参数资料
| 型号： | AD7634BCPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/32页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT BIPO PROGR 48-LFCSP |
| 标准包装： | 1 |
| 系列： | PulSAR® |
| 位数： | 18 |
| 采样率（每秒）： | 670k |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 225mW |
| 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-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 48-LFCSP-VQ（7x7） |
| 包装： | 托盘 |
| 输入数目和类型： | 1 个差分，单极；1 个差分，双极 |
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AD7634
Data Sheet
Rev. B | Page 18 of 32
Warp Mode
Setting WARP = high and IMPULSE = low allows the fastest
conversion rate of up to 670 kSPS. However, in this mode, the
full-specified accuracy is guaranteed only when the time between
conversions does not exceed 1 ms. If the time between two
consecutive conversions is longer than 1 ms (after power-up),
the first conversion result should be ignored because in warp mode,
the ADC performs a background calibration during the SAR
conversion process. This calibration can drift if the time between
conversions exceeds 1 ms thus causing the first conversion to
appear offset. This mode makes the AD7634 ideal for applications
where both high accuracy and fast sample rate are required.
Normal Mode
Setting WARP = IMPULSE = low or WARP = IMPULSE = high
allows the fastest mode (570 kSPS) without any limitation on
time between conversions. This mode makes the AD7634 ideal
for asynchronous applications such as data acquisition systems,
where both high accuracy and fast sample rate are required.
Impulse Mode
Setting WARP = low and IMPULSE = high uses the lowest power
dissipation mode and allows power savings between conver-
sions. The maximum throughput in this mode is 450 kSPS, and
in this mode, the ADC powers down circuits after conversion,
making the AD7634 ideal for battery-powered applications.
TRANSFER FUNCTIONS
Except in 18-bit parallel interface mode, using the D0/OB/2C
digital input or via the configuration register, the AD7634 offers
two output codings: straight binary and twos complement. See
digital output codes for the different analog input ranges, VIN.
Note that when using the configuration register, the D0/OB/2C
input is a don’t care and should be tied to either high or low.
000...000
000...001
000...010
111...101
111...110
111...111
A
DC
CO
DE
(
S
tr
ai
g
h
tBi
n
ar
y)
ANALOG INPUT
+FSR – 1.5 LSB
+FSR –1LSB
–FSR + 1 LSB
–FSR
–FSR + 0.5 LSB
06
40
6-
0
26
Figure 26. ADC Ideal Transfer Function
Table 8. Output Codes and Ideal Input Voltages
VREF = 5 V
Digital Output Code
Description
VIN = 0 V to +5 V
(10 V p-p)
VIN = 0 V to +10 V
(20 V p-p)
VIN = ±5 V
(20 V p-p)
VIN = ±10 V
(40 V p-p)
Straight Binary
Twos Complement
FSR 1 LSB
+4.999962 V
+9.999924 V
+19.999847 V
FSR 2 LSB
+4.999924 V
+9.999847 V
+19.999695 V
0x3FFFE
0x1FFFE
Midscale + 1 LSB
+38.15 μV
76.29 μV
+152.59 μV
0x20001
0x00001
Midscale
0 V
0x20000
0x00000
Midscale 1 LSB
38.15 μV
76.29 μV
152.59 μV
0x1FFFF
0x3FFFF
FSR + 1 LSB
4.999962 V
9.999924 V
19.999847 V
0x00001
0x20001
FSR
5 V
10 V
20 V
1 This is also the code for overrange analog input.
2 This is also the code for underrange analog input.
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| AD7634BCPZRL | 功能描述:IC ADC 18BIT DIFF BIPO 48-LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7634BSTZ | 功能描述:IC ADC 18BIT DIFF BIPO 48-LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7634BSTZRL | 功能描述:IC ADC 18BIT DIFF BIPO 48-LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| AD7641 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Bit, 750 kSPS, Unipolar/Bipolar Programmable Input PulSAR ADC |
| AD7641ACP | 制造商:Analog Devices 功能描述:ADC SGL SAR 2MSPS 18BIT PARALLEL/SERL 48LFCSP - Trays |
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