ADS8508
12-Bit 250kHz CMOS Analog-to-Digital Converter With Serial Interface 2.5V Internal Reference
ADS8508
- 250-kHz Sampling Rate
- 4-V, 5-V, 10-V, ±3.33-V, ±5-V, and ±10-V Input Ranges
- 73-dB SINAD With 45-kHz Input
- ±0.45 LSB Max INL
- ±0.45 LSB Max DNL, 12-Bits No Missing Codes
- ±1 LSB Bipolar Zero Errors
- ±0.4 PPM/°C Bipolar Zero Error Drift
- Six Specified Input Ranges
- SPI Compatible Serial Output with Daisy-Chain (TAG) Feature
- 5-V Supply
- Pin-Compatible With ADS7808 (Low Speed) and 16-Bit ADS8509/7809
- Uses Internal or External Reference
- 70-mW Typ Power Dissipation at 250 KSPS
- 20-Pin SO Package
- Simple DSP Interface
- APPLICATIONS
- Industrial Process Control
- Data Acquisition Systems
- Digital Signal Processing
- Medical Equipment
- Instrumentation
The ADS8508 is a complete 12-bit sampling analog-to-digital (A/D) converter using state-of-the-art CMOS structures. It contains a complete 12-bit, capacitor-based, successive approximation register (SAR) A/D converter with sample-and-hold, reference, clock, and a serial data interface. Data can be output using the internal clock or can be synchronized to an external data clock. The ADS8508 also provides an output synchronization pulse for ease of use with standard DSP processors.
The ADS8508 is specified at a 250-kHz sampling rate over the full temperature range. Precision resistors provide various input ranges including ±10 V and 0 V to 5 V, while the innovative design allows operation from a single +5-V supply with power dissipation under 100 mW.
The ADS8508 is available in a 20-pin SO package, fully specified for operation over the industrial -40°C to 85°C temperature range.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | 12-Bit 250-KSPS Serial CMOS Sampling ADC datasheet | 22 Sep 2005 | |
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 21 May 2015 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 2 | 17 Mar 2011 | ||
Application note | Upgrading From ADS7808/09 to ADS8508/09 Devices | 12 Jun 2007 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
JITTER-SNR-CALC — Jitter and SNR calculator
JITTER-SNR-CALC can be used for calculating theoretical Signal to Noise (SNR) performance of ADCs based on input frequency and clock jitter.
Supported products & hardware
Products
High-speed ADCs (≥10 MSPS)
Precision ADCs
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
SOIC (DW) | 20 | Ultra Librarian |
Ordering & quality
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- Ongoing reliability monitoring
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Support & training
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