12-Bit, 100Msps ECL DAC

4

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NAME

FUNCTION

1–10

D2–D11

Digital Input Bits 2–11

PIN

13

Analog Return

Analog Return Ground

12, 21

Digital Negative Supply (-5.2V)

11

D12 (LSB)

Digital Input Bit 12 (LSB)

______________________________________________________________Pin Description

14

Analog Current Output

15, 25

Analog Negative Supply (-5.2V)

16

I

_

OUT

Complementary Analog Current Output

17

Ref In

Voltage Reference Input

20

Ref Out

Internal Voltage Reference Output. Ref Out is normally connected to Control Amp In.

19

Control Amp In

Internal Control Amplifier Input. Control Amp In is normally connected to Ref Out (if not con-

nected to external reference).

18

Control Amp Out

Internal Control Amplifier Output. Control Amp Out is normally connected to Ref In.

26

Latch Enable

Latch Control Line

24

(nominally 7.5k

Ω).

23

N.C.

No Connection. Not internally connected.

22

Ref GND

Ground Return for Internal Voltage Reference and Amplifier

28

D1 (MSB)

Digital Input Bit 1 (MSB)

27

DGND

Digital Ground Return

*

Figure 1. Timing Diagram