LTC1605ACN - 16-Bit 100ksps ADC with Bipolar ±10V Input | Analog Devices
料号： LTC1605ACN ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $16.5 | $16.50 |
| 10 | $14.85 | $148.50 |
| 100 | $12.95 | $1,295.00 |
| 500 | $11.2 | $5,600.00 |
| 1,000 | $9.8 | $9,800.00 |
LTC1605ACN 概述
An analog-to-digital converter (ADC) is a data-converter integrated circuit that converts a continuous analog voltage into a discrete digital code, occupying a key position in the signal-chain hierarchy: transducer -> analog front end / signal conditioning -> ADC -> digital processor. Successive-approximation register (SAR) ADCs in particular combine a sample-and-hold, precision reference, switched-capacitor DAC and SAR logic to deliver one conversion per clock, with low latency and deterministic behavior well suited to multiplexed data acquisition and industrial instrumentation.
Key features of the LTC1605ACN include ±2.0 LSB (max) INL over temperature, guaranteed 16-bit no missing codes, a microprocessor-compatible 16-bit or two-byte parallel output port, and the ability to be driven by an external reference when higher absolute accuracy is required across temperature. Synchronous sampling and a wide input range let it directly digitize industrial ±10 V signals without external scaling amplifiers.
The device uses a precision bandgap reference and trimmed internal clock, simplifying the analog front end to a simple RC input network plus an external reference option for temperature-stable accuracy. Successive-approximation architecture yields deterministic latency and excellent DC linearity for instrumentation applications.
Typical applications include industrial process control data acquisition boards, multichannel multiplexed data loggers, instrumentation and measurement front ends, and legacy factory automation I/O subsystems. The bipolar ±10 V range lets it connect directly to legacy industrial sensors and 4-20 mA loop resistors.
Design with the device by ensuring the analog input pin sees a low-impedance buffer or RC network matching the ADC's switched-capacitor front end, and by tying REFCOMP to a 10 µF bypass capacitor near the pin to minimize reference noise. Latency is one conversion clock, simplifying timing analysis for sequential multiplexer scans.
直接替换替代料： LTC1605ACN ——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： LTC1605ACN （相同外形与封装尺寸） ——差异在于 Internal Clock, Supply Voltage, Internal Reference, No Missing Codes, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
LTC1605-1CN#PBF
✅ 直接替换✓ 有现货
$24.4 / 个
查看数据手册 →LTC1605-2CN#PBF
✅ 直接替换✓ 有现货
$15.05 / 个
查看数据手册 →LTC1605ACN#PBF
✅ 直接替换📋 参考替代料（不在目录中）
HI3-574AJN-5Z
✅ 直接替换✓ 有现货
$18.75 / 个
查看数据手册 →LTC1605ACN 最大额定值与电气特性
| 分辨率 | 16 bit |
| Sample Rate | 100 ksps |
| Architecture | Successive Approximation (SAR) |
| Number of Channels | 1 |
| Analog Input Range | ±10 V (bipolar) |
| 电源电压 | Single +5 V |
| Power Dissipation | 55 mW (typical) |
| Integral Nonlinearity (INL) | ±2.0 LSB max |
| No Missing Codes | 16 bits (guaranteed) |
| Reference | Internal precision reference; external option supported |
| Output Interface | 16-bit or two-byte parallel (microprocessor compatible) |
| 封装 | 28-PDIP (N) through-hole |
| Number of Terminals | 28 |
| Terminal Form | Through-Hole |
| Package Code | DIP |
| Temperature Grade | Commercial |
| Sample-and-Hold | Integrated |
| Internal Clock | Trimmed internal clock |
LTC1605ACN 引脚配置
| 引脚 1 | VANA — Analog +5V supply |
| 引脚 2 | GND — Analog ground |
| 引脚 3 | REFCOMP — Reference bypass capacitor |
| 引脚 4 | REF — Reference voltage / EXTREF input |
| 引脚 5 | AIN — Analog input |
| 引脚 6 | GND — Analog ground |
| 引脚 7 | VANA — Analog +5V supply |
