ADS7818E datasheet(2/13 Pages) BURR-BROWN

Part #	ADS7818E

Description	2SC5161

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Manufacturer	BURR-BROWN [Burr-Brown (TI)]

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®

ADS7818

SPECIFICATIONS

At TA = –40°C to +85°C, +VCC = +5V, fSAMPLE = 500kHz, fCLK = 16 • fSAMPLE, internal reference, unless otherwise specified.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN

assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject

to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not

authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

ADS7818P, E

ADS7818PB, EB

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

ANALOG INPUT

Full-Scale Input Span(1)

+In – (–In)

0

5

TT

V

Absolute Input Range

+In

–0.2

VCC +0.2

TT

V

–In

–0.2

+0.2

TT

V

Capacitance

15

T

pF

Leakage Current

1

T

µA

SYSTEM PERFORMANCE

Resolution

12

T

Bits

No Missing Codes

12

T

Bits

Integral Linearity Error

±1

±2

±0.5

±1

LSB(2)

Differential Linearity Error

±0.8

±0.5

±1

LSB

Offset Error

±2

±5

±1

T

LSB

Gain Error(3)

25

°C

±12

±30

±7

±15

LSB

–40

°C to +85°C

±50

±35

LSB

Common-Mode Rejection

DC, 0.2Vp-p

70

T

dB

1MHz, 0.2Vp-p

50

T

dB

Noise

150

T

µVrms

Power Supply Rejection

Worst Case

∆, +V

CC = 5V ±5%

1.2

T

LSB

SAMPLING DYNAMICS

Conversion Time

1.625

T

µs

Acquisition Time

0.350

T

µs

Throughput Rate

500

T

kHz

Aperture Delay

5

T

ns

Aperture Jitter

30

T

ps

Step Response

350

T

ns

DYNAMIC CHARACTERISTICS

Signal-to-Noise Ratio

VIN = 5Vp-p at 100kHz

72

T

dB

Total Harmonic Distortion(4)

VIN = 5Vp-p at 100kHz

–78

–72

–82

–75

dB

Signal-to-(Noise+Distortion)

VIN = 5Vp-p at 100kHz

68

70

72

dB

Spurious Free Dynamic Range

VIN = 5Vp-p at 100kHz

72

78

75

82

dB

Usable Bandwidth

SINAD > 68dB

350

T

kHz

REFERENCE OUTPUT

Voltage

IOUT = 0

2.475

2.50

2.525

2.48

T

2.52

V

Source Current(5)

Static Load

50

T

µA

Drift

IOUT = 0

20

T

ppm /

°C

Line Regulation

4.75V

≤ V

CC ≤ 5.25V

0.6

T

mV

REFERENCE INPUT

Range

2.0

2.55

TT

V

Resistance(6)

to Internal Reference Voltage

10

TT

T

k

Ω

DIGITAL INPUT/OUTPUT

Logic Family

CMOS

T

Logic Levels:

VIH

|IIH| ≤ +5µA

3.0

VCC +0.3

TT

V

VIL

|IIL| ≤ +5µA

–0.3

0.8

TT

V

VOH

IOH = –500µA

3.5

TT

V

VOL

IOL = 500µA

0.4

TT

V

Data Format

Straight Binary

T

POWER SUPPLY REQUIREMENT

+VCC

Specified Performance

4.75

5.25

TT

V

Quiescent Current

fSAMPLE = 500kHz

2.2

T

mA

Power Down

0.5

T

mA

Power Dissipation

fSAMPLE = 500kHz

11

20

TT

mW

Power Down

2.5

T

mW

TEMPERATURE RANGE

Specified Performance

–40

+85

TT

°C

T Specifications same as ADS7818P,E.

NOTES: (1) Ideal input span, does not include gain or offset error. (2) LSB means Least Significant Bit, with VREF equal to +2.5V, one LSB is 1.22mV. (3) Measured

relative to an ideal, full-scale input (+In – (–In)) of 4.999V. Thus, gain error includes the error of the internal voltage reference. (4) Calculated on the first nine

harmonics of the input frequency. (5) If the internal reference is required to source current to an external load, the reference voltage will change due to the internal

10k

Ω resistor. (6) Can vary ±30%.

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