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参数资料
| 型号： | MAX19708ETM+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/37页 |
| 文件大小： | 0K |
| 描述： | IC ANLG FRONT END 11MSPS 48-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 43 |
| 位数： | 10 |
| 通道数： | 4 |
| 功率（瓦特）： | 36.9mW |
| 电压 - 电源，模拟： | 3V |
| 电压 - 电源，数字： | 3V |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（7x7） |
| 包装： | 管件 |
| 产品目录页面： | 1398 (CN2011-ZH PDF) |
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MAX19708
10-Bit, 11Msps, Ultra-Low-Power
Analog Front-End
30
______________________________________________________________________________________
low distortion to maintain the input signal integrity. The
op-amp circuit shown in Figure 12 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
Ω. 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 MAX19708 is optimized to operate in TD-SCDMA
applications. When FAST mode is selected, the
MAX19708 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 par-
allel 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 con-
tention. In TDD mode, the MAX19708 uses 41.1mW
power in Rx mode at fCLK = 11MHz and the DAC uses
42.3mW in Tx mode.
TD-SCDMA Application
Figure 13 illustrates a typical TD-SCDMA application
circuit. The MAX19708 is designed to interface directly
with the MAX2507 and MAX2392 radio front-ends to
provide a complete “RF-to-Bits” front-end solution. The
MAX19708 provides several features that allow direct
interface to the MAX2392 and MAX2507:
Integrated Tx filters reduce component count,
lower cost, and meet TD-SCDMA spectral mask
requirements
Programmable DC common-mode Tx output levels
eliminate discrete DC-level-shifting components
while preserving Tx DAC full dynamic range
Optimized Tx full-scale output level eliminates dis-
crete amplifiers for I/Q gain control
Tx-I/Q offset correction eliminates discrete trim
DACs for offset trim to improve sideband/carrier
suppression
One microsecond settling time aux-DACs for VGA
and AGC control allow fast, accurate Tx power and
Rx gain control
Figure 10. Balun Transformer-Coupled Differential-to-Single-
Ended Output Drive for Tx DAC
MAX19708
IDP
IDN
VOUT
QDP
QDN
VOUT
Figure 11. Single-Ended Drive for Rx ADC
MAX19708
0.1
μF
1k
Ω
1k
Ω
100
Ω
100
Ω
CIN
22pF
CIN
22pF
QAP
QAN
COM
IAP
IAN
0.1
μF
RISO
50
Ω
RISO
50
Ω
REFP
REFN
VIN
0.1
μF
1k
Ω
1k
Ω
100
Ω
100
Ω
CIN
22pF
CIN
22pF
0.1
μF
RISO
50
Ω
RISO
50
Ω
REFP
REFN
VIN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX19708ETM+ | 功能描述:ADC / DAC多通道 11Msps 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 |
| MAX19708ETM+T | 功能描述:ADC / DAC多通道 11Msps 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 |
| MAX19708ETM-T | 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 |
| MAX19708EVCMOD2 | 功能描述:ADC / DAC多通道 Maxim Evaluation System 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 |
| MAX19708EVCMODU | 功能描述:ADC / DAC多通道 10-bit 11Msps Ultra-Low-Power Analog Front-End 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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