| 引脚 8 | DB0 — Data bit 0 (LSB, parallel output) |
| 引脚 9 | DB1 — Data bit 1 (parallel output) |
| 引脚 10 | DB2 — Data bit 2 (parallel output) |
| 引脚 11 | DB3 — Data bit 3 (parallel output) |
| 引脚 12 | DB4 — Data bit 4 (parallel output) |
| 引脚 13 | DB5 — Data bit 5 (parallel output) |
| 引脚 14 | DB6 — Data bit 6 (parallel output) |
| 引脚 15 | DB7 — Data bit 7 (parallel output) |
| 引脚 16 | DB8 — Data bit 8 (parallel output) |
| 引脚 17 | DB9 — Data bit 9 (parallel output) |
| 引脚 18 | DB10 — Data bit 10 (parallel output) |
| 引脚 19 | DB11 — Data bit 11 (parallel output) |
| 引脚 20 | DB12 — Data bit 12 (parallel output) |
| 引脚 21 | DB13 — Data bit 13 (parallel output) |
| 引脚 22 | DB14 — Data bit 14 (parallel output) |
| 引脚 23 | DB15 — Data bit 15 (MSB, parallel output) |
| 引脚 24 | BUSY — Busy / conversion-in-progress status output |
| 引脚 25 | CS — Chip select (active low) |
| 引脚 26 | RD — Read strobe (active low) |
| 引脚 27 | CONVST — Conversion start input |
| 引脚 28 | NAP — Nap / power-down mode input |
典型应用
LTC1605ACN 适用于 6 应用s: Industrial Process Control Data Acquisition, Multichannel Data Logger, Medical Patient Monitoring Front End, Audio Test & Measurement Instrumentation, Legacy Factory Automation I/O, Laboratory Instrumentation and Bench DMMs.
Industrial Process Control Data Acquisition
The LTC1605ACN fits industrial process-control data acquisition boards thanks to its ±10 V bipolar input range — matching legacy 4-20 mA loop-resistor voltages without external signal conditioning. Its 100 ksps throughput samples multiplexed analog channels at sub-100 µs per channel, while ±2.0 LSB INL and 16-bit no-missing-codes ensure that process variables (pressure, temperature, flow) are digitized with full industrial accuracy. Single +5 V supply operation at 55 mW simplifies backplane power budgeting and reduces thermal stress in sealed DIN-rail enclosures.
推荐
Multichannel Data Logger
The LTC1605ACN serves as the per-channel ADC in multichannel data loggers, where its 16-bit resolution and 100 ksps capture transient input variations with sub-millisecond resolution. The integrated sample-and-hold and trimmed internal clock eliminate external timing components, while the microprocessor-compatible 16-bit parallel port lets an MCU or FPGA burst-read conversion results at full speed. Bipolar ±10 V input accepts thermocouple, strain-gauge and 4-20 mA shunt signals directly with a simple input RC network, keeping per-channel BOM low in a 16- or 32-channel scanner.
推荐
Medical Patient Monitoring Front End
In medical patient monitoring equipment, the LTC1605ACN digitizes ECG, SpO2 photodiode and temperature signals with 16-bit resolution at up to 100 ksps — sufficient for both 500 Hz ECG waveforms and slower 100 Hz temperature channels. The internal precision reference and low 55 mW dissipation keep battery-powered portable monitors running longer, while the 28-PDIP through-hole package simplifies hand-rework for low-volume clinical and FDA pre-production builds. The bipolar ±10 V input handles sensor bias excursions without saturating on motion artefacts.
推荐
Audio Test & Measurement Instrumentation
Audio test and measurement front ends leverage the LTC1605ACN's 16-bit no-missing-codes linearity to perform distortion and frequency-response sweeps on analog audio gear. Although higher-bit sigma-delta ADCs dominate consumer audio, the 100 ksps SAR architecture and bipolar ±10 V input are ideal for production-line audio analyzers needing deterministic latency and DC accuracy. The single +5 V supply and 28-PDIP package fit well into bench-instrument chassis with through-hole signal conditioning stages and ±10 V analog rails.
