EVAL-AD7791EBZ datasheet(9/21 Pages) AD

Part #	EVAL-AD7791EBZ

Description	Low Power, Buffered 24-Bit Sigma-Delta ADC

Download	21 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

Logo

9 / 21 page

AD7791

Data Sheet

Rev. A | Page 8 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

04227-0-005

AD7791

TOP VIEW

(Not to Scale)

SCLK

1

CS

2

AIN(+)

3

AIN(–)

4

REF(+)

5

DIN

DOUT/RDY

VDD

GND

REF(–)

10

9

8

7

6

Figure 5. Pin Configuration

Table 4. Pin Function Descriptions

No.

Mnemonic

Function

1

SCLK

Serial Clock Input for Data Transfers to and

from the ADC. The SCLK has a Schmitt-

triggered input, making the interface suita-

ble for opto-isolated applications. The serial

clock can be continuous with all data

transmitted in a continuous train of pulses.

Alternatively, it can be a noncontinuous

clock with the information being trans-

mitted to or from the ADC in smaller

batches of data.

2

CS

Chip Select Input. This is an active low logic

input used to select the ADC. CS can be

used to select the ADC in systems with

more than one device on the serial bus or as

a frame synchronization signal in communi-

cating with the device. CS can be hardwired

low, allowing the ADC to operate in 3-wire

mode with SCLK, DIN, and DOUT used to

interface with the device.

3

AIN(+)

Analog Input. AIN(+) is the positive terminal

of the fully differential analog input.

4

AIN(–)

Analog Input. AIN(–) is the negative termi-

nal of the fully differential analog input.

5

REFIN(+)

Positive Reference Input. REFIN(+) can lie

anywhere between VDD and GND + 0.1 V.

The nominal reference voltage (REFIN(+) –

REFIN(–)) is 2.5 V, but the part functions with

a reference from 0.1 V to VDD.

No.

Mnemonic

Function

6

REFIN(–)

Negative Reference Input. This reference

input can lie anywhere between GND and

VDD – 0.1 V.

7

GND

Ground Reference Point.

8

VDD

Supply Voltage, 2.5 V to 5.25 V.

9

DOUT/RDY

Serial Data Output/Data Ready Output.

DOUT/RDY serves a dual purpose . It functions

as a serial data output pin to access the output

shift register of the ADC. The output shift reg-

ister can contain data from any of the

on-chip data or control registers. In addition,

DOUT/RDY operates as a data ready pin,

going low to indicate the completion of a

conversion. If the data is not read after the

conversion, the pin will go high before the

next update occurs.

The DOUT/RDY falling edge can be used as an

interrupt to a processor, indicating that valid

data is available. With an external serial clock,

the data can be read using the DOUT/RDY pin.

With CS low, the data/control word informa-

tion is placed on the DOUT/RDY pin on the

SCLK falling edge and is valid on the SCLK

rising edge.

The end of a conversion is also indicated by

the RDY bit in the status register. When CS is

high, the DOUT/RDY pin is three-stated but

the RDY bit remains active.

10

DIN

Serial Data Input to the Input Shift Register

on the ADC. Data in this shift register is trans-

ferred to the control registers within

the ADC, the register selection bits of the

communications register identifying the

appropriate register.

Similar Part No. - EVAL-AD7791EBZ

Manufacturer	Part #	Datasheet	Description
Analog Devices	EVAL-AD7792EBZ1	661Kb / 32P	3-Channel, Low Noise, Low Power, 16-/24-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. B
	EVAL-AD7793EBZ1	661Kb / 32P	3-Channel, Low Noise, Low Power, 16-/24-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. B
	EVAL-AD7794EB	814Kb / 36P	6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. D
	EVAL-AD7795	1,007Kb / 16P	Evaluation Board for the AD7795 16-Bit, Low Power Sigma-Delta ADC (6 Channels) REV. 0
	EVAL-AD7795EB	814Kb / 36P	6-Channel, Low Noise, Low Power, 24-/16-Bit 誇-? ADC with On-Chip In-Amp and Reference REV. D

More results

Similar Description - EVAL-AD7791EBZ

Manufacturer	Part #	Datasheet	Description
Analog Devices	AD7791	308Kb / 20P	Low Power, Buffered 24-Bit Sigma-Delta ADC REV. 0
	AD7791	465Kb / 20P	Low Power, Buffered 24-Bit Sigma-Delta ADC REV. A
	AD7790BRMZ	415Kb / 20P	Low Power, 16-Bit Buffered Sigma-Delta ADC REV. A
	AD7790	415Kb / 20P	Low Power, 16-Bit Buffered Sigma-Delta ADC REV. A
	AD7790	466Kb / 21P	Low Power, 16-Bit Buffered Sigma-Delta ADC
	AD7790	299Kb / 20P	Low Power, 16-Bit Buffered Sigma-Delta ADC REV. 0
	AD7796	561Kb / 24P	Low Power, 16-/24-Bit Sigma-Delta ADC REV. A
	AD7797	561Kb / 24P	Low Power, 16-/24-Bit Sigma-Delta ADC REV. A
List of Unclassifed Man...	PXIE-9529	199Kb / 1P	24-Bit Sigma-Delta ADC
Core Technology (Shenzh...	CS1242	709Kb / 29P	24-bit Sigma-Delta ADC

More results

EVAL-AD7791EBZ Datasheet(PDF) 9 Page - Analog Devices

EVAL-AD7791EBZ Datasheet(HTML) 9 Page - Analog Devices

Similar Part No. - EVAL-AD7791EBZ

Similar Description - EVAL-AD7791EBZ

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Datasheet Download

Link URL