AD7871TQ Analog Devices Inc, AD7871TQ Datasheet - Page 5

• Manufacturer Part Number: AD7871TQ
• Description: IC ADC 14BIT SAMPLING 28-CDIP
• Manufacturer: Analog Devices Inc

Specifications of AD7871TQ

• Rohs Status: RoHS non-compliant
• Number Of Bits: 14
• Sampling Rate (per Second): 83k
• Data Interface: Serial, Parallel
• Number Of Converters: 1
• Power Dissipation (max): 95mW
• Voltage Supply Source: Dual ±
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 28-CDIP (0.600", 15.24mm)

AD7872 PIN FUNCTION DESCRIPTION
DIP
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
REV. D
Mnemonic
CONTROL
CONVST
CLK
SSTRB
SCLK
SDATA
NC
DGND
V
NC
C
AGND
REF OUT
V
V
V
DD
IN
SS
DD
REF
DIP
Control Input. With this pin at 0 V, the SCLK is noncontinuous; with this pin at –5 V, the SCLK
Analog Ground. Ground reference for analog circuitry.
Function
is continuous.
Convert Start. A low to high transition on this input puts the track/hold into the hold mode. This
input is asynchronous to the CLK.
Clock Input. An external TTL-compatible clock may be applied to this input. Alternatively, tying
this pin to V
This is an active low three-state output that provides a framing pulse for serial data. An external
4.7 k pull-up resistor is required on SSTRB.
Serial Clock. SCLK is the gated serial clock output derived from the internal or external ADC
clock. If the 14/8/CLK input is at –5 V, then the SCLK runs continuously. With CONTROL
at 0 V, it is gated off (three-state) after serial transmission is complete. SCLK is an open-drain
output and requires an external 2 k pull-up resistor.
Serial Data. This is the three-state serial data output used in conjunction with SCLK and SSTRB in
serial data transmission. Serial data is valid on the falling edge of SCLK, when SSTRB is low. An
external 4.7 k pull-up resistor is required on SDATA.
No Connect.
Digital Ground. Ground return for digital circuitry.
Positive Supply for analog circuitry, +5 V
No Connect.
Decoupling point for on-chip reference. Connect 10 nF capacitor between this pin and AGND.
Voltage Reference Output. The internal 3 V reference is provided at this pin. The external load
capability is 500 A.
Analog Input. The input range is 3 V.
Negative Supply, –5 V
Positive Supply for analog circuitry, +5 V
SS
, enables the internal laser-trimmed oscillator.
5%.
PIN CONFIGURATIONS
DIP, SOIC
–5–
5%. Pin 16 and Pin 9 should be connected together.
5%.
AD7871/AD7872
PLCC