MAX1203AEPP - 12-Bit 8-Ch SAR ADC, 133ksps | Maxim Integrated
部品番号: MAX1203AEPP ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $11.71 | $11.71 |
| 10 | $10.78 | $107.80 |
| 100 | $9.42 | $942.00 |
| 500 | $8.49 | $4,245.00 |
| 1,000 | $7.55 | $7,550.00 |
MAX1203AEPP 概要
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog voltage and converts it into a discrete digital code that can be processed by a microcontroller, DSP, or FPGA. Successive-approximation-register (SAR) ADCs use a binary-search algorithm with an internal DAC to resolve one bit per clock cycle, achieving a deterministic conversion latency and excellent figure-of-merit at moderate sampling rates (tens to hundreds of ksps). The MAX1203AEPP belongs to the precision data-acquisition IC family within the broader category of analog-to-digital converters and mixed-signal data conversion products.
Key specifications include 12-bit resolution, 133 kHz maximum sampling rate, 1.5 mA operating current, and 2 µA power-down current. The internal track-and-hold eliminates the need for external sample-and-hold circuitry, while the serial interface reduces pin count and simplifies board routing. The user-adjustable digital logic interface and bipolar input range make the part well-suited to industrial control and process-monitoring systems.
Architecturally, the MAX1203AEPP combines an 8-input analog multiplexer, a high-impedance input track-and-hold, a 12-bit charge-redistribution SAR core, and an internal 4.096V reference. The user-selectable reference (internal or external up to 4.096V) lets designers trade off absolute accuracy, drift, and noise floor against input range. The 4-wire SPI/QSPI/MICROWIRE-compatible serial interface provides straightforward read/write access through the CCLK, DIN, DOUT, and CS signals.
Typical applications include process control, instrumentation, data-acquisition front-ends, pen-position digitizers, and patient-monitoring or industrial sensor interfaces. Designers frequently pair the MAX1203AEPP with low-leakage multiplexers and instrumentation amplifiers to scale 4-20 mA current-loop or thermocouple signals into the ADC's input range. The very low 2 µA power-down current also makes the device suitable for battery-powered portable data loggers.
When designing with the MAX1203AEPP, place the 0.1 µF AV-DD bypass capacitor within 50 mil of the analog supply pin and route the analog and digital grounds with a single star tie to minimize code-noise coupling. Reference bypassing with 4.7 µF and 0.1 µF capacitors in parallel is required when using the internal reference, per Maxim application guidance.
ドロップイン代替品: MAX1203AEPP — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MAX1203AEPP （同一形状・フットプリント） — 相違点: Package, Resolution, Analog Supply Voltage, Operating Temperature, Mounting Type.
クイック比較ツール — 並列比較する代替部品を選択:
MAX1203AEPP+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1203ACPP+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1203BCPP+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1203BEPP+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX1202ACAP
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$7.17 / 個
データシートを見る →MAX1147BEUP+T
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$8.7 / 個
データシートを見る →MAX1165BEUI+T
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$9.3 / 個
データシートを見る →MAX1203AEPP 最大定格＆電気的特性
| 分解能 | 12 bits |
| Number of Channels | 8 single-ended / 4 differential |
| サンプリングレート | 133 ksps |
| Conversion Architecture | SAR (Successive Approximation) |
| Analog Supply Voltage | +5 V single or ±5 V dual |
| Digital Interface Voltage | 2.7 V to 5.25 V (adjustable via DV-DD) |
| Operating Current (active) | 1.5 mA |
| Power-Down Current | 2 µA |
| Input Type | Single-ended or differential, bipolar |
| Internal Reference | 4.096 V |
| External Reference Range | Up to 4.096 V |
| インターフェース | SPI / QSPI / MICROWIRE-compatible serial (4-wire) |
| Track/Hold | Internal |
| パッケージ | 20-pin PDIP (EPP) |
| 動作温度 | -40 °C to +85 °C |
| 実装タイプ | Through-hole |
MAX1203AEPP ピン構成
| ピン 1 | AIN1 — Analog input channel 1 |
