AD7927 datasheet(3/20 Pages) AD

Part #	AD7927

Description	8-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 20-Lead TSSOP

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REV. 0

AD7927

–3–

Parameter

B Version

1

Unit

Test Conditions/Comments

CONVERSION RATE

Conversion Time

800

ns max

16 SCLK Cycles with SCLK at 20 MHz

Track-and-Hold Acquisition Time

300

ns max

Sine Wave Input

300

ns max

Full-Scale Step Input

Throughput Rate

200

kSPS max

See Serial Interface Section

POWER REQUIREMENTS

AVDD

2.7/5.25

V min/max

VDRIVE

2.7/5.25

V min/max

IDD

4

Digital I/Ps = 0 V or VDRIVE

During Conversion

2.7

mA max

AVDD = 4.75 V to 5.25 V, fSCLK = 20 MHz

2

mA max

AVDD = 2.7 V to 3.6 V, fSCLK = 20 MHz

Normal Mode (Static)

600

mA typ

AVDD = 2.7 V to 5.25 V, SCLK On or Off

Normal Mode (Operational) fSAMPLE = 200 kSPS 1.5

mA max

AVDD = 4.75 V to 5.25 V, fSCLK = 20 MHz

1.2

mA max

AVDD = 2.7 V to 3.6 V, fSCLK = 20 MHz

Using Auto Shutdown Mode fSAMPLE = 200 kSPS 900

mA typ

AVDD = 4.75 V to 5.25 V, fSCLK = 20 MHz

650

mA typ

AVDD = 2.7 V to 3.6 V, fSCLK = 20 MHz

Auto Shutdown (Static)

0.5

mA max

SCLK On or Off (20 nA typ)

Full Shutdown Mode

0.5

mA max

SCLK On or Off (20 nA typ)

Power Dissipation

4

Normal Mode (Operational)

7.5

mW max

AVDD = 5 V, fSCLK = 20 MHz

3.6

mW max

AVDD = 3 V, fSCLK = 20 MHz

Auto Shutdown (Static)

2.5

mW max

AVDD = 5 V

1.5

mW max

AVDD = 3 V

Full Shutdown Mode

2.5

mW max

AVDD = 5 V

1.5

mW max

AVDD = 3 V

NOTES

1Temperature ranges as follows: B Version: –40

∞C to +85∞C.

2See Terminology section.

3Sample tested @ 25

∞C to ensure compliance.

4See Power versus Throughput Rate section.

Specifications subject to change without notice.

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