AD8370AREZ-RL7 datasheet(7/28 Pages) AD

Part #	AD8370AREZ-RL7

Description	LF to 750 MHz, Digitally Controlled VGA

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Data Sheet

AD8370

Rev. B | Page 7 of 28

TYPICAL PERFORMANCE CHARACTERISTICS

VS = 5 V, ZS = 200 Ω, ZL = 100 Ω, T = 25°C, unless otherwise noted.

0

10

20

30

40

50

60

70

–30

–20

–10

0

10

20

30

40

0

10

20

30

40

60

100

50

70

80

90

110 120 130

GAIN CODE

CODE = LAST 7 BITS OF GAIN CODE

(NO MSB)

HIGH GAIN MODE

LOW GAIN MODE

∆ GAIN

∆ CODE

≅ 0.409

∆ GAIN

∆ CODE

≅ 0.059

Figure 4. Gain vs. Gain Code at 70 MHz

5

10

15

20

25

30

35

40

–5

0

5

10

15

20

25

30

0

20

40

60

80

100

120

140

HIGH GAIN MODE

LOW GAIN MODE

SHADING INDICATES ±3

σ FROM THE

MEAN. DATA BASED ON 30 PARTS

FROM TWO BATCH LOTS.

GAIN CODE

Figure 5. Output Third-Order Intercept vs. Gain Code at 70 MHz

5

10

15

20

25

30

35

40

45

0

20

40

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80

100

120

140

GAIN CODE

HIGH GAIN MODE

380MHz

70MHz

LOW GAIN MODE

Figure 6. Noise Figure vs. Gain Code at 70 MHz

–10

–5

0

5

10

15

20

25

30

35

40

FREQUENCY (MHz)

10

100

1000

HG77

HG127

LG90

LG9

LG18

LG127

HG102

HG18

LG36

HG51

HG25

HG9

HG3

HIGH GAIN CODES SHOWN WITH DASHED LINES

LOW GAIN CODES SHOWN WITH SOLID LINES

Figure 7. Frequency Response vs. Gain Code

FREQUENCY (MHz)

10

15

20

25

30

35

40

20

25

30

35

40

45

50

200

150

50

100

0

250

300

350

400

+25

°C

UNIT CONVERSION NOTE FOR

100

Ω LOAD: dBVrms = dBm–10dB

+85

°C

–40

°C

SHADING INDICATES ±3

σ FROM THE

MEAN. DATA BASED ON 30 PARTS

FROM TWO BATCH LOTS.

Figure 8. Output Third-Order Intercept vs. Frequency at Maximum Gain

0

5

10

15

20

25

200

300

0

100

400

500

600

FREQUENCY (MHz)

HG18

HG127

LG127

Figure 9. Noise Figure vs. Frequency at Various Gains

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