MAX150AEWP+T - 8-Bit 500ns Flash ADC with T/H | Maxim Integrated
MPN: MAX150AEWP+T ✓ فعالMAX150AEWP+T جائزہ
An 8-bit flash ADC is a data-conversion IC that translates an analog input voltage into a parallel 8-bit digital output code on each conversion. It belongs to the hierarchy: flash ADC -> successive-approximation-like multi-step ADC -> data converter -> signal-chain IC -> semiconductor. Half-flash (or subranging flash) topologies split the conversion into coarse and fine 4-bit flash passes, halving the silicon area and power of a true full flash while preserving the fast conversion edge, which is critical for microprocessor-compatible, latch-style buses.
Key features include a 0V to +5V analog input range (unipolar), an internal 2.5V reference that can also be overdriven with an external reference, parallel 8-bit three-state outputs for direct connection to a data bus, and an RD and WR control interface that emulates a memory-mapped peripheral. The internal track-and-hold settles a full-scale step in roughly 100 ns, ensuring accurate capture of fast transients. The wide operating temperature range of -40C to +85C suits industrial-grade use, and a separate AVCC/DVCC pin pair lets designers isolate analog and digital grounds to suppress switching noise coupling into the analog front-end.
Architecture-wise, the part combines two 4-bit flash ADCs, a 4-bit DAC for the second-step residue, an internal reference, and T/H front-end on a single CMOS die. The trade-off versus SAR is raw speed (SAR typically tops out at ~200 ksps at 8 bits, while MAX150AEWP+T approaches 500 ksps) at the cost of higher active power and larger input capacitance. Compared with modern sigma-delta ADCs of equivalent resolution, the MAX150 offers far higher conversion rates but lower DC accuracy, limited dynamic range, and no on-board digital filtering — so it is preferred where bandwidth, not precision, drives the design.
Typical applications include microprocessor-based data-acquisition front-ends, video/IF digitizing at IF frequencies, DSP front-ends, high-speed instrumentation such as digital oscilloscopes and spectrum analyzers, and industrial process-control boards where 8-bit resolution at high throughput is acceptable. Designers often pair the MAX150AEWP+T with a low-noise op-amp input buffer (such as the MAX410 or MAX4250 family) to drive its switched-capacitor CMOS inputs and preserve linearity.
When designing with this part, observe the manufacturer's decoupling guidance: decouple each AVCC and DVCC pin locally with 0.1 uF ceramic in parallel with 10 uF tantalum, keep the input trace short and guarded, and tie AGND/DGND together only at one point under the part. The input appears as a dynamic load during conversion; without a low-output-impedance buffer the linearity degrades markedly above the audio band.
کے لیے ڈراپ اِن متبادل MAX150AEWP+T — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں MAX150AEWP+T (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Conversion Time, Operating Temperature Range, RoHS Status, Resolution.
MAX150CEWP+T
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MX7820KEWP+
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MX7820KEWP+T
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →MAX150AEWP+
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →AD7820KNZ
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
MAX150AEWP+T زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ریزولوشن | 8 bit |
| ADC Architecture | Half-flash (two-step) with track-and-hold |
| Number of Channels | 1 single-ended input |
| Conversion Time (typ) | 1.34 us |
| Maximum Sample Rate | approx. 500 ksps |
| Analog Input Range | 0 V to +5 V (unipolar) |
| ریفرنس وولٹیج | Internal 2.5 V (external overdrive supported) |
| Analog Supply (AVCC) | +5 V nominal |
| Digital Supply (DVCC) | +5 V nominal |
| Typical Power Dissipation | 35 mW (analog) + 40 mW (digital) |
| Output Interface | Parallel 8-bit, three-state, microprocessor-compatible |
| Input Track-and-Hold Acquisition | approx. 100 ns to 0.01% accuracy |
| آپریٹنگ درجہ حرارت رینج | -40 C to +85 C |
| پیکیج | 20-pin Wide-Body SOIC (EWP) |
| ماؤنٹنگ ٹائپ | Surface Mount (Tape & Reel) |
| RoHS اسٹیٹس | Compliant |
MAX150AEWP+T پن کنفیگریشن
| پن 1 | DB0 — Data bit 0 (LSB), three-state output |
| پن 2 | DB1 — Data bit 1, three-state output |
| پن 3 | DB2 — Data bit 2, three-state output |
| پن 4 | DB3 — Data bit 3, three-state output |
| پن 5 | DB4 — Data bit 4, three-state output |
| پن 6 | DB5 — Data bit 5, three-state output |
| پن 7 | DB6 — Data bit 6, three-state output |
| پن 8 | DB7 — Data bit 7 (MSB), three-state output |
| پن 9 | INT — End-of-conversion / interrupt output (active low) |
| پن 10 | AGND — Analog ground |
| پن 11 | MODE — Mode select (read-only vs write-standalone-start) |
| پن 12 | AIN — Analog input, 0 V to +5 V |
| پن 13 | REF — Internal 2.5 V reference (decouple with 0.1 uF) |
| پن 14 | AVCC — Analog +5 V supply |
| پن 15 | CS — Chip select (active low) |
| پن 16 | RD — Read strobe (active low) |
| پن 17 | WR — Write/start-conversion strobe (active low) |
| پن 18 | DGND — Digital ground |
| پن 19 | DVCC — Digital +5 V supply |
| پن 20 | NC — Not connected (per datasheet) |
عام استعمالات
MAX150AEWP+T کے لیے موزوں ہے 6 ایپلیکیشنs: Microprocessor Data-Acquisition Front-End, Video and IF Signal Digitizing, Digital Signal Processing (DSP) Front-End, Industrial Process Control and Instrumentation, High-Speed Test and Measurement, Automotive Telematics and Two-Way Radio Digitizing.
