ADM1026JSTZ-R7 datasheet(16/55 Pages) ONSEMI

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ADM1026

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output of 3/4 full scale (decimal 192) for the nominal input

voltage, and so has adequate headroom to cope with over

voltages. Table 7 shows the input ranges of the analog inputs

and output codes of the ADC.

When the ADC is running, it samples and converts an

analog or local temperature input every 711

ms (typical value).

Each input is measured 16 times and the measurements are

averaged to reduce noise, so the total conversion time for each

input is 11.38 ms.

Measurements on the remote temperature (D1 and D2)

inputs take 2.13 ms. These are also measured 16 times and

are averaged, so the total conversion time for a remote

temperature input is 34.13 ms.

Table 7. A-TO-D OUTPUT CODES VS. VIN

Input Voltage

A-to-D Output

+12 VIN

–12 VIN

+5.0 VIN

3.3 V MAIN

VBAT

VCCP

AIN (0–5)

AIN (6–9)

Decimal

Binary

< 0.0625

< −15.928

< 0.026

< 0.0172

< 0.012

< 0.010

00000000

0.062−0.125

−15.928−15.855

0.026−0.052

0.017−0.034

0.012−0.023

0.010−0.019

00000001

0.125−0.187

−15.855−15.783

0.052−0.078

0.034−0.052

0.023−0.035

0.019−0.029

00000010

0.188−0.250

−15.783−15.711

0.078−0.104

0.052−0.069

0.035−0.047

0.029−0.039

00000011

0.250−0.313

−15.711−15.639

0.104−0.130

0.069−0.086

0.047−0.058

0.039−0.049

00000100

0.313−0.375

−15.639−15.566

0.130−0.156

0.086−0.103

0.058−0.070

0.049−0.058

00000101

0.375−0.438

−15.566−15.494

0.156−0.182

0.103−0.120

0.070−0.082

0.058−0.068

00000110

0.438−0.500

−15.494−15.422

0.182−0.208

0.120−0.138

0.082−0.094

0.068−0.078

00000111

0.500−0.563

−15.422−15.349

0.208−0.234

0.138−0.155

0.094−0.105

0.078−0.087

00001000

−

4.000−4.063

−11.375−11.303

1.667−1.693

1.110−1.127

0.750−0.780

0.625−0.635

(1⁄4 scale)

01000000

−

8.000−8.063

−6.750−6.678

3.333−3.359

2.000−2.016

1.500−1.512

1.250−1.260

128

(1⁄2 scale)

10000000

−

12.000−12.063

−2.125−2.053

5−5.026

3.330−3.347

3.000−3.016

2.250−2.262

1.875−1.885

192

(3⁄4 scale)

11000000

−

15.313−15.375

1.705−1.777

6.38−6.406

4.249−4.267

3.828−3.844

2.871−2.883

2.392−2.402

245

11110101

15.375−15.437

1.777−1.850

6.406−6.432

4.267−4.284

3.844−3.860

2.883−2.895

2.402−2.412

246

11110110

15.437−15.500

1.850−1.922

6.432−6.458

4.284−4.301

3.860−3.875

2.895−2.906

2.412−2.422

247

11110111

15.500−15.563

1.922−1.994

6.458−6.484

4.301−4.319

3.875−3.890

2.906−2.918

2.422−2.431

248

11111000

15.562−15.625

1.994−2.066

6.484−6.51

4.319−4.336

3.890−3.906

2.918−2.930

2.431−2.441

249

11111001

15.625−15.688

2.066−2.139

6.51−6.536

4.336−4.353

3.906−3.921

2.930−2.941

2.441−2.451

250

11111010

15.688−15.750

2.139−2.211

6.536−6.563

4.353−4.371

3.921−3.937

2.941−2.953

2.451−2.460

251

11111011

15.750−15.812

2.211−2.283

6.563−6.589

4.371−4.388

3.937−3.953

2.953−2.965

2.460−2.470

252

11111100

15.812−15.875

2.283−2.355

6.589−6.615

4.388−4.405

3.953−3.969

2.965−2.977

2.470−2.480

253

11111101

15.875−15.938

2.355−2.428

6.615−6.641

4.405−4.423

3.969−3.984

2.977−2.988

2.480−2.490

254

11111110

>15.938

>2.428

>6.634

>4.423

>3.984

>2.988

>2.490

255

11111111

1. * VBAT is not accurate for voltages under 1.5 V (see Figure 14).

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