ADS7946

AKTIV

14 Bit, 2 MSPS, zweikanaliger, unipolarer, pseudodifferenzieller u-Power SAR-ADC

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Datenblatt

document-pdfAcrobat 14-Bit, 2-MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power ADCs datasheet (Rev. B) (Englisch)

ADS7946

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Resolution (Bits)

14

Sample rate (max) (ksps)

2000

Number of input channels

2

Interface type

SPI

Architecture

SAR

Input type

Pseudo-Differential, Single-ended

Multichannel configuration

Multiplexed

Rating

Catalog

Reference mode

External

Input voltage range (max) (V)

5.25

Input voltage range (min) (V)

0

Features

Small Size

Operating temperature range (°C)

-40 to 125

Power consumption (typ) (mW)

10.5

Analog supply voltage (min) (V)

2.7

Analog supply voltage (max) (V)

5.25

SNR (dB)

82

Digital supply (min) (V)

1.65

Digital supply (max) (V)

5.25

Resolution (Bits)

14

Sample rate (max) (ksps)

2000

Number of input channels

2

Interface type

SPI

Architecture

SAR

Input type

Pseudo-Differential, Single-ended

Multichannel configuration

Multiplexed

Rating

Catalog

Reference mode

External

Input voltage range (max) (V)

5.25

Input voltage range (min) (V)

0

Features

Small Size

Operating temperature range (°C)

-40 to 125

Power consumption (typ) (mW)

10.5

Analog supply voltage (min) (V)

2.7

Analog supply voltage (max) (V)

5.25

SNR (dB)

82

Digital supply (min) (V)

1.65

Digital supply (max) (V)

5.25

WQFN (RTE)

16

9 mm² (3 mm × 3 mm)

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

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

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.

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.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Datum
*	Datenblatt	14-Bit, 2-MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power ADCs datasheet (Rev. B)	15.09.2011
	E-book	Best of Baker's Best: Precision Data Converters -- SAR ADCs	21.05.2015
	Anwendungshinweis	Determining Minimum Acquisition Times for SAR ADCs, part 2	17.03.2011
	Anwendungshinweis	Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A)	10.11.2010

Design und Entwicklung

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