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參數資料
| 型號： | MAX5864ETM+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 13/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ANLG FRONT END 22MSPS 48-TQFN |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 43 |
| 位數： | 10 |
| 通道數： | 4 |
| 功率（瓦特）： | 2.10W |
| 電壓 - 電源，模擬： | 2.7 V ~ 3.3 V |
| 電壓 - 電源，數字： | 1.8 V ~ 3.3 V |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 48-TQFN-EP（7x7） |
| 包裝： | 管件 |
MAX5864
Using Op-Amp Coupling
Drive the MAX5864 ADCs with op amps when a balun
transformer is not available. Figures 9 and 10 show the
ADCs being driven by op amps for AC-coupled single-
ended, and DC-coupled differential applications.
Amplifiers such as the MAX4354/MAX4454 provide
high speed, high bandwidth, low noise, and low distor-
tion to maintain the input signal integrity. Figure 10 can
also be used to interface with the DAC differential ana-
log outputs to provide gain or buffering. The DAC dif-
ferential analog outputs cannot be used in single-
ended mode because of the internally generated
1.4VDC common-mode level. Also, the 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 conversion and select an amplifier with
proper input common-mode voltage range.
FDD and TDD Modes
The MAX5864 can be used in diverse applications
operating FDD or TDD modes. The MAX5864 operates
in Xcvr mode for FDD applications such as WCDMA-
3GPP (FDD) and 4G technologies. Also, the MAX5864
can switch between Tx and Rx modes for TDD applica-
tions
like
TD-SCDMA,
WCDMA-3GPP
(TDD),
IEEE802.11a/b/g, and IEEE802.16.
In FDD mode, the ADC and DAC operate simultaneous-
ly. The ADC bus and DAC bus are dedicated and must
be connected in 18-bit parallel (8-bit ADC and 10-bit
DAC) to the digital baseband processor. Select Xcvr
mode through the 3-wire serial interface and use the
conversion clock to latch data. In FDD mode, the
MAX5864 uses 34mW power at fCLK = 15.36MHz. This
is the total power of the ADC and DAC operating simul-
taneously.
In TDD mode, the ADC and DAC operate independent-
ly. The ADC and DAC bus are shared and can be con-
nected together, forming a single 10-bit parallel bus to
the digital baseband processor. Using the 3-wire serial
interface, select between Rx mode to enable the ADC
and Tx mode to enable the DAC. When operating in Rx
mode, the DAC does not transmit because the core is
disabled and in Tx mode, the ADC bus is tri-state. This
eliminates any unwanted spurious emissions and pre-
vents bus contention. In TDD mode, the MAX5864 uses
24.7mW power in Rx mode at fCLK = 15.36MHz, and
the DAC uses 24mW in Tx mode.
Ultra-Low-Power, High Dynamic-
Performance, 22Msps Analog Front End
20
______________________________________________________________________________________
Figure 9. Single-Ended Drive for ADCs
MAX5864
0.1
F
1k
1k
100
100
CIN
22pF
CIN
22pF
INB+
INB-
COM
INA+
INA-
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
Figure 8. Balun-Transformer Coupled Differential to Single-
Ended Output Drive for DACs
MAX5864
ID+
ID-
VOUT
QD+
QD-
VOUT
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5864ETM+ | 功能描述:ADC / DAC多通道 10-Bit 2Ch 22Msps CODEC/AFE RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX5864ETM+T | 功能描述:ADC / DAC多通道 10-Bit 2Ch 22Msps CODEC/AFE RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX5864ETM-T | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX5865ETM | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX5865ETM+ | 功能描述:ADC / DAC多通道 10-Bit 2Ch 40Msps CODEC/AFE RoHS:否 制造商:Texas Instruments 轉換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-40 |
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