AD7724(RevA) View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

AD7724
(Rev.:RevA)

Dual CMOS
Σ-Δ Modulators

Analog Devices 

Parameter

A Version

Unit

Test Conditions/Comments

LOGIC OUTPUTS

VOH, Output High Voltage

VOL, Output Low Voltage

DVDD1 – 0.2 V min

0.4

V max

|IOUT| ≤ 200 µA

|IOUT| ≤ 1.6 mA

POWER SUPPLIES

AVDD/DVDD

DVDD1

IDD (Total for AVDD, DVDD)

Active Mode

Standby Mode

4.75/5.25

2.85/5.25

60

20

V min/V max

V min/V max

mA max

µA max

Digital Inputs Equal to 0␣ V or DVDD

NOTES

1Operating temperature range is as follows:␣ A Version: –40°C to +85°C.

2Gain Error excludes reference error. The modulator gain is calibrated wrt the voltage on the REF2 pin.

3Measurement Bandwidth = 0.5 × fMCLK; Input Level = –0.05 dB.

4When a square wave clock is used, the dynamic specifications will degrade by 1 dB typically.

Specifications subject to change without notice.

AD7724

BIT STREAM

94.25kHz

120dB

DECIMATE

BY 32

94.25kHz

90dB

DECIMATE

BY 2

16-BIT

OUTPUT

FILTER 1

304.687kHz

FILTER 2

108.874kHz

BANDWIDTH = 94.25kHz

TRANSITION = 304.687kHz

ATTENUATION = 120dB

COEFFICIENTS = 384

BANDWIDTH = 94.25kHz

TRANSITION = 108.874kHz

ATTENUATION = 90dB

COEFFICIENTS = 151

Figure 1. Digital Filter (Consists of Two FIR Filters). This Filter is implemented on the AD7722.

REV. A

–3–

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