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| 型号： | AD7870KNZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 27/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SAMPLING 3V 24-DIP |
| 产品变化通告： | Conversion Time Change |
| 标准包装： | 15 |
| 位数： | 12 |
| 采样率（每秒）： | 100k |
| 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： | 24-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 24-PDIP |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，双极 |
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AD7870/AD7875/AD7876
Rev. C | Page 8 of
28
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
RD 1
BUSY/INT 2
CLK 3
DB11/HBEN 4
CS
24
CONVST
23
12/8/CLK
22
VSS
21
DB10/SSTRB 5
DB9/SCLK 6
DB8/SDATA 7
VIN
20
REF OUT
19
AGND
18
DB7/LOW 8
VDD
17
DB6/LOW 9
DB0/DB8
16
DB5/LOW 10
DB1/DB9
15
DB4/LOW 11
DB2/DB10
14
DGND 12
DB3/DB11
13
AD7870/
AD7875/
AD7876
TOP VIEW
(Not to Scale)
07
73
0-
0
04
Figure 2. DIP and SOIC Pin Configuration
128 27 26
2
3
4
5
6
7
8
9
10
11
25
24
23
22
21
20
19
NC = NO CONNECT
DB11/HBEN
DB10/SSTRB
DB9/SCLK
NC
DB8/SDATA
DB7/LOW
DB6/LOW
VSS
VIN
REF OUT
NC
AGND
VDD
DB0/DB8
CL
K
B
U
S
Y
/IN
T
RD
NC
CS
CO
NV
S
T
12/
8/
CL
K
DB5/
L
O
W
DB4/
L
O
W
DG
ND
NC
DB
3/
DB
11
DB2/
DB10
DB
1/
DB
9
PIN 1
INDENTFIER
12 13 14 15 16 17 18
07
73
0-
0
05
AD7870/AD7875/
AD7876
TOP VIEW
(Not to Scale)
Figure 3. PLCC Pin Configuration
Table 5. Pin Function Descriptions
DIP and SOIC
Pin No.
PLCC
Pin No.
Mnemonic
Function
N/A
1, 8, 15,
22
NC
No Connect.
1
2
RD
Read. Active low logic input. This input is used in conjunction with CS low to enable the data outputs.
2
3
BUSY/INT
Busy/Interrupt. Active low logic output indicating converter status. See Figure 14, Figure 15, Figure 16,
and Figure 17.
3
4
CLK
Clock Input. An external TTL-compatible clock may be applied to this input pin. Alternatively, tying this
pin to VSS enables the internal laser-trimmed clock oscillator.
4
5
DB11/HBEN
Data Bit 11 (MSB)/High Byte Enable. The function of this pin is dependent on the state of the 12/8/CLK
input. When 12-bit parallel data is selected, this pin provides the DB11 output. When byte data is
selected, this pin becomes the HBEN logic input. HBEN is used for 8-bit bus interfacing. When HBEN is
low, DB7/LOW to DB0/DB8 become DB7 to DB0. With HBEN high, DB7/LOW to DB0/DB8 are used for
the upper byte of data (see
).
5
6
DB10/SSTRB
Data Bit 10/Serial Strobe. When 12-bit parallel data is selected, this pin provides the DB10 output.
SSTRB is an active low open-drain output that provides a strobe or framing pulse for serial data. An
external 4.7 kΩ pull-up resistor is required on SSTRB.
6
7
DB9/SCLK
Data Bit 9/Serial Clock. When 12-bit parallel data is selected, this pin provides the DB9 output. SCLK is
the gated serial clock output derived from the internal or external ADC clock. If the 12/8/CLK input is at
5 V, then SCLK runs continuously. If 12/8/CLK is at 0 V, then SCLK is gated off after serial transmission is
complete. SCLK is an open-drain output and requires an external 2 kΩ pull-up resistor.
7
9
DB8/SDATA
Data Bit 8/Serial Data. When 12-bit parallel data is selected, this pin provides the DB8 output. SDATA is
an open-drain serial data output which is used with SCLK and SSTRB for serial data transfer. Serial data
is valid on the falling edge of SCLK while SSTRB is low. An external 4.7 kΩ pull-up resistor is required on
SDATA.
8 to11
10 to 13
DB7/LOW–
DB4/LOW
Three-state data outputs controlled by CS and RD. Their function depends on the 12/8/CLK and HBEN
inputs. With 12/8/CLK high, they are always DB7–DB4. With 12/8/CLK low or 5 V, their function is
controlled by HBEN (see
12
14
DGND
Digital Ground. Ground reference for digital circuitry.
13 to 16
16 to 19
DB3/DB11–
DB0/DB8
Three-state data outputs which are controlled by CS and RD. Their function depends on the 12/8/CLK
and HBEN inputs. With 12/8/CLK high, they are always DB3–DB0. With 12/8/CLK low or 5 V, their
function is controlled by HBEN (see
17
20
VDD
Positive Supply, +5 V ± 5%.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7870KNZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs |
| AD7870KP | 制造商:Analog Devices 功能描述:ADC Single SAR 100ksps 12-bit Parallel/Serial 28-Pin PLCC 制造商:Analog Devices 功能描述:A/D Converter (A-D) IC |
| AD7870KP-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD7870KPZ | 功能描述:IC ADC 12BIT SAMPLING 3V 28PLCC 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 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 |
| AD7870KPZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs |
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