ADS5294 Eight-Channel, 14-Bit, 80-MSPS Analog-to-Digital Converter (ADC) | TI.com

ADS5294 (ACTIVE)

Eight-Channel, 14-Bit, 80-MSPS Analog-to-Digital Converter (ADC)

 

Description

The ADS5294 is a low-power 80-MSPS 8-Channel ADC that uses CMOS process technology and innovative circuit techniques. Low power consumption, high SNR, low SFDR, and consistent overload recovery allow users to design high-performance systems.

The digital processing block of the ADS5294 integrates several commonly used digital functions for improving system performance. The device includes a digital filter module that has built-in decimation filters (with lowpass, highpass and bandpass characteristics). The decimation rate is also programmable (by 2, by 4, or by 8). This rate is useful for narrow-band applications, where the filters are used to conveniently improve SNR and knock-off harmonics, while at the same time reducing the output data rate. The device includes an averaging mode where two channels (or even four channels) are averaged to improve SNR.

Serial LVDS outputs reduce the number of interface lines and enable the highest system integration. The digital data from each channel ADC is output over one or two wires of LVDS output lines depending on the ADC sampling rate. This 2-wire interface maintains a low serial-data rate, allowing low-cost FPGA-based receivers to be used even at a high sample rate. The ADC resolution is programmed to 12-bit or 14-bit through registers. A unique feature is the programmable-mapping module that allows flexible mapping between the input channels and the LVDS output pins. This module greatly reduces the complexity of LVDS-output routing, and by reducing the number of PCB layers, potentially results in cheaper system boards.

The device integrates an internal reference trimmed to accurately match across devices. Internal reference mode achieves the best performance. External references can also drive the device.

The device is available in a 12-mm × 12-mm 80-pin QFP package. The device is specified over a –40°C to 85°C operating temperature range. ADS5294 is completely pin-to-pin and register compatible to ADS5292.

Features

  • Maximum Sample Rate: 80 MSPS/14-Bit
  • High Signal-to-Noise Ratio
    • 75.5-dBFS SNR at 5 MHz / 80 MSPS
    • 78.2-dBFS SNR at 5 MHz / 80 MSPS and Decimation Filter Enabled
    • 84-dBc SFDR at 5 MHz / 80 MSPS
  • Low Power Consumption
    • 58 mW/CH at 50 MSPS
    • 77 mW/CH at 80 MSPS (2-LVDS Wire Per Channel)
  • Digital Processing Block
    • Programmable FIR Decimation Filter and Oversampling to Minimize Harmonic Interference
    • Programmable IIR High-Pass Filter to Minimize DC Offset
    • Programmable Digital Gain: 0 dB to 12 dB
    • 2-Channel or 4-Channel Averaging
  • Flexible Serialized LVDS Outputs:
    • One or Two Wires of LVDS Output Lines Per Channel Depending on ADC Sampling Rate
    • Programmable Mapping Between ADC Input Channels and LVDS Output Pins-Eases Board Design
    • Variety of Test Patterns to Verify Data Capture by FPGA/Receiver
  • Internal and External References
  • 1.8-V Operation for Low Power Consumption
  • Low-Frequency Noise Suppression
  • Recovery From 6-dB Overload Within 1 Clock Cycle
  • Package: 12-mm × 12-mm 80-Pin QFP

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Parametrics Compare all products in High-speed ADCs (>10MSPS)

 
Sample Rate (Max) (MSPS)
Features
Resolution (Bits)
Number of input channels
SNR (dB)
ENOB (Bits)
SFDR (dB)
Power consumption (Typ) (mW)
Input range (Vp-p)
Interface
Operating temperature range (C)
Analog input BW (MHz)
Input buffer
Package Group
Package size: mm2:W x L (PKG)
Rating
Architecture
DNL (Typ) (+/-LSB)
INL (Typ) (+/-LSB)
Reference mode
ADS5294 ADS5292 ADS5295 ADS5296A ADS52J65 ADS52J90
80     80     100     80
200    
125     65    
Low Power     Low Power     High Performance     Low Power     High Performance     Low Power    
12
14    
12
14    
12     10
12    
16     14    
8     8     8     4
8    
8     16    
75.5     70     70.6     70.3     78     73.5    
12.2     11.3     11.4     11.3     13      
84     85     86     83     85     80    
464     376     640     560     560     656    
2     2     2     2     2     2    
Serial LVDS     Serial LVDS     Serial LVDS     Serial LVDS     JESD204B     JESD204B
Serial LVDS    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
550     550     500     500     250     70    
No     No     No     No     No     No    
HTQFP | 80     HTQFP | 80     HTQFP | 80     VQFN | 64     VQFN | 64     NFBGA | 198    
80HTQFP: 196 mm2: 14 x 14 (HTQFP | 80)     80HTQFP: 196 mm2: 14 x 14 (HTQFP | 80)     80HTQFP: 196 mm2: 14 x 14 (HTQFP | 80)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     64VQFN: 81 mm2: 9 x 9 (VQFN | 64)     198NFBGA: 135 mm2: 15 x 9 (NFBGA | 198)    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
Pipeline     Pipeline     Pipeline     Pipeline     Pipeline     SAR    
0.5     0.05     0.05     0.3     1.5     1.5    
2.2     0.4     0.4     0.2     3     3    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int