AD7886 datasheet(4/16 Pages) AD

4 / 16 page

AD7886

–4–

REV. B

ORDERING GUIDE

Integral

Temperature

SNR

Nonlinearity

Package

Model1, 2

Range

(dBs)

(LSBs)

Option3

AD7886JD

°C to +70°C

D-28

AD7886KD

°C to +70°C67

±2.0

D-28

AD7886JP

°C to +70°C

P-28A

AD7886KP

°C to +70°C67

±2.0

P-28A

AD7886BD

–40

°C to +85°C67

±2.0

D-28

AD7886TD

–55

°C to +125°C65

±2.0

D-28

NOTES

1Contact your sales office for availability of AD7886BD, AD7886TD and 1 MHz version.

2Analog Devices reserves the right to ship J-Leaded Ceramic Chip Carrier (JLCCC) in lieu of PLCC packages.

3D = Ceramic DIP; P = Plastic Leaded Chip Carrier.

PIN FUNCTION DESCRIPTION

DIP Pin

Number

Mnemonic

Description

Power Supply

10 & 19

VDD

Positive Power Supply, +5 V

± 5%. Both V

DD pins must be tied together.

15 & 24

VSS

Negative Power Supply, –5 V

± 5%. Both V

SS pins must be tied together.

16 & 23

AGND

Analog Ground. Both AGND pins must be tied together.

DGND

Digital Ground.

Analog and Reference Inputs

17 & 18

VIN

Analog Inputs, VIN1 and VIN2. The part can be pin strapped for any one of three analog input ranges;

Range

Pin Strap

Signal Input

0 V to 5 V

Connect VIN2 to VIN1

VIN1 & VIN2

0 V to 10 V

Connect VIN2 to GND

VIN1

±5 V

Connect VIN2 to +5 V

VIN1

+5REF

+5 V Reference input. This input is used in conjunction with SUM and VREF inputs to scale an external

+5 V reference to –3.5 V, the required reference for the part (see Figure 2).

SUM

Summing Point. This input is used in conjunction with +5REF and VREF inputs to scale an external

+5 V reference to –3.5 V, the required reference for the part (see Figure 2).

VREF

Voltage Reference Input. The AD7886 is specified with VREF = –3.5 V.

Interface and Control

1–4,

DB7–DB4

Three-state data outputs.

6–9,

DB3–DB0

These outputs are controlled by

CS and RD. DB11 is the Most Significant Bit (MSB).

25–28

DB11–DB8

BUSY

BUSY Output indicates converter status. BUSY is low during conversion.

Chip Select Input. The device is selected when this input is low.

Read Input. This active low signal, in conjunction with

CS, is used to enable the output data three-state

drivers.

CONVST

Conversion Start Input. This input is used to start conversion.

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