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參數(shù)資料
| 型號(hào)： | SSM2018TPZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO MONO CLASS AB 16DIP |
| 標(biāo)準(zhǔn)包裝： | 25 |
| 放大器類型： | 音頻 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 5 V/µs |
| 增益帶寬積： | 14MHz |
| 電流 - 輸入偏壓： | 250nA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 11mA |
| 電壓 - 電源，單路/雙路(±)： | 10 V ~ 36 V，±5 V ~ 18 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 16-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 16-PDIP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 775 (CN2011-ZH PDF) |
REV. B
–12–
SSM2018T
If a symmetry trim is to be performed, it should precede the
control feedthrough trim and be done as follows:
1. Apply a 1 kHz sine wave of 10 dBu to the input with the
control voltage set for unity gain.
2. Adjust the symmetry trim potentiometer to minimize distor-
tion of the output signal.
Next the control feedthrough trim is done as follows:
1. Ground the input signal port and apply a 60 Hz sine wave
to the control port. The sine wave should have its high and
low peaks correspond to the highest gain to be used in the
application and 30 dB of attenuation, respectively. For
example, a range of 20 dB gain to 30 dB attenuation requires
that the sine wave amplitude ranges between –560 mV and
+840 mV on Pin 11.
2. Adjust the control feedthrough potentiometer to null the
signal seen at the output.
VIN
VC
VG
V1–G
Figure 7. OVCE Follower/VCA Connection
18k
50pF
470k
500k
V+
100k
10M
CONTROL
FEEDTHROUGH
TRIM
V+
V–
V1–G
VG
INPUTS
220pF
NC
V–
1 F
1k
3k
VCONTROL
RB: 30k
FOR CLASS A
150k
FOR CLASS AB
NC = NO CONNECT
SYMMETRY
TRIM
V+
RB
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SSM2018T
18k
50pF
Figure 8. OVCE Application Circuit
Voltage Controlled Panner
An interesting circuit that is built with the OVCE building
block is a voltage controlled panner. Figure 9 shows the feed-
back connection for the circuit. Notice that the average of both
outputs is fed back to the input. Thus, the average must be
equal to the input voltage. When the control voltage is set for
gain at VG, this causes V1–G to attenuate (to keep the average the
same). On the other hand, when VG is attenuated, V1–G is ampli-
fied. The result is that the control voltage causes the input to
“pan” from one output to the other. The following expressions
show how this circuit works mathematically:
V
G = 2 K V IN and V I –G = 2(1 – K ) V IN
(4)
where K varies between 0 and 1 as the control voltage is changed
from full attenuation to full gain, respectively. When VC = 0,
then K = 0.5 and VG = V1–G = VIN. Again, trimming is required
for best performance. Pin 9 must be grounded. This is possible
because the feedback is constant and the adaptive network is not
needed. The VCP is the only application shown in this data
sheet where Pin 9 is grounded.
VIN
VC
VG
V1–G
18k
Figure 9. Basic VCP Connection
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