initiated by RD low), where WR/RDY acts as an open-collector ready signal; MODE = 1 configures Write-Read Mode (conversion initiated by WR low), enabling pipelined operation when WR and RD are tied together. This dual-mode flexibility allows the MAX113CAG+ to interface seamlessly with diverse microprocessors-whether they support wait-state handshaking (Read Mode) or prefer strobe-based control (Write-Read Mode)-without redesigning the host firmware or hardware.
Can the MAX113CAG+ operate with a 5V supply?
No, the MAX113CAG+ is specified only for +3.0V to +3.6V single-supply operation and must not be operated at 5V. Absolute maximum ratings limit VDD to +7V, but functional operation above +3.6V violates the electrical specifications-including 1.5mA supply current, 1.8µs conversion time, and ≤±1LSB total unadjusted error-which are guaranteed only within the +3.0V to +3.6V range. For +5V systems, Maxim specifies the pin-compatible MAX114CNG+/MAX114CAG+ family, which shares identical functionality and pinout but is characterized for 4.75V to 5.25V operation.
MAX113CAG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm 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:
- External
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX113CAG+ FAQ
1.How can I place an order for MAX113CAG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX113CAG+ 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 MAX113CAG+ reliable?
The price and inventory of MAX113CAG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX113CAG+ is usually 5 days.
3.What payment methods are accepted for MAX113CAG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX113CAG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX113CAG+?
MAX113CAG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX113CAG+ 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 MAX113CAG+?
For technical support, including MAX113CAG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX113CAG+ requirements.
6.How does Aetrix verify that MAX113CAG+ is sourced from the original manufacturer or authorized distributors?
All MAX113CAG+ 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 MAX113CAG+ meets industry standards.
7.What is the process for return or replacement of MAX113CAG+?
All MAX113CAG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX113CAG+, 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 MAX113CAG+ part is unused and in its original packaging.
Return procedure for MAX113CAG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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