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| 型号： | AD7938BSUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 8CHAN 32TQFP |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 1.5M |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 13.5mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（7x7） |
| 包装： | 托盘 |
| 输入数目和类型： | 8 个单端，单极；4 个差分，单极；4 个伪差分，单极；7 伪差分，单极 |
| 配用： | EVAL-AD7938CBZ-ND - EVAL BOARD FOR AD7938 |
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8-Channel, 1.5 MSPS, 12-Bit and 10-Bit
Parallel ADCs with a Sequencer
Data Sheet
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2004–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Throughput rate: 1.5 MSPS
Specified for VDD of 2.7 V to 5.25 V
Power consumption
6 mW maximum at 1.5 MSPS with 3 V supplies
13.5 mW maximum at 1.5 MSPS with 5 V supplies
8 analog input channels with a sequencer
Software-configurable analog inputs
8-channel single-ended inputs
4-channel fully differential inputs
4-channel pseudo differential inputs
7-channel pseudo differential inputs
Accurate on-chip 2.5 V reference
±0.2% maximum @ 25°C, 25 ppm/°C maximum
69 dB SINAD at 50 kHz input frequency
No pipeline delays
High speed parallel interface—word/byte modes
Full shutdown mode: 2 A maximum
32-lead LFCSP and TQFP packages
FUNCTIONAL BLOCK DIAGRAM
03715-
001
VIN7
T/H
PARALLEL INTERFACE/CONTROL REGISTER
SEQUENCER
12-/10-BIT
SAR ADC
AND
CONTROL
I/P
MUX
2.5V
VREF
DB0
DB11
VDRIVE
VDD
AD7938/AD7939
VIN0
AGND
VREFIN/
VREFOUT
CLKIN
BUSY
CONVST
CS
DGND
RD WR W/B
Figure 1.
GENERAL DESCRIPTION
The AD7938/AD7939 are 12-bit and 10-bit, high speed, low
power, successive approximation (SAR) analog-to-digital
converters (ADCs). The parts operate from a single 2.7 V to
5.25 V power supply and feature throughput rates up to
1.5 MSPS. The parts contain a low noise, wide bandwidth,
differential track-and-hold amplifier that can handle input
frequencies up to 50 MHz.
The AD7938/AD7939 feature eight analog input channels with
a channel sequencer that allows a preprogrammed selection of
channels to be converted sequentially. These parts can operate
with either single-ended, fully differential, or pseudo
differential analog inputs.
The conversion process and data acquisition are controlled
using standard control inputs that allow easy interfacing with
microprocessors and DSPs. The input signal is sampled on the
falling edge of CONVST and the conversion is also initiated at
this point.
The AD7938/AD7939 have an accurate on-chip 2.5 V reference
that can be used as the reference source for the analog-to-digital
conversion. Alternatively, this pin can be overdriven to provide
an external reference.
These parts use advanced design techniques to achieve very
low power dissipation at high throughput rates. They also
feature flexible power management options. An on-chip control
register allows the user to set up different operating conditions,
including analog input range and configuration, output coding,
power management, and channel sequencing.
PRODUCT HIGHLIGHTS
1. High throughput with low power consumption.
2. Eight analog inputs with a channel sequencer.
3. Accurate on-chip 2.5 V reference.
4. Single-ended, pseudo differential, or fully differential
analog inputs that are software selectable.
5. Single-supply operation with VDRIVE function. The VDRIVE
function allows the parallel interface to connect directly to
3 V or 5 V processor systems independent of VDD.
6. No pipeline delay.
7. Accurate control of the sampling instant via a CONVST
input and once-off conversion control.
Table 1. Related Devices
Device
No. of Bits
No. of Channels
Speed
12/10
4
1.5 MSPS
12
8
625 kSPS
12
4
625 kSPS
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相关代理商/技术参数 |
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| AD7938BSUZ6 | 制造商:AD 功能描述:Pb Free |
| AD7938BSUZ-6 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7938BSUZ-6REEL7 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7938BSUZ-REEL7 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| AD7939 | 制造商:AD 制造商全称:Analog Devices 功能描述:8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer |
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