CS5012A-BL7Z - 12-bit 100kSPS Self-Calibrating SAR ADC | Cirrus Logic
料号： CS5012A-BL7Z ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.25 | $162.50 |
| 100 | $13.9 | $1,390.00 |
| 500 | $11.85 | $5,925.00 |
| 1,000 | $10.4 | $10,400.00 |
CS5012A-BL7Z 概述
A successive-approximation register (SAR) ADC is a sampling data converter that resolves each bit of the output code in a single clock cycle by switching an internal binary-weighted capacitor DAC against the input voltage through a comparator. This topology combines moderate speed with deterministic latency, very low power consumption, and the absence of pipeline delay, which is why SAR converters dominate precision industrial, instrumentation, and medical signal-chain designs. The CS5012A family builds on this principle with a self-calibration routine that keeps offset and full-scale error within 1/2 LSB and guarantees no missing codes at the 12-bit level.
Key specifications include 12-bit resolution, 100 kSPS maximum throughput, a single 5 V analog supply (per family datasheet), unipolar/bipolar input ranges, and 16-/14-/12-bit pin-compatible variants (CS5016/14/12A). The CS5012A-BL7Z sub-version additionally exposes a serial interface option, allowing the same die to be used in low-pin-count microcontroller or DSP front ends. Internal calibration runs automatically on demand, removing the manual trim step that older SAR parts required at production.
Architecturally the converter integrates a fast-slewing on-chip track-and-hold buffer, so the input signal is re-acquired immediately after each conversion. This architecture permits true 100 kSPS throughput without an external buffer amplifier. The 3-state outputs and a single-chip wait/busy handshake make the part drop-in friendly for legacy 8051, 68HC11, and DSP host designs.
Typical applications include precision industrial process control loops, weigh-scale and load-cell digitizers, multi-channel data-acquisition front ends, audio-bandwidth instrumentation, portable medical instrumentation, and legacy 12-bit upgrade paths in motor control and power metering where CS5012A-BL7Z is already on the BOM.
When laying out a board, treat the AVCC/AGND pair as a star: place a 10 uF tantalum plus 0.1 uF ceramic directly at the analog supply pin, and route the analog input trace away from the digital outputs to avoid coupling. The self-calibration routine assumes the supply is settled; power up, wait 50 ms, then issue CAL before the first conversion for published linearity.
This page synthesizes live distributor inventory, parametric drop-in alternatives, and PCB-level design notes that are not duplicated in the manufacturer datasheet.
直接替换替代料： CS5012A-BL7Z ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
CS5014-BL14Z
✅ 直接替换📋 参考替代料（不在目录中）
CS5016-BL16Z
✅ 直接替换📋 参考替代料（不在目录中）
CS5012A-BL7
✅ 直接替换📋 参考替代料（不在目录中）
CS5014-BL14
✅ 直接替换📋 参考替代料（不在目录中）
CS5012A-BL7Z 最大额定值与电气特性
| 分辨率 | 12 bits |
| Conversion Time | 7.2 us |
| Throughput | 100 kSPS |
| Architecture | SAR (Successive Approximation) with self-calibration |
| Number of Channels | 1 |
| Input Range | Unipolar and bipolar (per family datasheet) |
| 接口 | Parallel (word access) or serial (BL7Z variant) |
| Differential Nonlinearity (DNL) | Guaranteed no missing codes |
| Offset Error (post-cal) | 1/2 LSB max (CS5012A) |
| Full-Scale Error (post-cal) | 1/2 LSB max (CS5012A) |
| Track-and-Hold | On-chip, fast-slewing input buffer |
| 封装 | 44-pin PLCC (16.59 x 16.59 mm) |
| 安装类型 | Surface Mount |
CS5012A-BL7Z 44-pin plcc (16.59 x 16.59 mm) 引脚配置指南
CS5012A-BL7Z（44-pin plcc (16.59 x 16.59 mm) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： CS5012A-BL7Z.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CS5012A-BL7Z 适用于 6 应用s: Precision Industrial Process Control, Weigh-Scale and Load-Cell Digitizer, Multi-Channel Data Acquisition Front End, Audio-Bandwidth Instrumentation, Portable Medical Instrumentation, Legacy 12-bit Upgrade Path in Motor Control.
Precision Industrial Process Control
The CS5012A-BL7Z fits industrial process-control loops because its 12-bit/100 kSPS throughput delivers 5 kHz of input bandwidth per channel, comfortably oversampling 4-20 mA loops and RTD/thermocouple front ends. The on-chip self-calibration routine holds offset and full-scale error to 1/2 LSB without a service technician, satisfying the long-term drift budgets of PLC analog input cards. Designers typically place the converter behind an instrumentation amp (e.g. AD8421) and feed its 5 V supply from a linear LDO rather than a switching rail, because the converter's PSRR cannot fully reject MHz-class switch noise. Result: better than 0.1 percent FS accuracy in a plant-floor DIN-rail module.
推荐
Weigh-Scale and Load-Cell Digitizer
The CS5012A-BL7Z is well-matched to load-cell digitizers because its 7.2 us conversion time and integrated track-and-hold can digitize the slowly varying bridge output at 100 kSPS while averaging down noise to 16-bit effective resolution. Its differential linearity guarantee of 'no missing codes' prevents the histogram gaps that would otherwise produce scale non-linearities in retail and laboratory balances. The 44-PLCC package keeps the analog ground plane compact under the die, simplifying the 4-layer PCB stack that most load-cell modules require for EMI. Combined with a CS5503 or CS5516 sigma-delta companion, it forms a hybrid speed/precision front end.
