ADS820U - 10-Bit 20-MSPS Pipelined ADC | Texas Instruments
MPN: ADS820U ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ADS820U Overview
An ADC is a data-conversion IC that samples an analog voltage and converts it into a digital code for processing by a microcontroller, DSP, FPGA, or other digital system. The ADS820U belongs to the pipelined ADC class, which uses multiple internal stages to provide a practical conversion rate for communications, instrumentation, industrial control, and embedded measurement systems. Its 10-bit resolution represents 1,024 possible output codes, while the 20-MSPS sampling rate supports acquisition of rapidly changing analog signals.
Key verified features include 10-bit resolution, 20 MSPS throughput, one analog input, one pipelined conversion channel, 28-SOIC packaging, operation from a single +5 V supply, and configurable differential or single-ended input signals. The verified search data also reports no missing codes, an internal reference, 195 mW low power, 60 dB SNR, 65 MHz wideband track-and-hold bandwidth, and 0.2 LSB differential linearity error. These figures come from the provided ADS820U search results and should be checked against the current manufacturer datasheet before design release.
The monolithic converter uses a small-geometry CMOS process according to the TI product page. The internal track-and-hold captures the analog input before quantization, while the pipelined architecture supports throughput-oriented sampling. Configuration flexibility allows the same device family to accept either differential or single-ended input signals, which can simplify front-end design when common-mode rejection or single-ended source compatibility is required. The internal reference reduces the need for an external reference circuit in suitable applications.
Typical uses include communications interfaces, industrial measurement, control loops, data-acquisition modules, embedded instrumentation, and embedded systems requiring parallel digital conversion. A 10-bit ADC is appropriate where the required system resolution does not justify the complexity and power of a higher-resolution converter. The 28-SOIC package is also useful for prototypes, legacy designs, and boards that already use through-hole or leaded analog interfaces.
The main design consideration is ensuring that the analog input, reference, supply decoupling, digital output timing, and acquisition clock satisfy the converter requirements. Use the manufacturer datasheet for the exact pinout, input range, timing, output coding, reference accuracy, and recommended application circuit. Do not infer those missing values from the distributor summaries. This page combines verified source data with engineering guidance and explicitly identifies parameters that require confirmation.
This product summary synthesizes verified TI, DigiKey, Mouser, and Octopart information with practical design context. It is intended to support initial component selection while preserving traceability to the supplied source links and avoiding unsupported pricing, lifecycle, and pin-level claims.
Drop-in alternatives for ADS820U — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADS820
✅ Drop-In📋 Reference alternative (not in catalog)
ADS820U/1K
✅ Drop-In📋 Reference alternative (not in catalog)
ADS820U Maximum Ratings & Electrical Characteristics
| Resolution | 10 bit |
| Sampling Rate | 20 MSPS |
| Input Type | 1 input, differential or single-ended |
| Architecture | Pipelined ADC |
| Supply Voltage | +5 V single supply |
| Internal Reference | Included |
| Track-and-Hold | Internal track-and-hold |
| Power-Down Feature | Included |
| Low Power | 195 mW |
| Signal-to-Noise Ratio | 60 dB |
| Differential Linearity Error | 0.2 LSB |
| Track-and-Hold Bandwidth | 65 MHz |
| Package | 28-pin SOIC |
| Process Technology | Small-geometry CMOS |
| No Missing Codes | Verified in supplied search data |
| Operating Temperature | -40°C to +85°C |
ADS820U 28-pin soic Pin Configuration Guide
Pin configuration for ADS820U (28-pin soic package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for ADS820U.
Refer to the datasheet for full pin configuration.
Typical Applications
ADS820U is suitable for 6 applications: Communications Signal Acquisition, Industrial Control and Monitoring, Embedded Data Acquisition, Instrumentation and Test Equipment, Power and Motion Feedback Systems, Educational and Prototype Electronics.
Communications Signal Acquisition
The ADS820U is suitable for communications-related signal acquisition when a system needs 10-bit resolution and throughput up to 20 MSPS. It can digitize a conditioned intermediate-frequency, baseband, or control signal for a digital signal processor, FPGA, or microcontroller. The verified internal reference, track-and-hold, and single +5 V operation simplify the converter block. The principal design checks are input bandwidth, clock timing, output coding, and the exact pin-level interface from the TI datasheet.
