AD7674 查看數據表（PDF） - Analog Devices

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AD7674

16-Bit, 570 kSPS CMOS ADC

Analog Devices 

ABSOLUTE MAXIMUM RATINGS1

Analog Inputs

IND2, INC2, INB2 . . . . . . . . . . . . . . . . . . . . –11 V to +30 V

INA, REF, INGND, REFGND

. . . . . . . . . . . . . . . . . . . . . AGND – 0.3 V to AVDD + 0.3 V

Ground Voltage Differences

AGND, DGND, OGND . . . . . . . . . . . . . . . . . . . . . ±0.3 V

Supply Voltages

AVDD, DVDD, OVDD . . . . . . . . . . . . . . . . –0.3 V to + 7 V

AVDD to DVDD, AVDD to OVDD . . . . . . . . . . . . . . ±7 V

DVDD to OVDD . . . . . . . . . . . . . . . . . . . . . –0.3 V to + 7 V

Digital Inputs . . . . . . . . . . . . . . . . –0.3 V to DVDD + 0.3 V

Internal Power Dissipation3 . . . . . . . . . . . . . . . . . . . . 700 mW

Internal Power Dissipation4 . . . . . . . . . . . . . . . . . . . . . . 2.5 W

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range

(Soldering 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C

1Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the

device at these or any other conditions above those indicated in the operational

section of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

2See Analog Inputs section.

3Specification is for device in free air: 48-Lead LQFP: qJA = 91°C/W, qJC = 30°C/W.

4Specification is for device in free air: 48-Lead LFCSP: qJC = 26°C/W.

1.6mA IOL

TO OUTPUT

1.4V

PIN

CL

60pF*

500␮A IOH

*IN SERIAL INTERFACE MODES, THE SYNC, SCLK, AND

SDOUT TIMINGS ARE DEFINED WITH A MAXIMUM LOAD

CL OF 10pF; OTHERWISE, THE LOAD IS 60pF MAXIMUM.

Figure 1. Load Circuit for Digital Interface Timing, SDOUT,

SYNC, SCLK Outputs, CL = 10 pF

AD7665

PIN CONFIGURATION

ST-48 and CP-48

48 47 46 45 44 43 42 41 40 39 38 37

AGND 1

AVDD 2

NC 3

BYTESWAP 4

OB/2C 5

WARP 6

IMPULSE 7

SER/PAR 8

D0 9

D1 10

D2/DIVSCLK[0] 11

D3/DIVSCLK[1] 12

PIN 1

IDENTIFIER

AD7665

TOP VIEW

(Not to Scale)

36 AGND

35 CNVST

34 PD

33 RESET

32 CS

31 RD

30 DGND

29 BUSY

28 D15

27 D14

26 D13

25 D12

NC = NO CONNECT

13 14 15 16 17 18 19 20 21 22 23 24

The exposed paddle should be connected to GND.

0.8V

tDELAY

2V

0.8V

2V

tDELAY

2V

0.8V

Figure 2. Voltage Reference Levels for Timing

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection. Although

the AD7665 features proprietary ESD protection circuitry, permanent damage may occur on

devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are

recommended to avoid performance degradation or loss of functionality.

REV. C

–5–

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