AD7883 datasheet(2/12 Pages) AD

2 / 12 page

REV. 0

–2–

AD7883–SPECIFICATIONS (V

DD = +3 V to +3.6 V, VREF = VDD, AGND = DGND = 0 V, fCLKIN = 2 MHz,

MODE = Logic High. All specifications TMIN to TMAX unless othewise noted.)

Parameter

B Versions

Units

Test Conditions/Comments

DYNAMIC PERFORMANCE

Signal-to-Noise Ratio

3 (SNR)

dB min

Typically SNR Is 71 dB

VIN = 1 kHz Sine Wave, fSAMPLE = 50 kHz

Total Harmonic Distortion (THD)

–80

dB typ

VIN = 1 kHz Sine Wave, fSAMPLE = 50 kHz

Peak Harmonic or Spurious Noise

–80

dB typ

VIN = 1 kHz, fSAMPLE = 50 kHz

Intermodulation Distortion (IMD)

Second Order Terms

–80

dB typ

fa = 0.983 kHz, fb = 1.05 kHz, fSAMPLE = 50 kHz

Third Order Terms

–80

dB typ

fa = 0.983 kHz, fb = 1.05 kHz, fSAMPLE = 50 kHz

DC ACCURACY

Resolution

Bits

All DC ACCURACY Specifications Apply for the Two

Analog Input Ranges

Integral Nonlinearity

±2

LSB max

Differential Nonlinearity

±1

LSB max

Guaranteed Monotonic

Full-Scale Error

±20

LSB max

Bipolar Zero Error

±12

LSB max

Unipolar Offset Error

±3

LSB max

ANALOG INPUT

Input Voltage Ranges

0 to VREF

Volts

See Figure 4

±V

REF

Volts

See Figure 5

Input Resistance

Ω min

0 to VREF Range

5/12

Ω min/max

8 k

Ω typical: ±V

REF Range

REFERENCE INPUT

VREF (For Specified Performance)

VDD

IREF

1.2

mA max

LOGIC INPUTS

CONVST

, RD, CS, CLKIN

Input High Voltage, VINH

2.1

V min

Input Low Voltage, VINL

0.6

V max

Input Current, IIN

±10

µA max

VIN = 0 V or VDD

Input Capacitance, C

pF max

MODE INPUT

Input High Voltage, VINH

VDD –0.2

Input Low Voltage, VINL

0.2

Input Current, IIN

±100

µA max

VIN = 0 V or VDD

Input Capacitance, C

pF max

LOGIC OUTPUTS

DB11–DB0, BUSY

Output High Voltage, VOH

2.4

V min

ISOURCE = 200 µA

Output Low Voltage, VOL

0.4

V max

ISINK = 0.8 mA

DB11–DB0

Floating-State Leakage Current

±10

µA max

Floating-State Output Capacitance

pF max

CONVERSION

Conversion Time

µs max

fCLKIN = 2 MHz

Track/Hold Acquisition Time

µs max

POWER REQUIREMENTS

VDD

+3.3

V nom

+3 V to +3.6 V for Specified Performance

IDD

Normal Power Mode @ +25

°C

mA max

Typically 2 mA; MODE = VDD

TMIN to TMAX

mA max

Typically 2.5 mA; MODE = VDD

Power Save Mode @ +25

°C

400

µA max

Logic Inputs @ 0 V or VDD; MODE = 0 V; Typically 250 µA

TMIN to TMAX

800

µA max

Logic Inputs @ 0 V or VDD; MODE = 0 V; Typically 300 µA

Power Dissipation

Normal Power Mode @ +25

°C

mW max

VDD = 3.6 V: Typically 8 mW; MODE = VDD

TMIN to TMAX

mW max

VDD = 3.6 V: Typically 9 mW; MODE = VDD

Power Save Mode @ +25

°C

1.5

mW max

VDD = 3.6 V: Typically 1 mW; MODE = 0 V

TMIN to TMAX

mW max

VDD = 3.6 V: Typically 1 mW; MODE = 0 V

NOTES

1Temperature range is as follows: B Versions, –40

°C to +85°C.

IN = 0 to VREF.

3SNR calculation includes distortion and noise components.

4Sample tested @ +25

°C to ensure compliance.

Specifications subject to change without notice.

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