ADC78H90 8-Channel, 500 KSPS, 12-Bit A/D Converter | TI.com

ADC78H90 (ACTIVE)

8-Channel, 500 KSPS, 12-Bit A/D Converter

 

Description

The ADC78H90 is a low-power, eight-channel CMOS 12-bit analog-to-digital converter with a conversion throughput of 500 kSPS. 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 AIN1 through AIN8.

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 ADC78H90 may be operated with independent analog and digital supplies. The analog supply (AVDD) can range from +2.7V to +5.25V, and the digital supply (DVDD) can range from +2.7V to AVDD. Normal power consumption using a +3V or +5V supply is 1.5 mW and 8.3 mW, respectively. The power-down feature reduces the power consumption to just 0.3 µW using a +3V supply, or 0.5 µW using a +5V supply.

The ADC78H90 is packaged in a 16-lead TSSOP package. Operation over the industrial temperature range of −40°C to +85°C is ensured.

Features

  • Eight input channels
  • Variable power management
  • Independent analog and digital supplies
  • SPI™/QSPI™/MICROWIRE™/DSP compatible
  • Packaged in 16-lead TSSOP

Key Specifications

  • Conversion Rate: 500kSPS
  • DNL: ± 1LSB (max)
  • INL: ± 1LSB (max)
  • Power Consumption
    • 3V Supply: 1.5 mW (typ)
    • 5V Supply: 8.3 mW (typ)

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
Number of input channels
Interface
Operating temperature range (C)
Package Group
Approx. price (US$)
Power consumption (Typ) (mW)
Package size: mm2:W x L (PKG)
Architecture
Input type
Multi-channel configuration
Reference mode
Features
Input range (Max) (V)
Input range (Min) (V)
Analog voltage AVDD (Min) (V)
Analog voltage AVDD (Max) (V)
Digital supply (Min) (V)
Digital supply (Max) (V)
INL (Max) (+/-LSB)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADC78H90 ADC088S052 ADC108S052 ADC128S022 ADC128S052 ADC128S052-Q1 ADC128S102 ADC78H89
12     8     10     12     12     12     12     12    
500     500     500     200     500     500     1000     500    
8     8     8     8     8     8     8     7    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
Microwire (Serial I/O)
QSPI
SPI    
-40 to 85     -40 to 105     -40 to 105     -40 to 105     -40 to 125     -40 to 125     -40 to 105     -40 to 85    
TSSOP | 16     TSSOP | 16     TSSOP | 16     TSSOP | 16     TSSOP | 16     TSSOP | 16     TSSOP | 16     TSSOP | 16    
2.54 | 1ku     1.56 | 1ku     2.19 | 1ku     2.25 | 1ku     2.42 | 1ku     2.94 | 1ku     2.61 | 1ku     2.50 | 1ku    
1.5     1.2     1.5     1.2     1.2     1.6     2.3     1.5    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
SAR     SAR     SAR     SAR     SAR     SAR     SAR     SAR    
Single-Ended     Single-Ended     Single-Ended     Single-Ended     Single-Ended     Single-Ended     Single-Ended     Single-Ended    
Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed    
Supply     Supply     Supply     Supply     Supply     Supply     Supply     Supply