EDGE6435 데이터 시트보기 (PDF) - Semtech Corporation

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EDGE6435

Per-Pin Electronics Companion DAC

Semtech Corporation 

Edge6435/6436

TEST AND MEASUREMENT PRODUCTS

Circuit Description

Chip Overview

Grouping of DACs

The Edge6435/6436 provides 40 output levels. These

outputs can easily be configured to generate the specific

analog voltage and current requirements for 4 or 8

channels of ATE pin electronics including:

– 3 level driver

– Window comparator

– Active load

– Per pin PMU or PTU

without requiring any scaling or shifting via external

components.

DACs are separated into 4 or 8 channels of 4 distinct

functional groups. Groups are defined by:

– Type (voltage or current output)

– Resolution (# of bits)

– Output range

– Output compliance.

Table 1 defines the DACs on a per group and channel

basis.

Selection of 4 or 8 channel format is via the FORMAT

input.

Programming of the chip is done using a 6 wire digital

interface comprised of:

– Serial Data In

– Clock In

– Load

Group C DACs have both voltage and current output pins.

Group C DACs can be individually configured via the serial

interface to be either a voltage or current DAC (but not

both at the same time).

Tables 3 and 4 identify the code needed to configure Group

C DACs. Please note that 24 clock cycles are required to

load the configuration code for each channel.

Attribute

Group

A

Group

B

Group

C

Group

D

Total # of DACs in Group

4 CH Format

8 CH Format

4 per channel

2 per channel

2 per channel

1 per channel

2 per channel

1 per channel

2 per channel

1 per channel

Type

V

V

V/I

I

Resolution

(# of bits)

13

13

13

6

Output Range:

Max DAC Range (Note 1)

Offset Range

16.75V

–3.5V to –0.75V

16.75V

–3.5V to –0.75V

16.75V

–3.5V to –0.75V

or

2.05 mA

(Note 2)

1.6 mA

Adjustable Output Offset

yes

yes

yes for Vout

no for Iout

no

Compliance

±200 µA

±200 µA

±200 µA(V)

–0.2 to +3V(I)

–0.2 to +3V

Note 1:

Note 2:

The max DAC range is achieved through specific AVCC, AVEE, and Gain resistor settings. See the

equations in the "DAC Voltage Output Overview", "DAC Current Output Overview", and specifications

for details.

Group C has both voltage and current outputs.

 2006 Semtech Corp. / Rev. 3, 8/25/06

Table 1. DAC Grouping

7

www.semtech.com

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