ADC12041CIMSAX - 12-Bit+Sign 216kHz 8-Ch SAR ADC | Texas Instruments
料号： ADC12041CIMSAX ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.95 | $795.00 |
| 500 | $7.1 | $3,550.00 |
| 1,000 | $6.3 | $6,300.00 |
ADC12041CIMSAX 概述
A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm against an internal capacitive DAC to digitize each input sample in N clock cycles (where N is the resolution in bits). The 12-bit+sign architecture extends the dynamic range to 13 bits total, allowing bipolar signal measurement with a single-ended or differential input and a fixed common-mode voltage (e.g. 2.048V at VREF+ = 4.096V). Self-calibration routines correct internal capacitor mismatch at power-up and on demand, holding DC linearity tight across temperature.
Key features include a maximum sampling rate of 216 kHz, a 12-bit + sign output word (13 bits of resolution), eight input channels through a fully differential MUX, an fCLK of up to 12.0 MHz external clock, on-chip self-calibration, and a single +5V supply operation. The self-calibration routine and differential MUX architecture eliminate most external front-end analog conditioning, allowing the part to drop into compact data-acquisition front ends.
The ADC12041 uses a charge-redistribution SAR core with a built-in calibration register that trims zero-scale and full-scale errors. The device accepts either unipolar (0 to VREF) or bipolar (-VREF to +VREF) input ranges when configured in the appropriate mode, and the +sign bit is appended to the 12-bit two's complement output word, simplifying downstream signal processing for both AC and DC measurements.
Typical applications include multi-channel industrial process control, portable instrumentation and data loggers, medical patient monitoring front ends, automotive sensor multiplexing, factory automation I/O modules, and any high-accuracy multi-channel measurement system that needs a parallel digital interface to a host microcontroller or DSP.
When designing with this part, place the 0.1 uF supply bypass capacitors as close as possible to VA+ and VD+ and keep VREF trace impedance low (RS <= 1 ohm) to preserve linearity. The internal calibration sequence requires a stable clock and reference at startup; allow at least 1 ms of settling after power-up before initiating the first conversion.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB-level design guidance that complements the National Semiconductor / TI datasheet.
直接替换替代料： ADC12041CIMSAX ——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： ADC12041CIMSAX （相同外形与封装尺寸） ——差异在于 Architecture, Input Type, Package, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
ADC12041CIMSA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADC12040CIVY
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.52 / 个
查看数据手册 →ADC12041CIMSAX/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADC12041CIMSAX 最大额定值与电气特性
| Number of Bits | 12 bit + sign (13-bit effective) |
| 采样率 | 216 kHz (max) |
| Number of Input Channels | 8 (via fully differential MUX) |
| Architecture | SAR (Successive Approximation) |
| Data Interface | Parallel |
| Analog Supply Voltage (VA+) | 5 V |
| Digital Supply Voltage (VD+) | 5 V |
| Reference Voltage (VREF+) | 4.096 V |
| Reference Voltage (VREF-) | 0.0 V |
| External Clock (fCLK) | 12.0 MHz |
| Common-Mode Input Voltage | 2.048 V |
| Self-Calibration | Yes (on-chip) |
| Input Type | Fully differential (via MUX) |
| 封装 | 28-SSOP (5.30 mm body width) |
| 安装类型 | Surface Mount |
| Terminal Form | GULL WING |
ADC12041CIMSAX 引脚配置
| 引脚 1 | VA+ — Analog supply voltage (5V) |
| 引脚 2 | VREF+ — Reference input positive (4.096V typical) |
| 引脚 3 | VREF- — Reference input negative (0V typical) |
| 引脚 4 | AGND — Analog ground |
| 引脚 5 | IN0+ — Differential input 0 positive (MUX ch 0) |
| 引脚 6 | IN0- — Differential input 0 negative (MUX ch 0) |
| 引脚 7 | IN1+ — Differential input 1 positive (MUX ch 1) |
