MAX1070ETC+ - 1.5Msps 10-Bit Differential ADC | Maxim Integrated
料号： MAX1070ETC+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.4 | $1.40 |
| 10 | $1.25 | $12.50 |
| 100 | $1.1 | $110.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.85 | $850.00 |
MAX1070ETC+ 概述
What is a SAR ADC? A successive-approximation-register (SAR) ADC is a type of analog-to-digital converter that uses a binary search through an internal DAC to converge on the input voltage, producing a digital output word in N conversion clock cycles for an N-bit result. SAR ADCs sit in the broader taxonomy: ADC -> data converter -> mixed-signal IC -> semiconductor. They are valued for their deterministic latency, low power consumption, and excellent DC accuracy compared with delta-sigma or pipeline architectures.
The MAX1070ETC+ operates from a single +3V supply and accepts true-differential analog inputs, making it well-suited for rejecting common-mode noise in motor-control, instrumentation, and sensor-signal applications. Key differentiating specifications include the 1.5Msps sampling rate, true-differential input architecture, low power consumption, and a compact 12-pin TQFN-EP package with an exposed thermal pad for improved thermal performance.
The MAX1070ETC+ uses a successive-approximation-register (SAR) core with an internal track/hold, input multiplexer, and high-speed serial interface. The device accepts true-differential analog inputs that simplify direct connection to bridge sensors, thermocouples, and current-shunt amplifiers without external signal-conditioning op-amps.
Typical applications include industrial process control, motor control and feedback loops, portable instrumentation, data acquisition systems, and sensor signal chains. The 1.5Msps throughput enables oversampling for averaging or digital filtering of low-frequency signals.
When designing with this ADC, ensure the serial clock (SCLK) timing meets the datasheet setup-and-hold requirements. Place a 0.1uF bypass capacitor close to the supply pin and follow PCB layout guidelines to minimize digital-feedthrough coupling into the analog inputs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： MAX1070ETC+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX1070ETC+ （相同外形与封装尺寸） ——差异在于 Data Interface, Package, Architecture, Number of Channels, Resolution.
快速对比工具——选择替代料号进行并排对比：
MAX1070CTC+
✅ 直接替换✓ 有现货
$5.18 / 个
查看数据手册 →MAX1070ETC+T
✅ 直接替换✓ 有现货
$4.1 / 个
查看数据手册 →MAX1071ETC+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1070ETC+ 最大额定值与电气特性
| Architecture | SAR (Successive Approximation Register) |
| 分辨率 | 10 bit |
| 采样率 | 1.5 Msps |
| Number of Channels | 1 (Single) |
| Input Configuration | True Differential |
| Data Interface | Serial |
| 电源电压 | 3 V (single supply) |
| Supply Type | Single Supply |
| 封装 | 12-pin TQFN-EP |
| 安装类型 | Surface Mount |
| 引脚数 | 12 |
| Package Code | HVQCCN / TQFN-EP |
MAX1070ETC+ 引脚配置
| 引脚 1 | IN+ — Positive analog differential input |
| 引脚 2 | IN- — Negative analog differential input |
| 引脚 3 | GND — Analog ground |
| 引脚 4 | REF — External reference voltage input |
| 引脚 5 | AVDD — Analog supply voltage (+3V) |
| 引脚 6 | DVDD — Digital supply voltage |
| 引脚 7 | CS — Chip select (active low) |
| 引脚 8 | SCLK — Serial clock input |
| 引脚 9 | DOUT — Serial data output |
| 引脚 10 | NC — Not connected (per datasheet) |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | EP — Exposed pad - thermal/ground connection |
典型应用
MAX1070ETC+ 适用于 6 应用s: Industrial Process Control, Motor Control Feedback, Portable Instrumentation, Data Acquisition Systems, Sensor Signal Chains, Audio Signal Digitization (Low-Cost).
Industrial Process Control
The MAX1070ETC+ suits industrial process control loops where 4-20mA current-loop and bridge-sensor signals must be digitized at moderate speed. The true-differential analog inputs directly accept outputs from instrumentation amplifiers without external level-shifting op-amps, reducing BOM by 2-3 components. With 1.5Msps throughput, the ADC oversamples by 16x-32x typical process-control bandwidths (10kHz), enabling moving-average digital filtering that improves effective resolution by ~2 bits and reduces noise to <1 LSB RMS. The single +3V supply aligns with 3.3V PLC backplane rails, simplifying power-tree design.
推荐
Motor Control Feedback
The MAX1070ETC+ fits motor control feedback loops in BLDC, stepper, and servo drives where phase currents must be sampled synchronously with PWM. True-differential inputs reject the large common-mode dv/dt from the PWM switching node, eliminating the need for isolated current sensors in low-voltage (<60V) drives. At 1.5Msps, the ADC captures current transients during PWM edge transitions within microseconds, supporting field-oriented control (FOC) algorithms running on TI C2000 or ARM Cortex-M4F microcontrollers. The serial SPI-compatible interface minimizes MCU pin count and PCB routing complexity.
