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参数资料
| 型号： | HI5762EVAL2 |
| 厂商： | Intersil |
| 文件页数： | 2/17页 |
| 文件大小： | 0K |
| 描述： | EVALUATION MOD FOR HI5762 AMP |
| 标准包装： | 1 |
| ADC 的数量： | 2 |
| 位数： | 10 |
| 采样率（每秒）： | 60M |
| 数据接口： | 并联 |
| 输入范围： | 1 Vpp |
| 在以下条件下的电源（标准）： | 650mW @ 60MSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | HI5762 |
| 已供物品： | 板 |
Application Note 9811
Evaluation Board Layout and Power
Supplies
The HI5762 evaluation board is a four layer board with a
layout optimized for the best performance of the ADC.
Included in the application note are electrical schematics of
the evaluation board, a component parts list, a component
placement layout drawing and reproductions of the various
board layers used in the board stack-up. The user should
feel free to copy the layout in their application. Refer to the
component layout and the evaluation board electrical
schematic for the following discussions.
The HI5762 monolithic A/D converter has been designed
with separate analog and digital supply and ground pins to
keep digital noise out of the analog signal path. The
evaluation board provides separate low impedance analog
and digital ground planes on layer 2. Since the analog and
digital ground planes are connected together at a single
point where the power supplies enter the board, DO NOT tie
them together back at the power supplies.
The analog and digital power planes are also kept separate
on the evaluation board and should be driven by clean linear
regulated supplies. The external power supplies are hooked
up with the twisted pair wires soldered to the plated through
holes marked +5VAIN, +5VAIN1, -5VAIN, +5VDIN,
+5VD1IN, +5VD2IN, AGND and DGND. The +5VDIN,
+5VD1IN and +5VD2IN are digital supplies and are returned
to DGND. The +5VAIN, +5VAIN1 and -5VAIN are the analog
supplies and are returned to AGND. Table 1 lists the
operational supply voltages, typical current consumption and
the evaluation board circuit function being powered. Single
supply operation of the converter is possible but the overall
performance of the converter may degrade.
TABLE 1. HI5762EVAL2 EVALUATION BOARD POWER
SUPPLIES
Sample Clock Driver, Timing and I/O
In order to ensure rated performance of the HI5762, the duty
cycle of the sample clock should be held at 50% ± 5%. It must
also have low phase noise and operate at standard TTL levels.
A CMOS inverter (U7) used as a voltage comparator is
provided on the evaluation board to generate the sampling
clock for the HI5762 when a sinewave (< 2V p-p ) or
squarewave clock is applied to the CLK input (J3) of the
evaluation board. A potentiometer (VR2) is provided to allow
the user to adjust the duty cycle of the sampling clock to
obtain the best performance from the ADC and to allow the
user to investigate the effects of expected duty cycle
variations on the performance of the converter. The HI5762
clock input trigger level is approximately 1.5V. Therefore, the
duty cycle of the sampling clock should be measured at this
1.5V trigger level. U7-2 provides a convenient point to
monitor the sample clock duty cycle and make any required
adjustments.
Figure 2 shows the sample clock and digital data timing
relationship for the evaluation board. The data
corresponding to a particular sample will be available at the
digital data outputs of the HI5762 after the data latency time,
t LAT , of 6 sample clock cycles plus the HI5762 digital data
output delay, t OD . Table 2 lists the values that can be
expected for the indicated timing delays. Refer to the HI5762
data sheet for additional timing information.
The sample clock and digital output data signals are made
available through two connectors contained on the
evaluation board. The line buffering provided by the data
output latches allows for driving long leads or analyzer
inputs. These data latches are not necessary for the digital
output data if the load presented to the converter does not
exceed the data sheet load limits of 100mA and 15pF. The
P2 I/O connector allows the evaluation board to be
POWER
SUPPLY
+5VAIN
NOMINAL
VALUE
5.0V ± 5%
CURRENT
(TYP)
51mA
FUNCTION(S)
SUPPLIED
Analog Input Op Amps,
Reference Voltage Op
Amps, Bandgap Refer-
interfaced to the DSP evaluation boards available from
Intersil. Alternatively, the digital output data and sample
clock can also be accessed by clipping the test leads of a
logic analyzer or data acquisition system onto the I/O pins of
connector header P1.
ence
TABLE 2. TIMING SPECIFICATIONS
+5VA1IN
-5VAIN
5.0V ± 5%
-5.0V ± 5%
73mA
50mA
A/D AV CC1 and AV CC2
Analog Input Op Amps,
Reference Voltage Op
PARAMETER
t OD
DESCRIPTION
HI5762 Digital Output Data Delay
TYP
50ns
Amps
t PD1
U7 Prop Delay
9ns
+5VDIN
5.0V ± 5%
15mA
Sample Clock Genera-
t PD2
U10/11 Prop Delay
4.5ns
tor and D-FF’s
+5VD1IN
5.0V ± 5%
61mA
A/D DV CC1 and
HI5762 Performance Characterization
DV CC2
Dynamic testing is used to evaluate the performance of the
+5VD2IN
5.0V ± 5% or
3.0V ± 10%
4.5mA
A/D DV CC3
HI5762 A/D converter. Among the tests performed are
Signal-to-Noise and Distortion Ratio (SINAD), Signal-to-
Noise Ratio (SNR), Total Harmonic Distortion (THD),
Spurious Free Dynamic Range (SFDR) and Intermodulation
Distortion (IMD).
3-2
相关PDF资料 |
PDF描述 |
|---|---|
| HI5767EVAL1 | EVALUATION PLATFORM HI5767 |
| HI5767EVAL2 | EVALUATION PLATFORM HI5767 |
| HI5805EVAL1 | EVALUATION PLATFORM HI5805 |
| HI5828EVAL2 | EVALUATION PLATFORM HI5828 |
| HI5960SOICEVAL1 | EVALUATION PLATFORM SOIC HI5960 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HI5766 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 60 MSPS A/D Converter |
| HI5766_05 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:10-Bit, 60MSPS A/D Converter |
| HI5766EVAL1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述: |
| HI5766KCA | 功能描述:IC ADC 10-BIT 60MSPS 28-SSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| HI5766KCAZ | 功能描述:模数转换器 - ADC A/D 10-BIT 60MSPS 28 SSOP COM TEMP RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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