AD7879 datasheet(4/40 Pages) AD

4 / 40 page

AD7879/AD7889

Data Sheet

Rev. D | Page 4 of 40

Parameter

Min

Typ

Max

Unit

Test Conditions/Comments

POWER REQUIREMENTS

VCC

1.6

2.6

3.6

Specified performance

ICC

Digital inputs = 0 V or VCC

Converting Mode

480

650

μA

ADC on, PM = 10

Static

406

μA

ADC and temperature sensor are off; the ref-

erence and oscillator are on; PM = 01 or 11

Shutdown Mode

0.5

μA

PM = 00

1 See the Terminology section.

2 Guaranteed by characterization; not production tested.

3 Sample tested at 25°C to ensure compliance.

SPI TIMING SPECIFICATIONS (AD7879/AD7889)

VCC = 1.6 V to 3.6 V, TA = −40°C to +85°C, unless otherwise noted. Sample tested at 25°C to ensure compliance. All input signals are

specified with tR = tF = 5 ns (10% to 90% of VCC) and timed from a voltage level of 1.4 V.

Table 2.

Parameter1

Limit

Unit

Description

fSCL

MHz max

ns min

CS falling edge to first SCL falling edge

ns min

SCL high pulse width

ns min

SCL low pulse width

ns min

DIN setup time

ns min

DIN hold time

ns max

DOUT access time after SCL falling edge

ns max

CS rising edge to DOUT high impedance

ns min

SCL rising edge to CS high

1 Guaranteed by design; not production tested.

SCL

DIN

DOUT

MSB

LSB

MSB

LSB

Figure 2. Detailed SPI Timing Diagram

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