ADS8507 datasheet(3/32 Pages) BURR-BROWN

부품명	ADS8507

상세설명	16-BIT 40-KSPS LOW POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PARALLEL/SERIAL INTERFACE

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ADS8507

SLAS381 – DECEMBER 2006

ELECTRICAL CHARACTERISTICS (continued)

At T

A = -40°C to 85°C, fS = 40 kHz, VDIG = VANA = 5 V, and using internal reference and fixed resistors, (see Figure 43)

unless otherwise specified.

ADS8507I

ADS8507IB

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

DNL

Differential linearity error

-2

3

-1

1.5

LSB

No missing codes

15

16

Bits

Transition noise(2)

0.8

LSB

Gain Error

±0.2

±0.1

%

Full scale error(3)(4)

-0.5

0.5

-0.25

0.25

%

Full scale error drift

±7

±5

ppm/°C

Full scale error(3)(4)

Ext. 2.5-V Ref

-0.5

0.5

-0.25

0.25

%

Full scale error drift

Ext. 2.5-V Ref

±0.5

ppm/°C

Bipolar zero error(3)

±10 V Range

-10

10

-5

5

mV

Bipolar zero error drift

±10 V Range

±0.5

ppm/°C

Unipolar zero error(5)

0 V to 5 V, 0 V to 4 V Ranges

-3

3

-3

3

mV

Unipolar zero error drift

0 V to 5 V, 0 V to 4 V Ranges

±0.5

ppm/°C

Recovery time to rated accuracy from

2.2-µF Capacitor to CAP

1

ms

power down(6)

Power supply sensitivity

+4.75 V < VS < +5.25 V

±8

LSB

(VDIG = VANA = VS)

AC ACCURACY

SFDR

Spurious-free dynamic range

fIN = 1 kHz, ±10 V

90

100

96

102

dB(7)

THD

Total harmonic distortion

fIN = 1 kHz, ±10 V

-100

-90

-100

-96

dB

fIN = 1 kHz, ±10 V

83

88

87

89.9

SINAD

Signal-to-(noise+distortion)

dB

-60 dB Input

30

32

SNR

Signal-to-noise

83

88

87

89.9

dB

Usable bandwidth(8)

fIN = 1 kHz, ±10 V

130

kHz

Full-power bandwidth (-3 dB)

600

kHz

SAMPLING DYNAMICS

Aperture delay

40

ns

Aperture jitter

20

ps

Transient response

FS Step

5

µs

Overvoltage recovery(9)

750

ns

REFERENCE

Internal reference voltage

No load

2.48

2.5

2.52

2.48

2.5

2.52

V

Internal reference source current (must

1

µA

use external buffer)

Internal reference drift

8

ppm/°C

External reference voltage range for

2.3

2.5

2.7

2.3

2.5

2.7

V

specified linearity

External reference current drain

Ext. 2.5-V Ref

100

µA

DIGITAL INPUTS

VIL

Low-level input voltage

-0.3

+0.8

-0.3

+0.8

V

VIH

High-level input voltage

2.0

VD +0.3 V

2.0

VD +0.3 V

V

IIL

Low-level input current

VIL = 0 V

±10

µA

(2)

Typical rms noise at worst case transitions.

(3)

As measured with fixed resistors, see Figure 43. Adjustable to zero with external potentiometer.

(4)

Full scale error is the worst case of -Full Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by

the transition voltage (not divided by the full-scale range) and includes the effect of offset error.

(5)

As measured with fixed resistors, see Figure 43. Adjustable to zero with external potentiometer.

(6)

This is the time delay after the ADS8507 is brought out of Power-Down mode until all internal settling occurs and the analog input is

acquired to rated accuracy. A Convert command after this delay will yield accurate results.

(7)

All specifications in dB are referred to a full-scale input.

(8)

Usable bandwidth defined as full-scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60 dB.

(9)

Recovers to specified performance after 2 x FS input overvoltage.

3

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