ADC78H89_14 Datasheet, PDF (1/23 Pages) Texas Instruments – 7-Channel, 500 KSPS, 12-Bit A/D Converter

ADC78H89
www.ti.com
SNAS201D – APRIL 2003 – REVISED MARCH 2013
ADC78H89 7-Channel, 500 KSPS, 12-Bit A/D Converter
Check for Samples: ADC78H89
FEATURES
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•23 Seven Input Channels
• Variable Power Management
• Independent Analog and Digital Supplies
• SPI™/QSPI™/MICROWIRE™/DSP Compatible
• Packaged in 16-Lead TSSOP
APPLICATIONS
• Automotive Navigation
• Portable Systems
• Medical Instruments
• Mobile Communications
• Instrumentation and Control Systems
KEY SPECIFICATIONS
• Conversion Rate: 500 KSPS
• DNL: ± 1 LSB (max)
• INL: ± 1 LSB (max)
• Power Consumption
– 3V Supply: 1.5 mW (typ)
– 5V Supply: 8.3 mW (typ)
DESCRIPTION
The ADC78H89 is a low-power, seven-channel
CMOS 12-bit analog-to-digital converter with a
conversion throughput of 500 KSPS. The converter is
based on a successive-approximation register
architecture with an internal track-and-hold circuit. It
can be configured to accept up to seven input signals
on pins AIN1 through AIN7.
The output serial data is straight binary, and is
compatible with several standards, such as SPI™,
QSPI™, MICROWIRE™, and many common DSP
serial interfaces.
The ADC78H89 may be operated with independent
analog and digital supplies. The analog supply (AV_DD)
can range from +2.7V to +5.25V, and the digital
supply (DV_DD) can range from +2.7V to AV_DD. Normal
power consumption using a +3V or +5V supply is
1.5 mW and 8.3 mW, respectively. The power-down
feature reduces the power consumption to just
0.3 µW using a +3V supply, or 0.5 µW using a +5V
supply. The ADC78H89 is packaged in a 16-lead
TSSOP package. Operation over the industrial
temperature range of −40°C to +85°C is ensured.
Connection Diagram
CS
NC
AV_DD
GND
AIN1
AIN2
AIN3
AIN4
1
16
2
15
3
14
4
13
ADC78H89
5
12
6
11
7
10
8
9
SCLK
DOUT
DIN
DV_DD
GND
AIN7
AIN6
AIN5
Figure 1. 16-Lead TSSOP
See PW Package
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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