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參數(shù)資料
| 型號： | HI5735KCB |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | DAC |
| 英文描述： | 12-Bit, 80 MSPS, High Speed Video D/A Converter |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 0.02 us SETTLING TIME, 12-BIT DAC, PDSO28 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 136K |
| 代理商： | HI5735KCB |
1627
Detailed Description
The HI5735 is a 12-bit, current out D/A converter. The DAC
can convert at 80 MSPS and runs on +5V and -5.2V supplies.
The architecture is an R/2R and segmented switching current
cell arrangement to reduce glitch. Laser trimming is employed
to tune linearity to true 12-bit levels. The HI5735 achieves its
low power and high speed performance from an advanced
BiCMOS process. The HI5735 consumes 650mW (typical)
and has an improved hold time of only 0.25ns (typical).
Digital Inputs
The HI5735 is a TTL/CMOS compatible D/A. Data is latched
by a Master register. Once latched, data inputs D0 (LSB)
thru D11 (MSB) are internally translated from TTL to ECL.
The internal latch and switching current source controls are
implemented in ECL technology to maintain high switching
speeds and low noise characteristics.
Decoder/Driver
The architecture employs a split R/2R ladder and Seg-
mented Current source arrangement. Bits D0 (LSB) thru D7
directly drive a typical R/2R network to create the binary
weighted current sources. Bits D8 thru D11 (MSB) pass thru
a “thermometer” decoder that converts the incoming data
into 15 individual segmented current source enables. This
split architecture helps to improve glitch, thus resulting in a
more constant glitch characteristic across the entire output
transfer function.
Clocks and Termination
The internal 12-bit register is updated on the rising edge of
the clock. Since the HI5735 clock rate can run to 80 MSPS,
to minimize reflections and clock noise into the part, proper
termination should be used. In PCB layout clock runs should
be kept short and have a minimum of loads. To guarantee
consistent results from board to board, controlled impedance
PCBs should be used with a characteristic line impedance
Z
O
of 50
.
To terminate the clock line, a shunt terminator to ground is
the most effective type at a 80 MSPS clock rate. A typical
value for termination can be determined by the equation:
R
T
= Z
O
,
for the termination resistor. For a controlled impedance
board with a Z
O
of 50
, the R
T
= 50
. Shunt termination is
best used at the receiving end of the transmission line or as
close to the HI5735 CLK pin as possible.
Rise and Fall times and propagation delay of the line will be
affected by the Shunt Terminator. The terminator should be
connected to DGND.
Pin Descriptions
PIN NUMBER
PIN NAME
PIN DESCRIPTION
1-12
D11 (MSB)
thru D0 (LSB)
Digital Data Bit 11, the Most Significant Bit thru Digital Data Bit 0, the Least Significant Bit.
15
CLK
Data Clock Pin DC to 80 MSPS.
13, 14
NC
No Connect.
16
V
CC
DGND
Digital Logic Supply +5V.
17, 28
Digital Ground.
18
DV
EE
R
SET
AGND
-5.2V Logic Supply.
23
External resistor to set the full scale output current. I
FS
= 16 x (V
REF OUT
/ R
SET
). Typically 976
.
Analog Ground supply current return pin.
27
19
ARTN
Analog Signal Return for the R/2R ladder.
21
I
OUT
I
OUT
AV
EE
CTRL IN
Current Output Pin.
20
Complementary Current Output Pin.
22
-5.2V Analog Supply.
24
Input to the current source base rail. Typically connected to CTRL OUT and a 0.1
μ
F capacitor to AV
EE
.
Allows external control of the current sources.
25
CTRL OUT
Control Amplifier Out. Provides precision control of the current sources when connected to CTRL IN such
that I
FS
= 16 x (V
REF OUT
/ R
SET
).
-1.23V (typical) bandgap reference voltage output. Can sink up to 125
μ
A or be overdriven by an external
reference capable of delivering up to 2mA.
26
REF OUT
FIGURE 10. CLOCK LINE TERMINATION
R
T
= 50
HI5735
DAC
CLK
Z
O
= 50
HI5735
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HI5735KCP | 12-Bit, 80 MSPS, High Speed Video D/A Converter |
| HI5735 | 12-Bit, 80 MSPS, High Speed Video D/A Converter |
| HI5762 | Dual 10-Bit, 60MSPS A/D Converter(雙路、10位采樣速率為60MSPS的A/D轉(zhuǎn)換器) |
| HI5766 | 10-Bit, 60 MSPS A/D Converter(10位、采樣速率為60MSPS的A/D轉(zhuǎn)換器) |
| HI5767 | 10-Bit, 20/40/60 MSPS A/D Converter with Internal Voltage Reference(10位內(nèi)部帶電壓基準的A/D轉(zhuǎn)換器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HI5735KCBS2503 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HI5735KCBZ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 28 COMTEMP D/A 12 BIT 80 MHZ -5 2V RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| HI5735KCP | 制造商:Rochester Electronics LLC 功能描述:28 PDIP COMTEMP D/A 12 BIT 80 MHZ -5.2V - Bulk |
| HI5735KCPS2503 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HI573IBIB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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