推荐
Portable Instrumentation
The MAX1070ETC+ suits battery-powered portable instruments such as handheld multimeters, data loggers, and field test equipment. The single +3V supply operation aligns directly with two AA alkaline cells or a single Li-ion cell with LDO regulation, eliminating boost converters that add noise. Low power consumption per the Maxim datasheet extends battery life, and the 1.5Msps throughput supports transient capture of sensor events. The 12-pin TQFN-EP package measures only 4mm x 4mm, fitting compact handheld enclosures without sacrificing ADC performance.
推荐
Data Acquisition Systems
The MAX1070ETC+ serves multi-channel data acquisition systems where a single ADC plus external analog multiplexer replaces more expensive multi-channel parts. At 1.5Msps, switching through 8-16 multiplexer channels at 100ksps per channel delivers aggregate throughput that exceeds many 14-16 bit DAQ systems for low-channel-count applications. The serial output interfaces directly to FPGA or MCU SPI peripherals, allowing channel-sequencing logic in software rather than dedicated silicon. The differential inputs reject ground loops between remote sensors and the DAQ chassis.
推荐
Sensor Signal Chains
The MAX1070ETC+ is suitable for digitizing strain-gauge bridge outputs, thermocouple EMF voltages, and RTD-conditioned signals in industrial sensors. True-differential inputs reject 50Hz/60Hz common-mode interference from power-line coupling, often eliminating the need for additional right-leg-drive or shielding circuits. The 1.5Msps rate allows digital calibration routines to capture sensor zero-point and span in real time, supporting in-field recalibration without downtime. Reference voltage scaling is straightforward since the device accepts standard +2.5V or +3V external references.
推荐
Audio Signal Digitization (Low-Cost)
The MAX1070ETC+ handles low-cost audio digitization in toy and consumer products where 10-bit resolution is acceptable for voice playback or simple alert-tone capture. The 1.5Msps rate supports audio-bandwidth sampling at ~70kHz per channel after Nyquist considerations. The serial interface streams directly to DSP or microcontroller I2S-like peripherals. While not a replacement for dedicated 16-24 bit audio ADCs, the MAX1070ETC+ provides a compelling cost/performance trade-off for non-critical audio applications.
推荐
推荐产品汇总
工程参考数据： MAX1070ETC+ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX1070CTC+ | MAX1070ETC+T | MAX1071ETC+ |
|---|---|---|---|---|
| Package | 12-pin TQFN-EP | 12-pin TQFN-EP - same | 12-pin TQFN-EP - same | 12-pin TQFN-EP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Sampling Rate | 1.5 Msps | 1.5 Msps | 1.5 Msps | 1.5 Msps |
| Input Type | True Differential | True Differential | True Differential | True Differential |
| Reference | External | External | External | Internal 2.5V |
| Temperature Grade | Industrial/Extended | Commercial | Industrial/Extended | Industrial/Extended |
| Interface | Serial (SPI/QSPI/MICROWIRE) | Serial (SPI/QSPI/MICROWIRE) | Serial (SPI/QSPI/MICROWIRE) | Serial (SPI/QSPI/MICROWIRE) |
关键差异点
- True-differential input architecture in a 12-pin TQFN-EP （对比 MAX1070CTC+)
- External reference allows user-controlled precision （对比 MAX1071ETC+)
- Higher sampling rate than competing 10-bit ADCs （对比 ADS8318 (TI))
设计说明
Place a 0.1uF ceramic bypass capacitor within 5mm of the AVDD pin and a 10uF bulk capacitor on each supply rail. The exposed pad (EP) of the TQFN-12 package must be soldered to a continuous ground pour of at least 0.5 square inches to provide low-impedance thermal dissipation and a clean analog ground reference. Separate analog and digital ground planes should be joined at a single point near the ADC.
Route the SCLK and DOUT traces as short as possible, maintaining 50 ohm characteristic impedance and avoiding parallel runs with the analog input traces for at least 3mm of separation. The serial clock frequency should not exceed the datasheet maximum to avoid conversion errors. Consider a small RC filter (10 ohm + 10pF) on DOUT to dampen ringing if the trace length exceeds 25mm.
Do not float the REF pin - it requires a stable external reference voltage (typically +2.5V) with low impedance (less than 1 ohm source impedance at DC). Failing to provide adequate REF decoupling causes degraded linearity and INL errors. Ensure CS transitions meet the datasheet timing setup-and-hold requirements relative to SCLK rising edges to avoid framing errors in the serial output.
合规信息
Lead-free per Maxim Integrated product marking convention. RoHS, REACH, halogen-free, and conflict-minerals compliance status not explicitly stated in provided web data; consult manufacturer datasheet or product declaration for confirmation.
