ADS7884 2.7V-5.5V, 10 Bit, 3MSPS, Serial ADC | TI.com

ADS7884 (ACTIVE)

2.7V-5.5V, 10 Bit, 3MSPS, Serial ADC

 

Description

The ADS7884 is a 10-bit, 3-MSPS analog-to-digital converter (ADC), and the ADS7885 is a 8-bit, 3-MSPS ADC. The devices include a capacitor based SAR A/D converter with inherent sample and hold. The serial interface in each device is controlled by the CS and SCLK signals for glueless connections with microprocessors and DSPs. The input signal is sampled with the falling edge of CS, and SCLK is used for conversion and serial data output.

The devices operate from a wide supply range from 2.7 V to 5.5 V. The low power consumption of the devices make them suitable for battery-powered applications. The devices also include a power saving powerdown feature for when the devices are operated at lower conversion speeds.

The high level of the digital input to the device is not limited to device VDD. This means the digital input can go as high as 5.5 V when device supply is 2.7 V. This feature is useful when digital signals are coming from other circuit with different supply levels. Also this relaxes restriction on power up sequencing.

The ADS7884 and ADS7885 are available in a 6-pin SOT23 package and are specified for operation from -40°C to 125°C.

Features

  • 3-MHz Sample Rate Serial Device
  • 10-Bit Resolution — ADS7884
  • 8-Bit Resolution — ADS7885
  • Zero Latency
  • 48-MHz Serial Interface
  • Supply Range: 2.7 V to 5.5 V
  • Low Power Dissipation:
    • 6.8 mW at 3-V VDD, 2.5 MSPS
    • 15 mw at 5-V VDD, 3 MSPS
  • ±0.3 LSB INL, ±0.3 LSB DNL — ADS7884
  • ±0.15 LSB INL, ±0.1 LSB DNL — ADS7885
  • 61.7 dB SINAD, -81 dB THD — ADS7884
  • 49.8 dB SINAD, -68 dB THD — ADS7885
  • Unipolar Input Range: 0 V to VDD
  • Powerdown Current: 1 µA
  • Wide Input Bandwidth: 30 MHz at 3 dB
  • 6-Pin SOT23 Package
  • APPLICATIONS
    • Base Band Converters in Radio Communication
    • Motor Current/Bus Voltage Sensors in Digital Drives
    • Optical Networking (DWDM, MEMS Based Switching)
    • Optical Sensors
    • Battery Powered Systems
    • Medical Instrumentations
    • High-Speed Data Acquisition Systems
    • High-Speed Closed-Loop Systems

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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)
THD (Typ) (dB)
Rating
ADS7884
10    
3000    
1    
SPI    
-40 to 125    
SOT-23 | 6    
1.68 | 1ku    
15    
6SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 6)    
SAR    
Single-Ended    
   
Supply    
Small Size    
5.5    
0    
2.7    
5.5    
2.7    
5.5    
0.8    
61.7    
-81    
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