AD7812YRU datasheet(5/19 Pages) AD

部品番号	AD7812YRU

部品情報	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs

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メーカー	AD [Analog Devices]

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AD7811/AD7812

–5–

REV. B

PIN FUNCTION DESCRIPTIONS

Pin(s)

AD7811

AD7812

Mnemonic

Description

11

VREF

An external reference input can be applied here. When using an external precision

reference or VDD the EXTREF bit in the control register must be set to logic one. The

external reference input range is 1.2 V to VDD.

22

CREF

Reference Capacitor. A capacitor (10 nF) is connected here to improve the noise

performance of the on-chip reference.

3, 5–7

3, 5–11

VIN1–VIN4(8)

Analog Inputs. The analog input range is 0 V to VREF.

4

AGND

Analog Ground. Ground reference for track/hold, comparator, on-chip reference and

DAC.

8

12

A0

Package Address Pin. This Logic Input can be hardwired high or low. When used in

conjunction with the package address bit in the control register this input allows two

devices to share the same serial bus. For example a twelve channel solution can be

achieved by using the AD7811 and the AD7812 on the same serial bus.

9

13

DGND

Digital Ground. Ground reference for digital circuitry.

10

14

TFS

Transmit Frame Sync. The falling edge of this Logic Input tells the part that a new

control byte should be shifted in on the next 10 falling edges of SCLK.

11

15

RFS

Receive Frame Sync. The rising edge of this Logic Input is used to enable a counter in

the serial interface. It is used to provide compatibility with DSPs which use a continuous

serial clock and framing signal. In multipackage applications the RFS Pin can also be

used as a serial bus select pin. The serial interface will ignore the SCLK until it receives a

rising edge on this input. The counter is reset at the end of a serial read operation.

12

16

DOUT

Serial Data Output. Serial data is shifted out on this pin on the rising edge of the serial

clock. The output enters a High impedance condition on the rising edge of the 11th

SCLK pulse.

13

17

DIN

Serial Data Input. The control byte is read in at this input. In order to complete a

serial write operation 13 SCLK pulses need to be provided. Only the first 10 bits are

shifted in—see Serial Interface section.

14

18

SCLK

Serial Clock Input. An external serial clock is applied to this input to obtain serial data

from the AD7811/AD7812 and also to latch data into the AD7811/AD7812. Data is

clocked out on the rising edge of SCLK and latched in on the falling edge of SCLK.

15

19

CONVST

Convert Start. This is an edge triggered logic input. The Track/Hold goes into its Hold

Mode on the falling edge of this signal and a conversion is initiated. The state of this

pin at the end of conversion also determines whether the part is powered down or not.

See operating modes section of this data sheet.

16

20

VDD

Positive Supply Voltage 2.7 V to 5.5 V.

PIN CONFIGURATIONS

DIP/SOIC/TSSOP

14

13

12

11

16

15

10

9

8

1

2

3

4

7

6

5

TOP VIEW

(Not to Scale)

AD7811

VREF

DIN

SCLK

CONVST

VDD

CREF

VIN1

AGND

TFS

RFS

DOUT

VIN2

VIN3

VIN4

A0

DGND

14

13

12

11

17

16

15

20

19

18

10

9

8

1

2

3

4

7

6

5

TOP VIEW

(Not to Scale)

AD7812

VREF

DIN

SCLK

VDD

CREF

VIN1

AGND

TFS

RFS

DOUT

VIN2

VIN3

VIN4

VIN5

VIN6

VIN7

VIN8

A0

DGND

CONVST

同様の部品番号 - AD7812YRU

メーカー	部品番号	データシート	部品情報
Analog Devices	AD7812YRU	200Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7812YRU	198Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7812YRU	198Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7812YRU	211Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7812YRUZ	198Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B

More results

同様の説明 - AD7812YRU

メーカー	部品番号	データシート	部品情報
Analog Devices	AD7811	200Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7812YRUZ	211Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7812YRUZ	198Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7811	333Kb / 24P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. C
	AD7812	333Kb / 24P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. C
	AD7811YRUZ	198Kb / 19P	2.7 V to 5.5 V, 350 kSPS, 10-Bit 4-/8-Channel Sampling ADCs REV. B
	AD7813	194Kb / 11P	2.7 V to 5.5 V, 400 kSPS 8-/10-Bit Sampling ADC REV. C
	AD7813YNZ	174Kb / 11P	2.7 V to 5.5 V, 400 kSPS 8-/10-Bit Sampling ADC REV. C
	AD7813	219Kb / 12P	2.7 V to 5.5 V, 400 kSPS 8-/10-Bit Sampling ADC
	AD7813	185Kb / 11P	2.7 V to 5.5 V, 400 kSPS 8-/10-Bit Sampling ADC REV. B

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