ADS7044 Ultra-Low-Power Ultra-Small-Size SAR ADC | 12 Bit | 1MSPS | Fully Differential | TI.com

ADS7044 (ACTIVE)

Ultra-Low-Power Ultra-Small-Size SAR ADC | 12 Bit | 1MSPS | Fully Differential

 

Description

The ADS7044 is a 1-MSPS, analog-to-digital converter (ADC). The device supports a wide analog input voltage range (±1.65 V to ±3.6 V) and includes a capacitor-based, successive-approximation register (SAR) ADC with an inherent sample-and-hold circuit. The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with the CS falling edge and SCLK is used for conversion and serial data output. The device supports a wide digital supply range (1.65 V to 3.6 V), enabling direct interface to a variety of host controllers. The device complies with the JESD8-7A standard for normal DVDD range (1.65 V to 1.95 V).

The device is available in 8-pin, miniature, leaded, and X2QFN packages and is specified for operation from –40°C to 125°C. Miniature form-factor and extremely low-power consumption make this device suitable for space-constrained, battery-powered applications.

Features

  • Industry’s First SAR ADC with Nanowatt Power Consumption:
    • 261 µW at 1 MSPS with 1.8-V AVDD
    • 900 µW at 1 MSPS with 3-V AVDD
    • 90 µW at 100 kSPS with 3-V AVDD
    • Less than 1 µW at 1 kSPS with 3-V AVDD
  • Industry’s Smallest SAR ADC:
    • X2QFN-8 Package with 2.25-mm2 Footprint
  • 1-MSPS Throughput with Zero Data Latency
  • Wide Operating Range:
    • AVDD: 1.65 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V (Independent of AVDD)
    • Temperature Range: –40°C to 125°C
  • Excellent Performance:
    • 12-Bit Resolution with NMC
    • ±1-LSB (Max) DNL and INL
    • 71-dB SNR with 3-V AVDD
    • –85-dB THD with 3-V AVDD
  • Unipolar, Differential Input Range: –AVDD to AVDD
  • Integrated Offset Calibration
  • SPI™-Compatible Serial Interface: 16 MHz
  • JESD8-7A Compliant Digital I/O

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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
ADS7044 ADS7040 ADS7041 ADS7043
12     8     10     12    
1000     1000     1000     1000    
1     1     1     1    
SPI     SPI     SPI     SPI    
-40 to 125     -40 to 125     -40 to 125     -40 to 125    
VSSOP | 8
X2QFN | 8    
VSSOP | 8
X2QFN | 8    
VSSOP | 8
X2QFN | 8    
VSSOP | 8
X2QFN | 8    
0.99 | 1ku     0.40 | 1ku     0.60 | 1ku     0.99 | 1ku    
0.261     0.171     0.189     0.243    
8VSSOP: 6 mm2: 3.1 x 2 (VSSOP | 8)
8X2QFN: 2 mm2: 1.5 x 1.5 (X2QFN | 8)    
8VSSOP: 6 mm2: 3.1 x 2 (VSSOP | 8)
8X2QFN: 2 mm2: 1.5 x 1.5 (X2QFN | 8)    
8VSSOP: 6 mm2: 3.1 x 2 (VSSOP | 8)
8X2QFN: 2 mm2: 1.5 x 1.5 (X2QFN | 8)    
8VSSOP: 6 mm2: 3.1 x 2 (VSSOP | 8)
8X2QFN: 2 mm2: 1.5 x 1.5 (X2QFN | 8)    
SAR     SAR     SAR     SAR    
Differential     Single-Ended     Single-Ended     Pseudo-Differential    
   
   
   
   
Supply     Supply     Supply     Supply    
Small Size     Small Size     Small Size     Small Size    
3.6     3.6     3.6     3.6    
0     0     0     0    
1.65     1.65     1.65     1.65    
3.6     3.6     3.6     3.6    
1.65     1.65     1.65     1.65    
3.6     3.6     3.6     3.6    
1     0.5     0.8     1    
71     49     61     69.5    
71     49     61     70    
-85     -70     -75     -80    
Catalog     Catalog     Catalog     Catalog