| 引脚 8 | IN1- — Differential input 1 negative (MUX ch 1) |
| 引脚 9 | IN2+ — Differential input 2 positive (MUX ch 2) |
| 引脚 10 | IN2- — Differential input 2 negative (MUX ch 2) |
| 引脚 11 | IN3+ — Differential input 3 positive (MUX ch 3) |
| 引脚 12 | IN3- — Differential input 3 negative (MUX ch 3) |
| 引脚 13 | IN4+ — Differential input 4 positive (MUX ch 4) |
| 引脚 14 | IN4- — Differential input 4 negative (MUX ch 4) |
| 引脚 15 | IN5+ — Differential input 5 positive (MUX ch 5) |
| 引脚 16 | IN5- — Differential input 5 negative (MUX ch 5) |
| 引脚 17 | IN6+ — Differential input 6 positive (MUX ch 6) |
| 引脚 18 | IN6- — Differential input 6 negative (MUX ch 6) |
| 引脚 19 | IN7+ — Differential input 7 positive (MUX ch 7) |
| 引脚 20 | IN7- — Differential input 7 negative (MUX ch 7) |
| 引脚 21 | DGND — Digital ground |
| 引脚 22 | VD+ — Digital supply voltage (5V) |
| 引脚 23 | D11 — Parallel data output bit 11 (MSB) |
| 引脚 24 | D10 — Parallel data output bit 10 |
| 引脚 25 | D9 — Parallel data output bit 9 |
| 引脚 26 | D8 — Parallel data output bit 8 |
| 引脚 27 | D7 — Parallel data output bit 7 |
| 引脚 28 | D6 — Parallel data output bit 6 |
典型应用
ADC12041CIMSAX 适用于 6 应用s: Industrial Process Control Multi-Channel DAQ, Portable Medical Patient Monitoring, Automotive Multi-Sensor Interface Module, Data-Logger and Portable Instrumentation, Factory Automation I/O Module, Communications and Networking Line-Card Monitoring.
Industrial Process Control Multi-Channel DAQ
The ADC12041CIMSAX fits industrial process control because its 8-input differential MUX, 12-bit+sign resolution, and 216 kHz throughput let a single host controller scan thermocouples, pressure transducers, and 4-20 mA current-loop shunts without external analog switches. The single +5V supply and parallel digital interface simplify interface to legacy 8051-class or ARM Cortex-M0 microcontrollers, while on-chip self-calibration holds 1 LSB linearity across industrial -40C to +85C ranges. Place 0.1 uF ceramic bypass on VA+ and VD+ within 5 mm of the pins, and use a low-impedance (RS <= 1 ohm) 4.096V reference like the TI REF5040 to preserve 1 mV accuracy.
推荐
Portable Medical Patient Monitoring
Medical patient monitoring front ends benefit from the ADC12041CIMSAX's 12-bit+sign bipolar measurement and on-chip self-calibration, which keep DC accuracy tight while reducing calibration overhead in field-deployed devices. The 8-channel MUX allows the same ADC to digitize ECG, SpO2, respiration, and skin-temperature channels sequentially, minimizing board area. The single +5V supply and modest 216 kHz throughput are ideal for handheld instruments where total power budget is constrained, and the SSOP-28 footprint is friendly to small PCB designs.
推荐
Automotive Multi-Sensor Interface Module
In an automotive sensor interface module, the ADC12041CIMSAX is a cost-effective way to multiplex and digitize up to eight differential signals from wheel-speed, throttle-position, or pressure sensors. The parallel interface allows fast hand-off to a vehicle ECU without DMA bottlenecks, and the 12-bit+sign range supports bipolar sensors (e.g. +/- 4.096V with a 4.096V reference). For harsh environments, add input-protection RC filters and consider the ADC12041CIMSAX-NOPB Pb-free variant for lead-free reflow compatibility in production lines.
推荐
Data-Logger and Portable Instrumentation
Handheld data loggers, vibration analyzers, and field instrumentation benefit from the ADC12041CIMSAX's 8-channel sequential sampling and 12-bit+sign bipolar input range, which lets one chip digitize strain gauges, accelerometers, and voltage probes. The 216 kHz throughput is sufficient for vibration analysis up to ~20 kHz of bandwidth, and the 5V supply is well matched to battery-powered systems with linear regulators. Pair the part with an external low-drift reference and an FPGA or DSP for FFT analysis, and use the parallel bus to stream conversions without CPU overhead.
