ADS7800KU/1K - 12-Bit 333kSPS SAR ADC | Texas Instruments
MPN: ADS7800KU/1K ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.8 | $980.00 |
| 500 | $8.5 | $4,250.00 |
| 1,000 | $7.2 | $7,200.00 |
Drop-in alternatives for ADS7800KU/1K — 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:
ADS7800KU
✅ Drop-In📋 Reference alternative (not in catalog)
ADS7800U
✅ Drop-In📋 Reference alternative (not in catalog)
ADS7800KU/1K Maximum Ratings & Electrical Characteristics
| Resolution | 12 bit |
| Sampling Rate | 333 kSPS |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Input Voltage Range | ±10V, ±5V |
| Architecture | SAR |
| Conversion Time | 2.7 µs |
| Supply Voltage - Positive | +5V |
| Supply Voltage - Negative | -12V or -15V |
| Operating Temperature Range | 0°C to +70°C |
| Package | 24-SOIC |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Number of Terminals | 24 |
| RoHS Status | Compliant |
ADS7800KU/1K Pin Configuration
| Pin 1 | VANA — Analog positive supply (+5V) |
| Pin 2 | VIN — Analog input |
| Pin 3 | VREF — Reference input/output |
| Pin 4 | AGND — Analog ground |
| Pin 5 | VEE — Negative supply (-12V or -15V) |
| Pin 6 | CAP — Internal reference bypass |
| Pin 7 | CLK — Clock input |
| Pin 8 | CS — Chip select (active low) |
| Pin 9 | RD — Read (active low) |
| Pin 10 | BUSY — Busy output |
| Pin 11 | DB0 — Data bit 0 (LSB) |
| Pin 12 | DB1 — Data bit 1 |
| Pin 13 | DB2 — Data bit 2 |
| Pin 14 | DB3 — Data bit 3 |
| Pin 15 | DB4 — Data bit 4 |
| Pin 16 | DB5 — Data bit 5 |
| Pin 17 | DB6 — Data bit 6 |
| Pin 18 | DB7 — Data bit 7 |
| Pin 19 | DB8 — Data bit 8 |
| Pin 20 | DB9 — Data bit 9 |
| Pin 21 | DB10 — Data bit 10 |
| Pin 22 | DB11 — Data bit 11 (MSB) |
| Pin 23 | DGND — Digital ground |
| Pin 24 | VDIG — Digital positive supply (+5V) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADS7800KU/1K is suitable for 6 applications: Industrial Control Systems, Medical Instrumentation, Automotive Systems, Data Acquisition Systems, Power Monitoring, Test and Measurement.
Industrial Control Systems
The ADS7800KU/1K is ideal for industrial control systems due to its 12-bit resolution and 333 kSPS sampling rate. It can digitize analog signals from sensors and transducers with standard ±10V ranges, enabling precise monitoring and control of motors, valves, and process variables. Its fast conversion time of 2.7 µs allows real-time feedback loops, while the internal sample-and-hold simplifies the analog front-end. The device operates from a +5V supply and a negative supply, making it compatible with common industrial power rails. Its commercial temperature range (0°C to +70°C) suits most factory environments. The parallel digital interface with three-state outputs facilitates easy connection to microcontrollers and DSPs, reducing design complexity.
Recommended
Medical Instrumentation
In medical instrumentation, the ADS7800KU/1K provides high-resolution digitization of physiological signals such as ECG, EEG, and blood pressure. Its 12-bit resolution ensures accurate representation of small signal variations, while the 333 kSPS sampling rate captures fast transients. The standard ±5V input range is compatible with many medical sensor outputs. The device's low power consumption and small SOIC package make it suitable for portable and implantable devices. The internal reference and clock reduce external component count, enhancing reliability. The commercial temperature range is adequate for clinical environments. The parallel interface allows direct connection to medical-grade microcontrollers, enabling real-time monitoring and diagnostics.
Recommended
Automotive Systems
The ADS7800KU/1K is used in automotive systems for applications such as battery monitoring, motor control, and sensor data acquisition. Its 12-bit resolution and 333 kSPS sampling rate enable accurate measurement of voltage, current, and temperature. The standard ±10V input range is compatible with automotive battery voltages and sensor outputs. The device operates from a +5V supply, which is common in automotive electronics, and the negative supply can be derived from a -12V rail. The commercial temperature range (0°C to +70°C) is suitable for passenger cabin applications, but not for under-hood environments. The parallel interface simplifies integration with automotive microcontrollers. Its robust CMOS design ensures reliable operation in noisy automotive environments.
