AD7896 datasheet(2/12 Pages) AD

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ABJ

Parameter

Versions

Version

Units

Test Conditions/Comments

DYNAMIC PERFORMANCE

Signal to (Noise + Distortion) Ratio

@ +25

°C

70 typ

dB min

fIN =10 kHz Sine Wave, fSAMPLE = 100 kHz

TMIN to TMAX

dB min

Total Harmonic Distortion (THD)

–80

–80 typ

–80

dB max

fIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz

Peak Harmonic or Spurious Noise

–80

–80 typ

dB max

fIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz

Intermodulation Distortion (IMD)

fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 100 kHz

2nd Order Terms

–80

–80 typ

–80

dB max

3rd Order Terms

–80

–80 typ

–80

dB max

DC ACCURACY

Resolution

Bits

Minimum Resolution for which No

Missing Codes are Guaranteed

Bits

Relative Accuracy

±1

±1/2

±1

LSB max

Differential Nonlinearity

±1

LSB max

Positive Full-Scale Error

±3

±1.5

±3

LSB max

Unipolar Offset Error

±4

±5

±4

LSB max

VDD = 5 V ± 10%

±4

±3

±5

±4

LSB max

VDD = 2.7 V to 3.6 V

ANALOG INPUT

Input Voltage Range

0 to +VDD 0to+VDD 0to+VDD 0 to +VDD Volts

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

pF max

LOGIC OUTPUTS

Output High Voltage, VOH

2.4

V min

ISOURCE = 2 mA

Output Low Voltage, VOL

0.4

V max

ISINK = 2 mA

Output Coding

Straight (Natural) Binary

CONVERSION RATE

Conversion Time:

Mode 1 Operation

8888.5

µs max

Mode 2 Operation

14.5

µs max

Track/Hold Acquisition Time

1.5

µs max

POWER REQUIREMENTS

VDD

+2.7/+5.5 +2.7/+5.5 +2.7/+5.5 +2.7/+5.5 V min/max

IDD

4444mA max

Digital Input @ DGND, VDD = 2.7 V to

3.6 V

5555mA max

Digital Inputs @ DGND, VDD = 5 V ± 10%

Power Dissipation

10.8

mW max

VDD = 2.7 V, Typically 9 mW

Power-Down Mode

Digital Inputs @ DGND

IDD @ +25°C

555

µA typ

µA max

VDD = 2.7 V to 3.6 V

TMIN to TMAX

µA max

VDD = 2.7 V to 3.6 V

IDD @ +25°C

50505050

µA max

VDD = 5 V ± 10%

TMIN to TMAX

150

500

µA max

VDD = 5 V ± 10%

Power Dissipation @ +25

°C

13.5

µW max

VDD = 2.7 V

NOTES

1Temperature ranges are as follows: A, B Versions: –40

°C to +85°C; J Version: 0°C to +70°C; S Version: –55°C to +125°C.

2Applies to Mode 1 operation. See section on operating modes.

3See Terminology.

4Sample tested @ +25

°C to ensure compliance.

5This 14

µs includes the “wake-up” time from standby. This “wake-up” time is timed from the rising edge of CONVST, whereas conversion is timed from the

falling edge of CONVST, for narrow CONVST pulse width the conversion time is effectively the “wake-up” time plus conversion time hence 14

µs. This can be

seen from Figure 3. Note that if the CONVST pulse width is greater than 6

µs then the effective conversion time will increase beyond 14 µs.

Specifications subject to change without notice.

REV. B

–2–

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

unless otherwise noted)

AD7896–SPECIFICATIONS

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