Recommended
Industrial Control and Monitoring
The ADS820U can serve as the ADC in an industrial control module that converts analog sensor or actuator feedback into digital data. A 10-bit result provides 1,024 nominal codes, while 20 MSPS supports fast sampling when the control loop or monitoring system requires it. Place the converter after suitable signal conditioning and isolation or protection as required by the system. Verify the input range and timing because those values are not fully provided in the verified snippets.
Recommended
Embedded Data Acquisition
ADS820U is appropriate for compact embedded data-acquisition systems that require a parallel-output ADC with moderate resolution and relatively high throughput. Its reported 195 mW low-power figure helps frame power-budget planning, although operating conditions must be verified. The converter can feed a microcontroller or FPGA through a carefully timed digital interface. Designers should budget for supply decoupling, input protection, clock distribution, and signal-return-path control.
Recommended
Instrumentation and Test Equipment
The ADS820U can digitize analog waveforms in laboratory or field instrumentation where 10-bit resolution and 20-MSPS sampling are sufficient. A 65 MHz track-and-hold bandwidth, as reported in the supplied source summary, can help when the input path must present a wider bandwidth than the sample rate. That figure must be interpreted with the datasheet test conditions. The design should include calibrated gain, offset control, input clamping, and a stable reference strategy.
Recommended
Power and Motion Feedback Systems
ADS820U can sample rapidly changing feedback signals in power-conversion, motor-control, or motion-control systems after suitable current or voltage conditioning. The 20-MSPS throughput offers more temporal resolution than a low-rate general-purpose ADC, while the 10-bit code width may be sufficient for supervisory loops or quantized control feedback. Use the converter's internal reference only where its accuracy is adequate, and verify the permitted input and common-mode range before selecting external conditioning.
Recommended
Educational and Prototype Electronics
ADS820U is useful in engineering education, breadboard-compatible prototypes, and legacy-style digital conversion experiments because it is listed in a 28-SOIC package and combines the converter, track-and-hold, and reference functions. Students can evaluate sampling frequency, quantization error, code transitions, and parallel data capture. For production hardware, replace temporary interconnections with controlled routing, decoupling, grounding, and input protection based on the current datasheet.
Recommended
Recommended Products Summary
Engineering reference data for ADS820U — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS820 | ADS820U/1K |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 28-SOIC | 28-SOIC family association; confirm ordering table | 28-SOIC |
| Resolution | 10 bit | 10 bit | 10 bit |
| Sampling Rate | 20 MSPS | 20 MHz | 20 MSPS |
| Input Configuration | Differential or single-ended | Differential or single-ended | SE/diff input |
| Architecture | Pipelined | Pipelined | Pipelined |
| Supply | +5 V single supply | +5 V | +5 V |
Key Differentiators
- Matched 10-bit and 20-MSPS conversion profile (vs ADS820)
- Differential and single-ended input flexibility (vs ADS820)
- Integrated reference and acquisition functions (vs ADS820U/1K)
Design Notes
The supplied source reports 195 mW low power for the ADS820U, but the operating conditions behind that figure are not included. Before estimating board power, multiply converter dissipation by the number of active devices and add the logic and analog-support loads. Provide the specified +5 V supply and follow the TI recommended decoupling layout; do not assume that a nominal 5 V rail automatically meets the converter's voltage, noise, and transient requirements.
Treat the analog input as a timing-critical signal. Place the input protection and conditioning network close to the ADC, minimize loop area, and route the sampling clock away from sensitive input and reference nodes. The reported 65 MHz track-and-hold bandwidth indicates wideband behavior, but usable signal bandwidth still depends on the source impedance, antialias filter, ADC input characteristics, and clock edge requirements in the datasheet.
Do not select a replacement solely because it is also a 10-bit, 20-MSPS ADC. Confirm the 28-SOIC pin assignment, supply voltage, input range, differential polarity, clock edge, output coding, reference behavior, and acquisition timing. The verified material does not enumerate all 28 pin functions, so the current TI ADS820 datasheet and its ordering table are required before making a PCB or drop-in substitution.
Compliance Information
The supplied verified snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-mineral status. Compliance claims must be confirmed on the current TI product page or manufacturer documentation.