ADS8345E - 16-Bit 100-kSPS 8-Channel SAR ADC | Texas Instruments
MPN： ADS8345E ✓ 啟用中ADS8345E 概覽
An ADC is an analog-to-digital converter, a semiconductor that samples continuous analog voltage and produces a corresponding digital code. The ADS8345 belongs to the SAR ADC family, where an internal sample-and-hold circuit and successive approximation register create a conversion result using successive comparisons. Its multiplexer, converter, and serial interface place eight-channel digitization in one compact analog-to-digital converter package.
Key features include 16-bit resolution, a maximum throughput rate of 100 kSPS, 85 dB SINAD, bipolar input capability, and single-supply operation. The reference voltage can vary from 500 mV to VCC divided by two, producing a corresponding bipolar input range of plus or minus VREF. A shutdown mode reduces power dissipation when conversion activity is not required.
The internal multiplexer can configure the analog inputs as eight single-ended channels or four differential channels. This flexibility makes the converter useful for systems that need several measurement channels but require synchronized sampling through a common serial interface. The synchronous serial interface also supports low-cost isolation when the digital communication path must be separated from the analog measurement circuitry.
Typical applications include battery-operated personal digital assistants, portable multichannel data loggers, measurement equipment, industrial process monitoring, laboratory instrumentation, and isolated remote data-acquisition systems. The 100-kSPS throughput supports moderate-speed acquisition, while the 16-bit resolution preserves fine amplitude distinctions in sensor and control signals.
Design the analog front end around the selected input range, reference voltage, and full-scale calibration. Place input and reference components close to the converter, provide appropriate bypass capacitance, and route serial signals away from sensitive analog inputs. Account for supply noise, grounding, settling time, and the distinction between single-ended and differential input configurations.
This page consolidates the verified manufacturer and distributor information for the ADS8345E, including exact pricing, pin-compatible family alternatives, application guidance, and design considerations. It also identifies unsupported package variants and uncertain lifecycle, compliance, and detailed pin-mapping data rather than presenting guesses as verified specifications.
直接替換替代品，適用於 ADS8345E — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADS8345E （相同外形與佔位） — 差異在於 SINAD.
ADS7844N
✅ 直接替換聯絡詢價
查看資料表 →ADS8344N
✅ 直接替換聯絡詢價
查看資料表 →ADS8341E
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADS8342E
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADS8343EB/2K5
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADS8345E 最大額定值與電氣特性
| ADC Type | Successive-approximation-register (SAR) ADC |
| 解析度 | 16 bit |
| Maximum Sampling Rate | 100 kSPS |
| Single-Ended Input Channels | 8 channels |
| Differential Input Channels | 4 channels |
| Input Type | Fully differential and single-ended inputs |
| Input Range | Bipolar, plus or minus VREF |
| SINAD | 85 dB |
| Supply Type | Single supply, +5 V typical operating condition |
| Reference Voltage Range | 500 mV to VCC/2 |
| Typical Power Dissipation | 8 mW at 100 kSPS and +5 V supply |
| Digital Interface | Synchronous serial interface |
| 工作溫度範圍 | -40 °C to +85 °C |
| Package Options | 20-pin QSOP and 20-pin SSOP |
| Target Package | 20-pin SSOP |
| Shutdown Mode | Yes |
| Isolation Support | Synchronous serial interface supports low-cost remote data-acquisition isolation |
ADS8345E 20-pin ssop 腳位配置指南
ADS8345E（20-pin ssop 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： ADS8345E.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADS8345E 適用於 6 應用s: Portable Multichannel Data Logger, Industrial Process Monitoring, Laboratory Measurement Equipment, Isolated Remote Data Acquisition, Battery-Powered Sensor Interface, Multi-Sensor Environmental Monitoring.
Portable Multichannel Data Logger
The ADS8345E is well suited to portable data logging because its 16-bit resolution preserves small changes in sensor outputs while the eight-channel single-ended input configuration supports several measurements per scan. According to Texas Instruments, the converter is intended for battery-operated personal digital assistants and portable multichannel data loggers, with typical power dissipation of 8 mW at 100 kSPS and a +5 V supply. Its shutdown mode can reduce consumption between acquisition bursts. A practical implementation can cycle the converter, buffer acquired codes, and transmit them over the synchronous serial interface, although battery life still depends on sensor conditioning, reference overhead, and interface activity.
推薦
Industrial Process Monitoring
The ADS8345E supports industrial process monitoring where multiple analog inputs must be converted at consistent 16-bit resolution. Eight single-ended inputs or four differential inputs can be multiplexed through the internal converter, while the 100-kSPS throughput accommodates many pressure, temperature, level, and current-signal channels. The 85 dB SINAD specification provides a defined conversion-performance figure for design verification. Differential wiring can reduce common-mode disturbance when appropriate, but the selected 500 mV-to-VCC/2 reference range, analog front end, isolation requirements, and grounding strategy remain central to achieving useful process accuracy.