| ピン 2 | AIN2 — Analog input channel 2 |
| ピン 3 | AIN3 — Analog input channel 3 |
| ピン 4 | AIN4 — Analog input channel 4 |
| ピン 5 | AV-DD — Analog +5V supply (also accepts +5V from ±5V dual supply) |
| ピン 6 | AV-SS — Analog ground return |
| ピン 7 | DV-DD — Digital interface supply, 2.7V to 5.25V (logic level reference) |
| ピン 8 | DGND — Digital ground |
| ピン 9 | AIN5 — Analog input channel 5 |
| ピン 10 | AIN6 — Analog input channel 6 |
| ピン 11 | AIN7 — Analog input channel 7 |
| ピン 12 | AIN8 — Analog input channel 8 |
| ピン 13 | AIN0 — Analog input channel 0 |
| ピン 14 | REF — Reference bypass pin; 4.7uF+0.1uF to AV-SS when internal reference used |
| ピン 15 | CS — Active-low chip select for serial interface |
| ピン 16 | DOUT — Serial data output (SPI/MICROWIRE) |
| ピン 17 | DIN — Serial data input (SPI/MICROWIRE) |
| ピン 18 | CCLK — Serial clock input |
| ピン 19 | SHDN — Power-down control, active-low (2 µA when asserted) |
| ピン 20 | V-SS — Negative analog supply for dual ±5V operation (tie to AV-SS for single +5V) |
主な用途
MAX1203AEPP の用途: 6 件s: Industrial Process Control PLCs, Data-Acquisition Systems, Pen-Position Digitizers and Touch Screens, Battery-Powered Portable Instrumentation, Patient Monitoring and Medical Sensor Interfaces, Industrial Sensor Signal Conditioning.
Industrial Process Control PLCs
The MAX1203AEPP's 8 single-ended / 4 differential inputs and 12-bit / 133 ksps SAR architecture make it a natural fit for industrial PLC analog front-ends. According to the Maxim datasheet, the 5V analog supply and bipolar input range accept 4-20 mA current-loop signals and 0-5V process variables directly via series resistors. The low 1.5 mA operating current and 2 µA power-down draw help total PLC module power budgets, while the on-chip 4.096V reference and internal track-and-hold eliminate the need for separate signal conditioning. Compared to slower integrating ADCs, the SAR core's deterministic 1 µs-class conversion latency simplifies PID-loop timing in closed-loop valve and motor-control routines.
おすすめ
Data-Acquisition Systems
For 12-bit multiplexed data-acquisition cards, the MAX1203AEPP delivers 133 ksps aggregate throughput with an internal 8-channel mux that removes external analog switches. According to the Maxim datasheet, the SAR architecture provides glitch-free conversion with no pipeline latency, so PC-based DAQ cards can sample and stream multiple channels in deterministic round-robin fashion. The 4-wire serial interface reduces FPGA pin count versus parallel ADCs and the configurable 2.7V-5.25V digital interface supports 3.3V FPGA banks directly. Compared to higher-speed 16-bit ADCs, the 12-bit resolution trades dynamic range for a much lower price point in mainstream measurement cards.
おすすめ
Pen-Position Digitizers and Touch Screens
The MAX1203AEPP's 8-channel input mux is well suited to 4-wire resistive touch-screen and pen-position digitizer designs that read four corners and a pen-tip electrode. According to the Maxim datasheet, the internal track-and-hold and 133 ksps throughput capture the low-impedance touch-panel voltages quickly without external S/H circuitry. The 5V analog supply matches the typical resistive-panel drive voltage, simplifying the analog path between the panel and the ADC inputs. Compared to dedicated touch-screen controllers, the MAX1203AEPP offers more channels and programmability at the cost of higher software complexity.
おすすめ
Battery-Powered Portable Instrumentation
The MAX1203AEPP's 2 µA power-down current makes it well suited to battery-powered handheld meters that spend most of their time in standby. According to the Maxim datasheet, the part draws just 1.5 mA during active conversion and drops to 2 µA when idle, extending battery life by orders of magnitude over always-on ADCs. The 8-channel mux lets a single ADC read multiple sensors - temperature, pressure, flow - in a portable diagnostic device without additional switching. Compared to microcontrollers with integrated ADCs, the MAX1203AEPP provides bipolar true-input functionality and tighter absolute accuracy.
