AD7477AARM datasheet(4/24 Pages) AD

4 / 24 page

REV. C

–4–

AD7476A/AD7477A/AD7478A

AD7478A–SPECIFICATIONS1

(VDD = 2.35 V to 5.25 V, fSCLK = 20 MHz, fSAMPLE = 1 MSPS, unless otherwise noted;

TA = TMIN to TMAX, unless otherwise noted.)

Parameter

A Grade

Unit

Test Conditions/Comments

DYNAMIC PERFORMANCE

fIN = 100 kHz Sine Wave

Signal-to-Noise + Distortion (SINAD)

dB min

Total Harmonic Distortion (THD)

–65

dB max

Peak Harmonic or Spurious Noise (SFDR)

–65

dB max

Intermodulation Distortion (IMD)

Second-Order Terms

–76

dB typ

fa = 100.73 kHz, fb = 90.7 kHz

Third-Order Terms

–76

dB typ

fa = 100.73 kHz, fb = 90.7 kHz

Aperture Delay

ns typ

Aperture Jitter

ps typ

Full Power Bandwidth

13.5

MHz typ

@ 3 dB

MHz typ

@ 0.1 dB

Parameter

A Grade

Unit

Test Conditions/Comments

LOGIC INPUTS

Input High Voltage, VINH

2.4

V min

1.8

V min

VDD = 2.35 V

Input Low Voltage, VINL

0.8

V max

VDD = 5 V

0.4

V max

VDD = 3 V

Input Current, IIN, SCLK Pin

±0.5

µA max

Typically 10 nA, VIN = 0 V or VDD

Input Current, IIN, CS Pin

±10

nA typ

Input Capacitance, CIN

pF max

LOGIC OUTPUTS

Output High Voltage, VOH

VDD – 0.2

V min

ISOURCE = 200

µA, V

DD = 2.35 V to 5.25 V

Output Low Voltage, VOL

0.4

V max

ISINK = 200

µA

Floating-State Leakage Current

±1

µA max

Floating-State Output Capacitance

pF max

Output Coding

Straight (Natural) Binary

CONVERSION RATE

Conversion Time

700

ns max

14 SCLK Cycles with SCLK at 20 MHz

Track-and-Hold Acquisition Time

250

ns max

Throughput Rate

MSPS max

POWER REQUIREMENTS

VDD

2.35/5.25

V min/max

IDD

Digital I/Ps = 0 V or VDD

Normal Mode (Static)

2.5

mA typ

VDD = 4.75 V to 5.25 V, SCLK ON or OFF

1.2

mA typ

VDD = 2.35 V to 3.6 V, SCLK ON or OFF

Normal Mode (Operational)

3.5

mA max

VDD = 4.75 V to 5.25 V, fSAMPLE = 1 MSPS

1.7

mA max

VDD = 2.35 V to 3.6 V, fSAMPLE = 1 MSPS

Full Power-Down Mode (Static)

µA max

Typically 50 nA

Full Power-Down Mode (Dynamic)

0.6

mA typ

VDD = 5 V, fSAMPLE = 100 kSPS

0.3

mA typ

VDD = 3 V, fSAMPLE = 100 kSPS

Power Dissipation

Normal Mode (Operational)

17.5

mW max

VDD = 5 V, fSAMPLE = 1 MSPS

5.1

mW max

VDD = 3 V, fSAMPLE = 1 MSPS

Full Power-Down Mode

µW max

VDD = 5 V

NOTES

1Temperature range from –40

°C to +85°C.

2Operational from V

DD = 2.0 V, with input high voltage (VINH) 1.8 V min.

3See Terminology section.

4SC70 values guaranteed by characterization.

5Guaranteed by characterization.

6See Power vs. Throughput Rate section.

Specifications subject to change without notice.

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