Recommended
Data Acquisition Systems
The ADS7800KU/1K is a core component in data acquisition systems, providing high-speed, high-resolution digitization of multiple analog channels. Its 333 kSPS sampling rate allows multiplexing of several input channels while maintaining adequate per-channel bandwidth. The 12-bit resolution ensures good dynamic range for most measurement applications. The standard ±10V and ±5V input ranges accommodate a wide variety of sensors and transducers. The internal sample-and-hold and reference simplify the analog front-end, reducing component count and board space. The parallel interface with three-state outputs enables easy connection to data acquisition cards and microcontrollers. The device's low power consumption is beneficial for portable data loggers.
Recommended
Power Monitoring
The ADS7800KU/1K is well-suited for power monitoring applications, such as measuring voltage and current in industrial power systems. Its 12-bit resolution and 333 kSPS sampling rate enable accurate measurement of AC and DC signals, including harmonics and transients. The standard ±10V input range can directly interface with voltage and current transducers. The device's fast conversion time allows real-time monitoring of power quality. The parallel interface facilitates connection to digital signal processors for advanced analysis. The commercial temperature range is adequate for indoor power monitoring equipment. The device's low power consumption is beneficial for energy-efficient designs.
Recommended
Test and Measurement
In test and measurement equipment, the ADS7800KU/1K provides high-speed, high-resolution digitization for oscilloscopes, data loggers, and spectrum analyzers. Its 333 kSPS sampling rate captures fast waveforms, while 12-bit resolution ensures accurate amplitude measurement. The standard ±10V input range is compatible with many test signals. The device's internal sample-and-hold and reference reduce external component count, simplifying design. The parallel interface allows high-speed data transfer to FPGAs or DSPs for real-time processing. The commercial temperature range is suitable for benchtop instruments. The device's low power consumption is beneficial for portable test equipment.
Recommended
Recommended Products Summary
Engineering reference data for ADS7800KU/1K — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADS7800KU | ADS7800KP | ADS7800U | AD1671 |
|---|---|---|---|---|---|
| Package | 24-SOIC | 24-SOIC | 24-PDIP | 24-SOIC | 28-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 333 kSPS | 333 kSPS | 333 kSPS | 333 kSPS | 1 MSPS |
| Input Voltage Range | ±10V, ±5V | ±10V, ±5V | ±10V, ±5V | ±10V, ±5V | ±5V, ±10V |
| Conversion Time | 2.7 µs | 2.7 µs | 2.7 µs | 2.7 µs | 1 µs |
| Operating Temperature Range | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C |
| Supply Voltage | +5V, -12V/-15V | +5V, -12V/-15V | +5V, -12V/-15V | +5V, -12V/-15V | +5V, -12V/-15V |
Key Differentiators
- Same die and package as ADS7800KU, but with tape and reel packaging for automated assembly (vs ADS7800KU)
- Higher sampling rate than many competing 12-bit ADCs (vs AD1671)
- Standard ±10V and ±5V input ranges simplify interface (vs AD1671)
Design Notes
The ADS7800KU/1K requires a +5V supply and a negative supply (-12V or -15V). Ensure these supplies are well-regulated and filtered to minimize noise. Use 0.1µF ceramic capacitors close to the VANA and VDIG pins, and a 10µF tantalum capacitor for bulk decoupling. The negative supply should also be decoupled with a 0.1µF capacitor to ground.
For optimal performance, separate analog and digital ground planes and connect them at a single point near the ADC. Place the analog input traces away from digital traces to avoid coupling. Use a ground plane under the ADC to reduce noise. Keep the reference bypass capacitor (CAP pin) close to the device and connect it to analog ground.
Ensure the analog input source impedance is low enough to drive the ADC's sample-and-hold without significant settling errors. A buffer amplifier may be required. Also, avoid exceeding the absolute maximum ratings on the input pins. The reference voltage should be stable and accurate; consider using an external precision reference if higher accuracy is needed.
Compliance Information
RoHS compliant per distributor listings. Not AEC-Q100 qualified. Lead-free per RoHS compliance.