推荐
Legacy Factory Automation I/O
The LTC1605ACN is a workhorse ADC in legacy factory automation I/O subsystems, where 28-PDIP through-hole form factor is desired for field-replaceable modules. Its ±10 V input range directly digitizes the ±10 V analog signals coming from valve-position sensors and potentiometric feedback devices, while the 16-bit or two-byte parallel output interfaces to vintage 8086/Z80 microcontrollers without glue logic. Single +5 V operation matches the prevailing backplane supply of legacy PLCs and minimizes retrofit cost.
推荐
Laboratory Instrumentation and Bench DMMs
Bench top digital multimeters and laboratory instrumentation benefit from the LTC1605ACN's ±2.0 LSB INL and 16-bit no-missing-codes performance, which together provide ~0.004 % absolute measurement uncertainty. At 100 ksps the converter supports 4.5-digit DMM DCV and ACV measurement channels while dissipating only 55 mW per channel, allowing dense multi-channel instrument designs. The internal precision reference with external override lets designers easily upgrade to a low-drift precision reference for higher-resolution lab equipment builds.
推荐
推荐产品汇总
工程参考数据： LTC1605ACN ——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 | LTC1605-1CN#PBF | LTC1605-2CN#PBF | LTC1605ACN#PBF | HI3-574AJN-5Z |
|---|---|---|---|---|---|
| Brand | Analog Devices (Linear Tech) | Analog Devices | Analog Devices | Analog Devices | Renesas Electronics |
| Package | 28-PDIP (N) through-hole | 28-PDIP (N) — same | 28-PDIP (N) — same | 28-PDIP (N) — same | 28-PDIP (N) — same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 12 bit |
| Sample Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 25 us conversion (≈40 ksps) |
| Analog Input Range | ±10 V bipolar | 0 V to 4 V unipolar | ±5 V bipolar | ±10 V bipolar | ±10 V bipolar |
| Supply Voltage | Single +5 V | Single +5 V | Single +5 V | Single +5 V | ±12 V or +5 V analog |
| Power Dissipation | 55 mW typical | 55 mW typical | 55 mW typical | 55 mW typical | 150 mW typical |
| INL (max) | ±2.0 LSB | ±2.0 LSB | ±2.0 LSB | ±2.0 LSB | ±1.0 LSB (at 12-bit) |
关键差异点
- Higher resolution (16-bit) versus legacy 12-bit ADCs （对比 HI3-574AJN-5Z)
- Single +5 V supply versus ±12 V dual-supply legacy parts （对比 HI3-574AJN-5Z)
- Full 16-bit internal SAR core with ±10 V bipolar input （对比 LTC1605-1CN#PBF)
设计说明
The LTC1605ACN operates from a single +5 V analog supply (VANA pins 1 and 7). Decouple each VANA pin to ground with a 10 µF tantalum bypass capacitor in parallel with a 0.1 µF ceramic — placed within 5 mm of the package pin. A separate digital +5 V (VD) plane and a ferrite bead between analog and digital supplies prevent digital switching noise from contaminating the analog reference and degrading INL.
Route the AIN trace as a guarded, low-impedance differential pair wrapped with a ground guard trace. The SAR architecture uses a switched-capacitor front end, so any series input resistance longer than ~10 Ω at the AIN pin reduces linearity. Use a wide ground return along the analog-input side of the package and tie AGND and DGND together only at one point near the GND pins.
Always bypass the REFCOMP pin with a 10 µF capacitor; omitting this greatly increases reference noise. When driving AIN with a high-impedance source, buffer it with a low-offset amplifier — otherwise the switched input capacitance introduces settling error. Finally, do not clock CS and RD simultaneously without observing the BUSY signal, or the read cycle may collide with an in-progress conversion.
合规信息
Compliance information not present in the verified web data; consult the manufacturer datasheet for RoHS/REACH status. The LTC1605ACN is a commercial-grade product (0 °C to 70 °C), not AEC-Q100 qualified. Look for the LTC1605ACN#PBF suffix variant if lead-free compliance is required.