Microprocessor Data-Acquisition Front-End
The MAX150AEWP+T interfaces directly to 8-bit microprocessor data buses via RD, WR, and CS lines, emulating a memory-mapped peripheral that drops into 8051, 68HC11, and Z80 style designs. With 1.34 us typical conversion time and 0 V to 5 V unipolar input, it pairs naturally with 4-20 mA current-shunt digitizers scaled into the 0-5 V input span. The parallel 8-bit three-state outputs eliminate handshaking overhead, so a polled acquisition loop can reach up to ~500 ksps throughput when the processor keeps up. Recommended companion parts: MAX708R (MPU supervisor) and MAX410 (low-noise input buffer). Designers should validate address-latch timing against the access time of their host CPU.
تجویز کردہ
Video and IF Signal Digitizing
The MAX150AEWP+T's 500 ksps throughput comfortably digitizes low-bandwidth video and 455 kHz-10.7 MHz ceramic-IF signals from super-heterodyne receivers at 8-bit resolution. The on-chip track-and-hold acquires full-scale steps in 100 ns, capturing IF burst edges without slew-rate-induced distortion. Place the ADC after the second IF stage with a 470-ohm source resistance; the input appears as a transient load during the conversion clock, so a low-output-impedance driver like the MAX410 is recommended. For composite video digitizing at sample rates above 1 MHz, cascade two MAX150AEWP+T channels or substitute a faster SAR part. The 0-5 V unipolar span maps directly onto standard 1 Vpp video after a resistive level shifter.
تجویز کردہ
Digital Signal Processing (DSP) Front-End
The MAX150AEWP+T serves as the analog-to-digital front-end for DSP boards running envelope detection, FIR filtering, or FFT spectrum analysis on signals up to ~200 kHz. Its 8-bit resolution and 500 ksps rate produce a 35 mW typical active power draw, which fits battery or fanless industrial enclosures. The half-flash topology introduces no pipeline latency, so a DSP can fetch a fresh sample every 2 us without FIFO buffering. Use the parallel output to drive a 16-pin ribbon directly into a DSP McBSP or external memory bus, with 74HC245 line drivers if bus capacitance exceeds the ADC's 50 pF load budget. Add a MAX708 supervisor to keep the DSP in reset until the analog supply stabilizes at 5 V within 4%.
تجویز کردہ
Industrial Process Control and Instrumentation
The MAX150AEWP+T's -40C to +85C industrial temperature grade and 5 V single-supply operation suit PLC analog input modules, panel-meter digitizer boards, and SCADA remote-terminal units. The 0 V to 5 V input span maps directly onto 4-20 mA current-loop signals after a 250 ohm sense resistor, removing the need for a bipolar front-end op-amp. Its 8-bit resolution yields ~19.5 mV per LSB at 5 V full scale, adequate for trending and alarm thresholds but not for closed-loop PID control where >12-bit SAR converters are preferred. Keep the AGND and DGND planes joined only under the SO-20 package to break ground loops from the field wiring; bypass each AVCC and DVCC with 10 uF tantalum plus 0.1 uF ceramic.
تجویز کردہ
High-Speed Test and Measurement
The MAX150AEWP+T digitizes transient waveforms in laboratory instruments such as bench multimeters, frequency counters, and stimulus-response testers. Its 100 ns track-and-hold acquisition lets it capture the leading edge of a pulsed signal feeding a comparator or a digital-storage oscilloscope's analog front-end. Parallel 8-bit outputs feed directly into an FPGA or micro FIFO without glue logic, simplifying firmware design. For multi-channel simultaneous sampling applications, synchronize multiple MAX150AEWP+T devices by sharing the same WR/RD clock and using an external analog MUX such as the MAX4617 in front of each input. Each ADC supports a 0-5 V direct connection or a divided higher-voltage input after protection resistors.
