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Analog Devices Inc./Maxim Integrated MAX153CAP+
- Part No.:
- MAX153CAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX153CAP+.pdf
- Description:
- IC ADC 8BIT FLASH 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,544
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Product details
Overview
MAX153CAP+ from Maxim Integrated is a high-speed, µP-compatible 8-bit analog-to-digital converter (ADC) using half-flash architecture to deliver 660ns conversion time and 1Msps throughput. It operates from single +5V or dual ±5V supplies, supports unipolar/bipolar inputs, and features a dedicated POWERDN pin enabling 1µA typical power-down current-ideal for burst-mode data acquisition in battery-powered cellular telephones and portable radios.
For engineers reviewing the MAX153CAP+ datasheet, MAX153CAP+ pinout, MAX153CAP+ application, or MAX153CAP+ equivalent, key selection considerations include its 1MHz full-power bandwidth, ratiometric reference capability, internal track/hold, no-external-clock operation, and compatibility with µP data buses via latched three-state outputs.
Technical Context
The MAX153CAP+ implements a two-stage half-flash conversion architecture: a 4-bit flash ADC generates the upper 4 bits, then an internal 4-bit DAC produces a residue voltage that feeds a second 4-bit flash stage for the lower 4 bits-enabling 8-bit resolution at 1Msps without external timing components. Its digital interface supports RD mode (MODE = GND) and WR-RD mode (MODE = VDD), with INT and WR/RDY pins providing flexible µP handshake control.
Power-down is activated by pulling PWRDN low while holding CS high, reducing VDD current to 1µA (typ) with sub-200ns wake-up latency. Ratiometric operation is enabled by independent VREF+ and VREF− inputs referenced to supply rails, supporting both unipolar (0V–5V) and bipolar (±2.5V) input spans with guaranteed no missing codes and ±1 LSB total unadjusted error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers discrete quantization levels suitable for medium-speed signal digitization in embedded control and telecom front-ends. |
| Conversion Time | 660ns (WR-RD mode) - enables real-time sampling of fast transients without external clock synchronization. |
| Throughput Rate | 1Msps - supports continuous high-rate acquisition for digital-signal processing and servo-loop feedback. |
| Power-Down Current | 1µA (typ, +5V supply) - extends battery life in portable systems during idle intervals between burst-mode samples. |
| Full-Power Bandwidth | 1MHz - preserves amplitude fidelity for input signals up to 1MHz before significant attenuation occurs. |
| Input Voltage Range | Unipolar: 0V to VREF+; Bipolar: VREF− to VREF+ - configurable for ground-referenced or floating sensor interfaces. |
| Supply Voltage | +5V single or ±5V dual - simplifies power design in mixed-signal systems with existing 5V rails. |
| Total Unadjusted Error | ±1 LSB - ensures monotonicity and predictable code transitions across full operating temperature range (0°C to +70°C). |
Pinout & Package
MAX153CAP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant and lead-free (+ suffix). The package measures 7.2mm × 5.3mm × 1.95mm and is optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Analog Input | Accepts differential or single-ended signals between VREF− and VREF+; 22pF input capacitance requires ≤2.2kΩ source impedance for full accuracy. |
| D0–D7 (Pins 2–5, 14–17) | Three-State Data Outputs | Latched, bus-compatible outputs directly drive µP data buses; high-impedance state isolates bus when CS is high. |
| WR/RDY (Pin 6) | Mode-Dependent Control/Status | In RD mode: open-collector READY output; in WR-RD mode: WRITE strobe input-eliminates need for separate control lines. |
| MODE (Pin 7) | Interface Mode Select | Pulled low internally (50µA); logic-low selects RD mode (single read instruction), logic-high enables WR-RD pipelining. |
| RD (Pin 8) | Read Strobe Input | Triggers data access in RD mode; must be low during data hold window (≥60ns) to ensure valid latch capture. |
| INT (Pin 9) | Interrupt Output | Active-low, open-drain signal indicates conversion completion; resets on rising edge of CS or RD. |
| GND (Pin 10) | Analog Ground | Reference node for analog circuitry; must be separated from digital ground in mixed-signal layouts to minimize noise coupling. |
| VREF− (Pin 11) | Reference Lower Span | Sets zero-code voltage; accepts voltages from VSS to VREF+, enabling bipolar offset calibration. |
| VREF+ (Pin 12) | Reference Upper Span | Sets full-scale voltage; internal 1–4kΩ resistance allows direct connection to stable voltage sources. |
