A/D Converter. HI7191 Datasheet

HI7191 Converter. Datasheet pdf. Equivalent

HI7191 Datasheet
Recommendation HI7191 Datasheet
Part HI7191
Description Sigma Delta A/D Converter
Feature HI7191; HI7191 24-Bit, High Precision, Sigma Delta A/D Converter The Intersil HI7191 is a monolithic instru.
Manufacture Renesas
Datasheet
Download HI7191 Datasheet




Renesas HI7191
HI7191
24-Bit, High Precision, Sigma Delta A/D Converter
The Intersil HI7191 is a monolithic instrumentation, sigma
delta A/D converter which operates from 5V supplies. Both
the signal and reference inputs are fully differential for
maximum flexibility and performance. An internal
Programmable Gain Instrumentation Amplifier (PGIA)
provides input gains from 1 to 128 eliminating the need for
external pre-amplifiers. The on-demand converter
auto-calibrate function is capable of removing offset and gain
errors existing in external and internal circuitry. The on-board
user programmable digital filter provides over 120dB of
60/50Hz noise rejection and allows fine tuning of resolution
and conversion speed over a wide dynamic range. The
HI7190 and HI7191 are functionally the same device, but the
HI7190 has tighter linearity specs.
The HI7191 contains a serial I/O port and is compatible with
most synchronous transfer formats including both the
Motorola 6805/11 series SPI and Intel 8051 series SSR
protocols. A sophisticated set of commands gives the user
control over calibration, PGIA gain, device selection, standby
mode, and several other features. The On-chip Calibration
Registers allow the user to read and write calibration data.
Ordering Information
PART
NUMBER
PART
MARKING
TEMP.
RANGE
(°C)
PKG.
PACKAGE DWG. #
HI7191IP
HI7191IP
-40 to 85 20 Ld PDIP E20.3
HI7191IPZ HI7191IPZ
(See Note)
-40 to 85 20 Ld PDIP* E20.3
(Pb-free)
HI7191IB
HI7191IB
-40 to 85 20 Ld SOIC M20.3
HI7191IBZ HI7191IBZ
(See Note)
-40 to 85 20 Ld SOIC M20.3
(Pb-free)
HI7191IBZ-T HI7191IBZ
(See Note)
-40 to 85 20 Ld SOIC M20.3
Tape and Reel
(Pb-free)
HI7190EVAL Evaluation Kit
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
DATASHEET
FN4138
Rev 8.00
June 1, 2006
Features
• 20-Bit Resolution with No Missing Code
• 0.0015% Integral Non-Linearity (Typ)
• 20mV to 2.5V Full Scale Input Ranges
• Internal PGIA with Gains of 1 to 128
• Serial Data I/O Interface, SPI Compatible
• Differential Analog and Reference Inputs
• Internal or System Calibration
• 120dB Rejection of 60/50Hz Line Noise
• Settling Time of 4 Conversions (Max) for a Step Input
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Process Control and Measurement
• Industrial Weight Scales
• Part Counting Scales
• Laboratory Instrumentation
• Seismic Monitoring
• Magnetic Field Monitoring
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• TB348 “HI7190/1 Negative Full Scale Error vs
Conversion Frequency”
• AN9504 “A Brief Intro to Sigma Delta Conversion”
• TB329 “Intersil Sigma Delta Calibration Technique”
• AN9505 “Using the HI7190 Evaluation Kit”
• TB331 “Using the HI7190 Serial Interface”
• AN9527 “Interfacing HI7190 to a Microcontroller”
• AN9532 “Using HI7190 in a Multiplexed System”
• AN9601 “Using HI7190 with a Single +5V Supply”
FN4138 Rev 8.00
June 1, 2006
Page 1 of 25



Renesas HI7191
HI7191
Pinout
HI7191 (PDIP, SOIC)
TOP VIEW
SCLK 1
SDO 2
SDIO 3
CS 4
DRDY 5
DGND 6
AVSS
VRLO
VRHI
VCM
7
8
9
10
20 MODE
19 SYNC
18 RESET
17 OSC1
16 OSC2
15 DVDD
14 AGND
13 AVDD
12 VINHI
11 VINLO
Functional Block Diagram
AVDD
TRANSDUCER
BURN-OUT
CURRENT
VINHI
VINLO
PGIA
VCM
CLOCK
GENERATOR
OSC1 OSC2
VRHI
VRLO
REFERENCE
INPUTS

MODULATOR
1-BIT
D/A
DIGITAL FILTER
1
CONTROL AND SERIAL INTERFACE UNIT
CONTROL REGISTER
SERIAL INTERFACE
UNIT
DRDY RESET SYNC CS MODE
SCLK SDIO SDO
FN4138 Rev 8.00
June 1, 2006
Page 2 of 25



Renesas HI7191
HI7191
Typical Application Schematic
10MHz
INPUT +
INPUT -
+5V +
0.1F
R1
+2.5V
REFERENCE
-5V
0.1F
+ 4.7F
17 16
13
OSC1 OSC2
AVDD
DVDD
15
+
4.7F
12 VINHI
11 VINLO
10 VCM
SCLK
SDIO
SDO
0.1F
1
3
2
9 VRHI
8 VRLO
7 AVSS
AGND
14
SYNC
CS
DRDY
RESET
MODE
DGND
6
19
4
5
18
20
+5V
4.7F
DATA I/O
DATA OUT
SYNC
CS
DRDY
RESET
FN4138 Rev 8.00
June 1, 2006
Page 3 of 25







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