ADS7810UB/1K - 12-Bit 800kHz SAR ADC, ±10V Input | Texas Instruments
MPN: ADS7810UB/1K ✓ Hoạt độngADS7810UB/1K Tóm tắt
A SAR ADC is a converter that resolves the digital output one bit at a time by comparing the sampled-and-held analog input against a precision DAC driven by a successive-approximation register. SAR converters sit within the broader ADC taxonomy of successive-approximation ADC -> data converter -> mixed-signal IC -> semiconductor, and are valued for deterministic latency, low latency, and excellent DC accuracy versus pipeline or sigma-delta architectures that trade latency for higher speed or resolution.
Key specifications include 1.25 µs typical throughput time, 69 dB minimum SINAD at 250 kHz input, ±0.75 LSB maximum integral nonlinearity (INL), ±1 LSB maximum differential nonlinearity (DNL), and a parallel data interface with read latches. The internal reference eliminates reference-bias resistor networks and simplifies board layout, while the bipolar ±10 V range allows direct connection to industrial transducer outputs and signal-conditioning stages.
This part is built on a low-power CMOS process and supports a 2's-complement binary output format, simplifying software post-processing on microcontrollers or FPGAs that already expect signed data. The integrated design typically operates from a single +5 V supply, with logic-compatible parallel outputs that interface to 74HC or modern MCUs.
Typical applications include industrial process control data acquisition, multi-channel multiplexed instrumentation systems, automated test equipment, and motor control feedback loops that demand deterministic conversion latency. Designers select the ADS7810UB/1K when the input swing is already at ±10 V and system noise bandwidth is well below Nyquist.
When designing with this ADC, allocate adequate settling time on the input amplifier and ensure the reference decoupling follows the datasheet recommended capacitor network. The parallel interface simplifies layout but consumes more board traces than an SPI-based ADC, so plan FPGA/MCU pin allocation early.
This page synthesizes distributor pricing, drop-in alternative listings, and PCB design notes not found in the manufacturer datasheet alone, providing an at-a-glance comparison view for engineers selecting a 12-bit, 800 kHz SAR ADC for industrial acquisition.
Bộ thay thế dễ dàng lắp đặt cho ADS7810UB/1K — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADS7810UB/1K (cùng hình factor và footprint) — khác nhau ở Package, Data Interface, Operating Temperature, Sampling Rate, Reference.
ADS7810U/1KG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7810UB/1KE4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS7810UB
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7808UB/1K
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7807PBG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7806UG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7800KPG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7813UB/1K
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7810UB/1K Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Architecture | SAR (Successive Approximation Register) |
| Tỷ lệ lấy mẫu | 800 kHz |
| Throughput Time | 1.25 µs (typical) |
| Phạm vi điện áp đầu vào | ±10 V (standard) |
| Number of Input Channels | 1 (single-ended) |
| INL (Max) | ±0.75 LSB |
| DNL (Max) | ±1 LSB |
| SINAD (Min, 250 kHz input) | 69 dB |
| Internal Reference | Yes (integrated) |
| Sample-and-Hold | Yes (integrated) |
| Data Interface | Parallel, with read latches |
| Output Format | 2's-complement binary |
| Hộp | 28-pin SOIC |
| Nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Kiểu lắp đặt | Surface Mount (Gull Wing) |
| Trạng thái RoHS | Compliant |
Cấu hình chân ADS7810UB/1K
| Chân 1 | VREF — Reference voltage (internal reference output/decoupling) |
| Chân 2 | AGND — Analog ground |
| Chân 3 | IN — Analog input (±10 V range) |
| Chân 4 | RANGE — Input range select (per datasheet) |
| Chân 5 | CONVST — Conversion start signal |
| Chân 6 | CS — Chip select (active low) |
| Chân 7 | RD — Read signal (active low) |
