AD7794 datasheet(7/21 Pages) AD

部品番号	AD7794

部品情報	Low Power, 24-Bit Sigma-Delta ADC with In-Amp and Embedded Reference (6 Channel)

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メーカー	AD [Analog Devices]

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Preliminary Technical Data

AD7794

REV.PrE 6/04 | Page 7

Parameter

AD7794B

Unit

Test Conditions/Comments

EXCITATION CURRENT SOURCES (IEXC1 and IEXC2)

Output Current

10/200/1000

µA nom

Initial Tolerance at 25°C

±5

% typ

Drift

200

ppm/°C typ

Initial Current Matching at 25°C

±1

% typ

Matching between IEXC1 and EXC2. VOUT = 0 V

Drift Matching

20

ppm/°C typ

Line Regulation (VDD)

2.1

ppm/V max

AVDD = 5 V ± 5%. Typically 1.25 ppm/V

Load Regulation

0.3

ppm/V typ

Output Compliance

AVDD – 0.6

V max

Current Sources Programmed to 10 µA or 200 µA

AVDD – 1

V max

Current Sources Programmed to 1 mA

GND – 30 mV

V min

BIAS VOLTAGE GENERATOR

VBIAS

AVDD/2

V nom

VBIAS Generator Start-Up Time

TBD

ms/nF typ

Dependent on the Capacitance connected to AIN

TEMPERATURE SENSOR

Accuracy

TBD

°C typ

LOW SIDE POWER SWITCH

RON

5

Ω max

AVDD = 5 V

7

Ω max

AVDD = 3 V

Allowable Current

20

mA max

Continuous Current

DIGITAL OUTPUTS (P1 & P2)

VOH, Output High Voltage2

AVDD – 0.6

V min

AVDD = 3 V, ISOURCE = 100 µA

VOL, Output Low Voltage2

0.4

V max

AVDD = 3 V, ISINK = 100 µA

VOH, Output High Voltage2

4

V min

AVDD = 5 V, ISOURCE = 200 µA

VOL, Output Low Voltage2

0.4

V max

AVDD = 5 V, ISINK = 800 µA

Floating-State Leakage Current

±1

µA max

Floating-State Output Capacitance

10

pF typ

INTERNAL/EXTERNAL CLOCK

Internal Clock

Fequency

64 ±2%

Duty Cycle

50:50

Drift

0.01

External Clock

Frequency

64

Duty Cycle

45:55

LOGIC INPUTS

All Inputs Except SCLK, DIN and CLK2

VINL, Input Low Voltage

0.8

V max

DVDD = 5 V

0.4

V max

DVDD = 3 V

VINH, Input High Voltage

2.0

V min

DVDD = 3 V or 5 V

SCLK and DIN (Schmitt-Triggered

Input)2

VT(+)

1.4/2

V min/V max

DVDD = 5 V

VT(–)

0.8/1.4

V min/V max

DVDD = 5 V

VT(+) – VT(–)

0.3/0.85

V min/V max

DVDD = 5 V

VT(+)

0.9/2

V min/V max

DVDD = 3 V

VT(–)

0.4/1.1

V min/V max

DVDD = 3 V

VT(+) - VT(–)

0.3/0.85

V min/V max

DVDD = 3 V

CLK2

VINL, Input Low Voltage

0.8

V max

DVDD = 5 V

VINL, Input Low Voltage

0.4

V max

DVDD = 3 V

VINH, Input High Voltage

3.5

V min

DVDD = 5 V

同様の部品番号 - AD7794

メーカー	部品番号	データシート	部品情報
Analog Devices	AD7794	767Kb / 37P	6-Channel, Low Noise, Low Power REV. D
	AD7794BRU	814Kb / 36P	6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. D
	AD7794BRU-REEL	814Kb / 36P	6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. D
	AD7794BRUZ-REEL1	814Kb / 36P	6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. D
	AD7794BRUZ1	814Kb / 36P	6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. D

More results

同様の説明 - AD7794

メーカー	部品番号	データシート	部品情報
Analog Devices	AD7792	241Kb / 18P	Low Power, 16/24-Bit Sigma-Delta ADC with Low-Noise In-Amp and Embedded Reference REV.PrF 6/04
	AD7798	499Kb / 17P	Low Power, 24-Bit/16-Bit Sigma-Delta ADC with In-Amp Rev. B
	AD7124-4-EP	272Kb / 17P	4-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference Rev. 0
	ADFS7124-4	3Mb / 93P	4-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference Rev. 0
	ADFS7124-8	2Mb / 93P	8-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference Rev. 0
	AD7124-4	1Mb / 90P	4-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference
	AD7124-8	1Mb / 91P	8-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference
	AD7124-8	1Mb / 93P	8-Channel, Low Noise, Low Power, 24-Bit Sigma-Delta ADC with PGA and Reference
	AD7787	307Kb / 20P	Low Power, 2-Channel 24-Bit Sigma-Delta ADC REV. A
	AD7787	326Kb / 20P	Low Power, 2-Channel 24-Bit Sigma-Delta ADC REV. 0

More results

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