ADS8517IDWR datasheet(4/34 Pages) TI

Part #	ADS8517IDWR

Description	16-Bit, 200-kSPS, Low-Power, Sampling ANALOG-TO-DIGITAL CONVERTER with Internal Reference and Parallel/Serial Interface

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Manufacturer	TI [Texas Instruments]

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ADS8517

SLAS527 – SEPTEMBER 2008.......................................................................................................................................................................................... www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

At TA = -40°C to +85°C, fS = 200 kHz, VDIG = VANA = 5 V, using internal reference (see Figure 39), unless otherwise noted.

ADS8517I

ADS8517IB(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

REFERENCE

Internal reference voltage

No load

2.48

2.5

2.52

2.48

2.5

2.52

V

Internal reference source current

1

µA

(must use external buffer)

Internal reference drift

8

ppm/°C

External reference voltage range

2.3

2.5

2.7

2.3

2.5

2.7

V

for specified linearity

External reference current drain

External 2.5-V reference

100

µA

DIGITAL INPUTS

VIL

Low-level input voltage(9)

VDIG = 1.65 V to 5.5 V

–0.3

0.6

–0.3

0.6

V

VIH

High-level input voltage(9)

VDIG = 1.65 V to 5.5 V

0.5 x VDIG

VDIG + 0.3

0.5 x VDIG

VDIG + 0.3

V

IIL

Low-level input current

VIL = 0 V

±10

µA

IIH

High-level input current

VIH = 5 V

±10

µA

DIGITAL OUTPUTS

Data format - Parallel 16-bits in 2-bytes, Serial

Data coding - Binary twos complement or straight binary

ISINK = 1.6mA,

VOL

Low-level output voltage

0.45

V

VDIG = 1.65V to 5.5V

ISOURCE = 500µA,

VOH

High-level output voltage

VDIG – 0.45

V

VDIG = 1.65V to 5.5V

High-Z state,

Leakage current

±5

µA

VOUT = 0 V to VDIG

Output capacitance

High-Z state

15

pF

DIGITAL TIMING

Bus access time

RL = 3.3 kΩ, CL = 50 pF

83

ns

Bus relinquish time

RL = 3.3 kΩ, CL = 10 pF

83

ns

POWER SUPPLIES

VDIG

Interface voltage

1.65

1.8

5.5

1.65

1.8

5.5

V

VANA

ADC core voltage

4.5

5

5.5

4.5

5

5.5

V

IDIG

Interface current

VDIG = 5 V

0.3

mA

IANA

ADC core current

VANA = 5 V

9

mA

VANA = VDIG = 5 V,

47

60

47

60

mW

fS = 200 kHz

Power dissipation

REFD high with BUF on

42

mW

PWRD and REFD high

50

µW

TEMPERATURE RANGE

Specified performance

–40

+85

–40

+85

°C

Derated performance

–55

+125

–55

+125

°C

Storage temperature

–65

+150

–65

+150

°C

TSSOP

62

θ

JA

Thermal impedance

°C/W

SO

46

(9)

TTL-compatible at 5V supply.

Table 1. Analog Input Range Connections (see Figure 38 and Figure 39)

ANALOG INPUT

RANGE

CONNECT R1IN VIA 200 Ω TO

CONNECT R2IN VIA 100 Ω TO

IMPEDANCE

±10 V

VIN

CAP

45.7 k

Ω

0 V to 5 V

AGND

VIN

20.0 k

Ω

0 V to 4 V

VIN

21.4 k

Ω

4

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