ADS-325A Datasheet PDF - Murata Power Solutions

ADS-325A View Datasheet(PDF) - Murata Power Solutions

Part Name

Description

Manufacturer

ADS-325A

10-Bit, 20MHz Sampling A/D Converter

Murata Power Solutions

ADS-325A Datasheet PDF : 8 Pages

1 2 3 4 5 6 7 8

INN O VAT IO N a n d E X C E L L E N C E

FEATURES

• 10-bit, 20MHz sampling

• ±1LSB max. differential nonlinearity

• Internal calibration circuit

• Internal S/H amplifier

• 70MHz input bandwidth

• TTL/CMOS compatible in-out logic

• Latched three-state output data

• Single +5V supply

• Low 150mW power dissipation

• Small 48 pin LQFP package

• Low cost

GENERAL DESCRIPTION

DATEL's ADS-325A is a low power, 10-bit, 20MHz, CMOS

sampling A/D converter. Its small 48 pin plastic LQFP package

contains a S/H amplifier, a 3-state output register, linearity

calibration circuitry, and all necessary control logic. Only two

external reference voltages, an A/D clock and a few digital

inputs are required. The A/D clock may be applied with 50%

duty cycle.

The excellent dynamic performance includes a spurious free

dynamic range of 65dB and a signal-to-noise ratio with

distortion of 54dB with a 3MHz input. ADS-325A is capable of

operating from a single +5V power supply and typically

consumes only 150mW. It can also operate from a +5V analog

VS with +3.3V digital VS enabling an interface with 3.3V logic

circuitry. The ADS-325A is ideally suited for high quality video/

CCD imaging applications.

ADS-325A

10-Bit, 20MHz

Sampling A/D Converter

INPUT/OUTPUT CONNECTIONS

PIN FUNCTION

1 BIT 10 (LSB)

2 BIT 9

3 BIT 8

4 BIT 7

5 BIT 6

6 DIGITAL GROUND (DGND)

7 +DVS (Digital)

8 BIT 5

9 BIT 4

10 BIT 3

11 BIT 2

12 BIT 1 (MSB)

13 TEST PIN

14 TEST SIGNAL IN

15 RESET

16 DIGITAL GROUND (DGND)

17 SELECT (SEL)

18 +AVS (Analog)

19 TEST MODE

20 LINV

21 MINV

22 A/D CLOCK

23 OUTPUT ENABLE (OE)

24 CHIP ENABLE (CE)

PIN FUNCTION

48 DIGITAL GROUND (DGND)

47 NO CONNECTION

46 NO CONNECTION

45 +DVS (Digital)

44 ANALOG GROUND (AGND)

43 ANALOG GROUND (AGND)

42 TEST SIGNAL IN

41 CALIBRATION (CAL)

40 NO CONNECTION

39 ANALOG INPUT (VIN)

38 TEST SIGNAL OUT

37 TEST SIGNAL IN

36 ANALOG GROUND (AGND)

35 REFERENCE BOTTOM (VRB)

34 REFERENCE BOTTOM (VRB)

33 NO CONNECTION

32 NO CONNECTION

31 NO CONNECTION

30 REFERENCE TOP (VRT)

29 REFERENCE TOP (VRT)

28 ANALOG GROUND (AGND)

27 ANALOG GROUND (AGND)

26 +AVS (Analog)

25 +AVS (Analog)

AGND 27

+AVS 25

VIN 39

VRT 29

VRT 30

VRB 34

VRB 35

SENSE

AMP

S/H AMP

COARSE

COMPARISON

AND

ENCODE

A/D CLOCK 22

CE 24

OE 23

TIMING GEN.

COARSE

CORRECTION

AND

LATCH

DAC

CALIBRATION

UNIT

FINE