tCES

tCS

D27

D26

D25

D24

tCH

tCWH

tCWL

D23

D0

A3

A2

A1

A0

MSB

LSB

DATAuWire

CLKuWire

LEuWire

tES

tEWH

LMK02002

SNAS418 – AUGUST 2007

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Serial Data Timing Diagram

Data bits set on the DATAuWire signal are clocked into a shift register, MSB first, on each rising edge of the

CLKuWire signal. On the rising edge of the LEuWire signal, the data is sent from the shift register to the

addressed register determined by the LSB bits. After the programming is complete the CLKuWire, DATAuWire,

and LEuWire signals should be returned to a low state.

Charge Pump Current Specification Definitions

I1 = Charge Pump Sink Current at VCPout = Vcc - ΔV

I2 = Charge Pump Sink Current at VCPout = Vcc/2

I3 = Charge Pump Sink Current at VCPout = ΔV

I4 = Charge Pump Source Current at VCPout = Vcc - ΔV

I5 = Charge Pump Source Current at VCPout = Vcc/2

I6 = Charge Pump Source Current at VCPout = ΔV

ΔV = Voltage offset from the positive and negative supply rails. Defined to be 0.5 V for this device.

Charge Pump Output Current Magnitude Variation vs. Charge Pump Output Voltage

6

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