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参数资料
| 型号： | MAX19705ETM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/37页 |
| 文件大小： | 0K |
| 描述： | IC ANLG FRNT END 48-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 位数： | 10 |
| 通道数： | 4 |
| 功率（瓦特）： | 28.2mW |
| 电压 - 电源，模拟： | 2.7 V ~ 3.3 V |
| 电压 - 电源，数字： | 1.8 V ~ 3.3 V |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（7x7） |
| 包装： | 带卷 (TR) |
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MAX19705
10-Bit, 7.5Msps, Ultra-Low-Power
Analog Front-End
30
______________________________________________________________________________________
Using Op-Amp Coupling
Drive the MAX19705 Rx ADC with op amps when a
balun transformer is not available. Figures 10 and 11
show the Rx ADC being driven by op amps for AC-cou-
pled single-ended and DC-coupled differential applica-
tions. Amplifiers such as the MAX4454 and MAX4354
provide high speed, high bandwidth, low noise, and
low distortion to maintain the input signal integrity. The
op-amp circuit shown in Figure 11 can also be used to
interface with the Tx DAC differential analog outputs to
provide gain or buffering. The Tx DAC differential ana-
log outputs cannot be used in single-ended mode
because of the internally generated common-mode
level. Also, the Tx DAC analog outputs are designed to
drive a differential input stage with input impedance
≥ 70k. If single-ended outputs are desired, use an
amplifier to provide differential-to-single-ended conver-
sion and select an amplifier with proper input common-
mode voltage range.
TDD Mode
The MAX19705 is optimized to operate in TDD applica-
tions. When FAST mode is selected, the MAX19705 can
switch between Tx and Rx modes through the T/R pin
in typically 0.5s. The Rx ADC and Tx DAC operate
independently. The Rx ADC and Tx DAC digital bus are
shared forming a single 10-bit parallel bus. Using the 3-
wire serial interface or external T/R pin, select between
Rx mode to enable the Rx ADC or Tx mode to enable
the Tx DAC. When operating in Rx mode, the Tx DAC
bus is not enabled and in Tx mode the Rx ADC bus is
tri-stated, eliminating any unwanted spurious emissions
and preventing bus contention. In TDD mode, the
MAX19705 uses 28.2mW power at fCLK = 7.5MHz.
TDD Application
Figure 12 illustrates a typical TDD application circuit.
The MAX19705 interfaces directly with the radio front-
ends to provide a complete “RF-to-Bits” solution for
TDD applications. The MAX19705 provides several sys-
tem benefits to digital baseband developers.
Fast Time-to-Market
High-Performance, Low-Power Analog Functions
Low Risk, Proven Analog Front-End Solution
No Mixed-Signal Test Times
No NRE Charges
No IP Royalty Charges
Enables Digital Baseband to Scale with 65nm to
90nm CMOS
Figure 9. Balun Transformer-Coupled Differential-to-Single-
Ended Output Drive for Tx DAC
MAX19705
IDP
IDN
VOUT
QDP
QDN
VOUT
Figure 10. Single-Ended Drive for Rx ADC
MAX19705
0.1
F
1k
1k
100
100
CIN
22pF
CIN
22pF
QAP
QAN
COM
IAP
IAN
0.1
F
RISO
50
RISO
50
REFP
REFN
VIN
0.1
F
1k
1k
100
100
CIN
22pF
CIN
22pF
0.1
F
RISO
50
RISO
50
REFP
REFN
VIN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX19705EVCMOD2 | 功能描述:ADC / DAC多通道 Evaluation System for the MAX19705 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX19705EVCMODU | 功能描述:ADC / DAC多通道 Evaluation System for the MAX19705 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX19705EVKIT | 功能描述:数据转换 IC 开发工具 Evaluation Kit for the MAX19705 MAX19706 MAX19707 MAX19708 RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MAX19706ETM | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX19706ETM+ | 功能描述:ADC / DAC多通道 22Msps CODEC/AFE 1.8/2.7-3.3V RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
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