SP7800 Просмотр технического описания (PDF) - Signal Processing Technologies
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производитель
SP7800 Datasheet PDF : 13 Pages
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PINOUT
IN1 1
IN2 2
N.C. 3
AGND 4
D11 5
D10 6
D9 7
D8 8
D7 9
D6 10
D5 11
D4 12
SP7800A
24 VSA
23 VSD
22 N.C.
21 BUSY
20 CS
19 R/C
18 HBE
17 D0
16 D1
15 D2
14 D3
13 DGND
PIN ASSIGNMENT
Pin 1 — IN1 — ±10V Analog Input. Connected to
AGND for ±5V range.
Pin 2 — IN2 — ±5V Analog Input. Connected to
AGND for ±10V range.
Pin 3 — N.C. — This pin is not internally connected.
Pin 4 — AGND — Analog Ground. Connect to pin
13 at the device.
Pin 5 — D — Data Bit 11. Most Significant Bit
11
(MSB).
Pin 6 — D10 — Data Bit 10.
Pin 7 — D — Data Bit 9.
9
Pin 8 — D8 — Data Bit 8.
Pin 9 — D7 — Data Bit 7 if HBE is LOW; LOW if
HBE is HIGH.
Pin 10 — D — Data Bit 6 if HBE is LOW; LOW if
6
HBE is HIGH.
Pin 11 — D — Data Bit 5 if HBE is LOW; LOW if
5
HBE is HIGH.
Pin 12 — D4 — Data Bit 4 if HBE is LOW; LOW if
HBE is HIGH.
Pin 13 — DGND — Digital Ground. Connect to pin
4 at the device.
Pin 14 — D — Data Bit 3 if HBE is LOW; Data Bit
3
11 if HBE is HIGH.
Pin 15 — D — Data Bit 2 if HBE is LOW; Data Bit
2
10 if HBE is HIGH.
Pin 16 — D1 — Data Bit 1 if HBE is LOW; Data Bit
9 if HBE is HIGH.
Pin 17 — D0 — Data Bit 0 if HBE is LOW. Least
Significant Bit (LSB). Data Bit 8 if HBE is HIGH.
Pin 18 — HBE — High Byte Enable, When held
LOW, data output as 12-bits in parallel. When held
HIGH, four MSBs presented on pins 14–17, pins 9 –
12 output LOWs. Must be LOW to initiate conver-
sion.
Pin 19 — R/C — Read/Convert. Falling edge initiates
conversion when CS is LOW, HBE is LOW, and
BUSY is HIGH.
Pin 20 — CS — Chip Select. Outputs in Hi-Z state
when HIGH. Must be LOW to initiate conversion or
read data.
Pin 21 — BUSY . Output LOW during conversion.
Data valid on rising edge in Convert Mode.
Pin 22 — N.C. — This pin is not internally connected.
Pin23—V —PositiveDigitalPowerSupply,+5V.
SD
Connect to pin 24, and bypass to DGND.
Pin 24 — V — Positive Analog Power Supply.
SA
+5V. Connect to pin 23, and bypass to AGND.
FEATURES...
The SP7800A is specified at a 333kHz sampling rate.
Conversion time is factory set for 2.70µs max over
temperature, and the high-speed sampling input stage
insures a total acquisition and conversion time of 3µs
max over temperature. Precision, laser–trimmed scal-
SP7800ADS/02
SP7800A 12-Bit 3µs Sampling A/D Converter
4
© Copyright 2000 Sipex Corporation
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