推薦
Laboratory Measurement Equipment
The ADS8345E fits laboratory measurement equipment that needs accurate multichannel digitisation at a moderate sampling rate. Its 16-bit resolution, 85 dB SINAD, and selectable eight-single-ended or four-differential input configuration support signal capture from sensors, transducers, and test fixtures. The manufacturer identifies measurement equipment as a typical application and specifies operation from -40 °C to +85 °C. Designers should use a stable low-noise reference, provide supply bypassing, calibrate full scale, and account for source impedance and acquisition settling time so the measured 100-kSPS throughput represents valid conversion results.
推薦
Isolated Remote Data Acquisition
The ADS8345E is suitable for remote data-acquisition links because its synchronous serial interface supports low-cost isolation, as stated in the Texas Instruments manufacturer material. The converter can place eight single-ended or four differential sensor inputs behind a controlled digital interface, allowing the analog section to remain near the sensed signals while data travels across an isolation boundary. The 100-kSPS rate and 16-bit resolution support moderate-speed measurements, while the 85 dB SINAD specification supports quality verification. Isolation components, isolation power, grounding, and cable protection must be designed separately; the ADC does not itself provide a complete galvanic isolation barrier.
推薦
Battery-Powered Sensor Interface
The ADS8345E can serve as the sensing front end in a battery-powered instrument because it combines 16-bit conversion, 100-kSPS throughput, and relatively low stated operating dissipation. Texas Instruments specifies typical power dissipation as 8 mW at 100-kSPS operation with a +5 V supply and includes a shutdown mode for inactive periods. That makes the converter appropriate for periodic logging from portable sensors where resolution must be balanced against energy use. The actual system benefit depends on analog reference efficiency, signal-conditioning current, serial-interface activity, and the selected battery voltage, so shutdown sequencing and measurement intervals should be included in the complete power budget.
推薦
Multi-Sensor Environmental Monitoring
The ADS8345E is appropriate for environmental monitoring systems that combine several slowly changing or moderate-speed sensor outputs. Eight single-ended inputs can represent temperature, humidity, light, pressure, or status signals, while four differential channels can serve sensors with active differential outputs. The 16-bit resolution provides more code density than a 12-bit converter, and the 100-kSPS throughput allows sequential scanning of multiple channels. The reference can be set from 500 mV to VCC/2, allowing the analog range to be matched to sensor amplitudes. Designers should still verify settling requirements, sensor noise, common-mode voltage, calibration stability, and channel-to-channel acquisition timing.
推薦
推薦產品摘要
工程參考資料，適用於 ADS8345E — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADS7844N | ADS8344N | ADS8341E | ADS8342E | ADS8343E |
|---|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Single-Ended Input Channels | 8 channels | 4 channels | 4 channels | 1 channel | 2 channels | 3 channels |
| Digital Interface | Synchronous serial interface | Synchronous serial interface | Synchronous serial interface | Synchronous serial interface | Synchronous serial interface | Synchronous serial interface |
主要差異化特點
- Higher single-ended channel count (對比ADS8344N)
- Higher conversion resolution than ADS7844 (對比ADS7844N)
- Lower channel count than ADS8345E (對比ADS8341E)
- Matched 100-kSPS family performance (對比ADS8343E)
設計說明
Place the reference, supply-bypass, and analog-input components close to their associated ADS8345E pins, and route the eight analog inputs away from the synchronous serial clock and data traces. Because the converter supports bipolar inputs defined by VREF, keep the reference path short and quiet. If differential channels are used, route each positive and negative pair together with consistent geometry to minimize conversion-dependent pickup.
Budget the converter from the verified 8 mW typical dissipation at 100 kSPS with a +5 V supply, then add reference, interface, and analog-conditioning consumption separately. Use the shutdown mode during long idle intervals in battery-powered systems. Do not assume that the converter's shutdown state removes power from external reference or interface circuits; those blocks must be controlled independently if standby energy is important.
Do not treat a same-package part as automatically equivalent merely because its pins align. The verified data confirms pin compatibility with ADS7844 and ADS8344, but the alternative family includes different resolution and channel-count configurations. Before replacing ADS8345E, verify the number of single-ended or differential inputs, reference range, acquisition timing, serial mode, software register behavior, and analog input mapping against the original design.
Keep clock and serial-data traces short, route them over a continuous reference plane, and avoid passing them beneath sensitive analog inputs. The synchronous serial interface simplifies timing, but deterministic transfer does not remove analog errors. Provide local supply bypassing and a stable reference, observe the datasheet's acquisition timing, and validate full-scale accuracy and noise in the final board configuration.
合規資訊
The supplied verified search results did not provide device-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. No compliance status has been assumed. AEC-Q100 is not applicable because this is an analog-to-digital converter rather than an automotive-qualified device.