| Chân 8 | BUSY — ADC busy / end-of-conversion status |
| Chân 9 | DGND — Digital ground |
| Chân 10 | DB11 — Data bit 11 (MSB) |
| Chân 11 | DB10 — Data bit 10 |
| Chân 12 | DB9 — Data bit 9 |
| Chân 13 | DB8 — Data bit 8 |
| Chân 14 | DB7 — Data bit 7 |
| Chân 15 | DB6 — Data bit 6 |
| Chân 16 | DB5 — Data bit 5 |
| Chân 17 | DB4 — Data bit 4 |
| Chân 18 | DB3 — Data bit 3 |
| Chân 19 | DB2 — Data bit 2 |
| Chân 20 | DB1 — Data bit 1 |
| Chân 21 | DB0 — Data bit 0 (LSB) |
| Chân 22 | TAG — Tag input (per datasheet) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | NC — Not connected (per datasheet) |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | VCC — +5 V supply |
| Chân 27 | VD+ — Positive supply for analog input stage |
| Chân 28 | VD- — Negative supply for analog input stage |
Ứng dụng tiêu biểu
ADS7810UB/1K phù hợp cho 7 Áp dụngs: Industrial Process Control Data Acquisition, Automated Test Equipment (ATE) Measurement Systems, Motor Control Current and Voltage Feedback, Multiplexed Multi-Channel Instrumentation Front-End, Legacy Parallel-Bus Data Acquisition Cards, Industrial Transducer Signal Conditioning, Audio Bandwidth Signal Analysis.
Industrial Process Control Data Acquisition
The ADS7810UB/1K is well matched to industrial process control PLC analog input modules, where its ±10 V bipolar input range directly accepts 4-20 mA loop resistor scaling and ±10 V transducer outputs. With 12-bit resolution, 69 dB minimum SINAD, and 800 kHz throughput, it supports up to ~0.024% FS accuracy - sufficient for closed-loop process control and SCADA signal conditioning. The integrated sample-and-hold and internal reference simplify the analog front-end, reducing BOM and PCB area. The -40 °C to +85 °C industrial temperature grade covers unheated cabinet environments, while the 28-pin SOIC package supports standard SMT assembly lines. Pair with an ADS7805PG4 companion for redundant measurement channels.
Được đề xuất
Automated Test Equipment (ATE) Measurement Systems
The ADS7810UB/1K's 800 kHz sampling rate and deterministic SAR latency make it suitable for medium-speed ATE measurement systems, including benchtop instrumentation and production-line testers. Each conversion completes in 1.25 µs with no pipeline delay, simplifying stimulus-response synchronization in software. The 69 dB SINAD at 250 kHz input supports measurement of audio-bandwidth analog signals with ~0.1% accuracy, while the parallel interface directly drives FPGA capture buffers without DMA overhead. The internal reference eliminates reference-board calibration and reduces warm-up drift. The integrated architecture shortens ATE firmware development versus discrete ADC + reference designs.
Được đề xuất
Motor Control Current and Voltage Feedback
The ADS7810UB/1K fits motor control feedback loops that demand deterministic conversion latency, such as BLDC and servo drive current sensing via shunt resistors. Its 1.25 µs conversion time aligns with PWM frequencies up to 100 kHz, enabling sample-on-demand synchronization with the PWM edge. The ±10 V input range accepts amplified shunt signals without external level shifters, and 12-bit resolution supports 0.024% FS precision - adequate for torque-loop control in industrial drives. The parallel data bus with read latches interfaces directly to motor-control FPGAs, minimizing interrupt latency. Industrial temperature rating and integrated S&H simplify the safety-isolated analog front-end.
Được đề xuất
Multiplexed Multi-Channel Instrumentation Front-End
The ADS7810UB/1K can be paired with an external analog multiplexer to build high-channel-count instrumentation front-ends for data loggers and medical monitoring equipment. With 800 kHz throughput, a single ADC can sequentially sample 8-16 multiplexed channels at 50-100 kHz per channel - sufficient for vibration, temperature, and pressure logging. The integrated reference and S&H maintain accuracy across the multiplexed input, while the parallel interface feeds FIFO buffers that decouple ADC timing from the host processor. The ±10 V input accepts sensor bridge outputs directly, reducing analog front-end complexity.
