EVAL-AD7450ACB(2004) データシートの表示（PDF） - Analog Devices

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EVAL-AD7450ACB
(Rev.:2004)

Differential Input, 1 MSPS 10-Bit and 12-Bit ADCs in an 8-Lead SOT-23

Analog Devices 

AD7440/AD7450A

AD7440–SPECIFICATIONS

Table 1. VDD = 2.7 V to 3.6 V, fSCLK = 18 MHz, fS = 1 MSPS, VREF = 2.0 V; VDD = 4.75 V to 5.25 V, fSCLK = 18 MHz, fS = 1 MSPS,

VREF = 2.5 V; VCM1 = VREF; TA= TMIN to TMAX, unless otherwise noted. Temperature range for B Version –40°C to +85°C.

Parameter

Test Conditions/Comments

B Version

Unit

DYNAMIC PERFORMANCE

Signal-to-(Noise + Distortion) (SINAD)2

fIN = 100 kHz

61

dB min

Total Harmonic Distortion (THD)2

–82 dB typ

–74

dB max

Peak Harmonic or Spurious Noise2

–82 dB typ

–76

dB max

Intermodulation Distortion (IMD)2

fa = 90 kHz, fb = 110 kHz

Second-Order Terms

–83

dB typ

Third-Order Terms

–83

dB typ

Aperture Delay2

5

ns typ

Aperture Jitter2

50

ps typ

Full Power Bandwidth2, 3

@ –3 dB

20

MHz typ

@ –0.1 dB

2.5

MHz typ

DC ACCURACY

Resolution

10

Bits

Integral Nonlinearity (INL)2

±0.5

LSB max

Differential Nonlinearity (DNL)2

Guaranteed no missed codes to 10 bits

±0.5

LSB max

Zero-Code Error2

±2.5

LSB max

Positive Gain Error2

±1

LSB max

Negative Gain Error2

±1

LSB max

ANALOG INPUT

Full-Scale Input Span

2 × VREF4

VIN+ – VIN–

V

Absolute Input Voltage

VIN+

VCM = VREF

VCM ± VREF/2

V

VIN–

VCM = VREF

VCM ± VREF/2

V

DC Leakage Current

±1

µA max

Input Capacitance

When in track-and-hold

30/10

pF typ

REFERENCE INPUT

VREF Input Voltage

VDD = 4.75 V to 5.25 V (±1% tolerance for

specified performance)

2.55

V

VDD = 2.7 V to 3.6 V (±1% tolerance for specified

performance)

2.06

V

DC Leakage Current

±1

µA max

VREF Input Capacitance

When in track-and-hold

10/30

pF typ

LOGIC INPUTS

Input High Voltage, VINH

2.4

V min

Input Low Voltage, VINL

0.8

V max

Input Current, IIN

Typically 10 nA, VIN = 0 V or VDD

±1

Input Capacitance, CIN 7

10

µA max

pF max

LOGIC OUTPUTS

Output High Voltage, VOH

VDD = 4.75 V to 5.25 V; ISOURCE = 200 µA

2.8

V min

Output Low Voltage, VOL

Floating-State Leakage Current

Floating-State Output Capacitance7

Output Coding

VDD = 2.7 V to 3.6 V; ISOURCE = 200 µA

ISINK = 200 µA

2.4

0.4

±1

10

Twos Complement

V min

V max

µA max

pF max

Rev. B | Page 3 of 28

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