AD7991 datasheet(7/25 Pages) AD

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Preliminary Technical Data

AD7991/AD7995/AD7999

Rev. PrB | Page 7 of 25

AD7999 SPECIFICATIONS

Temperature range for Y version is −40°C to +125°C. Unless otherwise noted, VDD = 2.7 V to 5.5 V; fSCL = 3.4 Mhz Unless otherwise noted;

TA = TMIN to TMAX.

Table 4.

Parameter

Y Version

Unit

Test Conditions/Comments

DYNAMIC PERFORMANCE1

FIN = 10 kHz sine wave for fSCL from 1.7 MHz to

3.4 MHz

FIN = 1 kHz sine wave for fSCL up to 400 kHz

Signal-to-Noise + Distortion (SINAD)2

dB min

Total Harmonic Distortion (THD)2

–65

dB max

Peak Harmonic or Spurious Noise (SFDR)2

–65

dB max

Intermodulation Distortion (IMD)2

fa = 10.1 kHz, fb = 9.9 kHz for fSCL from 1.7 MHz

to 3.4 MHz

fa = 1.1 kHz, fb = 0.9 kHz for fSCL up to 400 kHz

Second Order Terms

–76

dB typ

Third Order Terms

–76

dB typ

Channel-to-Channel Isolation2

-90

dB typ

FIN = 108 Hz; see the Terminology section

Full Power Bandwidth2

MHz typ

@ 3 dB

MHz typ

@ 0.1 dB

DC ACCURACY

Resolution

Bits

Integral Nonlinearity1, 2

±0.3

LSB max

Differential Nonlinearity1, 2

±0.3

LSB max

Guaranteed no missed codes to 8 bits

Offset Error2

±0.5

LSB max

Offset Error Matching

±0.3

LSB max

Offset Temperature drift

TBD

ppm/°C typ

Gain Error2

±0.3

LSB max

Gain Error Matching

±0.3

LSB max

Gain Temperature drift

TBD

ppm/°C typ

ANALOG INPUT

Input Voltage Range

0 to REFIN

When Vin3/VREF = VIN3, Vref = VDD

DC Leakage Current

±1

µA max

Input Capacitance

pF typ

REFERENCE INPUT

REFIN Input Voltage Range

1.2 to VDD

V min/V max

DC Leakage Current

±1

µA max

REFIN Input Capacitance

pF typ

Input Impedance

kΩ typ

LOGIC INPUTS (SDA, SCL)

Input High Voltage, VINH

0.7 (VDD)

V min

Input Low Voltage, VINL

0.3 (VDD)

V max

Input Leakage Current, IIN

±1

µA max

VIN = 0 V or VDD

Input Capacitance, CIN3

pF max

Input Hysteresis, VHYST

0.1 (VDD)

V min

LOGIC OUTPUTS (OPEN DRAIN)

Output Low Voltage, VOL

0.4

V max

ISINK = 3 mA

0.6

V max

ISINK = 6 mA

Floating-State Leakage Current

±1

µA max

Floating-State Output Capacitance3

pF max

Output Coding

Straight (Natural) Binary

THROUGHPUT RATE

See the Serial Interface section

18 * (1/fSCL)

us max

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