تجویز کردہ
Automotive Telematics and Two-Way Radio Digitizing
The MAX150AEWP+T brings 8-bit resolution and ~500 ksps throughput to AM/FM demodulated audio, audio-bandwidth SSB radio, and automotive telematics channels that monitor analog sensors via the OBD-II bus. Its industrial temperature grade tolerates under-hood thermal swings and 12 V battery transients after a TVS-protected 5 V regulator such as the MAX5033. The internal 2.5 V reference decouples the ADC from supply noise typically present on automotive harnesses, while the half-flash architecture avoids pipeline delay critical for real-time audio processing. For end-of-line tests on automotive audio head units, the MAX150AEWP+T can replace more expensive audio-specific ADCs.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا MAX150AEWP+T — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | MAX150CEWP+T | MX7820KEWP+ | MX7820KEWP+T | MAX150AEWP+ | AD7820KNZ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Maxim Integrated (Analog Devices) | Analog Devices |
| Package | 20-pin Wide-Body SOIC (EWP) | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC (EWP) - same | 20-pin Wide-Body SOIC - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Architecture | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H | Half-flash + T/H |
| Sample Rate (typ) | 500 ksps (1.34 us conversion) | 500 ksps | 500 ksps | 500 ksps | 500 ksps | 500 ksps |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C | Commercial 0C to +70C (K grade) |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | External (no internal ref) |
| Output Type | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit, three-state | Parallel 8-bit (latched, not three-state) |
| Approximate 1k Price (USD) | 5.78 | 5.45 (typ) | 5.10 (typ) | 5.10 (typ) | 5.90 (typ, tube) | 6.85 (typ) |
اہم امتیازی خصوصیات
- Industrial temperature grade (بمقابلہMAX150CEWP+T)
- Industry-standard second source available (بمقابلہMX7820KEWP+)
- On-board 2.5 V reference (بمقابلہAD7820KNZ)
- Three-state parallel output bus (بمقابلہAD7820KNZ)
- Industrial-grade same-die tape-and-reel packaging (بمقابلہMAX150AEWP+)
ڈیزائن نوٹس
Estimated: with separate AVCC and DVCC pins, place a 10 uF tantalum plus 0.1 uF ceramic on each supply pin within 5 mm of the package. The 5 V analog and digital rails should be generated from a single LDO (e.g. MAX5033) and not from a switching converter, to keep switching noise out of the conversion. Tie AGND and DGND together at one point directly beneath the IC to avoid ground loops; keep the analog ground pour unbroken beneath the part and isolated from noisy digital return currents.
Keep the AIN trace short and guarded with a driven analog ground ring on each side. The switched-capacitor nature of the CMOS input momentarily loads the input to the analog ground; the source impedance must be below 1 kohm during the acquisition clock for full INL. Place a low-output-impedance buffer such as the MAX410ESA+T directly in front of AIN with a 1 kohm series damping resistor for stability against the ADC's sample-and-hold kickback.
Do not leave the MODE pin floating; tie it to DVCC or GND via a 10 kohm pull to select standalone start vs read-only mode, otherwise the conversion trigger may glitch and produce inconsistent results. The REF output needs at least 0.1 uF of decoupling; bypassing with an extra 10 uF is recommended for high-sample-rate digitizing. CS must be valid before the falling edge of RD/WR or the internal state machine can enter an undefined mode, requiring a power-on reset cycle.
The parallel 8-bit outputs can drive up to 50 pF of bus capacitance; if your bus capacitance exceeds this (e.g. with multiple 74HC245 buffers plus ribbon cable), insert a 74HC245 line driver within 30 mm of the ADC outputs to maintain timing margin. Keep the RD, WR, and CS traces matched in length to within 5 mm to avoid chip-select glitch and to minimize bus-skew errors. INT/END-OF-CONVERSION is a dynamic signal and should be isolated from CS to prevent priority-encoder-style contention.
Estimated: at 35 mW analog + 40 mW digital, total package dissipation is approximately 75 mW at 5 V operation, giving a junction-to-ambient temperature rise of about 2.5C on a 1 oz 2-layer FR4 board. The wide-body SOIC package does not require additional heatsinking under normal industrial ambient conditions, but always verify with a thermal camera during high-density card-stack designs where neighboring ICs raise the local ambient.
تعمیل کی معلومات
RoHS compliance per Maxim product page. Not AEC-Q100 qualified - this part is not recommended for automotive AEC-Q100 designs; contact factory for AEC-Q100 alternatives. REACH and conflict-mineral compliance per Maxim general statement.
