(ACTIVE) 8-Channel, 500 ksps to 1 Msps, 12-Bit A/D Converter


Functional Diagram

Typical application circuit

Typical Performance


The ADC128S102 is a low-power, eight-channel CMOS 12-bit analog-to-digital converter specified for conversion throughput rates of 500 ksps to 1 MSPS. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit. It can be configured to accept up to eight input signals at inputs IN0 through IN7.

The output serial data is straight binary and is compatible with several standards, such as SPI, QSPI, MICROWIRE, and many common DSP serial interfaces.

The ADC128S102 may be operated with independent analog and digital supplies. The analog supply (VA) can range from +2.7 V to +5.25 V, and the digital supply (VD) can range from +2.7 V to VA. Normal power consumption using a +3-V or +5-V supply is 2.3 mW and 10.7 mW, respectively. The power-down feature reduces the power consumption to 0.06 µW using a +3-V supply and 0.25 µW using a +5-V supply.

The ADC128S102 is packaged in a 16-lead TSSOP package. Operation over the extended industrial temperature range of –40°C to +105°C is ensured.


  • Eight Input Channels
  • Variable Power Management
  • Independent Analog and Digital
  • Packaged in 16-Lead TSSOP
  • Key Specifications
    • Conversion Rate 500 ksps to 1 MSPS
    • DNL (VA = VD = 5.0 V) +1.5 / –0.9
    • LSB (maximum) INL (VA = VD = 5.0 V) ±1.2 LSB
    • Power Consumption
      • 3V Supply 2.3 mW (typical)
      • 5V Supply 10.7 mW (typical)


Resolution (Bits) 12    
Sample Rate (Max) (kSPS) 1000    
Number of input channels 8    
Interface Microwire (Serial I/O)^QSPI^SPI    
Operating temperature range (C) -40 to 105    
Package Group TSSOP|16    
Approx. price (US$) 2.61 | 1ku    
Power consumption (Typ) (mW) 2.3    
Package size: mm2:W x L (PKG) 16TSSOP: 22 mm2: 4.4 x 5 (TSSOP|16)    
Architecture SAR    
Input type Single-Ended    
Multi-channel configuration Multiplexed    
Reference mode Supply    
Features N/A    
Input range (Max) (V) 5.25    
Input range (Min) (V) 0    
Analog voltage AVDD (Min) (V) 2.7    
Analog voltage AVDD (Max) (V) 5.25    
Digital supply (Min) (V) 2.7    
Digital supply (Max) (V) 5.25    
INL (Max) (+/-LSB) 1    
SINAD (dB) 73    
SNR (dB) 73    
THD (Typ) (dB) -88    
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