| CS (Pin 13) | Chip Select | Enables device decoding; must be high during power-down to prevent spurious conversions. |
| PWRDN (Pin 18) | Power-Down Control | CMOS/TTL-compatible input; low state reduces supply current to microamps while preserving state for <200ns wake-up. |
| VSS (Pin 19) | Negative Supply | 0V for unipolar operation; −5V for bipolar mode-requires separate low-noise regulation in dual-supply systems. |
| VDD (Pin 20) | Positive Supply | +5V ±5%; bypassed with 4.7µF electrolytic + 0.1µF ceramic to suppress switching noise affecting conversion accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Half-flash conversion architecture | Combines speed of flash ADC with reduced comparator count (15 vs. 255), achieving 660ns conversion without external clock or timing circuitry. |
| Ratiometric reference support | VREF+ and VREF− inputs referenced to supply rails enable accurate digitization of sensors whose output scales with supply voltage-critical for battery-operated systems. |
| µP-compatible parallel interface | No glue logic required: latched three-state outputs, memory-mapped or I/O-port behavior, and RD/WR/INT handshaking simplify integration with 8051, Z80, and ARM-based controllers. |
| Internal track/hold | Eliminates need for external sample-and-hold; acquisition time fixed at 160ns minimum, enabling deterministic timing in closed-loop control applications. |
| Burst-mode power optimization | 1µA power-down current and <200ns wake-up allow dynamic duty cycling-reducing average power by >99% in intermittent-sampling applications like wireless sensor nodes. |
| DC and dynamic performance guarantee | 100% production tested for ±1 LSB total unadjusted error, 45dB SINAD at 195.8kHz input, and no missing codes-ensuring reliability in production test and field use. |
Applications
| Cellular Telephone Baseband | Portable Radio IF Sampling |
|---|---|
|
Use Scenario: Digitizing intermediate-frequency (IF) signals in GSM/CDMA handset receivers for digital demodulation. IC Role / Device Role / Timing Role: High-speed ADC capturing 1MHz bandwidth IF samples with minimal latency to feed DSP algorithms. Use Value: 1Msps throughput and 1MHz full-power bandwidth preserve signal integrity across cellular bands; 1µA power-down extends talk time during channel idle periods. |
Use Scenario: Converting analog audio and control signals in handheld two-way radios with limited battery capacity. IC Role / Device Role / Timing Role: µP-controlled ADC acquiring voice, squelch, and RSSI data in burst intervals synchronized to PTT events. Use Value: RD mode simplifies firmware integration with legacy microcontrollers; 660ns conversion enables real-time audio buffering without DMA overhead. |
| Battery-Powered Data Loggers | High-Speed Servo Feedback Loops |
|
Use Scenario: Capturing sensor data (temperature, pressure, acceleration) in remote environmental monitors powered by coin cells. IC Role / Device Role / Timing Role: Low-quiescent ADC performing periodic 10ksps bursts, then entering 1µA sleep between samples. Use Value: Power-down current reduction from 15mA (active) to 1µA cuts average power by 99.99%, enabling multi-year operation on a single battery. |
Use Scenario: Sampling motor current and position feedback in industrial servo drives requiring sub-microsecond loop closure. IC Role / Device Role / Timing Role: Real-time ADC feeding FPGA-based PID controllers with deterministic 660ns latency per sample. Use Value: No external clock requirement eliminates jitter sources; internal track/hold ensures consistent aperture timing across temperature for stable loop gain. |
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 | SPI interface, 2.7V–5.25V supply, 1Msps, but no power-down mode below 10µA; 8-pin MSOP package. | Requires serial interface firmware overhead; unsuitable for µP bus-connected systems needing parallel access. | Select when board space is critical and SPI is already used elsewhere in system; avoid when µP data bus integration or ultra-low power-down is required. |
| MAX1113ECM+ | Same manufacturer, 8-bit, 1.5Msps, but only 2.7V–3.6V supply, no bipolar input support, and 24-pin TQFN package. | Optimized for low-voltage portable systems; lacks ±5V compatibility and ratiometric reference flexibility. | Prefer for modern 3.3V-only designs with higher throughput needs; not drop-in for legacy 5V or bipolar signal chains using MAX153CAP+. |
Compared with ADS7822U and MAX1113ECM+, the MAX153CAP+ uniquely combines parallel µP interface, ±5V/5V dual-supply flexibility, true 1µA power-down, and ratiometric bipolar operation-making it irreplaceable in legacy industrial and telecom equipment where bus compatibility and supply robustness are non-negotiable.
