AD7476AYRM 查看數據表（PDF） - Analog Devices

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AD7476AYRM

2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70

Analog Devices 

AD7476A/AD7477A/AD7478A –Typical Performance Characteristics

TPC 1, TPC 2, and TPC 3 each show a typical FFT plot for the

AD7476A, AD7477A, and AD7478A, respectively, at a 1 MSPS

sample rate and 100 kHz input frequency.

TPC 4 shows the signal-to-(noise + distortion) ratio performance

versus the input frequency for various supply voltages while sampling

at 1 MSPS with an SCLK frequency of 20 MHz for the AD7476A.

TPC 5 and TPC 6 show INL and DNL performance for the

AD7476A.

TPC 7 shows a graph of the total harmonic distortion versus the

analog input frequency for different source impedances when

using a supply voltage of 3.6 V and sampling at a rate of 1 MSPS

(see Analog Input section).

TPC 8 shows a graph of the total harmonic distortion versus the

analog input signal frequency for various supply voltages while

sampling at 1 MSPS with an SCLK frequency of 20 MHz.

5

8192 POINT FFT

VDD = 2.7V

–15

fSAMPLE = 1MSPS

fIN = 100kHz

SINAD = 72.05dB

–35

THD = –82.87dB

SFDR = –87.24dB

–55

–75

–95

–115

0

50 100 150 200 250 300 350 400 450 500

FREQUENCY – kHz

TPC 1. AD7476A Dynamic Performance at 1 MSPS

8192 POINT FFT

VDD = 2.35V

–5

fSAMPLE = 1MSPS

fIN = 100kHz

SINAD = 61.67dB

–25

THD = –79.59dB

SFDR = –82.93dB

–45

–65

–85

–105

0

50 100 150 200 250 300 350 400 450 500

FREQUENCY – kHz

TPC 2. AD7477A Dynamic Performance at 1 MSPS

5

–5

8192 POINT FFT

VDD = 2.35V

–15

fSAMPLE = 1MSPS

fIN = 100kHz

–25

SINAD = 49.77dB

THD = –75.51dB

–35

SFDR = –70.71dB

–45

–55

–65

–75

–85

–95

0

50 100 150 200 250 300 350 400 450 500

FREQUENCY – kHz

TPC 3. AD7478A Dynamic Performance at 1 MSPS

–66

–67

–68

–69

VDD = 2.7V

–70

VDD = 2.35V

–71

VDD = 5.25V

–72

–73

–74

10

VDD = 4.75V

VDD = 3.6V

100

FREQUENCY – kHz

1000

TPC 4. AD7476A SINAD vs. Input Frequency at 1 MSPS

–12–

REV. C

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