ADC-305-1 datasheet(1/6 Pages) MURATA-PS

No de pièce	ADC-305-1

Description	8-Bit, 20MHz CMOS A/D Converters

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Fabricant	MURATA-PS [Murata Power Solutions Inc.]

Site Internet	http://www.murata-ps.com

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Figure 1. Functional Block Diagram

Both the ADC-305-1 and the ADC-305-3 have the same pin assignment.

UPPER

ENCODER

(4 BIT)

24 DGND

OUTPUT ENABLE 1

A/D CLK 12

BIT 8 (LSB) 3

BIT 1 (MSB) 10

BIT 7 4

23 VRB

21 AGND

20 AGND

19 VIN

15 +AVS

14 +AVS

13 +DVS

18 +AVS

17 VRT

22 VRBS

16 VRTS

REFERENCE

VOLTAGE

B BLOCK

COMPARATORS

WITH S/H (4 BIT)

UPPER

COMPARATORS

WITH S/H (4 BIT)

LOWER

ENCODER

(4 BIT)

LOWER

ENCODER

(4 BIT)

CLOCK

GENERATOR

UPPER

DATA

LATCHES

LOWER

DATA

LATCHES

A BLOCK

COMPARATORS

WITH S/H (4 BIT)

DGND 2

+DVS 11

BIT 6 5

BIT 5 6

BIT 4 7

BIT 3 8

BIT 2 9

FEATURES

■ 8-bit resolution, 20MHz min. sampling rate

■ ±½LSB max. differential nonlinearity error

■ 18MHz input signal bandwidth

■ Subranging, S&H enclosed

■ +5V single power, low 85mW max. dissipation

■ CMOS compatible logic input

■ 3-State TTL compatible output

PRODUCT OVERVIEW

DATEL's ADC-305 is an 8-bit, 20MHz sam-

pling, CMOS, subranging (two-pass) A/D converter.

It processes signals at speeds comparable to a full

ﬂash converter by using a sub-ranging conversion

technique with multiple comparator blocks, each

containing a sample and hold ampliﬁer.

The ADC-305 features CMOS low power dis-

sipation (60mW typical) and a wide 18MHz (–1dB)

input signal bandwidth.

The ADC-305-1 is packaged in 400 mil 24-pin DIP

and the ADC-305-3 in 300 mil 24-pin SOP.

Other features are CMOS compatible input logic,

3-state TTL compatible output logic, +5V single

power operation, self bias mode and low cost.

INPUT/OUTPUT CONNECTIONS

FUNCTION

1

OUTPUT ENABLE (OE)

24

DGND

2

DGND

23

REF. BOTTOM (VRB)

3

BIT 8 (LSB)

22

SELF BIAS 1 (VRBS)

4

BIT 7

21

AGND

5

BIT 6

20

AGND

6

BIT 5

19

ANALOG INPUT (VIN)

7

BIT 4

18

+AVS (+5V)

8

BIT 3

17

REFERENCE TOP (VRT)

9

BIT 2

16

SELF BIAS 2 (VRTS)

10

BIT 1 (MSB)

15

+AVS (+5V)

11

+DVS (+5V)

14

+AVS (+5V)

12

CLOCK INPUT (A/D CLK)

13

+DVS (+5V)

ADC-305

8-Bit, 20MHz CMOS A/D Converters

MDA_ADC-305.B01 Page 1 of 6

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com

Technical enquiries email: data.acquisition@murata-ps.com, tel: +1 508 339 3000

OBSOLETE PRODUCT

Contact Factory for Replacement Model

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