ADS1213E - 22-Bit 4-Channel Delta-Sigma ADC | Texas Instruments
MPN: ADS1213E ✓ AktifADS1213E Ringkasan
A delta-sigma ADC is a type of analog-to-digital converter that uses continuous-time oversampling, digital filtering, and quantization to produce a high-resolution digital result. The ADS1213 belongs to the broader ADC and data-converter hierarchy, where its differential inputs, programmable gain, selectable data rates, and serial interface make it suitable for precision analog measurement systems. The four-channel input multiplexer allows related sensor signals to be measured sequentially rather than requiring a separate converter for every channel.
Key features include 22-bit conversion resolution, four analog inputs, differential input support, a programmable-gain amplifier, and a 6.25 kSPS maximum data rate. Effective resolution is application-dependent because the reported values of 20 bits at 10 Hz and 16 bits at 1,000 Hz reflect the interaction among conversion speed, filtering, noise, and signal bandwidth. The integrated reference and programmable gain reduce the number of external precision components required in many measurement designs.
The serial interface is SPI compatible and also supports a two-wire control mode described by Texas Instruments. Two-wire operation can simplify connections to low-cost isolation components, while SPI compatibility supports a broader range of digital controllers. Configuration registers allow the system to select data rate, gain, channel, and operating modes, although the complete register sequence should be implemented according to the manufacturer datasheet.
Typical measurement uses include bridge-based sensing, industrial process instrumentation, low-level analog signal acquisition, and multichannel sensor monitoring. The combination of differential inputs and programmable gain is particularly useful when a sensor produces a small differential signal around a common-mode voltage. Four channels also support multiplexed sensing, although the complete settling time and acquisition sequence must be allowed before each converted result is used.
Design consideration: the conversion data rate must be selected together with the digital filter, input impedance, gain setting, and reference configuration. Differential input routing, guarding around sensitive analog pins, and a low-noise reference and supply arrangement are more important than simply maximizing the nominal 22-bit converter resolution.
This page consolidates the verified manufacturer and distributor information for ADS1213E, distinguishes its documented conversion performance from application-dependent effective resolution, and identifies the design information still required to finalize a complete analog front end.
Pilihan pengganti yang segera untuk ADS1213E — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Varietas dalam siri ini
Model serupa yang kompatibel dengan pengganti yang segera ADS1213E (sama faktor bentuk dan kaki) — berbeza dalam Effective Resolution at 10 Hz, Programmable Gain Amplifier, Resolution.
ADS1213P
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Lihat Datasheet →ADS1213E Penilaian maksimum & Ciri-ciri Elektrik
| Converter Type | Delta-sigma ADC |
| Pemecahkatan | 22 bit |
| Effective Resolution at 10 Hz | 20 bit |
| Effective Resolution at 1000 Hz | 16 bit |
| Maximum Data Rate | 6.25 kSPS |
| Analog Input Channels | 4 channels |
| Input Architecture | Differential inputs |
| Programmable Gain Amplifier | Programmable |
| Integrated Voltage Reference | Yes |
| Power Consumption | 1.4 mW |
| Serial Interface | SPI compatible; two-wire control mode |
| Missing Codes | No missing codes |
| Kemasan | 28-pin SSOP |
| Jenis Pemasangan | Surface mount |
| RoHS Compliance | unknown |
| REACH Compliance | unknown |
| AEC-Q100 Qualification | unknown |
Panduan Konfigurasi Pin ADS1213E 28-pin ssop
Konfigurasi pin untuk ADS1213E (28-pin ssop pakai). Komponen analog ini mempunyai pin masukan, keluaran, dan kuasa. Rujuk dokumen pengeluar untuk konfigurasi pengecualian, pemulihan, dan pin aktifkan. Ideal untuk pengawasan isyarat dan litar pengukur.
Tiada data garisan pin yang diperoleh untuk ADS1213E.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
ADS1213E patut untuk 6 aplikasis: Low-Level Bridge Sensor Measurement, Industrial Process Monitoring, Multichannel Sensor Acquisition, Precision Analog Instrumentation, Battery-Powered Sensor Node, Isolated Measurement Interface.
Low-Level Bridge Sensor Measurement
The ADS1213E is appropriate for low-level bridge and differential sensor measurements where accuracy matters more than high-speed waveform capture. Its differential inputs avoid direct measurement of the large common-mode voltage, while the programmable-gain amplifier can increase the converter’s sensitivity to the sensor’s differential output. The 22-bit nominal resolution and 20-bit effective resolution at 10 Hz support precise low-rate readings. Place the converter close to the sensor and analog front end, provide stable excitation, and configure the digital filter for the required response. The 6.25 kSPS maximum rate should not be used without evaluating the corresponding reduction in effective resolution and the time required for channel settling.
Industrial Process Monitoring
The four-channel multiplexer makes the ADS1213E useful for industrial process monitoring when multiple slowly varying analog values must be brought into one digital controller. Examples can include pressure, temperature, level, and current-derived process signals, provided each signal remains within the converter’s verified input range. The SPI-compatible serial interface supports connection to a digital controller, while the internal voltage reference simplifies many low-cost measurement systems. A practical implementation should minimize trace length around sensitive analog inputs, select gains without saturating the selected range, and account for the settling time after each multiplexer transition. The converter should be synchronized with the sensor network rather than sampled as fast as its maximum rate.
