AD7896BRZ datasheet(2/15 Pages) AD

Part #	AD7896BRZ

Description	2.7 V to 5.5 V, 12-Bit, 8 s ADC in 8-Lead SOIC/PDIP

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Manufacturer	AD [Analog Devices]

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AD7896–SPECIFICATIONS

(VDD = 2.7 V to 5.5 V, AGND = DGND = 0 V. All specifications TMIN to TMAX,

unless otherwise noted.)

Test Conditions/

Parameter

A Version

1

B Version

J Version

S Version Unit

Comments

DYNAMIC PERFORMANCE

2

Signal-to-(Noise + Distortion) Ratio

3

@ 25

°C70

70

70 typ

70

dB min

fIN = 10 kHz Sine Wave,

fSAMPLE = 100 kHz

TMIN to TMAX

70

dB min

Total Harmonic Distortion (THD)

3

–

–80 typ

–

dB max

fIN = 10 kHz Sine Wave,

fSAMPLE = 100 kHz

Peak Harmonic or Spurious Noise

3

–80

–80 typ

dB max

fIN = 10 kHz Sine Wave,

fSAMPLE = 100 kHz

Intermodulation Distortion (IMD)

3

fa = 9 kHz, fb = 9.5 kHz,

fSAMPLE = 100 kHz

Second Order Terms

–

–80 typ

–

dB max

Third Order Terms

–80

–80 typ

–80

dB max

DC ACCURACY

Resolution

12

Bits

Minimum Resolution for Which No

Missing Codes Are Guaranteed

12

Bits

Relative Accuracy

3

±1

±1/2

±1

±1LSB max

Differential Nonlinearity

3

±1

±1LSB max

Positive Full-Scale Error

3

±3

±1.5

±3

±3LSB max

Unipolar Offset Error

±4

±5

±4LSB max V

DD = 5 V

± 10%

±4

±3

±5

±4LSB max V

DD = 2.7 V to 3.6 V

ANALOG INPUT

Input Voltage Range

0 to +VDD

0to +VDD

0to +VDD 0 to +VDD V

Input Current

±2

±5

µA max

LOGIC INPUTS

Input High Voltage, VINH

2.0

V min

VDD = 2.7 V to 3.6 V

2.4

VDD = 5 V

± 10%

Input Low Voltage, VINL

0.8

V max

Input Current, IIN

±10

µA max

VIN = 0 V to VDD

Input Capacitance, CIN

4

10

pF max

LOGIC OUTPUTS

Output High Voltage, VOH

2.4

V min

ISOURCE = 400 A

Output Low Voltage, VOL

0.4

V max

ISINK = 1.6 mA

Output Coding

Straight (Natural) Binary

CONVERSION RATE

Conversion Time

Mode 1 Operation

8

8.5

µs max

Mode 2 Operation

5

14

14.5

µs max

Track-and-Hold Acquisition Time

3

1.5

µs max

Rev. D

77

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