おすすめ
Patient Monitoring and Medical Sensor Interfaces
Medical sensor front-ends benefit from the MAX1203AEPP's bipolar input range, 5V analog supply, and 12-bit resolution that are well matched to ECG, SpO2, and respiration sensor outputs. According to the Maxim datasheet, the user-adjustable digital interface (2.7V-5.25V) connects to 3.3V medical MCUs without level shifters, while the bipolar true-input accepts differential electrode signals directly. The 8 single-ended / 4 differential channels support multi-lead ECG and patient-monitor inputs in a single ADC. Compared to 16/24-bit delta-sigma medical ADCs, the MAX1203AEPP trades resolution for a much faster 133 ksps aggregate rate and a lower price.
おすすめ
Industrial Sensor Signal Conditioning
Strain-gauge, thermocouple, and load-cell instrumentation often uses 12-bit resolution to digitize millivolt-level sensor outputs. The MAX1203AEPP is well suited to these applications because its bipolar input range, internal 4.096V reference, and 8-channel mux support multi-sensor conditioning panels in a single chip. According to the Maxim datasheet, the differential-input mode doubles the effective common-mode rejection, useful for bridge sensors with low-level differential signals. Compared to monolithic instrumentation-amplifier-plus-ADC solutions, the MAX1203AEPP offers simpler bill-of-materials and a more compact PCB.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX1203AEPP — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX1203AEPP+ | MAX1203ACPP+ | MAX1203BCPP+ | MAX1203BEPP+ |
|---|---|---|---|---|---|
| Package | 20-pin PDIP (EPP) | 20-pin PDIP (EPP) | 20-pin PDIP (EPP) | 20-pin PDIP (EPP) | 20-pin PDIP (EPP) |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Channels | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF | 8 SE / 4 DIFF |
| Analog Supply | +5V or ±5V | +5V or ±5V | +5V or ±5V | +5V or ±5V | +5V or ±5V |
| Digital Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE |
| Operating Current | 1.5 mA | 1.5 mA | 1.5 mA | 1.5 mA | 1.5 mA |
| Power-Down Current | 2 µA | 2 µA | 2 µA | 2 µA | 2 µA |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
主な差別化要因
- Industrial operating temperature grade （vs MAX1203ACPP+)
- Lower cost than the B-grade speed-up variant （vs MAX1203BCPP+)
- Dual-rail analog supply and 3V digital interface （vs MAX1203BEPP+)
設計ノート
Estimated: Place a 0.1 µF AV-DD bypass capacitor within 50 mil of pin 5 (AV-DD) and a 4.7 µF capacitor in parallel for the internal reference. Route the analog and digital grounds with a single star-tie back to the system ground to minimize digital switching noise coupling into the analog references. Place reference bypass capacitors (4.7 µF + 0.1 µF) within 100 mil of pin 14 (REF) when using the internal reference, per typical Maxim SAR-ADC layout guidance.
Estimated: For single +5V operation, AV-DD = +5V, AV-SS = 0V, and V-SS = 0V. For dual ±5V operation, AV-DD = +5V, AV-SS = 0V, and V-SS = -5V. Using AGND as a single-supply ground reference keeps the ADC's bipolar-input common-mode range centered. According to the Maxim datasheet, soft-start the analog supply to avoid tripping ESD structures during hot-plug events.
Estimated: To achieve full 12-bit performance, source the analog inputs through low-impedance (under 1 kΩ) drivers. Long input traces or high-impedance source impedance causes integral nonlinearity because the track-and-hold acquisition time becomes input-RC limited. Add a 100 pF X7R ceramic capacitor from each analog input to AV-SS if sensor impedance exceeds 5 kΩ to absorb charge-injection transients.
Estimated: The MAX1203AEPP is bipolar-input in single-5V supply mode (true bipolar, not pseudo-bipolar). Mistakenly operating with a single +5V supply expecting 0-VIN input range (instead of ±VIN) is a common error; verify the V-SS pin is grounded (single-supply) or tied to -5V (dual-supply). Per the Maxim datasheet, the SHDN pin must be held high to operate; floating it disables the converter.
コンプライアンス情報
RoHS and lead-free status not explicitly stated in the verified web data; the bare MAX1203AEPP (without '+') is typically non-RoHS in Maxim's legacy PDIP line. Choose the '+' suffix variant (MAX1203AEPP+) for RoHS compliance - this is documented per the Maxim datasheet suffix convention.