推荐
Multi-Channel Data Acquisition Front End
The CS5012A-BL7Z is a strong fit for legacy multi-channel 12-bit DAQ front ends where one ADC is multiplexed across 8-16 analog inputs at 100 kSPS aggregate. Its fast on-chip track-and-hold eliminates the external buffer that older successive-approximation parts required, shrinking the BOM by an op-amp and a settling RC. The 3-state parallel bus simplifies interface to legacy 8051/68HC11/DSP hosts, while the BL7Z variant's serial mode lets modern microcontrollers read conversions without dedicating a full port. Designers often pair it with an ADG708 8-to-1 mux and an AD584 precision reference for a complete 12-bit DAQ slice.
推荐
Audio-Bandwidth Instrumentation
The CS5012A-BL7Z's 100 kSPS rate covers the full 20 Hz-20 kHz audio band and beyond, making it suitable for audio-bandwidth test instruments, signal analyzers, and acoustical measurement front ends. Its 12-bit resolution is sufficient for analyzers with 70 dB dynamic range and for sound-level meter front ends after anti-alias filtering. The serial BL7Z interface drops into DSP evaluation boards without glue logic, reducing design time for prototype audio analyzers. Engineers typically drive the input through an audio-bandwidth amp such as the SSM2017 and use an anti-alias filter with fc near 40 kHz before the ADC input pin.
推荐
Portable Medical Instrumentation
The CS5012A-BL7Z fits portable medical instruments such as pulse oximeters, single-channel ECG front ends, and patient monitors where 12-bit resolution at 100 kSPS provides ample dynamic range for biopotential signals after front-end gain. The on-chip self-calibration eliminates per-unit trim during manufacturing, which is a major cost saver in low-volume medical device production. The 44-PLCC package is mechanically robust for through-hole-style lead forming often used in medical carts and bedside monitors. Designers follow IEC 60601-1 isolation requirements by placing an ISO amp (e.g. ADuM3150) on the digital bus side.
推荐
Legacy 12-bit Upgrade Path in Motor Control
The CS5012A-BL7Z is frequently specified in existing motor-control designs for current sensing on inverter phase legs, where 12-bit resolution and 100 kSPS capture 20 kHz PWM current transients adequately for FOC control loops. Engineers keep the BL7Z variant on the BOM because its pin-compatible 14-bit and 16-bit siblings (CS5014/16) allow in-place resolution upgrades without board re-spin when a higher-performance drive variant is needed. Layout practice places the ADC's AGND star-point under pin 1 of the PLCC, isolated from the gate-driver ground return, to preserve the 1/2 LSB linearity under switching noise.
推荐
推荐产品汇总
工程参考数据： CS5012A-BL7Z ——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 | CS5014-BL14Z | CS5016-BL16Z | CS5012A-BL7 |
|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Package | 44-PLCC | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Resolution | 12 bits | 14 bits | 16 bits | 12 bits |
| Conversion Time | 7.2 us | 14.25 us | 16.25 us | 7.2 us |
| Throughput | 100 kSPS | 70 kSPS | 62 kSPS | 100 kSPS |
| Architecture | SAR + self-cal | SAR + self-cal | SAR + self-cal | SAR + self-cal |
| Channels | 1 | 1 | 1 | 1 |
| Interface | Serial/parallel (BL7Z) | Serial/parallel | Serial/parallel | Parallel (legacy packing) |
| Lifecycle | NRND | NRND | NRND | Obsolete (legacy SnPb) |
关键差异点
- Pin-compatible upgrade path to 14-bit and 16-bit （对比 CS5012A-BL7 (legacy SnPb))
- On-chip self-calibration （对比 Generic 12-bit SAR (e.g. ADuC7060 family))
- Integrated track-and-hold （对比 External sample-and-hold requirement of older SARs)
设计说明
Decouple the analog supply pin of the CS5012A-BL7Z with a 10 uF tantalum in parallel with a 0.1 uF ceramic placed within 5 mm of the AVCC pin; route AVCC from a star-point separate from the digital 5 V rail. The on-chip calibration routine assumes a settled supply - allow at least 50 ms after power-up before issuing CAL, or linearity will degrade.
Treat AGND and DGND as separate nets joined at a single point under pin 1 of the PLCC; never run digital return currents under the analog ground pour. Keep the analog input trace short and guarded, and place a 100 ohm series resistor at the analog input pin to damp the on-chip track-and-hold kickback, which is essential to preserve the 1/2 LSB linearity budget above 50 kSPS.
Do not assume the CS5012A-BL7Z is pin-compatible with the CS5101A-BL8Z or CS5102A-BLZ: those parts use a 28-PLCC, not 44-PLCC, and substituting them requires PCB rework. Also note that the BL7Z suffix indicates lead-free packing - do not mix BL7Z and BL7 in the same panel if your line is process-sensitive to lead-free vs SnPb solder profiles.
合规信息
BL7Z suffix denotes lead-free packing per Cirrus Logic part-numbering convention. RoHS and REACH inferred from distributor listings; halogen-free status not published.
