ADS8342

SBAS277 – MAY 2003

www.ti.com

4

ELECTRICAL CHARACTERISTICS

Over recommended operating free-air temperature range at –40

°C to +85°C, ±AVDD =±DVDD =±5V, BVDD = +5V, VREF = +2.5V, fCLK = 5MHz, and

fSAMPLE = 250kSPS, unless otherwise noted.

PARAMETER

TEST CONDITIONS

ADS8342I

ADS8342IB

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP(1)

MAX

MIN

TYP(1)

MAX

UNIT

Analog Input

Full-scale range (FSR)

AIN to Common

–VREF

+VREF

:

:

V

Input MUX on-resistance

Common = AGND

500

:

Ω

Input capacitance

Common = AGND

20

:

pF

Input leakage current

Common = AGND

±0.3

:

µA

Full power bandwidth

FS sinewave, –3dB

16

:

MHz

Voltage Accuracy

Resolution

16

:

Bits

No missing code

(NMC)

15

16

Bits

Integral linearity error (INL)

–6

±3

+6

–4

±2

+4

LSB

Differential nonlinearity (DNL)

–2

±1

+2

–1

±0.6

+1.5

LSB

Bipolar zero (offset) error (VOS)

AIN = Common = 0V

–2

+2

–1

+1

mV

Bipolar zero (offset) error drift (TCVOS)

AIN = Common = 0V

1

:

ppm/

°C

Bipolar zero (offset) error match

AIN = Common = 0V

0.150

1

:

:

mV

Positive gain error (PGERR)

AIN = VREF, Common = 0V

–0.25

+0.25

:

:

% FSR

Positive gain error drift (TCPGERR)

AIN = VREF, Common = 0V

1.5

:

ppm/

°C

Positive gain error match

AIN = VREF, Common = 0V

0.003

0.01

:

:

% FSR

Negative gain error (NGERR)

AIN = –VREF, Common = 0V

–0.25

+0.25

:

:

% FSR

Negative gain error drift (TCNGERR)

AIN = –VREF, Common = 0V

1.5

:

ppm/

°C

Negative gain error match

AIN = –VREF, Common = 0V

0.003

0.01

:

:

% FSR

Sampling Dynamics

Conversion time (tCONV)

500kHz

≤ fCLK ≤ 5MHz

3.4

34

:

:

µs

Acquisition time (tACQ)

fCLK = 5MHz

0.6

:

:

µs

Throughput rate

250

:

kHz

Multiplexer settling time

150

:

ns

Aperture delay

8

:

ns

Aperture jitter

50

:

ps

AC Accuracy

Total haromonic distortion (THD)

VIN = ±2.5Vp–p at 10kHz

–89

:

dB

Spurious-free dynamic range (SFDR)

VIN = ±2.5Vp–p at 10kHz

92

:

dB

Signal-to-noise ratio (SNR)

VIN = ±2.5Vp–p at 10kHz

86

:

dB

Signal-to-noise + distortion (SINAD)

VIN = ±2.5Vp–p at 10kHz

84.6

:

dB

Channel-to-channel isolation(2)

VIN = ±2.5Vp–p at 50kHz

95

:

dB

Effective number of bits (ENOB)

14

:

Bits

(1) All typical values are at TA = +25°C.

(2) Ensured by design.

(3) Applies for 5.0V nominal supply: BVDD (min) = 4.5V and BVDD (max) = 5.5V.

(4) Applies for 3.0V nominal supply: BVDD (min) = 2.7V and BVDD (max) = 3.6V.