Availability
MAX153CAP+ is available at Aetrix Electronics and suitable for cellular telephones, portable radios, and battery-powered systems requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX153CAP+ 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 U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX153CAP+ belongs to Maxim's precision data-acquisition product line, designed specifically for µP-centric, low-power, high-throughput analog front-ends in portable and burst-mode instrumentation systems.
FAQ
What is the maximum sampling rate achievable with MAX153CAP+ in WR-RD mode?
The MAX153CAP+ achieves a maximum sampling rate of 1.23MHz in WR-RD mode (tRD < tINTL), calculated from tWR + tRD + tRI + tP = 250ns + 250ns + 150ns + 165ns. This exceeds the rated 1Msps throughput and is validated under specified load conditions (CL = 20pF) and temperature (TA = +25°C). At full temperature range (0°C to +70°C), the guaranteed minimum rate remains 1Msps.
Does MAX153CAP+ require an external clock to operate?
No, MAX153CAP+ does not require an external clock. Its half-flash architecture and integrated timing and control circuitry enable autonomous conversion initiation via WR or RD strobes. The device derives all internal timing from the digital control signals, eliminating clock distribution complexity and jitter sensitivity-confirmed in the Functional Diagram and Timing Characteristics tables.
Can MAX153CAP+ interface directly with an 8051 microcontroller data bus?
Yes, MAX153CAP+ is fully compatible with the 8051 data bus. Its latched, three-state D0–D7 outputs, active-low INT and RDY signals, and standard CS/WR/RD timing align with 8051 I/O port protocols. No external address decoding or bus transceivers are needed-the MAX153CAP+ appears as a memory-mapped peripheral or I/O port, as stated in the General Description.
What is the purpose of the MODE pin on MAX153CAP+?
The MODE pin on MAX153CAP+ selects between two digital interface modes: logic-low configures RD mode (conversion triggered by RD strobe, WR/RDY functions as READY), and logic-high enables WR-RD mode (conversion initiated by WR, WR/RDY serves as WRITE input). An internal 50µA pulldown ensures default RD mode if left unconnected, simplifying basic implementations.
How does MAX153CAP+ achieve 1µA power-down current?
MAX153CAP+ achieves 1µA typical power-down current by disabling internal bias networks and analog circuitry when PWRDN is pulled low and CS is held high. This state is verified in the Electrical Characteristics table (Power-Down VDD Current = 1µA typ at +5V). Critical design notes specify that CS must remain high during shutdown to prevent incomplete conversions and elevated current draw.
MAX153CAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX153CAP+ FAQ
1.How can I place an order for MAX153CAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX153CAP+ 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 MAX153CAP+ reliable?
The price and inventory of MAX153CAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX153CAP+ is usually 5 days.
3.What payment methods are accepted for MAX153CAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX153CAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX153CAP+?
MAX153CAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX153CAP+ 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 MAX153CAP+?
For technical support, including MAX153CAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX153CAP+ requirements.
6.How does Aetrix verify that MAX153CAP+ is sourced from the original manufacturer or authorized distributors?
All MAX153CAP+ 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 MAX153CAP+ meets industry standards.
7.What is the process for return or replacement of MAX153CAP+?
All MAX153CAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX153CAP+, 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 MAX153CAP+ part is unused and in its original packaging.
Return procedure for MAX153CAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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