AD605
Rev. F | Page 6 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
AD605
VGN1
VPOS
FBK1
OUT1
VREF
–IN1
+IN1
GND1
OUT2
FBK2
VPOS
GND2
+IN2
–IN2
VGN2
VOCM
00541-002
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 VGN1 CH1 Gain Control Input and Power-Down Pin. If grounded, device is off; otherwise, positive voltage increases gain.
2 −IN1 CH1 Negative Input.
3 +IN1 CH1 Positive Input.
4 GND1 Ground.
5 GND2 Ground.
6 +IN2 CH2 Positive Input.
7 −IN2 CH2 Negative Input.
8 VGN2 CH2 Gain Control Input and Power-Down Pin. If grounded, device is off; otherwise, positive voltage increases gain.
9 VOCM Input to This Pin Defines Common-Mode Voltage for OUT1 and OUT2.
10 OUT2 CH2 Output.
11 FBK2 Feedback Pin That Selects Gain Range of CH2.
12 VPOS Positive Supply.
13 VPOS Positive Supply.
14 FBK1 Feedback Pin That Selects Gain Range of CH1.
15 OUT1 CH1 Output.
16 VREF Input to This Pin Sets Gain Scaling for Both Channels: 2.5 V = 20 dB/V and 1.67 V = 30 dB/V.
AD605
Rev. F | Page 7 of 24
TYPICAL PERFORMANCE CHARACTERISTICS (PER CHANNEL)
V
REF
= 2.5 V (20 dB/V scaling), f = 1 MHz, R
L
= 500 Ω, C
L
= 5 pF, T
A
= 25°C, V
SS
= 5 V.
40
–20
30
20
10
0
–10
00541-003
VGN (V)
GAIN (dB)
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9
–40°C, +25°C, +85°C
Figure 3. Gain vs. VGN
VGN (V)
GAIN (dB)
50
–20
40
20
10
0
–10
30
FBK (OPEN)
FBK (SHORT)
00541-004
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9
Figure 4. Gain vs. VGN for Different Gain Ranges
30dB/V
(V
REF
= 1.67V)
20dB/V
(V
REF
= 2.50V)
ACTUAL
ACTUAL
40
–20
30
20
10
0
–10
00541-005
VGN (V)
GAIN (dB)
0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9
Figure 5. Gain vs. VGN for Different Gain Scalings
GAIN SCALING (dBV)
40.0
37.5
20.0
30.0
27.5
25.0
22.5
35.0
32.5
THEORETICAL
ACTUAL
V
REF
(V)
1.25 1.50 1.75 2.00 2.25 2.50
00541-006
Figure 6. Gain Scaling vs. V
REF
GAIN ERROR (dB)
3.0
2.5
–3.0
0.2 0.7 1.2 1.7 2.2 2.7
–1.0
–1.5
–2.0
–2.5
2.0
1.0
1.5
–0.5
0.5
0
VGN (V)
+25°C
+85°C
–40°C
00541-007
Figure 7. Gain Error vs. VGN at Three Temperatures
VGN (V)
GAIN ERROR (dB)
2.0
1.5
–2.0
0.2 0.7 1.2 1.7 2.2 2.7
0
–0.5
–1.0
–1.5
1.0
0.5
f = 5MHz
f = 10MHz
00541-008
f = 1MHz
Figure 8. Gain Error vs. VGN at Three Frequencies
AD605
Rev. F | Page 8 of 24
VGN (V)
GAIN ERROR
2.0
1.0
1.5
0.5
0
–0.5
–1.0
–1.5
–2.0
0.2 0.7 1.71.2 2.2 2.7
00541-009
20dB/V
V
REF
= 2.50V
30dB/V
V
REF
= 1.67V
Figure 9. Gain Error vs. VGN for Two Gain Scale Values
DELTA GAIN (dB)
PERCENTAGE
20
6
0
–0.8 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8
18
8
4
2
16
12
14
10
ΔG(dB) = G(CH1) – G(CH2)
N = 50
00541-010
Figure 10. Gain Match, VGN1 = VGN2 = 1.0 V
00541-011
DELTA GAIN (dB)
PERCENTAGE
20
6
0
–0.8 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8
18
8
4
2
16
12
14
10
ΔG(dB) = G(CH1) – G(CH2)
N = 50
Figure 11. Gain Match, VGN1 = VGN2 = 2.50 V
FREQUENCY (Hz)
GAIN (dB)
60
40
–60
0
–20
–40
20
VGN = 2.9V (FBK = OPEN)
VGN = 2.9V (FBK = SHORT)
VGN = 1.5V (FBK = OPEN)
VGN = 1.5V (FBK = SHORT)
VGN = 0.1V (FBK = OPEN)
VGN = 0.1V (FBK = SHORT)
VGN = 0.0V
00541-013
100k
1M 10M 100M
Figure 12. AC Response for Three Values of VGN
VGN (V)
V
OS
(V)
2.525
2.475
0
2.520
2.495
2.490
2.485
2.480
2.515
2.510
2.500
2.505
V
OCM
= 2.50V
–40°C
+25°C
+85°C
00541-014
0.5 1.0 1.5 2.0 2.5 3.0
Figure 13. Output Offset vs. VGN at Three Temperatures
00541-015
VGN (V)
130
90
125
110
105
100
95
120
115
0 0.5 1.0 1.5 2.0 2.5 3.0
+85°C
+25°C
NOISE (nV/ Hz)
–40°C
Figure 14. Output Referred Noise vs. VGN at Three Temperatures

AD605ARZ

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Special Purpose Amplifiers Dual Low Noise SGL-Supply VGA
Lifecycle:
New from this manufacturer.
Delivery:
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