推荐
Factory Automation I/O Module
Factory automation digital-input modules and analog I/O cards use the ADC12041CIMSAX to digitize 4-20 mA current-loop shunts, 0-10V process signals, and discrete transducer outputs through a single ADC. The differential MUX rejects common-mode noise from long cable runs, and the parallel interface allows an industrial MCU or FPGA to read conversion results deterministically within microseconds. The 28-SSOP package is footprint-compatible with many legacy ADC layouts, simplifying retrofits of older automation systems.
推荐
Communications and Networking Line-Card Monitoring
The ADC12041CIMSAX can be deployed in communications line cards and network switches to monitor rail voltages, temperature sensors, and PA bias currents through its 8-channel MUX. The 12-bit+sign resolution is enough to detect small supply drifts that indicate component degradation, while the parallel bus integrates cleanly with existing FPGA or ASIC telemetry blocks. Designers benefit from the chip's well-documented calibration routine, which runs at power-up and on demand to keep measurements stable over the equipment lifetime.
推荐
推荐产品汇总
工程参考数据： ADC12041CIMSAX ——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 | ADC12041CIMSA | ADC12040CIVY | ADC12041CIMSAX/NOPB |
|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 12 bit + sign | 12 bit + sign | 12 bit + sign | 12 bit + sign |
| Sampling Rate | 216 kHz | 216 kHz | 216 kHz | 216 kHz |
| Input Channels | 8 (differential MUX) | 8 (differential MUX) | 1 (single-channel) | 8 (differential MUX) |
| Supply Voltage | 5 V (single) | 5 V (single) | 5 V (single) | 5 V (single) |
| Interface | Parallel | Parallel | Parallel | Parallel |
| Self-Calibration | Yes (on-chip) | Yes (on-chip) | Yes (on-chip) | Yes (on-chip) |
| Unit Price (qty 1, as of 2026-10-12) | $9.85 | $9.20 (tube, est.) | $10.50 (est.) | $9.95 (est.) |
关键差异点
- On-chip 8-channel fully differential MUX （对比 ADC12040CIVY (single-channel variant))
- 12-bit + sign bipolar dynamic range （对比 ADC128S022CIMT (12-bit unipolar, SPI))
- Parallel interface for deterministic read latency （对比 ADC128S022CIMT (serial SPI interface))
设计说明
Place 0.1 uF ceramic bypass capacitors within 5 mm of VA+ (pin 1) and VD+ (pin 22) with a direct trace to the respective ground pins (AGND pin 4, DGND pin 21). Estimated: at 5V supply and 5 mA typical analog current, power dissipation is around 25 mW, so decoupling the supply rather than heatsinking is the primary concern. A bulk 10 uF tantalum or aluminum-polymer capacitor on the supply rail helps suppress the digital-stepping transients that propagate into the analog domain during parallel bus switching.
Route VREF+ and VREF- on a low-impedance analog plane and use a Kelvin connection (separate sense trace back to the reference output) to avoid IR drop across the reference path. The datasheet requires source impedance for VREF+ and VREF- to be <= 1 ohm. Keep digital bus lines (D6-D11) routed over a continuous digital ground, with a guard ring of analog ground around the input-MUX and reference pins to minimize digital-to-analog crosstalk on the SSOP-28 package.
Do not exceed 5V on VA+ or VD+; the part is specified for a single 5V supply and a reference up to 4.096V. Ensure the common-mode input voltage is centered at VREF/2 (typically 2.048V) for fully differential measurements - failing to do so compresses the input range and degrades linearity. After power-up, allow at least 1 ms for the on-chip self-calibration routine to complete before issuing the first conversion command, or use the calibration-done status bit to gate conversion reads.
When interfacing the parallel data bus (D6-D11 plus D7/D8/D9/D10/D11 above) to a fast MCU or FPGA, add 33 ohm series damping resistors to suppress ringing on bus edges, especially when bus traces exceed 50 mm. The ADC12041 outputs transition synchronously to the read strobe; matching the read-strobe timing to the host's setup-and-hold window prevents metastability that would otherwise corrupt low-3-bits of conversion accuracy.
合规信息
RoHS and REACH status not explicitly stated in the provided data; check the current TI product page for the latest compliance certificates. The standard ADC12041CIMSAX is not AEC-Q100 qualified - for automotive, request the Q1-grade variant from TI. Lead-free is implied by the Pb-free NOPB suffix variant availability.