EVAL-AD7763EB View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

EVAL-AD7763EB

24-Bit, 625 kSPS, 109 dB Σ-Δ ADC with On-Chip Buffers, Serial Interface

Analog Devices 

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AD7763

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

DGND 1

MCLKGND 2

MCLK 3

AVDD2 4

AGND2 5

AVDD1 6

AGND1 7

DECAPA 8

REFGND 9

VREF+ 10

AGND4 11

AVDD4 12

AGND2 13

AVDD2 14

AVDD2 15

AGND2 16

PIN 1

48 ADR0

47 ADR1

46 ADR2

45 SH0

44 VDRIVE

43 DGND

AD7763

TOP VIEW

(Not to Scale)

42 DGND

41 DVDD

40 SH1

39 SH2

38 DRDY

37 RESET

36 SYNC

35 DGND

34 AGND1

33 AVDD1

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Data Sheet

NOTES

1. CONNECT THE EXPOSED PAD TO AGNDx WITH SIX TO EIGHT VIAS.

Figure 5. Pin Configuration

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

6, 33

AVDD1

4, 14, 15, 27

AVDD2

24

AVDD3

12

AVDD4

7, 34

5, 13, 16, 18, 28

23, 29, 31, 32

11

9

41

AGND1

AGND2

AGND3

AGND4

REFGND

DVDD

44, 63

VDRIVE

1, 35, 42, 43, 53, 57, 59,

62, 64

19

20

21

22

25

26

10

DGND

VINA+

VINA−

VOUTA−

VOUTA+

VIN+

VIN−

VREF+

Description

Power Supply for Modulator, 2.5 V. These pins should be decoupled to AGND1 with 100 nF and

10 µF capacitors on each pin.

Power Supply, 5 V. These pins should be decoupled to AGND2 with 100 nF capacitors on each of

Pin 4, Pin 14, and Pin 15. Pin 27 should be connected to Pin 14 via an 8.2 nH inductor.

Power Supply for Differential Amplifier, 3.3 V to 5 V. This pin should be decoupled to AGND3

with a 100 nF capacitor.

Power Supply for Reference Buffer, 3.3 V to 5 V. This pin should be decoupled to AGND4

with a 10 nF capacitor in series with a 10 Ω resistor.

Power Supply Ground for Analog Circuitry Powered by AVDD1.

Power Supply Ground for Analog Circuitry Powered by AVDD2.

Power Supply Ground for Analog Circuitry Powered by AVDD3.

Power Supply Ground for Analog Circuitry Powered by AVDD4.

Reference Ground. Ground connection for the reference voltage.

Power Supply for Digital Circuitry and FIR Filter, 2.5 V. This pin should be decoupled to DGND

with a 100 nF capacitor.

Logic Power Supply Input, 1.8 V to 2.5 V. The voltage supplied at these pins determines

the operating voltage of the logic interface. These pins must be connected together and

tied to the same supply. Each pin should also be decoupled to DGND with a 100 nF capacitor.

Ground Reference for Digital Circuitry.

Positive Input to Differential Amplifier.

Negative Input to Differential Amplifier.

Negative Output from Differential Amplifier.

Positive Output from Differential Amplifier.

Positive Input to the Modulator.

Negative Input to the Modulator.

Reference Input. The input range of this pin is determined by the reference buffer

supply voltage (AVDD4). See the Reference Voltage Filtering section for more details.

Rev. B | Page 8 of 32

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