ADS7945 14 ビット、2MSPS、2 チャネル、ユニポーラ、差動、m-Power SAR ADC | TIJ.co.jp

ADS7945
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14 ビット、2MSPS、2 チャネル、ユニポーラ、差動、m-Power SAR ADC

 

概要

The ADS7945/6 are 14-bit, 2 MSPS analog-to-digital converters (ADCs), with differential and single-ended inputs, respectively. The devices operate at a 2 MSPS sample rate with a standard 16-clock data frame. The devices feature both outstanding dc precision and excellent dynamic performance; the ADS7946 is pin-compatible with the 8/10/12-bit ADS7947/8/9 devices. The devices include a two-channel input multiplexer and a low-power successive approximation register (SAR) ADC with an inherent sample-and-hold (S/H) input stage.

The ADS7945/6 support a wide analog supply range that allows the full-scale input range to extend to ±5 V differential or 5 V single-ended. A simple SPI™, with a digital supply that can operate as low as 1.65 V, allows for easy interfacing to a wide variety of digital controllers. Automatic power-down can be enabled when operating at slower speeds to dramatically reduce power consumption.

Offered in a tiny 3 mm × 3 mm QFN package, the ADS7945/6 are fully specified over the extended temperature range of –40°C to +125°C and are suitable for a wide variety of data acquisition applications where high performance, low power, and small package size are key.

特長

  • Sample Rate: 2 MSPS
  • 14-Bit, Pin-Compatible with 8/10/12-bit ADS7947/8/9 Family (ADS7946)
  • Outstanding Performance:
    • SNR: 84 dB (ADS7945)
    • No Missing Codes
    • INL: 1.5 LSB (max) (ADS7945)
  • Low Power:
    • 11.6 mW at 2 MSPS Operation
    • Auto Power-Down at Lower Speeds: 7.2 mW at 500 kSPS1.4 mW at 100 kSPS0.3 mW at 20 kSPS
  • Wide Supply Range:
    • Analog: 2.7 V to 5.25 V
    • Digital: 1.65 V to AVDD
  • Simple Serial Interface (SPI)
  • Fully Specified from –40°C to +125°C
  • Tiny Footprint: 3 mm × 3 mm QFN

WEBENCH® Designer ADS7945



機能一覧

他の製品と比較 高精度 ADCs (<=10MSPS) メール Excelへダウンロード
Part number オーダー・オプション 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) SNR (dB) THD (Typ) (dB) Rating
ADS7945 ご注文 14     2000     2     SPI     -40 to 125     WQFN | 16     3.95 | 1ku     10.5     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     SAR     Differential     Multiplexed     Ext     Small Size     5.25     0     2.7     5.25     1.65     5.25     1.5     84     -92     Catalog    
ADS7946 ご注文 14     2000     2     SPI     -40 to 125     WQFN | 16     3.80 | 1ku     10.5     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     SAR     Pseudo-Differential
Single-Ended    
Multiplexed     Ext     Small Size     5.25     0     2.7     5.25     1.65     5.25     2.5     82     -85     Catalog    
ADS7947 ご注文 12     2000     2     SPI     -40 to 125     WQFN | 16     1.50 | 1ku     7.5     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     SAR     Pseudo-Differential
Single-Ended    
Multiplexed     Ext     Small Size     5.5     0     2.7     5.5     1.65     5.5     1     73     -85     Catalog    
ADS7948 ご注文 10     2000     2     SPI