Multichannel Sensor Acquisition
For multichannel sensor acquisition, the ADS1213E provides four multiplexed inputs, differential measurement capability, programmable gain, and a maximum conversion rate of 6.25 kSPS. This combination supports compact systems that monitor several related transducers without allocating a separate high-resolution ADC to each channel. Differential pairing can reject common-mode disturbances when the sensors and routing allow it, while programmable gain improves use of the converter’s conversion range. The sequencing strategy should ensure that every channel receives enough acquisition time for its source impedance and filter network. For slow-changing sensors, selecting a lower output-data rate can preserve the documented advantage of 20-bit effective resolution at 10 Hz compared with 16 bits at 1,000 Hz.
Precision Analog Instrumentation
The ADS1213E fits precision instrumentation that must digitize small analog signals while limiting converter count and board area. Its 22-bit delta-sigma architecture, integrated reference, programmable-gain amplifier, and four-channel multiplexing support compact measurement front ends. The device is especially relevant when the desired bandwidth is modest and the measurement benefits from noise filtering and resolution rather than rapid conversions. Designers should budget for reference accuracy, analog supply quality, input filtering, and gain-induced noise as separate error contributors. Also verify that the internal reference meets the required stability and drift conditions; otherwise, the benefit of an integrated reference must be weighed against external-reference requirements.
Battery-Powered Sensor Node
The ADS1213E can be evaluated for battery-powered sensor nodes because its verified low-power figure is 1.4 mW and its digital filtering supports reduced-rate measurements. Low-rate operation is particularly valuable for sensors whose useful information changes slowly, allowing the system to spend less time converting without losing the higher effective resolution associated with the 10 Hz operating point. The complete power budget must include analog and digital supply currents, interface activity, sensor excitation, leakage, and the time required to wake and process each sample. Because the exact supply ranges and operating current are not present in the supplied excerpts, the designer must verify them in the manufacturer datasheet before calculating battery life.
Isolated Measurement Interface
The ADS1213E’s SPI-compatible synchronous interface and documented two-wire control mode make it relevant to isolated measurement systems. Texas Instruments specifically notes that the two-wire mode can suit low-cost isolation arrangements. A digital isolator can carry commands and conversion results across a barrier while the analog converter remains on the isolated sensor side. The design must still verify the selected interface mode, timing, isolation direction requirements, creepage, and isolation ratings; the interface capability alone does not establish compliance with a particular safety standard. For slow sensor signals, the 10 Hz operating point provides 20-bit effective resolution according to the manufacturer information and can be paired with an appropriately narrow digital filter.
Data referensi kejuruteraan untuk ADS1213E — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | ADS1213P |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 28-pin SSOP | 28-pin SSOP - verify exact package suffix |
| Converter Type | Delta-sigma ADC | Delta-sigma ADC |
| Nominal Resolution | 22 bit | 22 bit |
| Effective Resolution at 10 Hz | 20 bit | 20 bit |
| Effective Resolution at 1000 Hz | 16 bit | 16 bit |
| Maximum Data Rate | 6.25 kSPS | 6.25 kSPS |
| Analog Input Channels | 4 channels | 4 channels |
| Power Consumption | 1.4 mW | 1.4 mW |
| Integrated Voltage Reference | Yes | Yes |
| Programmable Gain Amplifier | Programmable | Programmable |
| Serial Interface | SPI compatible with two-wire control mode | SPI compatible with two-wire control mode |
Penyeberangsung Jelas
- High nominal resolution with selectable effective performance (vsADS1213P)
- Four-channel multiplexing in one converter (vsADS1213P)
- Low reported converter power consumption (vsADS1213P)
- Flexible digital control options (vsADS1213P)
Catatan Desain
Treat the analog input network as part of the measurement precision rather than as a simple connection to the converter. Keep differential input traces short, closely matched, and isolated from switching or high-current paths. Select input filtering and gain according to the source impedance and required bandwidth. The verified 20-bit effective resolution at 10 Hz and 16-bit effective resolution at 1,000 Hz show that bandwidth and conversion-rate choices materially change usable performance. Allow the complete acquisition and settling interval after each multiplexer selection before accepting a conversion result.
Place reference-decoupling, analog-supply, and input-filter components close to their associated ADS1213E pins. Route the two differential inputs as a compact pair and keep them away from serial-interface switching and exposed connector circuitry. If the analog input source is remote, account for input bias current, leakage, settling time, and possible ESD protection capacitance in the filter design. The verified excerpts do not provide the recommended external capacitor values or input-impedance curves, so these must be taken directly from the manufacturer datasheet rather than assumed from generic ADC practice.
Do not select the 6.25 kSPS maximum conversion rate merely because it is available. The documented effective-resolution figures are rate-dependent, and the application may require a slower output-data rate, a narrower digital filter, or additional averaging to reach its noise target. Likewise, verify VBIAS configuration: Texas Instruments support information states that VBIAS defaults to OFF at power-up. A design that expects bias current output without configuring it may behave differently from the intended application circuit.
Calculate the converter, digital interface, reference, sensor, and support-circuit loads separately instead of using the listed 1.4 mW figure as the complete system consumption. The verified value represents the ADS1213E power figure, not necessarily the energy required to excite a bridge, operate isolation hardware, or keep a controller active between conversions. Because the supplied excerpts omit the detailed supply-current and supply-voltage tables, obtain those limits from the manufacturer datasheet before establishing battery life or confirming that a proposed 1.8 V or 3.3 V system has adequate headroom.
Maklumat Kesediaan
The supplied verified excerpts do not explicitly state compliance or qualification declarations for ADS1213E. Compliance must be confirmed for the exact orderable MPN and manufacturing source using current manufacturer documentation.