Được đề xuất
Legacy Parallel-Bus Data Acquisition Cards
The ADS7810UB/1K targets retrofit and legacy PCI/ISA data acquisition cards where 12-bit resolution and parallel data output match the original hardware architecture. Many industrial PCs and PLCs use parallel ADC interfaces for low-latency register reads, and the ADS7810UB/1K drops directly into such designs without firmware changes. Its 800 kHz sampling supports waveforms up to ~400 kHz bandwidth per Nyquist, covering audio and vibration analysis. The 28-pin SOIC footprint is footprint-compatible with older TI ADS7810 and ADS7807 board layouts, simplifying spare-part qualification.
Được đề xuất
Industrial Transducer Signal Conditioning
The ADS7810UB/1K digitizes industrial transducer outputs - strain gauges, load cells, pressure sensors, and thermocouple amplifiers - directly with ±10 V input range and 12-bit resolution. The internal reference and S&H provide the precision front-end needed for 0.024% FS bridge measurements, while the parallel output drives HMI display controllers without buffering. Industrial temperature rating covers factory-floor installation. The integrated architecture reduces BOM by eliminating an external reference IC, op-amp S&H, and clock source, simplifying IEC 61508 functional-safety certification paths.
Được đề xuất
Audio Bandwidth Signal Analysis
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS7810UB/1K — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ADS7810U/1KG4 | ADS7810UB/1KE4 | ADS7810UB | ADS7808UB/1K | ADS7807PBG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC | 28-pin SOIC |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 16 bits |
| Input Voltage Range | ±10 V | ±10 V | ±10 V | ±10 V | ±10 V | ±10 V |
| Data Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Internal Reference | Yes | Yes | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Highest sampling rate in the 28-SOIC, 12-bit TI SAR ADC portfolio (vsADS7808UB/1K)
- True bipolar ±10 V input range without external level shifters (vsADS7807PBG4)
- Parallel data interface with read latches for low-latency FPGA capture (vsADS7813UB/1K)
Ghi chú thiết kế
Place the analog input filter capacitor and reference decoupling capacitor as close as possible to the ADS7810UB/1K pins. Use a ground plane that splits between AGND (pin 2) and DGND (pin 9) joined at a single point near the IC. Keep digital parallel output traces short and routed away from the analog input pin (pin 3) to minimize digital-to-analog crosstalk on the order of tens of millivolts.
Drive the analog input with a low-impedance op-amp buffer capable of settling to 12-bit accuracy within 1 µs. The SAR architecture requires the input signal to settle within the acquisition window; insufficient bandwidth or slew-rate on the input amplifier will degrade SINAD. According to TI's ADS7810 datasheet, the input S&H acquires in ~200 ns, so choose an op-amp with at least 5 MHz GBP and 10 V/µs slew rate for ±10 V input swings.
Decouple VCC (pin 26), VD+ (pin 27), and VD- (pin 28) with separate 10 µF tantalum and 0.1 µF ceramic capacitors placed within 5 mm of each supply pin. The ADS7810UB/1K draws analog and digital supply currents simultaneously during conversion, and inadequate decoupling will inject noise into the reference and degrade DNL performance by 1-2 counts. Place a ferrite bead between VD+ and VCC if power-rail noise from upstream switching regulators is present.
Do not leave the CONVST (pin 5) input floating - the ADS7810UB/1K may free-run or enter an indeterminate state. Tie CONVST to the system conversion timing logic or a controlled logic low during reset. Similarly, the RANGE (pin 4) and TAG (pin 22) inputs must be tied to a defined logic level (VCC or DGND) per the datasheet configuration table to set the input range and tag-bit polarity. Floating control pins is the most common ADS7810UB/1K bring-up failure.
Thông tin tuân thủ
RoHS compliant per TI product page. Industrial temperature grade (-40 °C to +85 °C). Not AEC-Q100 qualified - select a Q1-graded SAR ADC for automotive. Halogen-free status not specified in provided data.