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| 型号： | MAX9989ETP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC BUFFER LO 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | LO 缓冲器/分路器 |
| 频率： | 700MHz ~ 1.1GHz |
| RF 型： | 手机，GSM，DCS，PCS，UMTS |
| 次要属性： | 40dB 反向隔离 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
+14dBm to +20dBm LO Buffers
with ±1dB Variation
Table 1. External Resistor Values for +14dBm to +20dBm Output Power
NOMINAL
MAX9989
MAX9990
OUTPUT POWER
R2 (k ? )
R4 (k ? )
R3 (k ? )
R5 (k ? )
INPUT DRIVE
INPUT DRIVE
(dBm)
(dBm)
(dBm)
+20
+19
+18
+17
+16
+15
+14
1.35
2.2
5.0
Open
Open
Open
Open
Open
Open
Open
Open
1.8
0.9
0.6
2.0
3.0
6.0
Open
Open
Open
Open
Open
Open
Open
Open
3.0
1.1
0.6
10 ±3
9 ±3
8 ±3
7 ±3
6 ±3
5 ±3
4 ±3
12 ±3
11 ±3
10 ±3
9 ±3
8 ±3
7 ±3
6 ±3
Table 2. Component Values for Typical
Application Circuit
COMPONENT VALUE
Applications Information
Input and Output Matching
All input and output matching is accomplished on chip;
no external matching circuitry is required. Use a DC
DESIGNATION
C1, C2, C4, C6, C8,
C9, C10
C3, C7, C11
C5
R2 – R5
R1
MAX9989
(LOWBAND)
47pF
0.1μF
5pF
See Table 1
100 ?
MAX9990
(HIGHBAND)
22pF
0.1μF
22pF
See Table 1
100 ?
block of about 47pF (low band) or 22pF (high band) at
the input and the outputs. Because these parts are
internally broadband matched, adjusting external com-
ponent values can optimize performance for a particu-
lar band.
Input Drive Level
In the case of the MAX9989, the typical required input
drive level is +7dBm for +17dBm output, or +10dBm for
+20dBm output. The MAX9990 uses slightly higher
input levels (see Table 1). The typical VCO cannot pro-
Output Amplifier
The output amplifier is similar to the input amplifier,
except it is biased higher to provide more output power.
For example, with an input power of +10dBm, the
MAX9989 can deliver +20dBm. The bias is adjustable;
see Table 1 for details.
The RF output is internally matched to 50 ? , with a typi-
cal VSWR limit of 2:1. Provide DC-blocking capacitors
at the outputs.
vide sufficient drive by itself; the typical application fol-
lows the VCO with attenuation (about +3dB), and then
with a low-noise gain block. This allows the VCO to
drive the MAX9989/MAX9990 input at the required level
without being load-pulled.
Output Drive Level
The output drive of the MAX9989/MAX9990 is nominally
+17dBm ±1dB. This is the typical application, with no
external bias-setting resistors at INBIAS and OUTBIAS.
Output power can be set from +14dBm to +20dBm by
using the bias-setting resistor values listed in Table 1.
Chip Information
TRANSISTOR COUNT: 89
PROCESS: BiCMOS
_______________________________________________________________________________________
9
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| MAX998ESA+ | 功能描述:校验器 IC Single Low Power Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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| MAX998ESA-T | 功能描述:校验器 IC Single Low Power Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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